Hansen HA4A series Operating instructions

HA4AB
Regulator With Electric Wide Opening
INTRODUCTION
These advanced-design, strong-bodied, precision-
manufactured MODULAR regulators are superior in
their ability to overcome dirt and sticky oil during
opening and tight closing. Models are available for
nearly every control function requirement of industrial
ammonia and commercial halocarbon refrigeration.
These regulators are ideal for cold storage plants,
poultry plants, meat packing, fish processing, freezers,
ice plants, breweries, bottling plants, heat recovery
units, petrochemical plants, pharmaceutical plants,
supermarkets, and many others.
APPLICATIONS
Evaporator Pressure Control
Defrost Pressure Control
Condensing Pressure Regulation
Receiver Pressure Control
Hot Gas Bypass Capacity Regulation
Suction Pressure Control
Air or Liquid Temperature Regulation
Internal System Pressure Relief
Bulletin R429d
MAR 2002
Specifications, Applications,
Service Instructions & Parts
HA4A MODULAR
PRESSURE REGULATORS ¾"
THROUGH 6" PORT (20 MM
THROUGH 150 MM)
Various Connection
Styles and Sizes
for Refrigerants
KEY FEATURES
ADDITIONAL FEATURES
Tolerant of Dry Systems
For Ammonia, R22, R134a and other Hansen-
Approved Refrigerants
Wide Range of Options
Inlet, Outlet, or Differential Pressure
Wide Pressure Ranges
Electric Shut- Off, Dual, or Wide-Opening Available
Safe Working Pressure: 400 psig (27 bar)
CSA Certified, CRN for Canada
Contents
Page
Regulator Variations
3
Capacities
4–5
Control Modules (Pilots)
6
Main Regulators Only (AR1, AR3)
7
Operation and Adjustment
8–11
Installation Dimensions
12–13
Parts List
14–18
Service and Maintenance, Abbreviations
19
Ordering Information, Conversions
20

MATERIAL SPECIFICATIONS
Body:
¾" through 4": Ductile iron, ASTM A536
5" & 6": Cast steel, ASTM A352 LCB
Adapter: Ductile iron, ASTM A536
Piston: Steel, disc type, Teflon piston seal
V-Port/Seat: ductile iron, with Teflon seat
Main Seat: ¾" through 1¼": integral ductile iron
1½" through 6": stainless steel, removable
Gaskets: Nonasbestos, graphite composite
Manual Opening Stem: Steel, plated Pilots:
Stainless steel trim
Pilot Orifice: Stainless steel Flanges:
Forged steel, ASTM A105
Safe Working Pressure: 400 psig (27 bar) Operating
Temperature: –60F to +240F (–50°C to
+115°C), lower temperatures possible at
pressure downratings
ADVANTAGES
These valves combine modern design and new age
materials with advanced manufacturing techniques and
intense quality control to offer a significantly superior
and reliable product. Their ductile iron bodies are
stronger and more rugged than common cast iron, or
so called semi-steel (class B iron), valves. They are
more dirt resistant than full skirted- piston-design
valves. All regulators use energized Teflon dirt-wiping
piston seals which operate reliably, even under dry, oil-
free conditions. The screw-on control modules (pilots)
are easy to change and can be used on all valve sizes.
All valves incorporate Teflon seating and stainless
steel spring closing. Manual-opening stems are located
on top of valves, up and away from dirt and rust
particles to avoid thread jamming. Nonasbestos
gaskets are standard. These standard regulator valves
use the same flanges and spacing as R/S model A4A,
except 1¼" (32 mm). Special Hansen 1¼" 4-bolt
regulators are available from stock to exactly replace
R/S 1¼" A4A only.
SIZING
Proper regulator valve sizing is important for smooth
operation and long, trouble-free life of the valve.
Therefore, capacity of the regulator at both the
maximum and minimum flow and pressure drop should
be analyzed. Pressure regulators will operate
satisfactorily to approximately 15% of the maximum
capacity of valve based on the corresponding pressure
drop. In extreme cases, downsizing or two smaller
regulators in parallel are necessary. For pressure drops
exceeding 45 psi (3.1 bar), special construction may be
required. Contact the factory.
INSTALLATION
Regulators should be protected from dirt and moisture
during storage. The arrow on the body should be in the
normal direction of refrigerant flow. These valves will
not prevent reverse flow; use check valves where
necessary. Regulators are normally in horizontal pipe
lines with pilots and manual -opening stems on top. Do
not rotate the position of the valve adapter or the valve
will not operate.
The system should be free of dirt, weld slag, and rust
particles. Regulators can be equipped with separate,
close-coupled inlet strainers. No small, hidden, internal
screens are used. Gauges and gauge valves should be
installed on the inlet and outlet to help in system
diagnosis. Because of the many regulator pilot
combinations, during installation of a large job, the
regulator nameplates should be checked against piping
drawings to guarantee proper function for each
location. Where pilot solenoid control modules are
used, the nameplate coil voltage should be checked
before wiring. Pipe sizing, anchoring, valve rating,
system design, and other precautionary factors should
be taken into consideration to ensure “liquid hammer”
will not occur when the valve opens or closes.
The 5" and 6" valves are type HA4W with integral butt
weld end only. These steel-bodied regulators are
directly welded into the pipe line. During welding, the
manual-opening stem should be opened downward
several turns to protect the Teflon seat from weld heat.
Welds should be annealed as necessary in accordance
with good practice. Painting of valves and welds is
recommended for corrosion protection. Pipe covering,
where applied, should have proper moisture barrier.
Before putting valves into service, all pipe connections,
valve seats, cover seals, and stem seals should be
tested for leaks at pressure levels called for in
appropriate codes.
ELECTRICAL
When the electric shut-off, wide-opening, or dual
feature is supplied, a Hansen low-wattage, molded
electrical coil is included. Standard coil voltages are
115V, 208/230V, or 24V at 50/60Hz. Other voltages
available. The coil properly operates between 85% and
110% of the rated voltage. Coils should only be
energized while on the pilot solenoid tube. Unless
otherwise specified, the standard coil with a ½" fitting
for conduit is supplied with valves.
A watertight solenoid coil with 18" (450 mm) long wire
pigtail leads and a steel frame housing with a ½"
conduit fitting is standard.
Optional DIN Plug Coils are for grounded cord
connections and include the necessary DIN plug socket
with gasket.
Coils with Junction Boxes are optional. Integral, steel
junction box for connection of the 18" (450 mm) long
wire pigtail leads.
Vibration-resistant, bright, long-life, neon pilot lights
are available. These pilot lights operate on primary
voltage; a special coil with secondary winding is not
necessary. Optional watertight pilot light assembly is
also available; see page 20.
R429d
2
MAR 2002

