Parker ADAPTOMODE Series Operating and installation instructions

Refrigerating Specialties Division 1
BULLETIN DN23-07B
Type A4AO-DN, A4AOE-DN,
A4AOS-DN, A4AOES-DN
January 2007
Installation and Service Information
ADAPTOMODE®OUTLET
PRESSURE REGULATORS
Types: A4AO-DN, A4AOE-DN,
A4AOS-DN and A4AOES-DN
Port Size 20 - 100 mm (3/4" - 4")
FOR AMMONIA, R-12, R-22, R-502
OTHER REFRIGERANTS AND OIL
FEATURES
• Pilot operated characterized Modulating Plug
precise control
• Suitable for all common refrigerants and oil
• 28bar (406 psig) design pressure (PS)
• Flanges for threaded or welded steel pipe and
copper tube (copper not for ammonia)
• Interchangeable parts
• Easy to service
• Close coupled strainers, optional
• Stainless Steel Diaphragm
• Stainless Steel Pilot Seat
• Manual Opening Stem
• Complies with Pressure Equipment Directive
97/23/EC
Description
These compact, heavy duty, pilot operated, Outlet Pressure regulators
are suitable for Ammonia, R-12, R-22,
R-502 and other common refrigerants and fluids approved for use in
refrigerant valves.
Purpose
Modulates flow of refrigerant gas or liquid to maintain a constant
downstream pressure as set-for, despite fluctuations in load.The regulator
will gradually close when downstream pressure begins to rise above the
setting and will gradually open when pressure begins to fall below the
setting. The regulator cannot maintain set-for pressure if uncontrolled
branch pipe lines feed into the main pipeline downstream of the A4AO
Regulator. Typical uses are as follows:
Protect Compressor Motor from Overload (Hold-back): See capacity
ratings in Condensed Catalog CC-11. Select at design parameters i.e.,
tons, evaporator temp./press and pressure drop.
Hot Gas Bypass Capacity Control: See Bulletin BYG-4, Condensed
Catalog CC-11.
Limit Refrigerant Pressure in a Liquid Line: Contact factory for selection
assistance.
Prevent Deep Vacuum in Booster Suction: See capacity ratings
Condensed Catalog CC-11 “Compressor Suction Loading”. For selections
other than those shown, contact factory.
Prevent Pressure Rise in Suction Main: Select valve based on mass
flow requirements.Valve Cv and pressure drop across regulator. Contact
factory for proper selection assistance, if required.
Hot Gas Defrost Control: Refer to Condensed Catalog CC-11 and
Bulletin 90-10 for ratings and application information.
All A4 Regulators are pilot operated using upstream pressure for the
opening force and requires a minimum 0.14 bar (2 psig) pressure drop
to fully open.
These valves are generally ordered with close coupled strainer to prevent
entrance of foreign material into the valve and the rest of the system.(See
current Bulletin DN00-10 for strainer information.)
The fluid temperature range for the A4 Series of Regulators is -45°C to
105°C (-50°F to 220°F).
ISO 9001 CERTIFIED
A4AO-DN A4AOS-DN
310215
PILOTPLUG

Refrigerating Specialties Division 2
Principles of Operation (See Fig. 1 & 1A)
The outlet pressure is sensed under the diaphragm through the sensing
tube, which is part of the Flange Ring-tube assembly. When the force
created by the outlet pressure acting under the diaphragm is less than the
force of the range spring, the pilot is open, allowing pressure to enter on
top of the piston. This causes the power piston to force the modulating
plug to open to maintain constant outlet pressure. Decrease in the outlet
pressure allows the range spring to open the pilot further, allowing more
pressure on top of the piston and opening the modulating plug further. An
increase in the outlet pressure will lift the diaphragm against the force of
the range spring, allowing the pilot plug to start closing. The pressure on
top of the power piston is decreased and the closing spring acts to reduce
the opening of the modulating plug and the flow of fluid through the
regulator.The pressure on top of the power piston is controlled by the flow
through the pilot seat and the bleed through a bleed hole in the power
piston and through the clearance between the piston and cylinder. A
minimum of 0.14 bar (2 PSIG) pressure drop across the regulator is
required to open it fully.
