Hansen HS7 Operating instructions

TAPERED SEAT
MANUAL OPENING
STEM
TEFLON DISC
STAINLESS
STEEL
PISTON
Specifications, Applications,
Service Instructions & Parts
HS7
SOLENOID VALVE
3/4”, 1”, 1-1/4” PORT
(20, 25, 32 mm)
Bulletin S121c
APR 2006
Flanged
3/4” thru 1 1/4”
FPT, SW, WN, ODS
for refrigerants
HS7 Solenoid Valve
INTRODUCTION
This flanged, heavy duty, pilot-operated, industrial
refrigeration solenoid valve controls the flow of
refrigerant. When electrically energized, a slight
pressure difference across the valve causes it to open
wide; when de-energized, a spring promptly closes the
main Teflon seat to stop all flow in the arrow direction
on the valve body.
APPLICATIONS
This advanced design valve is ideal as a standard,
stock, ammonia liquid line solenoid valve. While
primarily for ammonia, this valve is also suitable for
R22, R134a, CO2 and other approved refrigerants.
Most common use is to automatically stop liquid line
feed to recirculating liquid overfeed evaporators, to
float switch controlled accumulators, and to thermal
expansion valves; it is also suitable for hot gas defrost,
and evaporator suction. (Note: for gravity liquid drain
or equalization applications use low pressure drop
HCK2 gas-powered suction stop valve or HS9B gas-
powered solenoid valve.)
MAXIMUM RATINGS, AMMONIA†
PORT SIZE 3/4”
(20mm)
1”
(25mm)
1 1/4”
(32mm)
Liquid, Receiver Pressure
Tons (kW), .2 bar Δ P
200
(765)
263
(983)
400
(1530)
Recirculation, 4 to 1
Tons (kW), .2 bar Δ P
45
(228)
63
(293)
90
(455)
Hot Gas, for 0ºF
Tons (kW )
21
(73)
27
(94)
40
(140)
Suction, 2 psi drop at 20ºF
Tons (kW), .15 drop at -7ºC
12
(42)
16
(56)
24
(84)
Flow Factor
Cv (Kv)
8.0
(7.0)
10.5
(9.0)
16.3
(14)
† For flow near maximum ratings, piping should be
one size larger than port.
KEY FEATURES
ADDITIONAL FEATURES
Encapsulated Hansen standard coil
300 psi (20 bar) MOPD, 500 psi (34 bar) for CO2
Teflon main & pilot seats
Manual opening stem
Available close-coupled strainer
Heavy duty, pilot-operation
Vertical or horizontal installation
CSA Certified Status
Non-asbestos gaskets
Wireless pilot lights
CE Available
STAINLESS STEEL
CLOSING SPRING

2
S121c
APR 2006
Item Description Qty Part No.
Coil Kit (115V) 1/2" Fitting w/leads 1 70-1085
Coil Kit (208/230V) 1/2" Fitting w/leads 1 70-1086
Coil Kit (24V) 1/2" Fitting w/leads 1 70-1087
Coil Kit (Other Voltages) 1 FACTORY
Above kits consist of:
1a Bare Coil, 115V 50/60 Hz w/leads 1 70-0580
1b Bare Coil, 208/230V 50/60Hz w/leads 1 70-0581
1c Bare Coil, 24V 50/60Hz w/leads 170-0582
1d Other Voltage Coils 1FACTORY
2Coil Knob 170-0579
3O-Ring 175-0340
Solenoid Tube/Plunger Kit 1 70-1059
Above kit consists of:
5Plunger 170-0295
6Solenoid Tube 170-0298
7 Solenoid Tube Gasket 1 70-0301
8 Tube Screws 4 70-0297
2 Coil Knob 1 70-0579
3O-Ring 175-0340
Gasket Kit 1 70-1017
Above kit consists of:
7Solenoid Tube Gasket 1 70-0301
9Upper Body O-Ring 1 70-0131
10 Lower Body O-Ring 1 70-0130
11 Flange Gasket 3 70-0132
12 Stem O-Ring 1 70-0010
13 Stem Washer 1 70-0026
14 Packing Nut 1 70-0019
16 Stem Packing 1 70-0025
15 Seal Cap O-Ring 1 70-0011
Bonnet Cartridge Kit 1 70-1018
Above kit consists of:
17 Cartridge Assembly 1 70-0162
Gasket Kit 1 70-1017
Solenoid Tube/Plunger Kit 1 70-1059
Piston Assembly Kit 3/4" 1 70-1019
Piston Assembly Kit 1" 1 70-1020