REGULATOR VARIATIONS
HA4A STANDARD REGULATOR
This most common pressure regulator
modulates to control evaporator
pressure, condensing pressure,
pressure in a vessel, or pressure in a
portion of a system. It is frequently
called an evaporator pressure regulator
(EPR) or back pressure regulator. Opens
on rising inlet pressure. See page 10.
Shown with M3W pilot.
HA4AS REGULATOR WITH
ELECTRIC SHUT-OFF
This control is commonly used for
temperature control or defrost.
Regulates at the set-for pressure when
energized. When de-energized, the valve
closes tight regardless of the pressure
setting. See page 11.
HA4AB REGULATOR WITH
ELECTRIC WIDE OPENING
Commonly regulates for defrost or
temperature, but opens wide for
maximum cooling. Regulating at the set-
for pressure when de-energized;
regulator opens when energized. See
page 11.
HA4AD DUAL PRESSURE
REGULATOR
Regulates (evaporator) pressure at a
setting when energized, and at a higher
setting for defrost, temperature control,
or pressure relief when de-energized.
See page 11.
HA4AL DIFFERENTIAL
PRESSURE REGULATOR
Commonly used as liquid pump relief,
condenser-receiver pressure difference
control, discharge pressure boosting for
defrosting or heat recovery, and other
similar applications. This control
modulates to maintain the set-for
difference between inlet and outlet
pressure. See page 10.
HA4AK RESEATING
RELIEF REGULATOR
Used for defrost, high-to- low side relief,
or nonatmosphere relief to other parts of
the system. This control opens when
system upstream pressure is above the
tagged and sealed set point pressure,
and repeatedly reseats after operation.
See page 10.
HA4A
HA4AS
HA4AB
HA4AD
HA4AL
HA4AK
HA4AO OUTLET
PRESSURE REGULATOR
Controls outlet pressure by opening
as downstream pressure falls below
the set point. Used for hot gas to
provide artificial refrigeration loading,
for condenser and receiver pressure
control by means of gas bypass,
limiting hot gas pressure supply in
defrosting evaporator in conjunction
with liquid drain traps, or
for HA4AO
compressor suction pressure limitation.
Can be combined with electric shut-off,
temperature-operated, dual, or wide-
opening features. See page 11.
HA4AP PNEUMATICALLY
COMPENSATED REGULATOR
Commonly used for precise air or liquid
temperature
control
via pneumatic
controller. An air, vapor, or liquid
pressure signal to the control module
bonnet increases inlet pressure from
HA4AP
the set-for pressure value at a 1:1 ratio.
See page 12.
HA4AT TEMPERATURE
OPERATED REGULATOR
The vapor pressure capillary tubing
and bulb system modulates the
regulator open
as
temperature
increases to control air or liquid
temperature. See page 12.
HA4AT
HA4AJ ELECTRONICALLY
CONTROLLED REGULATOR
Electronic pilot and controller provides
very precise temperature control of
various cooled media under fluctuating
load conditions. See page 12.
HA4AJ
HA4AM ELECTRIC MOTOR
COMPENSATED REGULATOR
Commonly used for precise room
temperature control or liquid chiller
control. The controlling motor changes
regulator
pressure
setting
in
accordance
with
a
temperature
controller. See page 13.
HA4AM
NOTE: Many other control functions can be achieved
by combining the control modules in different
arrangements. For example: a dual regulator with
electronic pilot and secondary relief pilot; i.e. HA4ADJ.
3
R429d
MAR 2002

SUCTION VAPOR CAPACITIES (TONS)
(1 Ton= 12,000 Btu/hr= 3.517 kW= 3042 kcal/hr)
PRESSURE
R 717
R22
PORT
Cv
DROP
EVAPORATING TEMPERATURE
EVAPORATING TEMPERATURE
SIZE
(Kv)
ACROSS
(mm)
–40F†
–20F†
0F
+20F
+40F
–40F†
–20F†
0F
+20F
+40F
VALVE‡
(–40°C)
(–28.9°C)
(–17.8°C)
(–6.7°C)
(+4.4°C)
(–40°C)
(–28.9°C)
(–17.8°C)
(–6.7°C)
(+4.4°C)
2 psi
4.7
6.4
7.4
9.5
12
2.1
2.8
2.8
3.6
4.4
3/4"*
6.4
5 psi
6.7
9.7
8.7
15
19
3.2
4.3
4.4
5.5
6.9
(20)
(5.5)
10 psi
a
13
15
20
26
a
5.8
6.0
7.7
9.6
20 psi
a
a
19
27
35
a
a
7.8
10
13
2 psi
8.5
12
13
17
22
3.9
5.2
5.2
6.5
8.0
1"
11.7
5 psi
12
18
16
27
34
5.8
7.9
8.0
10
13
(25)
(10)
10 psi
a
23
28
37
47
a
11
11
14
18
20 psi
a
a
36
49
64
a
a
14
19
24
2 psi
12
16
19
24
31
5.4
7.2
7.2
9.1
11.3
11/ 4 "
16.4
5 psi
17
25
22
38
48
8.1
11
11
14
18
(32)
(14)
10 psi
a
32
39
52
66
a
15
15
20
25
20 psi
a
a
50
69
90
a
a
20
26
34
2 psi
25
35
40
52
65
12
15
15
19
24
11/ 2 "
35
5 psi
37
53
48
81
102
17
24
24
30
38
(40)
(30)
10 psi
a
69
84
111
141
a
31
33
42
53
20 psi
a
a
106
147
193
a
a
43
56
72
2 psi
34
47
54
70
87
16
21
21
26
32
2"
47
5 psi
49
71
64
108
137
23
32
32
41
51
(50)
(40)
10 psi
a
92
113
149
190
a
42
44
56
71
20 psi
a
a
143
198
259
a
a
57
76
96
2 psi
56
77
89
114
143
25
34
34
43
53
21/ 2 "
77
5 psi
81
116
105
177
224
38
52
53
67
83
(65)
(66)
10 psi
a
151
185
243
311
a
69
72
92
116
20 psi
a
a
234
324
424
a
a
94
124
158
2 psi
76
104
120
154
193
34
46
46
58
71
3"
104
5 psi
109
157
141
239
303
51
70
71
90
112
(80)
(89)
10 psi
a
204
250
329
420
a
93
97
125
156
20 psi
a
a
316
438
572
a
a
127
167
213
2 psi
121
166
191
246
309
55
73
73
92
114
4"
166
5 psi
174
251
226
382
483
82
112
114
144
179
(100)
(142)
10 psi
a
325
398
525
671
a
149
155
199
249
20 psi
a
a
505
699
913
a
a
203
267
340
2 psi
176
242
278
358
450
80
107
107
135
166
5"
242
5 psi
254
365
329
557
704
120
163
166
210
261
(125)
(207)
10 psi
a
474
581
765
978
a
218
226
290
363
20 psi
a
a
736
1019
1331
a
a
295
390
496
2 psi
300
412
475
611
768
136
182
183
230
283
6"
413
5 psi
434
624
562
950
1202
204
278
282
358
446
(150)
(354)
10 psi
a
809
991
1305
1669
a
371
386
496
620
20 psi
a
a
1256
1739
2272
a
a
504
665
847
‡ 2 psi= 0.14 bar
5 psi= 0.35 bar
10 psi= 0.69 bar
20 psi= 1.38 bar
*Optional 25% or 50% reduced capacity ¾" (20 mm) plugs are available for unusually low loads if requested.
† –40F (–40°C) and –20F (–28.9°C) capacities are based on a two stage system.
For liquid overfeed evaporator suction between normal 2:1 to 5:1 rate, add 20% to the evaporator load or use the next larger port
size to accommodate liquid volume accompanying the suction gas and to reduce impact velocity.
Conditions: Capacities are based on the evaporator temperatures shown and +86F (+30°C) liquid. R717: For each 10F (5.6°C) lower
liquid temperature, increase the above table capacity by 3%. R22: For each 10F (5.6°C) lower liquid temperature, increase the above
table capacity by 5%. To convert for R134a, multiply the R22 table values by 0.73 (accuracy within 8%). For other refrigerant
capacities and suitability, contact the factory.
R429d
4
MAR 2002