The A4AO Outlet Pressure Regulator therefore opens on a drop in the
outlet pressure below its set point and closes on a rise in outlet pressure
above its set point.The outlet pressure set point is not appreciably affected
by variations in the inlet pressure.
Manual Opening Stem
All Type A4A Regulators are provided with a manual opening stem. To
open the regulator manually, back the stem out (turn counterclockwise)
until it stops. To put the regulator into automatic operation, turn the stem
in (clockwise) until only the flats on the stem protrude from the packing
nut.
Adjustment
Install a pressure gauge at the regulator gauge port in the A4AO Adapter
next to the sensing tube. Back the adjusting stem all the way out to stop
(counterclockwise). This will reduce the set-point to its lowest level and
cause the valve to close. Operate the system until the outlet pressure is
lower-than desired. Slowly turn in the adjusting stem (clockwise) until the
desired outlet pressure is reached.
A4AO Outlet Pressure Setting Ranges
Approx. Pressure Change Factory Set Point
Set Point Ranges perTurn of (unless otherwise
Adjusting Screw specified)
V:500mm hg to 8.3 bar 1.7 bar (25 psi) 2.8 bar (40 psig)
(20in hg to 120 psig)
D:5.2 to 19.3 bar 3.7 bar (53 psi) 9.7 bar (140 psig)
(75 to 280 psig)
TYPE A4AOE (See Fig. 2)
Description
A4AOE Outlet Pressure Regulator,
Remote Sensing Connection
This regulator allows control of downstream pressure at a point remote
from the outlet of the regulator. The pressure from the desired sensing
point is connected directly to the A4AOE adapter at Fitting 7A in place of
the Flange Ring-tube Assembly 20 shown for the A4AO.Thus the regulator
will control the pressure at the sensing point.The regulator operation and
adjustment is the same as for A4AO.
Type A4AOS (See Figs. 2, 3, and 4)
Description
A4AOS Outlet Pressure Regulator
With Electric Shut-Off
The A4AOS Pressure Regulator controls outlet pressure when the modular
solenoid is energized, and closes when the solenoid pilot is de-energized
regardless of the pressure setting or pressure in the regulator. The
Modudapter (Fig. 2, item 28A) is used only with the A4AOS. The Pilot
Solenoid is mounted on Pad #1 of the Modudapter along with Moduplate,
item #52, mounted on Pad #2 with “S” showing to the outside of the
regulator.
Adjustment: With the solenoid energized, proceed as with the A4AO.
Installation
All regulators are packed for maximum protection.Unpack carefully. Check
the carton to make sure all flanges and other items are unpacked. Save
the enclosed instructions for the installer and eventual user.
Do not remove the protective coverings from the inlet and outlet of the
regulator until the regulator is ready to be installed. Protect the inside of
the regulator from moisture, dirt and chips before and during installation.
When welded or brazed flange connections are used, all slag, scale and
loose particles should be removed from the flange interior before the
regulator is installed between the flanges. It is advisable to install a
close-coupled companion strainer (RSF) at the inlet of the regulator to
help protect it from any foreign material in the system.
The A4A series of regulators will give optimum performance if mounted in
a horizontal line in a vertical position with the manual opening stem on
bottom.Where other positions are desired, the factory should be consulted,
please give application and piping details.The regulator must be installed
with the arrow on the valve body pointing in the direction of the fluid flow
for the regulator to function properly. Backward flow through the regulator
is uncontrolled and will vary with the valve model and the reverse pressure
drop encountered. The regulator is not a check valve.
Tighten the flange bolts and nuts evenly to provide proper seating of the
flange gasket and to avoid damage to gaskets or flanges. (See Flange
BoltTorque Table, page 12).Avoid using the regulator flange bolts to stretch
or align pipe. Even the heavy duty semi-steel body of an A4A can be
distorted, causing the precision parts to bind.
The regulator should be installed in a location where it is easily accessible
for adjustment and maintenance. The location should be such that the
regulator cannot be easily damaged by material handling equipment.When
it is necessary to insulate the regulator (and companion strainer), the
insulation should be installed to provide access to the regulator (and
companion strainer) for adjustment and maintenance. Do not insulate the
solenoid coil and coil housing. Proper indicating gauges should be installed
to be easily visible to the operating engineer for system checking and
adjusting purposes.
