Parker Refrigerating Specialties: 3, S9A, 3/8" F, 3" Socket Weld, ST

Details

The S9A and S9W are heavy-duty gas powered valves suitable for ammonia and other refrigerants, certain oils and other fluids approved for use in refrigeration. They are pilot operated semi-steel bodied valves. The valves may be opened by means of the manual opening stem for servicing or in case of electrical power failure. The Type S9A and S9W are pilot operated valves but uses an external source of higher pressure gas to operate the valve, and, therefore requires no minimum pressure drop to open. The external gas pressure for the Type S9A must be at least 0.69 bar (10 psi), and 0.71 bar (10 psi) for the S9W, above valve internal upstream pressure for positive opening. This valve is normally closed. They are two-position valves using condenser gas pressure acting upon a piston for opening, and a strong spring for closing. A lapped seat at the top of the piston prevents the condenser gas from leaking around the piston to the compressor suction side of the valve. A twin Pilot Solenoid Valve assembly serves to admit condenser gas pressure to the piston for opening and to bleed this gas pressure to the suction line for valve closing. A single-pole, double throw thermostat or relay may be used to control these two Pilot Solenoid Valves.

More Information

Weight
169.130000

Manufacturer
Parker RS - Refrigerating Specialties

Condition
New

Port Size
3"

Port Size (MM)
80mm

Strainer Type
With Strainer

Body Material
Gray Iron

Flange Type
Socket Weld

Valve Material
Standard Valve Material

Plating
No Plating

Seat Material
Metal

Flow Coefficient (CV)
100 Cv

Flow Coefficient (KV)
86 Kv

Min Operating Temperature (C)
-50 °C

Min Operating Temperature (F)
-60 °F

Maximum Pressure (BAR)
27.6bar

Maximum Pressure (psig)
400psig