LIQUID CAPACITIES (U.S. GPM)
APPLICATION: REFRIGERANT PUMP RELIEF
REGULATOR (HA4AL)
PORT SIZE
R717
R22
P= 30 psi
P= 30 psi
(mm)
(2 bar)
(2 bar)
3
/ 4 "
(20)
45
30
1"
(25)
82
56
1
1
/ 4 "
(32)
114
78
1
1
/ 2 "
(40)
256
168
2"
(50)
324
230
21/ 2 "
(65)
553
377
3"
(80)
733
505
Capacities assume no gas flashing. No capacity correction
required for temperatures between –40F (–40°C) and +40F
(+4.4°C).
OIL CAPACITIES (U.S. GPM)
APPLICATION: SCREW COMPRESSOR OIL
PUMP RELIEF REGULATOR (HA4AL)
PORT SIZE
OIL
P= 30 psi
(mm)
(2 bar)
3
/ 4 "
(20)
48
1"
(25)
87
11/ 4 "
(32)
122
11/ 2 "
(40)
260
2"
(50)
350
21/ 2 "
(65)
574
3"
(80)
775
Capacities based on oil with less than 300 SSU viscosity.
HOT GAS DEFROST NOMINAL VALVE SIZING CAPACITIES
(DEFROSTING EVAPORATOR SIZE TONS)
R EFRIG.
APPLICATION
PORT SIZE (mm)
3/4" (20)
1 " (25)
11/4" (32)
11/2" (40)
2 " (50)
21/2" (65)
Hot Gas Solenoid *
9 to 15
15 to 28
28 to 39
39 to 73
73 to 106
106 to 165
R717
Defrost Relief
17 to 24
24 to 45
45 to 60
60 to 96
96 to 140
140 to 225
Regulator
Hot Gas Solenoid *
6 to 8
8 to 15
15 to 20
20 to 32
32 to 47
47 to 75
R22
Defrost Relief
6 to 8
8 to 15
15 to 20
20 to 32
32 to 47
47 to 75
Regulator
*Or an outlet pressure regulator with electric shut-off (HA4AOS).
Evaporator tons at 10F (5.6°C) TD (temperature differential), valve capacities are conservative. These capacities can be modified up
or down depending on type of evaporator, temperature, mass, frost thickness, defrosting time, etc. Typical for –20F (–28.9°C)
evaporator.
GAS CAPACITIES (TONS)*
(1 Ton= 12,000 Btu/hr= 3.517 kW= 3042 kcal/hr)
DISCHARGE GAS REGULATOR
HOT GAS BY-PASS TO SUCTION
R 717
R 22
R 717
R22
SIZE
+86F (+30°C)
+86F (+30°C)
+86F (+30°C)
+15F (–9.4°C)
+86F (+30°C)
+15F (–9.4°C)
Condensing
Condensing
(mm)
+140F (+60°C)
+140F (+60°C)
Condensing
Condensing
Condensing
Condensing
Discharge
Discharge
+140F (+60°C)
+15F (–9.4°C)
+140F (+60°C)
+15F (–9.4°C)
2 psid
5 psid
2 psid
5 psid
Discharge
Discharge †
Discharge
Discharge †
3/4"**
(20)
17
27
6.1
9.5
88
27
32
12
1"
(25)
31
49
11
17
160
49
58
22
11/4" (32)
44
69
16
24
224
68
81
31
11/ 2 "
(40)
94
147
33
52
479
146
173
66
2"
(50)
126
197
45
70
643
196
232
89
2
1
/ 2 "
(65)
206
323
73
115
1054
321
380
146
3"
(80)
279
437
99
155
1424
434
513
197
4"
(100)
445
698
158
241
Hot gas bypass capacities are based on above given temperatures.
Liquid temperature is the same as condensing temperature.
5"
(125)
649
1017
230
361
Evaporator temperature +40F (+4.4°C) or less for +86F (+30°C)
6"
(150)
1108
1735
393
616
condensing; –22F (–30°C) evaporator for +15F (–9.4°C) condensing.
= Bypass from intermediate pressure at saturation temperature to booster suction.
*These capacities are not for hot gas defrost relief. See the chart in the middle of this page.
**Optional 25% and 50% reduced capacity ¾" (20 mm) plugs are available.
Discharge gas capacities are based on +15F (+10°C) evaporator temperature.
5
R429d
MAR 2002

CONTROL MODULES (PILOTS) FOR ANY REGULATOR
When installed, these control modules (pilots) enable
the main regulator to perform different control
functions (see page 3, Regulator Variations). Pilots are
normally factory installed, but can be retrofitted or
interchanged in the field. The nonrising stem can be
adjusted by using a ¼" wrench. Catalog
numbers are for the screw-on pilot module.
Interchangeable with Danfoss PM Series,
size permitting.
INLET PRESSURE
Opens as inlet pressure rises. Range: A, 0
to 150 psig (0 to 10 bar), Part 75-1097;
or B, 30 to 300 psig (2 to 21 bar), Part M3 75-1098.
Also, Range V, 20" to 130 psig
(–0.67 to +9 bar), Part 75-1099. Catalog M3.
Compact welded pressure pilot. Range A,
0 to 150 psig (0 to 10 bar), Part 75-1126.
Standard only on valve sizes ¾" to 1¼".
Catalog M3W.
M3W
OUTLET PRESSURE
Opens as outlet pressure drops. For hot
gas bypass to suction or for controlled
supply pressure of defrost hot gas. Also
used for compressor suction pressure
limiting (crankcase pressure regulator).
¼" NPT connections for outlet pressure
gauge and sensing line (tubing not
included). Range B, 30 to 300 psig (2 to
21 bar), Part 75-1101; or Range V, 20" to
130 psig (–0.67 to +9 bar), Part 75-1100.
M3O
Catalog M3O, specify range.
DIFFERENTIAL PRESSURE
Maintains set- for differential between
inlet and outlet or other pressure source.
For pump relief or any differential control.
¼" NPT connection for pressure
sensing line (tubing not included). Range
A, 0 to 150 psi (0 to 10 bar) difference,
Part 75-1081, Catalog M3L.
M3L
PNEUMATICALLY
COMPENSATED
Air or other pressure in the bonnet raises
inlet pressure on a 1:1 ratio. ¼" NPT
connection. Range A, 0 to 150 psig (0
to 10 bar), Part 75-1081, Catalog M3P. M3P
RESEATING RELIEF
Opens wide when pressure exceeds
pressure setting and repeatedly reseats
after operation. Defrost relief or high-
to-low system relief. Set and tagged. The
standard setting for ammonia defrost is
70 psig (4.8 bar). Range A, 0 to 150 psig
(0 to 10 bar), Part 75-1103; or Range B,
30 to 300 psig (+2 to 21 bar), Part Number
75-1104. Catalog M3K.
Compact welded pressure pilot. Range
A, 0 to 150 psig (0 to 10 bar), Part 75-1127.
M3K
Standard on valve sizes ¾" to 1¼".
Catalog M3KW.
SOLENOID
Normally closed. Opens wide when
energized. Requires coil. See page 2
for coil selection. Less coil: Part
70-1052, Catalog MS.
MS
ELECTRONICALLY
CONTROLLED
Mounted electronic actuator changes the
pressure set point in conjunction with a
controller and temperature sensor for
either air or liquid. Very precise. See page
12 for the control package which includes
the necessary controller and sensor.
Range: J1, 0 to 85 psig (0 to 6 bar), Part
27B1140; or J2, 25 to 115 psig (1.7 to 8 bar),
M3J
Part 27B1141. Catalog M3J.
TEMPERATURE OPERATED
Bulb opens the control module on
temperature rise to maintain a constant
temperature. Part 27B1110 with a range
of –40F to +30F (–40°C to 0°C) or Part
27B1111 with a range of +15F to +75F
(–10 to +25°C). Catalog M3T.
M3T
EXTERNAL CONNECTION
Enables a remote pressure source to be
introduced to the control via a pilot line
(replaces a pilot). ¼" NPT with separate
4" (100 mm) long weld nipple, Part
M3E25
35-1015, Catalog M3E25.
BLANKING PLUGS
To be used in a control module port when
the port is not utilized. Stopping plugs
have square head and are marked with
M3S
“0” (75-1063). Straight through flow plugs
have a hex head and are marked with
“1” (75-1064). Catalog M3S (stopping)
M3B
or M3B (straight through).
R429d
6
MAR 2002

MAIN REGULATORS ONLY (AR1, AR3)
Hansen regulators are normally furnished with control
¾" through 6"
¾" through 4"
modules (pilots) installed and tested (see page 3).
(20 mm through
(20 mm through
However, modular regulators less pilots and flanges
150 mm)
100 mm)
are available on order from ¾" to 6" (20 mm to
150 mm). Each AR1 and AR3 includes flange gaskets,
nuts and bolts, and a plugged ¼" FPT outlet pressure
access port. The access port is for connecting outlet
or differential control module sensing lines or gauges.
AR1 is the main regulator body with ONE control
module (pilot) port, control module not included.
AR3 is the main regulator body with THREE control
5" & 6"
module (pilot) ports, for a maximum of three control
modules, not included. The 5" and 6" (125 mm and
(125 mm and 150 mm)
150 mm) AR3 regulators have a single control module
port with connection points for up to three total ports
via mounted pilot piping.
TO ORDER: (Main Regulators only) Specify port size
and catalog number (AR1 or AR3).
AR1 AR3
OPERATION OF REGULATORS
The regulator adapter (top cover) is available with one
control module port or three control module ports. One
control module port is often used for a solenoid valve
or a single pressure regulator. Three control module
ports are often used for a dual regulator and other
multiple function variations.
When the modular regulator has three control module
ports, two are in series (SI and SII) and one is in parallel
(P) . Inlet pressure enters the internal equalization
passage and goes to both the P port and the SI port.
Inlet pressure enters the SII when the control module SI
port is open. When the control module in the SI and SII
port or the P port is open, pressure enters the space
above the piston which forces the main valve seat to
open and regulate flow.
7
R429d
MAR 2002