Disassembly and Assembly
Refer to Figs. 2, 3 and 4 in this section.
Before disassembling any A4A type regulator, read the information in this
bulletin and Bulletin RSBCV, Safety Procedures for Refrigerating
Specialties Division Refrigeration Control Valves.
Before a regulator is removed from the line or disassembled in the line,
make sure that all refrigerant has been removed from the regulator,
including the bonnet where applicable, and the close coupled strainer.
The regulator must be isolated from the rest of the system in a safe manner.
When pumping down to remove the refrigerant, the manual opening stem
33A must be turned out (counterclockwise) to make sure the valve is open.
All A4A Regulators General Procedure
The construction of the regulator and the method of disassembly are
relatively simple, but some procedures must be followed to avoid damage.
The following describes the procedure for the basic A4A; special
instructions for other types are included in other appropriate sections.

Refrigerating Specialties Division 3
Disassembly and Assembly
Disassembly - Take care when removing Seal Caps 1 and 44 in case
some refrigerant may be trapped inside. Back the Adjusting Stem 6 all the
way out to remove any pressure from Range Spring 13 otherwise damage
to Diaphragm 17 or Pilot Seat 18 may occur.Remove Bonnet 8 by carefully
removing Cap Screws 11. Take care not to damage Diaphragm Follower
15. Remove Adapter 28 by removing Cap Screws 31. Turn the Manual
Opening Stem 33A all the way in until the flats on the stem barely protrude
from the stuffing box nut. Push Piston 30 down against the spring force.
The piston should move freely down and be returned by the spring force.
If the piston is jammed or sticky, remove Bottom Cap Assembly which
includes Items 33 through 42 by removing Cap Screws 39 or unscrewing
Bottom Cap, 20mm through 32mm (3/4" through 1-1/4"). Using a hard
wood dowel rod inserted through the bottom of the valve, tap the piston
upward and out. Thoroughly clean all parts. If jamming has taken place
and the piston and bore are scored, remove all burrs by polishing the
piston, bore and modulating plug with fine crocus cloth. Inspect the seating
area of the Modulating Plug 33 for damage or erosion.If damaged it should
be replaced. It would be advisable to replace the entire bottom cap
assembly. Inspect all gaskets and“O”rings for damage and replace where
necessary.
Assembly - When reassembling the valve, all internal parts should be
clean, dry and lightly oiled with refrigerant oil, except “O” rings. Apply
silicone grease to the “O” rings. Care must be taken especially when the
parts are cold since moisture can condense on parts and cause rapid
rusting. When replacing gaskets, they should be oiled very lightly with
refrigerant oil before assembly.Install bottom cap assembly first and tighten
in place. Carefully replace the piston; never try to force it in place. Align
the Adapter Gasket 29 carefully with the proper holes in the adapter
and valve body and fasten adapter in place. Before assembling the
bonnet be sure the Adjusting Stem 6 is turned all the way out and that
the Bonnet 8 and Diaphragm Follower 15 are properly aligned, otherwise
damage to the diaphragm and pilot seat may occur. Place Gasket 19 in
the adapter and align Gasket 16 and Diaphragm 17 to the center of the
bonnet. The raised center of the diaphragm must be towards the bonnet.
For range “D” use two diaphragms. Tighten Cap Screws 11 evenly. The
ideal tightening torque is 1.5 Kg-m (11 ft. lbs.). Valve is now ready to be
adjusted for normal operation.
If close coupled strainer is used, it may be cleaned before putting the
valve back in operation. The regulator must be tested for leaks with
refrigerant gas or other appropriate gas before the system is put into
operation.
Basic Modules (Used on A4AOS/A4AOSE)
Disassembly and Assembly
Refer to exploded views (Figs. 3 and 4), illustrating the Modular Solenoid
Pilot and Moduplate. These modules are used only with the A4AOS/
A4AOSE Outlet Pressure Regulator with Electric Shut Off. The
Modudapter, Item #28 (Fig. 2) accommodates these modules. The Pilot
Solenoid is mounted on Pad #1 of the Modudapter along with the
Moduplate, item #52, mounted on Pad #2 with the “S” showing to the
outside of the regulator.
Before disassembling and assembling any modules, refer to page 2 of
this bulletin and to Bulletin RSB, Safety Procedure for Refrigerating
Specialties Division Refrigeration Control Valves.
