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 over feed 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 por t.
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
Ver tical or horizontal installation
CSA Cer tified Status
Non-asbestos gaskets
Wireless pilot lights
CE Available
STAINLESS STEEL
CLOSING SPRING