HA4A STANDARD REGULATOR
OPERATION
Inlet pressure is channeled through the internal
equalization passage to the inlet pressure control
module. The valve modulates open when inlet pressure
exceeds the pressure setting on the control module.
The gas or liquid passes through the inlet pressure
control module to enter the space on top of the piston,
which forces the main valve seat to open and regulate
flow. As inlet pressure increases, the main valve seat
opens further to maintain the selected inlet pressure. A
minimum pressure difference of 2 psi (0.14 bar) is
adequate to fully open the main valve. When inlet
pressure decreases below the pressure setting on the
control module, the closing spring will cause the main
valve seat to throttle closed.
ADJUSTMENT
Connect a pressure gauge via a gauge valve at the
gauge port on the regulator adapter. Set the control
module range spring at minimum force (control module
stem turned counterclockwise). Operate the
refrigeration compressor system and achieve
approximate desired suction pressure. Turn the control
module stem clockwise until a slight increase in inlet
pressure is detected by the gauge. The inlet pressure
setting can now be increased by turning the control
module stem clockwise or decreased by turning it
counterclockwise. The system should be allowed to
operate for a period of time before the final adjustment
is made. The inlet pressure control module is available
in Range A, 0 to 150 psig (0 to 10 bar); or Range B, 30
to 300 psig (2 to 21 bar). A vacuum Range V, 20" to 130
psig (–0.67 to +9 bar) is also available.
HA4AK RESEATING RELIEF
REGULATOR
OPERATION
(Same as HA4A) Inlet pressure is channeled through
the internal equalization passage to the reseating relief
control module. When inlet pressure exceeds the relief
setting, the control module opens wide to allow
pressure to enter the space on top of the piston. This
causes the main valve seat to open and relieve the inlet
pressure, provided the outlet pressure is at least 2 psi
(0.14 bar) lower. A 5 psid (.35 bar) closing spring is
standard on ¾" through 1¼" valves. See page 6 for
M3K pilot details.
When used for defrost relief from low side to an
intermediate pressure, a check valve on the outlet is
required to prevent back flow during refrigeration.
ADJUSTMENT
The control module is nonadjustable, factory-set and
sealed. Available in Range A, 0 to 150 psig (0 to 10 bar);
or Range B, 30 to 300 psig (2 to 21 bar).
HA4AL DIFFERENTIAL PRESSURE
REGULATOR
OPERATION
Inlet pressure is
channeled through the
internal equalization
passage to the
differential pressure
control module. Outlet
pressure (or other) is
introduced to the space
on top of the differential
pressure control module
diaphragm via an
external sensing tube. A
range spring on the top
of the control module
diaphragm allows the control of the differential
between inlet and outlet pressure. Increased range
spring force increases the differential setting. Inlet
pressure, counteracted by the range spring plus outlet
pressure, enters the space on top of the piston which
forces the main valve seat to open and regulate flow.
The external sensing tube on the 5" & 6" valves must
be customer supplied and field installed.
ADJUSTMENT
Connect a pressure gauge via a gauge valve at the
gauge port on the regulator adapter for the inlet
pressure reading. A pressure gauge downstream is
also required. With the control module range spring
force at the minimum (control module stem turned fully
counterclockwise, at this point pressure differential is
at minimum), slowly turn the control module stem
clockwise until the desired pressure difference
between the two gauges is achieved. A final adjustment
should be made after system has operated for a period
of time. The system must be capable of generating the
desired pressure difference for the regulator to open.
Range A, 0 to 150 psig (0 to 10 bar).
R429d
8
MAR 2002

HA4AO OUTLET PRESSURE
REGULATOR
OPERATION
Outlet pressure is
channeled through an
external sensing tube to
the outlet pressure control
module. The outlet
pressure is introduced to
the space under the
control module diaphragm.
When outlet pressure
decreases below the outlet
pressure setting
the range spring forces the
control module to
open further. As the control module opens, more inlet
pressure enters the space on top of the piston forcing
the main valve seat to open further and regulate flow.
As outlet pressure rises the control module reduces
the inlet pressure to the piston and the main valve seat
starts closing. The external sensing tube on the 5" & 6"
valves must be customer supplied and field installed. A
5 psid (.35 bar) closing spring is standard on ¾"
through 1¼" valves. A lighter spring is available for
applications where a low pressure drop is required,
such as holdback or crankcase pressure regulators.
ADJUSTMENT
Connect a pressure gauge via a gauge valve to the
outlet gauge port located on the outlet pressure control
module or the pipe after the regulator. With the control
module range spring at minimum force (control module
stem turned counterclockwise) operate the
refrigeration compressor. Turn the control module
stem clockwise until the desired outlet pressure is
achieved. Ranges available: B, 30 to 300 psig (2 to 21
bar); or vacuum range V, 20" to 130 psig (–0.67 to +9
bar).
HA4AB REGULATOR WITH ELECTRIC WIDE
OPENING
OPERATION
When the solenoid
control module is
de-energized, this
control operates in
the same manner as
the HA4A Standard
Regulator or other
pilot functions.
When energized,
inlet pressure
bypasses the
constant pressure
control module and enters the space on top of the
piston which forces the main valve seat to open wide to
permit flow in the direction of arrow.
ADJUSTMENT
With solenoid control module de- energized, follow
adjustment procedures for the HA4A Standard
Regulator. See page 10.
HA4AS REGULATOR WITH ELECTRIC SHUT-
OFF
OPERATION
When the solenoid
control module is
energized, this
control operates in
the same manner as
the HA4A Standard
Regulator or other
pilot functions. When
de-energized, valve
closes tight to stop
flow in direction of
arrow regardless of
pressure setting on
the control module.
ADJUSTMENT
Energize the solenoid control module and follow the
control module adjustment procedures for the HA4A
Standard Regulator. See page 10.
HA4AD DUAL PRESSURE
REGULATOR
OPERATION
When the solenoid
control module is
energized, this valve
operates in the same
manner as the HA4A
Standard Regulator
or other pilot
functions. When the
solenoid control
module is de-
energized, the inlet
pressure is chan-
neled to the higher-setting inlet pressure control
module and operates in the same manner as the HA4A
regulator. When inlet pressure rises above the higher
setting, the control module opens to allow inlet
pressure to enter the space on top of the piston which
forces the main valve seat to open and regulate flow.
Typically used as a combined evaporator pressure
regulator and defrost internal relief valve.
ADJUSTMENT
Connect a pressure gauge via a gauge valve at the
gauge port on the regulator adapter. With the solenoid
control module de-energized, adjust the constant
pressure control module in the P port for the high-
pressure setting. This may require a warm room or hot
gas supply to the evaporator. Then, energize the
solenoid control module located on the series SI port
and adjust the constant pressure module in the series
SII port for the low- pressure setting. For control
module adjustment, follow the adjustment procedures
for the HA4A Standard Regulator. See page 10.
9
R429d
MAR 2002