A4AO, A4AOE
Fig. 2 A4A0S & A4AOSE
Note: 28 Adapter, 52 Moduplate used only with A4AOS/A4AOSE
Fig. 3

Refrigerating Specialties Division 4
Disassembly and Assembly (continued)
Modudapter (See Figs. 1, 2 and 3)
The Modudapter 28 will accommodate the Modular Pilot Solenoid and
Moduplate. When assembling make sure the Modudapter gauge port is
directly lined up with the inlet of the regulator. Passage N must
communicate upstream pressure through the hole in the Adapter Gasket
29 as well as into Modudapter 28 and thence to the pilot modules. It is
imperative that proper alignment oftheseitemsbe made to assure regulator
function.
Before disassembly, make sure all refrigerant has been removed from the
regulator and strainer, if used.
Protect the surfaces of Pads 1 and 2 of the Modudapter at all times since
these surfaces determine the sealing tightness of the “O” Rings.
S6A Modular Solenoid Pilot (Fig. 4)
This solenoid pilot is mounted on Pad 1. Before working on any solenoid
pilot, make sure the coil is de-energized and will remain so during the
servicing period. Refer to page 10 for Repair Parts Kit details of S6A
Solenoid Pilot.
Disassembly (Fig. 4) - Remove Coil Housing Screw 55 and pull entire
Coil and Housing Assembly, 56 through 60, upward and off of Bonnet
Tube Assembly 61. Carefully remove Bonnet-Tube Assembly. Lift out
Plunger-Needle Assembly 63, avoid damaging the needle. Remove Seat
Assembly 64 by using a 7/16" (11 mm) socket wrench. Inspect all parts,
clean or replace as needed.
Assembly (Fig. 4) - Reinstall the Seat Assembly and tighten (no gasket
needed).Carefully insert the Plunger NeedleAssembly.Replace the Gasket
62 and re-install Bonnet-Tube Assembly. Replace entire Coil and Housing
Assembly and tighten Coil Housing Screw.
Make sure the solenoid coil is of the proper voltage and frequency.
When mounting the solenoid pilot, place the “O” Rings 50 into the proper
grooves and tighten the Cap Screws 66, evenly.The ideal tightening torque
is 1.1 kg-m (8 ft. lbs.).
Moduplate (Fig. 2)
The Moduplate Item #52 is used to stop the flow through the flow path of
the Modudapter. Protect the“O” Ring surfaces at all times.When mounting
the Moduplate, place“O” Rings 50 into the grooves (lubricate with silicone
grease) and tighten the Cap Screws 53 evenly to avoid distortion and
assure proper sealing.The ideal tightening torque is 1.1 Kg-m (8 ft. lbs.).
Maintenance and Service
General Procedure:
Before disassembly of regulator, make certain that all refrigerant has been
removed (pumped out) from the regulator and its companion strainer where
one is used. Read Safety Bulletin RSBCV.
Dirt in the system is the greatest single cause of regulator malfunction.All
screens or filters must be cleaned or replaced when they become dirty. At
start up it is especially important that these items are cleaned or changed
frequently. When the RSF close-coupled companion strainers are used,
maintain according to instructions in Bulletin DN00-10. Moisture in
halocarbon systems in particular can cause corrosion or form ice, causing
the piston to freeze in position. Filter-driers should be used and maintained
for halocarbon systems.
Before deciding to disassemble a regulator for servicing, the following
investigations should be made:
Check the manual opening stem; it should be turned in for automatic
operation.
Check the regulator setting to make sure it is properly adjusted. Turn
adjusting screw slowly to see if regulator responds. Check regulator
pressure range; if wrong, range spring must be replaced.
Check other system components for proper operation. Make sure that the
regulator receives the proper electrical signal where modular pilot solenoids
are used. Make sure they are same as the power supply.
Check hand valves in the system to make sure they are open or closed as
required and the system is receiving liquid or gas as the case may be.
Maintenance and Service (continued)
Electrical
The Refrigerating Specialties Division molded water resistance Class “B”
solenoid coil is designed for long life and powerful opening force. The
standard coil housing meets NEMA 3R and 4 requirements. This sealed
construction can withstand direct contact with moisture and ice. The coil
housing far exceeds the requirements of NEMA Standard ICS, 1-110.57
salt spray test for rust resistance.