Piston Assembly Kit 1 1/4" 1 70-1021
Above kits consist of:
18a Piston Assembly 3/4" 1 70-0166
18b Piston Assembly 1" 1 70-0163
18c Piston Assembly 1 1/4" 1 70-0167
19 Closing Spring 1 70-0155
9 Upper Body O-Ring 1 70-0131
10 Lower Body O-Ring 1 70-0130
Stem Kit 1 70-1022
Above kit consists of:
20 Stem 1 70-0128
Gasket Kit 1 70-1017
Seal Cap Kit 1 70-1023
Above kit consists of:
21 Seal Cap 1 50-0411
15 Seal Cap O-Ring 1 70-0011
Bolt and Nut Kit
For HS7 less Strainer (a) 70-1024
For HS7 with Strainer (b) 70-1025
Above kits consist of:
22 Nut 4 70-0136
23a Bolt (less Strainer) 2.75" 4 70-0339
23b Bolt (with Strainer) 2.75" 2 70-0339
23b Bolt (with Strainer) 6.5" 2 70-0134
24 Assembled Body Replacement Kit FACTORY
Complete Valve less Coil Kit and Flanges
25 Flange Kit (FPT,SW,WN,ODS) FACTORY
Includes (2) Flanges only;
Specify Style and Siz
e.
ALLOW 2.25” (57)
FOR COIL REMOVAL
2.95”
(75)
1/2” NPSM
7.24”
(184)
4.21”
(107)
4.10”
(104)
11.90”
(302)
8.25” (210) WITHOUT STRAINER
ALLOW 3” (76)
FOR STRAINER BASKET REMOVAL
5.10”
(130)
Maximum width of valve is 4.63” (116).
MATERIAL SPECIFICATIONS
Body: Ductile iron (Nodular Iron GGG-40)
Bonnet-Cartridge: Steel, plated
Piston: Stainless steel
Plunger: Stainless steel
Solenoid Tube: Stainless steel
Pilot Orifice: Stainless steel
Seat: Teflon
Safe Working Pressure: 400 psig (27 bar) 600 psig
(41 bar) for CO2
Operating Temperature: –60ºF to +240ºF
(–50ºC to +115ºC)
ADVANTAGES
Power saving, low-wattage molded coil; Teflon seats;
stainless steel trim including piston; spring-closing;
double seal manual opening stem. One standard
molded coil fits all Hansen valves.
INSTALLATION
Protect interior of valve from dirt during installation;
normally use close-coupled inlet strainer. Allow 2.25”
(57mm) above valve for coil removal, 3” (76 mm) below
strainer for screen removal. Match arrow on body
with system flow direction. If a pressure reversal
can occur, as during hot gas defrost with liquid
recirculation, use a check valve on the outlet side
of the HS7. For proper flange gasket sealing, care
must be taken when threading or welding to assure
flanges are parallel to each other and perpendicular
to pipe. Also, gaskets should be lightly oiled and all
bolts must be tightened evenly.
INSTALLATION DIMENSIONS
INCHES (MILLIMETERS)
PARTS LIST

3S121c
APR 2006
2
1
5
8
7
24
19 25
23
12
16
14
21
20
15
13
23
11
18
10
9
17
3
6

4
S121c
APR 2006
Color Part No.
Red 70-1100
Amber 70-1101
Green 70-1102
Beacon Pilot Light Kits
ODS
STD ALSO STD
3/4" (20) 1" (25)
1 1/4" (32) 7/8" (22)
1" (25) 3/4" (20)
1 1/4" (32) 1 1/8" (28)
1 1/4" (32) 3/4" (20)
1" (25) 1 3/8" (35)
Flange Connection Style & Sizes
Inches (Millimeters)
FPT, SW, WN
Hansen Technologies Corporation
6827 High Grove Boulevard
Burr Ridge, Illinois 60527 USA
Tel: [phone] Fax: [phone] Toll: 800.426.7368
Email: [email protected] Web: www.hantech.com
USA ∙Asia ∙Europe ∙India ∙Latin America ∙Middle East
© 2006 Hansen Technologies Corporation
ELECTRICAL
The coil draws 16 watts and will operate properly
between 85% and 110% of rated voltage (24V coil
draws 19 watts). Standard coil connection is a 1/2”
fitting (NPSM) for conduit, with two 18” wire leads and
ground wire. Coils with DIN plug or 1/2” NPSM quick
disconnect plug are available. Contact the factory.