HA4AP PNEUMATICALLY
COMPENSATED REGULATOR
OPERATION
A pneumatic controller regulates the amount of air
pressure applied to the top of the M3P control module
diaphragm. A rise in temperature sensed by the
pneumatic controller reduces the air pressure to the
control module, allowing inlet pressure to enter the
space on top of the piston which forces the main valve
seat to open and regulate flow. A decrease in sensed
temperature increases the pressure of air to the M3P
control module. This increase in air pressure reduces
the opening at the M3P control module and restricts the
flow of inlet pressure to the piston, thus reducing the
opening at the valve main seat. See page 6 for M3P
pilot details.
ADJUSTMENT
Disconnect the air line to the M3P control module and
follow the adjustment procedures for the HA4A
Standard Regulator. See page 10. This sets the low
inlet pressure setting for the regulator. Connect the air
line back to the M3P control module. For every 1 psi
(0.069 bar) of increase in air pressure, the inlet
refrigerant pressure setting increases 1 psi (0.069 bar).
Adjust the controller as specified by the manufacturer.
In lieu of air, low- pressure refrigerant or other fluid can
be used for compensation. The differential between
inlet pressure and pressure to the M3P control module
must not exceed 45 psi (3.1 bar). Range A, 0 to 150 psig
(0 to 10 bar).
HA4AT TEMPERATURE
OPERATED REGULATOR
OPERATION
Temperature changes are detected by the thermal bulb.
The expansion or contraction of the charge inside the
bulb and capillary tube is transferred across the
diaphragm in the M3T control module. A rise in
temperature above the set-for temperature opens the
M3T control module and allows inlet pressure to enter
the space on top of the piston which forces the main
valve seat to open and regulate flow. A decrease in
temperature closes the M3T control module which
allows the piston to rise and close the main valve seat.
A reverse acting model is also available: rising
temperature closes the regulator, as for reheat. See
page 6 for M3T pilot details.
ADJUSTMENT
Connect a pressure gauge via a gauge valve at the
gauge port on the regulator adapter. Place a
thermometer in the cooled medium. With the system
operating, set the M3T regulator control module to the
desired temperature by turning the adjustment ring
clockwise to lower opening temperature or
counterclockwise to increase opening temperature.
One turn is equivalent to a change of approximately
11F (6.1°C). Tighten the locking ring after the final
adjustment has been made. Range –40F to +30F (–40°C
to 0°C); or +15F to +75F (–10°C to +25°C).
HA4AJ ELECTRONICALLY
CONTROLLED REGULATOR
OPERATION
The controller receives signals from an air or liquid
sensor and transmits an electrical voltage to the M3J
electronic actuator control module. An increase in
temperature lowers the voltage to actuator, opening the
regulator to increase flow. A decrease in sensor
temperature increases the voltage from the controller
to the M3J electronic actuator control module closing
the valve to reduce flow. This precision control can
maintain temperatures within 1F (0.5°C) of setting. The
M3J electronic actuator control module must be
operated by one of the control packages below.
See page 6 for M3J pilot details.
CONTROL PACKAGES
ECP This standard electronic control package
consists of a controller, controller base,
sensor, and transformer.
DDS This control package includes the standard
ECP components plus a digital temperature
readout, set-for/actual temperature switch
to easily check temperature, assembled and
mounted on a metal back plate. To display
the set-for temperature, simply depress and
hold the set-for/actual temperature switch.
When released, the digital readout will again
display the actual temperature at the sensor.
DDL Same as the DDS with a minimum evaporator
pressure adjustment. This adjustment sets
an evaporator pressure “floor” independent
of temperature. This is ideal to prevent too
cold of an evaporator surface in flooded
evaporators or during loading of critical,
temperature-sensitive products.
WTE2 Watertight controller enclosure for the above
“DD” series control packages. This industrial-
grade enclosure is polycarbonate with clear
gasketed cover.
EKA46 This computer interface is available for direct
connection of the electronic actuator control
module to a plant computer, PLC, or other
controlling device. Input to interface is a
regulated 4–20 mA or 0 to 10 volt signal from
an intelligent control device. The EKA46
package includes interface module and
transformer.
ADJUSTMENT
Set the desired temperature (REF) using both coarse
and fine adjustments. Set the alarm limits (LIM) on
deviation from the desired temperature, +1°C to +5°C.
Adjust the alarm delay timer (DEL) to delay alarm
release from 10 to 60 minutes. Both Proportional
amplification (Kp) and Integration time (Tn) are factory
set to 4. Consult the instruction manual or contact the
factory if adjustment is necessary. See the instructions
supplied with the EKA46 for its adjustment
recommendations. M3J electronic actuator control
module ranges: J1, 0 to 85 psig (0 to 6 bar); or J2, 25 to
115 psig (1.7 to 8 bar).
R429d
10
MAR 2002

HA4AM ELECTRIC MOTOR
COMPENSATED REGULATOR
OPERATION
The regulator pressure setting is altered as the motor
receives a signal from a suitable temperature
controller. The motor responds to maintain the balance
in the electrical circuit. The rotation of the motor is
transmitted through a cam, valve stem, and range
spring to the top of the control module diaphragm. An
increase in temperature decreases the range spring
force on top of the control module diaphragm. This
decrease in force on the diaphragm allows inlet
pressure to pass through the control module to enter
the space on top of the piston which forces the main
valve seat open to reduce the evaporator pressure. A
decrease in temperature causes an increase in the
range spring force. This restricts the flow of inlet
pressure to the piston causing a reduction in the
opening of the main valve seat, reducing regulator flow
by raising the pressure setting.
APPLICATIONS
This motor compensated regulator is popular for fruit
storage, precision air temperature control, and liquid
chiller control.
ADJUSTMENT
Adjust the temperature controller as specified by the
manufacturer. Fully open the regulator manually by
turning in (clockwise) the manual-opening stem to cool
the product or room. Once the temperature at the
sensing device is approximately as desired, adjust the
controller output so that the cam is rotated to the
center position. Put regulator back in automatic
operation by turning the manual-opening stem out
(counterclockwise). Loosen the adjustment locking nut.
See the diagram to the right. Turn the adjustment stem
clockwise to raise the inlet pressure setting or
counterclockwise to lower the inlet pressure setting.
When the desired refrigerant pressure setting is
achieved, tighten the adjustment locking nut. A final
adjustment should be made after the system has
operated for a period of time.
Using a potentiometer slide wire type of controller
(typically 135 ohm), depending on product heat load, a
deviation from desired temperature of about +2F to +5F
(+1.1°C to +2.8°C) is normal to rotate the regulator cam
for maximum load satisfaction. As the load is reduced
or as the temperature becomes lower, the cam rotates
to create a higher evaporator pressure just adequate to
balance the load and maintain the desired temperature,
usually with ±1°F (0.5°C). Other controllers are available
to operate the motor/cam rotation.
The basic Electric Motor Compensated Regulator
consists of a nonremovable control module with a
motor bracket and cam. The control module is available
in either Range A, 0 to 150 psig (0 to +10 bar); or Range
V, 20" to 130 psig (–0.67 to +9 bar). The motor bracket
comes mounted on the control module and is suitable
for use with either PENN (standard) or HONEYWELL
motors. Two cams are available: Low Rise (standard)
and High Rise. The table below indicates the pressure
change possible for each cam and motor combination.
PRESSURE CHANGE
R ANGE
CAM
P ENN
HONEYWELL
LOW
45 psig
(3.1 bar)
30 psig
(2.1 bar)
RISE
A or V
HIGH
90 psig
(6.2 bar)
60 psig
(4.1 bar)
RISE
The PENN motor (standard) has 270° of rotation travel
and the HONEYWELL motor has 160° of rotation travel.
Motors are available for either 135 ohm or 4–20 mA
control signal input and require 24 VAC power input.
Electric proportional thermostat controllers (135 ohm
output), electronic PID controllers (4–20 mA output)
with sensor, and 24V transformers are available
accessories.
11
R429d
MAR 2002