By definition, Class “B” coil construction will permit coil temperatures as
measured by resistance method, as high as 130°C (266°F). Final coil
temperatures are a function of both fluid and ambient temperatures. The
higher fluid temperatures require lower ambient temperatures so the
maximum coil temperature is not exceeded. Conversely, low fluid
temperatures permit higher ambient temperatures.
The supply circuits must be properly sized to give adequate voltage at
the coil leads even when other electrical equipment is operating. The
coil is designed to operate with line voltage from 85% to 110% of rated
coil voltage. Operating with a line voltage above or below these limits may
result in coil burnout. Also, operating with line voltage below the limit will
definitely result in lowering the valve opening pressure differential. Power
consumption during normal operation will be 33 Watts or less.
Inrush and running current is listed below:
Inrush Running Fuse
Standard Coil Current Current Size
Volts/Hertz (Amps) (Amps) (Amps)
120/60 (Blue leads) 1.18 0.46 1
208/60 (Blue & Red leads) 0.63 0.26 1
240/60 (Red leads) 0.60 0.23 1
440/60 (Yellow & Red leads) 0.39 0.13 1
115/50 (Yellow & Blue leads) 1.22 0.21 1
230/50 (Yellow leads) 0.65 0.26 1
Other (Contact Factory)
On transformer coil the 6 volt leads are always black.
S6A MODULAR SOLENOID PILOT
(For A4OS / A4AOES)
Port Sizes 20 - 100mm (¾” - 4”)
Fig. 4
69 68
67
58
70
71

Refrigerating Specialties Division 5
SERVICE POINTERS (Check General Procedure)
SYMPTOM PROBABLE REASON CORRECTION
Regulator does not
shut off flow. Diaphragm or seat dirty, damaged or frozen. Clean or replace. Clean strainer.
Diaphragm follower stuck or damaged. Clean or replace.Install follower carefully.
Piston jammed with excess dirt. Remove and polish piston and bore with crocus cloth. Clean valve and strainer.
Modulating plug leaking due to excess dirt Clean or replace.If used on liquid, check for erosion due to excessive
or damage. flash gas.Reduce flash gas by subcooling or by reducing pressure
drop across valve by providing restriction at valve outlet.
Diaphragm ruptured or badlydeformed. Replace.If Range "D" make sure has 2 diaphragms.
A4AOS/A4AOSE Modular Solenoid Pilot
Seat leaking. Check seat and needle.Replace as needed.
Diaphragm and seat eroded due to flash gas. Replace.Reduce flash gas by subcooling or by reducing pressure
drop across regulator by providing restriction at valve outlet.
Modular Solenoid Pilot not closing. Check power at leads, make sure coil is de-energized.
Regulator does not Pressure Regulator Diaphragm Replace. If Range D make sure has 2
open. ruptured or badly deformed. diaphragms.
Diaphragm follower stuck, damaged Clean or replace.
or frozen. Install follower carefully.
A4AOS/A4AOSE Modular Solenoid Pressure drop across valve too high; over 21 bar (300 psig). Lower
Pilot not opening. pressure drop. Improper power supply. Correct. Replace solenoid coil.
Piston worn, too much clearance. Replace piston. Check for reason. If used on liquid, check for flash gas.
Piston jammed with excess dirt. Remove and polish piston and bore with crocus cloth.
Clean valve and strainer.
Regulator Operation Diaphragm or seat dirty
erratic. or damaged. Clean or replace. Clean strainer.
Diaphragm follower has dirt on the outside
diameter or outside diameter is damaged. Clean or replace.
Other system components, line controllers,
thermostats, etc., erratic. Adjust, repair or replace.
Regulator too far oversized. Check load. Replace with smaller regulator or investigate use of
reduced capacity plug.
Pressure drop across Inlet or outlet restricted. Check for restriction.
regulator too high. Clean strainer.
Regulator too small. Open manually to be sure valve is full open.
Replace with proper size regulator.
Large amount of flash gas in liquid line. Reduce flash gas by subcooling. Reduce line restriction by increasing line
size, particularly at the regulator outlet. Replace with larger regulator.
