Parker S4AD Manual

Dual Position Solenoid Valve
Type S4AD
Port Size: 20 mm to 100 mm (3/4" – 4")
For Ammonia, R-22 and
other common Refrigerants
Features
• Prevents the damaging effects of vapor
propelled liquid
• Combined use as a hot gas and soft gas
valve
• Integrated S6A Pilot Solenoids
• Standard Coil Housing Meets NEMA 3R
and NEMA 4 - Rain Tight
• Reduces installed costs
• Pilot Light Available
• Manual Opening Stem
• Maximum Rated Pressure (MRP): 27.6 bar
(400 psig)
Fig 1
Refrigerating Specialties Division
311446
Bulletin 30-95C
May 2007
Service and Installation
Description
The S4AD is based on the same valve body, principles,
and length dimension as the standard S4A valves
making for easy field replacements. This heavy duty
solenoid valve is suitable for ammonia, R-22, other
refrigerants, and certain oils and other fluids approved
for use in refrigeration. The S4AD is a pilot operated,
dual-position, normally closed valve. aIt will close on
power failure. The S4AD may be opened by means of
the manual opening stem for servicing or in case of
electrical power failure.
The Type S4AD Solenoid Valve is furnished with FPT
Internal NPT (U.S. Standard Taper Pipe Thread), Socket
Weld, Weld Neck or ODS (solders over copper tubing of
given diameter) connections. The valve may be easily
removed from between the flanges for servicing.
It is advisable to install as strainer upstream of each
valve to prevent entrance of foreign material into
the valve and the rest of the system. Refrigerating
Specialties strainers are available to close-couple to
valve inlets.
Purpose
The S4AD is a spring closing valve, suitable for use in
refrigerant liquid, hot gas or suction lines in a tem-
perature range of -45° to 105° C (-50° to 220° F).
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I S O 9 0 0 1 - 2 0 0 0 C E R T I F I E D