INSTALLATION DIMENSIONS (MM)
¾" THROUGH 1¼" REGULATORS 1½" THROUGH 4" REGULATORS
M = Additional length for close-coupled strainer
PORT SIZE
H1
H2
H3
H4
L
L 1
L 2
L 3
L 4
M
W*
(mm)
F PT,SW
WN,ODS
3
/ 4 ", 1", 1
1
/ 4 "
3.09"
6.77"
3.75"
4.63"
8.20"
8.94"
6.19"
2.38"
4.07"
7.20"
3.70"
4.50"
(20, 25, 32)
(78)
(172)
(95)
(117)
(208)
(227)
(157)
(60)
(103)
(183)
(94)
(114)
1
1
/ 2 ", 2"
2.87"
8.84"
4.90"
5.72"
12.39"
13.39"
9.88"
2.35"
4.04"
10.89"
9.83"
4.50"
(40, 50)
(73)
(225)
(124)
(145)
(315)
(340)
(251)
(60)
(103)
(277)
(250)
(114)
2
1
/ 2 "
3.62"
9.69"
5.57"
6.53"
13.01"
14.03"
9.88"
2.35"
4.04"
11.01"
9.83"
5.62"
(65)
(92)
(246)
(141)
(166)
(330)
(356)
(251)
(60)
(103)
(280)
(250)
(143)
3"
4.06"
10.00"
6.03"
6.88"
15.38"
16.40"
12.25"
2.35"
4.04"
13.38"
12.20"
6.50"
(80)
(103)
(254)
(153)
(175)
(391)
(417)
(311)
(60)
(103)
(340)
(310)
(165)
4"
4.69"
10.56"
6.58"
7.46"
17.01"
20.51"
14.12"
2.69"
4.38"
15.01"
14.07"
8.06"
(100)
(119)
(268)
(167)
(189)
(432)
(521)
(359)
(68)
(111)
(381)
(357)
(205)
*Maximum width of valve.
For ¾", 1", 1¼" valves add 3" (80 mm) to one side of the valve for external piping as found on HA4AO and HA4AL.
An alternate 4-bolt version of the 1¼" valve is available with face-to-face dimension (L1) same as R/S 1¼" for replacements.
“P” DIMENSION FOR CONTROL MODULES (MM)
C ATALOG
M 3
M 3W
M S
M 3O
M 3K
M 3KW
M 3L
M 3P
M 3J
M 3T
M 3E25
M3M
Size
6.5"
5.12"
3.25"
7.75"
6.5"
5.12"
6.5"
6.5"
4.63"
4.5"
1"
14.9"
(mm)
(165)
(130)
(83)
(197)
(165)
(130)
(165)
(165)
(118)
(114)
(25)
(378)
The above dimensions do not include seal cap and solenoid coil removal height, or motor-access clearance. M3E25 =
Less 4" (100 mm) long weld nipple. M3M = Electric motor compensated control module with motor.
R429d
12
MAR 2002

INSTALLATION DIMENSIONS (MM)
5" AND 6" REGULATORS
(See page 8.)
WELD END DIMENSIONS (MM)
P ORT SIZE
A
T
5"
5.05"
0.26"
(125)
(128)
(6.6)
6"
6.06"
0.28"
(150)
(154)
(7.1)
5" AND 6" PILOT PIPING (TOP VIEW)
FOR SERIES ARRANGEMENT (AS)
FOR SERIES AND PARALLEL ARRANGEMENT (AD)
SI, solenoid; SII pressure pilot
SI, solenoid; SII & P pressure pilots
13
R429d
MAR 2002

PARTS LIST CONTROL MODULES
M3, M3K, M3L, M3P
M3O
MS
I TEM
D ESCRIPTION
Q TY
PART NO
Diaphragm/Gasket Kit
75-1107
(M3, M3K, M3L, M3P)
Above Kit Consists of:
1
Diaphragm
1
75-0716
2
Lower Gasket (thick)
1
75-0426
3
Upper Gasket (thin)
1
75-0636
4
Follower O-ring
1
75-0337
5
Fiber Washer
1
75-0617
6
Lower Stem O-ring (green dot)
1
75-0520
7
Upper Stem O-ring
1
75-0521
8
Seal Cap O-ring
1
70-0011
* M3W and M3KW control modules are hermetically sealed,
welded assemblies having no replaceable internal parts. See
page 6 for replacement part numbers. Standard on ¾"–1¼"
(20–32 mm) valves.
I TEM
DESCRIPTION
QTY
PART NO
Diaphragm/Gasket Kit (M3O)
75-1108
Above Kit Consists of:
1
Diaphragm
1
75-0716
2
Lower Gasket (thick)
2
75-0426
3
Upper Gasket (thin)
1
75-0636
4
Follower O-ring
1
75-0337
5
Fiber Washer
1
75-0617
6
Lower Stem O-ring (green dot)
1
75-0520
7
Upper Stem O-ring
1
75-0521
8
Seal Cap O-ring
1
70-0011
9
Cartridge O-ring
1
75-0496
ITEM
DESCRIPTION
QTY
PART NO
Solenoid Tube/Plunger Kit (MS)
70-1059
Above Kit Consists of:
1
Coil Washer
1
70-0289
2
Coil Nut
1
70-0281
3
Plunger
1
70-0295
4
Solenoid Tube
1
70-0298
5
Solenoid Tube Gasket
1
70-0301
6
Tube Screws
4
70-0297
R429d
14
MAR 2002

PARTS LIST ¾" THROUGH 1¼" (20 MM THROUGH 32 MM)
ITEM
DESCRIPTION
QTY
PART NO
Piston Kit consists of:
75-1019
1
Piston
1
75-0191
2
Piston Seal
1
75-0353
4
Adapter Gasket
1
75-0489
20
Flange Gasket
2
70-0132
V-Port/Seat Kit ¾"*
75-1020
V-Port/Seat Kit 1"*
75-1021
V-Port/Seat Kit 1¼"*
75-1022
Above kits consist of:
3a
3/4" V-Port/Seat
1
75-0194
3b
1" V-Port/Seat
1
75-0193
3c
11/4" V-Port/Seat
1
75-0192
5
Closing Spring
1
75-0287
6
Bottom Cap O-ring
1
75-0183
*HA4AK AND HA4AO V-PORT/SEAT KITS
DESCRIPTION
PART NO
V-Port/Seat Kit 3/4"
75-1129
V-Port/Seat Kit 1"
75-1130
V-Port/Seat Kit 11/4"
75-1131
Above kits contain V-Port/Seat, bottom cap O-ring, and a 5
psid (.35 bar) closing spring (Part 75-0622). A lighter spring is
available (Part 75-0287).
ITEM
DESCRIPTION
QTY
PART NO
Gasket Kit consists of:
75-1023
4
....Adapter Gasket
1
75-0489
6
....Bottom Cap O-ring
1
75-0183
7
....Stem O-ring
1
70-0010
8
....Stem Washer
1
70-0026
9
....Stem Packing
1
70-0025
10
....Packing Nut
1
70-0019
13
....Seal Cap O-ring
1
70-0011
20
....Flange Gasket
2
70-0132
....Solenoid Tube Gasket
1
70-0301
....Port Gasket & O-ring
3
75-1071
11
Manual-Opening Stem
1
75-0164
12
Seal Cap
1
50-0411
14
Gauge Port Plug (1/4" NPT)
1
75-0189
15a
Adapter, 1 Port
1
75-0163
15b
Adapter, 3 Port
1
75-0162
16
Adapter Bolts, socket cap
4
75-0190
17
Bottom Cap
1
75-0155
18a
Body 3/4", 1"
1
75-0156
18b
Body 11/4", 2-Bolt
1
75-0154
19
Flange (Various)
2
FACTORY
21
Flange Bolt (5/8"-11x2.75")
4
70-0339
Flange Nut (5/8"-11)
4
70-0136
15
R429d
MAR 2002