High pressure drop causes high rate of
expansion gas at regulator outlet. Increase pipe size at the outlet of the regulator.
Regulator does not open all the way. Check piston for wear. Replace, if needed.

Refrigerating Specialties Division 6
Item Description
1 Seal Cap
2 Gasket, Seal Cap
3 Nut, Stuffing Box
4 Packing Ring
5 Packing Washer
6 Adjusting Stem
7 Fitting, Bonnet
8 Bonnet
9 Nameplate
10 Screw, Name Plate
11 Screw, Bonnet
12 Spring Rest, Upper
13 Spring, Range
14 Spring Rest, Lower
15 Diaphragm Follower
16 Gasket, Bonnet
17 Diaphragm
18 Seat, Pilot
19 Gasket, Adapter
20 Flg Ring-tube Asm
21 Adapter, A4AO
22 Spring Nut
23 Spring, Pilot Plug
24 Pilot Plug
25 O-Ring Seal
26 O-Ring, Pilot Plug
27 Gauge Port Pipe Plug
28 Adapter, Body
29 Gasket, Body
30 Piston-Stem
31 Screw, Body
32 Body
33 Throttling Plug Asm
34 Spring, Closing
35 Dirt Wiper Retainer
36 Dirt Wiper
37 Seal, Bottom Cap
38 Bottom Cap
39 Screw, Bottom Cap
40 Packing Washer
41 Packing Ring
42 Stuffing Box Nut
43 Gasket, Seal Cap
44 Seal Cap
45 Gasket, Flange
46 Bolt, Flange
47 Nut, Flange
48 Pilot Body
49 Screw, Pilot Body
50 O-Ring
51 Modudapter
52 Moduplate
53 Screw, Moduplate
54 O-Ring (Large)
58 Coil Assembly
61 Bonnet-Tube Asm
62 Tube Gasket
63 Plunger-Needle Asm
64 Seat Asm
65 Solenoid Pilot Body
66 Screw, Solenoid Pilot
67 O-Ring
68 Knob
69 Lens
70 Bulb
71 O-Ring
A4A0S & A4AOSE
Note: 28 Adapter, 52 Moduplate used only with A4AOS/A4AOSE
Fig. 3
For replacement parts and prices, consult
PARTS KITS LIST PRICE SCHEDULE INDUSTRIAL AND FLO-CON (PK)

Refrigerating Specialties Division 7
TABLE OF DIMENSIONS FOR INLET PRESSURETypes A4AO, A4AOE, A4AOS, A4AOSE
TYPE 20mm & 25mm 32mm 40mm & 50mm 65mm 75mm 100mm
(3/4 & 1 ") (1-1/4") (1-5/8 & 2") (2-1/2") (3") (4")
DIMENSIONS mm inches mm inches mm inches mm inches mm inches mm inches
A454 17.9 472 18.6 525 20.7 538 21.2 657 25.9 710 28.4
B148 5.8 162 6.3 177 6.9 181 7.1 273 10.7 292 11.5
C177 6.7 216 8.5 264 10.4 264 10.4 324 12.7 352 14.6
D1/2" 229 9.0 1-1/4" 269 10.6
(FPT) FOR 3/4" 229 9.0 1-1/2" 320 12.6 2-1/2" 344 13.5 3" 402 15.8 4" 463 18.2
PIPE SIZES 1" 229 9.0 1-1/2" 269 10.6
SHOWN 1-1/4" 229 9.0
E1/2" 229 9.0 1-1/4" 269 10.6 1-1/2" 320 12.6
(S.W.)FOR 3/4" 229 9.0 2-1/2" 344 13.5 3" 402 15.8 4" 463 18.2
PIPE SIZES 1" 229 9.0 1-1/2" 269 10.6 2" 320 12.6
SHOWN 1-1/4" 229 9.0
F
(W.N.) FOR 3/4" 267 10.5 1-1/4" 313 12.3 1-1/2" 377 14.8 2-1/2" 414 16.1 3' 491 19.3 4" 584 23.0
PIPE SIZES 1" 274 10.8 1-1/2" 317 12.5 2" 384 15.1
SHOWN 1-1/4" 274 10.0
G7/8" 252 9.9 2-5/8" 361 14.2 3-1/8" 427 16.8
(O.D.S.) FOR 1-1/8" 252 9.9 1-3/8" 282 11.1 1-5/8" 371 14.6
TUBE SIZES 1-3/8" 244 9.6 1-5/8" 292 11.5 2-1/8" 351 13.8 4-1/8" 516 20.3
SHOWN 1-5/8" 252 9.9 2-1/8" 318 12.5 2-5/8" 371 14.6 3-1/8" 402 15.8 3-5/8" 445 17.5
H117 4.6 117 4.6 140 5.5 159 6.2 178 7.0 222 8.8
J98 3.9 178 7.0 251 9.9 314 12.4 314 12.4 363 14.3
K112 4.4 112 4.4 117 4.6 124 4.9 142 5.6 157 6.2
L122 4.8 122 4.8 135 5.3 133 5.2 122 4.8 152 6.0
A4AO, A4AOE
A4AOS, A4AOSE
H
F
G
WELD NECK
FLANGE
ODS SOLDER
FLANGE
B
C
D
E
J
ADD FOR
STRAINER
SUBTRACT 13mm
1/2" FOR OE
(FPT FLANGES)
(SW FLANGES)
ALLOW 25mm (1")
BELOW VALVE TO OPERATE
MANUAL OPENING STEM
ALLOW 75mm (3") ABOVE VALVE