All coils are totally encapsulated and meet NEMA 3R
(rainproof) and NEMA 4 (splashproof, approx. IP65)
requirements. The coil should only be energized
while on the solenoid tube. Otherwise, immediate coil
burnout may occur. To avoid bending the solenoid
tube, remove the coil from valve before connecting
any electrical conduit. Pilot lights are available.
SERVICE AND MAINTENANCE
Failure to open: wrong voltage coil; low line voltage;
controlling switch or thermostat not contacting; coil is
burned-out; inlet/outlet pressure differential too high;
less than 2 psi (0.14 bar) pressure drop across valve;
piston or plunger is jammed closed with dirt.
Failure to close: controlling switch or thermostat
not opening contacts; manual opening stem is turned
in; piston or plunger is jammed upward by dirt; damage
or dirt at main valve seat or pilot valve seat.
Before opening the valve for service, be sure it is
isolated from the system and all refrigerant is removed.
Disconnect electrical power from coil. Remove the coil
by unscrewing the coil knob. Use a large wrench to
unscrew the bonnet-cartridge proceeding cautiously
to avoid any refrigerant still remaining inside the
valve. Remove closing spring and piston. Check for
dirt on piston or seat. Polish with fine emery cloth
and replace or else install new parts. Check and
replace bonnet-cartridge O-rings if necessary, using
refrigerant oil or grease.
To check pilot section of valve, loosen four solenoid
tube screws, break seal between solenoid tube
and bonnet-cartridge; being careful to avoid any
refrigerant which may remain. Check face of Teflon
seat in plunger, plunger spring, and pilot seat orifice
on bonnet-cartridge. Clean, polish or replace parts
as necessary. Always replace plunger and solenoid
tube as a set. Pilot seat is integral with bonnet-
cartridge. Install new solenoid tube gasket and oil
lightly. Reassemble bonnet-cartridge to valve body,
using 75 foot-pounds torque to tighten secondary,
metal, knife edge seal. Carefully check the valve for
leaks before restoring to service.
CAUTION
Hansen valves are only for refrigeration systems.
These instructions must be completely read and
understood before selecting, using or servicing Hansen
valves. Only knowledgeable, trained refrigeration
mechanics should install, operate, or service these
valves. Stated temperature and pressure limits should
not be exceeded. Bonnets, solenoid tubes, etc. should
not be removed from valves unless system has been
evacuated to zero pressure. Must also see Safety
Precautions in current List Price Bulletin and Safety
Precautions Sheet supplied with product.
WARRANTY
All Hansen products, except electronics, are
guaranteed against defective materials or workmanship
for one year F.O.B. factory. Electronics are guaranteed
against defective materials or workmanship for 90
days F.O.B. factory. No consequential damages or
field labor is included.
ORDERING INFORMATION
FPT: Female Pipe Thread (American National Standard)
SW: Socket Weld to accommodate American and API pipe
WN: Weld Neck to match American Schedule 40 pipe
ODS: Outside Diameter Sweat, for copper tube size
Standard encapsulated solenoid coil is included
for 50/60Hz 208/230, 115, or 24 volts; other
voltages offered. Standard coil connection is
a 1/2” fitting (NPSM). Coils with DIN plug or
1/2” NPSM quick disconnect plug are available;
please specify when ordering. Pilot lights are
also available.
OPTIONAL BEACON PILOT LIGHTS
Pilot Light Kit includes Beacon pilot light, knob and
o-ring. A/C Coils Only.
TO ORDER:
Specify type, connection type and size, volts, and
strainer if required. Unless otherwise specified,
standard coil with 1/2” connection will be supplied.
TYPICAL SPECIFICATIONS
“Refrigerant solenoid valves shall have encapsulated,
watertight coils, Teflon seats, steel or ductile iron
bodies, spring closing pilot and main valve seats, and
be suitable for a safe working pressure of 400 psig
(27 bar), as manufactured by Hansen Technologies
Corporation or approved equal.”