PARTS LIST 1½" THROUGH 4" (40 MM THROUGH 100 MM)
ITEM
DESCRIPTION
QTY.
PART NO
Piston Kit 1½", 2"
75-1025
Piston Kit 2½"
75-1026
Piston Kit 3"
75-1027
Piston Kit 4"
75-1028
Above kits consist of:
1a
Piston 11/2", 2"
1
75-0168
1b
Piston 21/2"
1
75-0169
1c
Piston 3"
1
75-0159
1d
Piston 4"
1
75-0278
2a
Piston Seal 11/2", 2"
1
75-0292
2b
Piston Seal 21/2", 3"
1
75-0293
2c
Piston Seal 4"
1
75-0236
3a
Adapter Gasket 11/2", 2"
1
75-0113
3b
Adapter Gasket 21/2", 3"
1
75-0093
3c
Adapter Gasket 4"
1
75-0233
23a
Flange Gasket 11/2", 2"
2
75-0138
23b
Flange Gasket 21/2"
2
75-0125
23c
Flange Gasket 3"
2
75-0137
23d
Flange Gasket 4"
2
75-0253
V-Port/Seat Kit 1½"
75-1029
V-Port/Seat Kit 2"
75-1030
V-Port/Seat Kit 2½"
75-1031
V-Port/Seat Kit 3"
75-1032
V-Port/Seat Kit 4"
75-1033
Above kits consist of:
4a
V-Port/Seat 11/2"
1
75-0369
4b
V-Port/Seat 2"
1
75-0177
4c
V-Port/Seat 21/2"
1
75-0178
4d
V-Port/Seat 3"
1
75-0179
4e
V-Port/Seat 4"
1
75-0313
3a
Adapter Gasket 11/2", 2"
1
75-0113
3b
Adapter Gasket 21/2", 3"
1
75-0093
3c
Adapter Gasket 4"
1
75-0233
6a
Seat Seal O-ring 11/2", 2"
1
75-0274
6b
Seat Seal O-ring 21/2"
1
75-0275
6c
Seat Seal O-ring 3", 4"
1
75-0276
7
Seat Screw
1
75-0220
8a
Closing Spring 11/2", 2"
1
75-0171
8b
Closing Spring 21/2"
1
75-0201
8c
Closing Spring 3"
1
75-0248
8d
Closing Spring 4"
1
75-0235
5a
Seat Ring 11/2", 2"
1
75-0084
5b
Seat Ring 21/2"
1
75-0170
5c
Seat Ring 3"
1
75-0071
5d
Seat Ring 4"
1
75-0231
16a
Manual-Opening Stem
11/2" through 3"
1
75-0079
16b
Manual-Opening Stem 4"
1
75-0427
17a
Seal Cap 11/2" through 3"
1
75-0139
17b
Seal Cap 4"
1
50-0260
ITEM
DESCRIPTION
QTY
PART NO
Gasket Kit 1½", 2"
75-1039
Gasket Kit 2½"
75-1040
Gasket Kit 3"
75-1041
Gasket Kit 4"
75-1042
Above kits consist of:
3a
Adapter Gasket 11/2", 2"
1
75-0113
3b
Adapter Gasket 21/2", 3"
1
75-0093
3c
Adapter Gasket 4"
1
75-0233
6a
Seat Seal O-ring 11/2", 2"
1
75-0274
6b
Seat Seal O-ring 21/2"
1
75-0275
6c
Seat Seal O-ring 3", 4"
1
75-0276
9a
Back-Up Washer 11/2" through 3"
1
75-0245
9b
Back-Up Washer 4"
1
50-0351
10a
Stem O-ring 11/2" through 3"
1
50-0179
10b
Stem O-ring 4"
1
50-0253
11a
Stem Washer 11/2" through 3"
1
50-0046
11b
Stem Washer 4"
1
50-0247
12a
Stem Packing 11/2" through 3"
1
50-0045
12b
Stem Packing 4"
1
50-0248
13a
Packing Nut 11/2" through 3"
1
50-0013
13b
Packing Nut 4"
1
50-0251
14a
Seal Cap O-ring
1
50-0432
14b
Seal Cap Gasket
1
50-0270
15a
Stem Pin 11/2" through 3"
1
75-0173
15b
Stem Pin 4"
1
75-0434
23a
Flange Gasket 11/2", 2"
2
75-0138
23b
Flange Gasket 21/2"
2
75-0125
23c
Flange Gasket 3"
2
75-0137
23d
Flange Gasket 4"
2
75-0253
Solenoid Tube Gasket
1
70-0301
Port O-ring and Gasket
3
75-1071
18a
Adapter, 1 Port 11/2", 2"
1
75-0060
18b
Adapter, 3 Port 11/2", 2"
1
75-0384
18c
Adapter, 1 Port 21/2", 3"
1
75-0056
18d
Adapter, 3 Port 21/2", 3"
1
75-0493
18e
Adapter, 1 Port 4"
1
75-0334
18f
Adapter, 3 Port 4"
1
75-0801
19
Gauge Port Plug (1/4" NPT)
1
75-0189
20a
Adapter Bolts 11/2", 2"
4
75-0175
20b
Adapter Bolts 21/2", 3"
4
65-0057
20c
Adapter Bolts 4"
4
75-0291
21a
Body 11/2", 2"
1
75-0016
21b
Body 21/2"
1
75-0018
21c
Body 3"
1
75-0019
21d
Body 4"
1
75-0215
22
Flange (Various)
2
FACTORY
24a
Flange Bolt 11/2", 2"
8
70-0135
24b
Flange Bolt 21/2", 3"
8
75-0202
24c
Flange Bolt 4"
8
75-0279
25a
Flange Nut 11/2", 2" (5/8"-11)
8
70-0136
25b
Flange Nut 21/2", 3" (3/4"-10)
8
75-0210
25c
Flange Nut 4" (7/8"-9)
8
75-0280
R429d
16
MAR 2002

PARTS LIST 1½" THROUGH 4" (40 MM THROUGH 100 MM)
17
R429d
MAR 2002

PARTS LIST 5" AND 6" (125 MM AND 150 MM)
I TEM
D ESCRIPTION
Q TY
PART NO
Piston Kit
75-1110
Above Kit consists of:
1
Piston
1
75-0570
2
Piston Seal
1
75-0602
3
Adapter O-ring, Inner
1
75-0605
4
Adapter O-ring, Outer
1
75-0606
G asket Kit
75-1111
Above Kit consists of:
3
Adapter O-ring, Inner
1
75-0605
4
Adapter O-ring, Outer
1
75-0606
7
Seat Seal O-ring
1
75-0613
10
Back-up Washer
1
50-0324
11
Stem O-ring
1
50-0293
12
Stem Washer
1
50-0299
13
Stem Packing
1
50-0290
14
Packing Nut
1
50-0292
15
Seal Cap Gasket
1
50-0315
16
Manual-Opening Stem Pin
1
75-0607
Solenoid Tube Gasket
1
70-0301
Port O-ring and Gasket
3
75-1071
I TEM
D ESCRIPTION
Q TY
PART NO
V- Port/Seat Kit 5"
75-1112
V- Port/Seat Kit 6"
75-1113
Above Kits consist of:
5a
V-Port/Seat 5"
1
75-0640
5b
V-Port/Seat 6"
1
75-0641
3
Adapter O-ring, Inner
1
75-0605
4
Adapter O-ring, Outer
1
75-0606
7
Seat Seal O-ring
1
75-0613
8
Seat Screw (1/4"-20 x 1/2")
1
75-0220
9
Closing Spring
1
75-0601
6
Seat Ring
1
75-0558
17
Manual-Opening Stem
1
75-0581
18
Seal Cap
1
50-0304
19a
Adapter, 1 Port
1
75-0554
19b
Adapter (1 Port) with Plugged
Access Holes for Mutiple Pilots
1
75-0720
20
Gauge Port Plug
1
75-0189
21
Adapter Bolts
8
75-0604
22a
Body, 5"
1
75-0542
22b
Body, 6"
1
75-0541
R429d
18
MAR 2002