TO OPERATE ADJUSTING STEM
ALLOW 75mm (3") ABOVE VALVE
TO OPERATE ADJUSTING STEM
WELD NECK
FLANGE
ODS SOLDER
FLANGE
G
F
H
L
KA
J
D
E
B
C
ADD FOR
STRAINER
(FPT FLANGES)
(SW FLANGES)
SUBTRACT 13mm
1/2" FOR OES ALLOW 25mm (1")
BELOW VALVE TO OPERATE
MANUAL OPENING STEM
Flange BoltTorque Requirements
Bolt Diameter Valve Port Size Torque
11mm(7/16") 13mm (1/2") 3.9 mkg (28 ft lb)
16mm(5/8") 20-50mm (3/4 "-2") 11.8 mkg (85 ft lb)
19mm(3/4") 65-75mm (2-1/2 "-3") 14.5 mkg (105 ft lb)
22mm(7/8") 100mm(4") 22.1 mkg (150 ft lb)

Parker Hannifin Corporation • Refrigerating Specialties Division
2445 South 25th Avenue • Broadview, IL 60155-3891
Telephone: [phone] • Fax [phone]
8
Safe Operation (See also Bulletin RSBCV)
People doing any work on a refrigeration system must be qualified and
completely familiar with the system and the Refrigerating Specialties
Division valves involved, or all other precautions will be meaningless.This
includes reading and understanding pertinent Refrigerating Specialties
Division product Bulletins, and Safety Bulletin RSB prior to installation or
servicing work.
Where cold refrigerant liquid lines are used, it is necessary that certain
precautions be taken to avoid damage which could result from liquid
expansion. Temperature increase in a piping section full of solid liquid will
cause high pressure due to the expanding liquid which can possibly rupture
a gasket, pipe or valve. All hand valves isolating such sections should be
marked, warning against accidental closing, and must not be closed until
the liquid is removed. Check valves must never be installed upstream of
solenoid valves, or regulators with electric shutoff, nor should hand valves
upstream of solenoid valves or downstream of check valves be closed
until the liquid has been removed. It is advisable to properly install relief
devices in any section where liquid expansion could take place.
Avoid all piping or control arrangements which might produce thermal or
pressure shock.
For the protection of people and products, all refrigerant must be removed
from the section to be worked on before a valve, strainer, or other device
is opened or removed.
Flanges with ODS connections are not suitable for ammonia service.
Warranty
All Refrigerating Specialties Products are warranted against defect in
workmanship and materials for a period of one year from date of shipment
from factory. This warranty is in force only when products are properly
installed, field assembled, maintained and operated in use and service as
specifically stated in Refrigerating Specialties Catalogs or Bulletins for
normal refrigeration applications, unless otherwise approved in writing by
Refrigerating Specialties Division. Defective products, or parts thereof,
returned to the factory with transportation charges prepaid and found to
be defective by factory inspection will be replaced or repaired at
Refrigerating Specialties’ option, free of charge, F.O.B. factory. Warranty
does not cover products which have been altered or repaired in the field;
damaged intransit, or have suffered accidents, misuse, or abuse.Products
disabled by dirt, or other foreign substances will not be considered
defective.