SERVICE AND MAINTENANCE
Failure to open: Wrong coil or control module pilot; low
line voltage; controlling switch or thermostat not
contacting; coil is burned -out; adjacent shut-off valve
closed; adapter gasket hole not aligned with hole in
body and adapter; dirt packed under Teflon seal ring
enabling excessive blow by; large quantity of dirt
particles in solenoid module passages; dirt blocking
internal pilot passages; main valve seat is dirt jammed.
Failure to close: Controlling switch or thermostat not
opening contacts; manual- opening stem is turned in;
valve installed in wrong direction; damage or dirt at
main valve seat or pilot seat; piston bleed hole
plugged. Under extreme conditions of liquid or oil
“slugging” or pressure drops exceeding 45 psi (3.1
bar), special construction may be required. Contact the
factory.
Before opening the regulator or disassembling the pilot
for service, be sure it is isolated
from the system and all refrigerant is removed (pumped
out to zero pressure). Follow usual refrigeration system
safe servicing procedures. Read the CAUTION section
of this bulletin on page 20.
To check solenoid pilot section of valve, disconnect the
electrical coil. Unscrew the coil nut and remove
washer. Lift coil housing away from valve. Remove the
four solenoid tube screws and remove solenoid tube
from valve. Inspect for dirt and damage to Teflon seat
and stainless steel pilot orifice. Clean, polish or replace
parts as necessary, then reassemble.
¾" through 1¼" (20 mm through 32 mm): Use a 3/8"
male hexagon wrench to loosen the four adapter bolts,
proceeding slowly to avoid refrigerant which may still
remain in the valve. If piston parts are stuck, remove
the 2" hex bottom cap in order to separate the valve V-
port/seat from the disc piston. Inspect disc and piston
bore for burrs, nicks, and other damage. Remove burrs
and nicks, clean or replace disc piston and Teflon seal
ring as necessary. Long- life seal on disc piston need
only be replaced when damaged or severely worn. If
replacing the disc piston seal, make sure the seal is
properly installed, with the edge up, and does not
“twist” during installation. Inspect V-port/seat and main
valve seat for nicks, marks, etc. The main valve seat
may be lapped by hand or power drill to remove marks.
Clean, polish or replace parts as necessary. If
necessary, the V-port tapered seat may be
reconditioned by removing up to 0.04" (1 mm) of Teflon
from it on a lathe. Lightly lubricate all parts and gaskets
with soft rag containing refrigerant oil. Align hole in
valve body, adapter gasket, and adapter to assure
proper operation. Reassemble valve. Carefully check
valve for leaks before returning it to service.
1½" through 6" (40 mm through 150 mm):
Loosen adapter bolts using a 12" adjustable wrench
(15" wrench for 5" and 6" valves), being careful to avoid
any refrigerant which may still remain in the valve. If
disc piston is difficult to remove, insert a ¼"-20
threaded screw (3/8"-16 for 5"& 6" valves) into center of
piston and lift straight -up. Inspect piston and piston
bore for burrs, nicks and other damage.
Remove burrs and nicks, clean or replace piston as
necessary. Long-life seal on disc piston need only be
replaced when damaged or severely worn. If replacing
the disc piston seal, make sure the seal is properly
installed, with the edge up, and does not “twist” during
installation. These valves also have a removable
stainless steel main valve seat. To remove seat ring for
inspection, first remove small hex head seat screw.
Turn the seat ring counterclockwise by turning it out
with a wrench and a steel bar tool positioned
horizontally or by carefully tapping the seat ring notch
with a punch and a hammer. Inspect the V-port/seat
and main valve seat for nicks, marks, and divots. The
main valve seat may be lapped by hand or power drill
to remove marks. Grease and replace the seat seal O-
ring. Clean and polish, or replace the parts as
necessary. If necessary, the V- port tapered seat may
be reconditioned by removing up to 0.04" (1 mm) of
Teflon from it on a lathe. Lightly lubricate all parts and
gaskets with a soft rag containing refrigerant oil. Align
the hole in the valve body, adapter gasket, and adapter
to assure proper operation. Reassemble the valve.
Carefully check the entire valve for leaks before
restoring it to service.
MANUAL OPENING
The manual-opening stem is designed to open the
valve, allowing upstream and downstream pressures to
equalize when needed for servicing, but not necessarily
to create a full-flow condition. The stem is located on
the top of the adapter cover. Slowly remove the seal
cap from the manual-opening stem, being cautious to
avoid any refrigerant which may have collected under
the cap. Using an appropriate wrench, turn the stem in
(clockwise) to open the valve manually;
counterclockwise to return the valve to automatic
operation. Do not leave the stem partially open because
it may be dynamically damaged.
ABBREVIATIONS
BW: Butt Weld end to match American Pipe
Schedule 40
CRN: Canadian Registration Number
CSA: Canadian Standards Association
Cv: Valve capacity factor GPM (U.S.) of water at 1 psi
differential
FPT: Female Pipe Thread, American National Standard
Kv: Valve capacity factor m3/hr of water at 1 bar
differential
mA: milliampere
MPT: Male Pipe Thread, American National Standard
NEMA: National Electrical Manufacturers
Association: Class 4, watertight, approximate
equivalent to IP65; Class 1, general purpose,
approximate equivalent to IP20
NPT: National Pipe Thread
ODS: Outside Diameter Sweat, for copper tubing
PLC: Programmable Logic Controller
psig: Pounds per square inch, gauge
R/S: Refrigerating Specialties Division, Parker
Hannifin Corp.
SPDT: Single Pole Double Throw
SW: Socket Weld to accommodate American and API
pipe WN or Weld: Weld Neck to match American Pipe
Schedule 40
19
R429d
MAR 2002

CAUTION
Hansen pressure regulators are only for refrigeration
systems. These instructions and related safety
precautions must be read completely and understood
before selecting, using, or servicing these valves. Only
knowledgeable, trained refrigeration technicians
should install, operate, or service these valves. Stated
temperature and pressure limits should not be
exceeded. Adapters, bottom cap, control modules, etc.,
should not be removed from valves unless system has
been evacuated to zero pressure. See also Safety
Precautions in the current List Price Bulletin and the
Safety Precautions Sheet supplied with the product.
Escaping refrigerant can cause injury, particularly to
the eyes and lungs.
WARRANTY
All Hansen Technologies products, except electric
motors and electronic items, are warranted against
defects in workmanship and materials for a period of
one year F.O.B. our plant. Electric motors and
electronic items are warranted against defects for 90
days. No consequential damages or field labor is
included.
REGULATOR ACCESSORIES
STRAINERS
Generous capacity, separate, close-coupled, 60
mesh (233 Micron Rating), accessible.
GAUGES
Pressure gauges have 3½" (90 mm) diameter faces,
safe plastic lenses, ¼" NPT connection, and
recalibration features. Available for ammonia and
halocarbon.
GAUGE VALVES
HGV1 “Long Neck” Gauge Valve, Seal Cap, ¼"
MPT x FPT.
PILOT LIGHTS
(specify voltage)
Pilot Light with NEMA 1 Box
(green, red, or amber light)
Watertight Pilot Light assembly with NEMA 4 box.
(green, red, or amber light)
CONVERSIONS
1" (inch) = 25.4 mm
1°F = 5/9°C
Temperature in °F = 1.8°C + 32
Temperature in °C = 5/9(°F –32) 1
psi = 0.06895 bar = 6.895 kPa
Cv (U.S. GPM) = Kv multiplied by 1.156
1 U.S. Gallon = 0.8327 Imperial Gallons = 3.7854
liters
1 U.S. GPM (gallons per minute) = 0.06309 dm3/s (or
L/s) = 0.227124 m3/hr
1 American Standard Commercial Ton of Refrigeration
= 12000 Btu/h = 3024 kcal/h = 3.517 kW
ORDERING INFORMATION, HA4A
MODULAR PRESSURE REGULATORS
FLANGE CONNECTION
PORT
STYLES & SIZES
SIZE
FPT, SW, WN
ODS
(mm)
STD
ALSO
STD
=
3
/ 4 "
(20)
3
/ 4 "
1", 1
1
/ 4 "
7
/ 8 "
1"
(25)
1"
3
/ 4 ", 1
1
/ 4 "
11/ 8 "
11/4" (32)
1
1
/ 4 "
3
/ 4 ", 1"
13/ 8 "
11/2" (40)
1
1
/ 2 "
2"
15/ 8 "
2"
(50)
2"
1
1
/ 2 "
21/ 8 "
21/ 2 "
(65)
2
1
/ 2 "
3"
25/ 8 "
3"
(80)
3"
—
31/ 8 "
4"
(100)
4"
—
41/ 8 "
5"
(125)
5" BW
—
—
6"
(150)
6" BW
—
—
5" & 6" are type HA4W with integral butt weld end only. 1¼" is
standard 2-bolt flange design; 4-bolt flange style available
upon request to field replace 1¼" R/S.
=25% and 50% Reduced Capacity Plugs are also available.
TO ORDER: Specify type, connection style and size,
range, voltage for coil, and close-coupled strainer if
required. The strainer is a separate stainless steel 60
mesh unit which usually connects directly to the
regulator inlet. Optional pilot lights are available in
green, red, and amber. Please specify color and voltage
when ordering the valve.
TYPICAL SPECIFICATIONS
“Refrigerant pressure regulators shall be pilot-
operated, with disc-type pistons having Teflon seals,
manual-opening stems, equipped with removable pilot
modules, Teflon main seats and stainless steel pilot
trim and optional, close- coupled inlet strainers, as
manufactured by Hansen Technologies Corporation or
approved equal.”
OTHER PRODUCTS
Small Pressure Regulators and Reliefs
Gauge, Purge, and Needle Valves
Shut-Off Valves
Hand Expansion Valves (Regulators)
Refrigerant Solenoid Valves
Refrigerant Check Valves
Gas-Powered Valves
Refrigerant Float Switches
Float Drain Regulators
Refrigerant Liquid Pumps
AUTO-PURGER®s
Vari-Level®Adjustable Level Controls
Techni-Level®Transducer Probes
Frost Master®Defrost Controllers
Pressure-Relief Valves
R429d
© 2004 Hansen Technologies Corporation
20
MAR 2002