THE EXPRESS WARRANTY SET FORTH ABOVE CONSTITUTES THE
ONLY WARRANTY APPLICABLE TO REFRIGERATING SPECIALTIES
PRODUCTS, AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, WRITTEN OR ORAL, INCLUDING ANY
WARRANTY OR MERCHANTABILITY, OR FITNESS FOR A PARTICULAR
PURPOSE. No employee, agent, dealer or other person is authorized to
give any warranties on behalf of Refrigerating Specialties, nor to assume,
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its products.
A4A BOLT-ON ADAPTER 1-1/4" TO 4"
Size COMPONENT DESCRIPTION MATERIAL
1-1/4" - 4" BOLT, ON ADAPTER 1-1/4 DN - 4 DN DUCTILE IRON GGG 40.3
32 mm - 100mm MODUPLATE AISI 1117 CRS
S6A SOLENOID
COMPONENT DESCRIPTION MATERIAL
BODY, S6A DN AISI SS 304 BARSTOCK
SLEEVE, SOLENOID TUBE AISI 1117 CRS BARSTOCK
TUBE SOLENOID, S6 SS TUBING 304
A2D PILOT REGULATOR
COMPONENT DESCRIPTION MATERIAL
BODY, A2D DN DUCTILE IRON GGG 40.3
BONNET, A4W DUCTILE IRON GGG 40.3
PRESSURE CONTAINING COMPONENTS A4A DN LINE: 3/4" & 1"
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, A4A DN ASTM A-126 CLASS B 6.2
ADAPTER, A4A DN ASTM A-126 CLASS B &
COVER BOTTOM, A4A/S4A BARSTOCK ASTM 1213 CR 8.6
BONNET A4W ASTM A-126 CLASS B
BODY,S6A (REGULAR MATL) DUCTILE IRON ASTM A536
TUBE SOLENOID, S6 SS TUBING 304
SLEEVE, SOLENOID TUBE AISI 1117 CRS BARSTOCK
BODY, A2D DN ASTM A-126 CLASS B
PRESSURE CONTAINING COMPONENTS A4A DN LINE: 1-1/4 TO 4
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, A4A DN DUCTILE IRON GGG 40.3 15 0.57 L
ADAPTER, A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM, A4A/S4A BARSTOCK ASTM 1213 CRS
BONNET A4W DUCTILE IRON GGG 40.6
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, 2 A4A DN DUCTILE IRON GGG 40.3 28.6 1.61 L
ADAPTER, 2 A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM, A4A/S4A 1-5/8 to 2-1/2 DUCTILE IRON GGG 40.3
BONNET A4W DUCTILE IRON GGG 40.3
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, 2 A4A DN DUCTILE IRON GGG 40.3 42.4 1.61 L
ADAPTER, 2 A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM, A4A/S4A 1-5/8 to 2-1/2 DUCTILE IRON GGG 40.3
BONNET A4W DUCTILE IRON GGG 40.3
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, 2-1/2 A4A DN DUCTILE IRON GGG 40.3 60 3.19 L
ADAPTER, 3 A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM, 3 A4A/S4A DUCTILE IRON GGG 40.3
BONNET A4W DUCTILE IRON GGG 40.3
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, 3 A4A DN DUCTILE IRON GGG 40.3 86 3.91 L
ADAPTER, 3 A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM, 3 A4A/S4A DUCTILE IRON GGG 40.4
BONNET A4W DUCTILE IRON GGG 40.3
COMPONENT DESCRIPTION MATERIAL Kv VOLUME
BODY, 4 A4A DN DUCTILE IRON GGG 40.3 116 6.5 L
ADAPTER, 4 A4A DN DUCTILE IRON GGG 40.3
COVER BOTTOM,4 A4A/S4A DUCTILE IRON GGG 40.4
BONNET A4W DUCTILE IRON GGG 40.3
75 MM
1-1/4 IN
1-5/8 IN
2 IN
2-1/2 IN
3/4 & 1IN
20 & 25
MM
100 MM
3 IN
4 IN
32 MM
40 MM
50 MM
65 MM