SS-2 High Flow for High Instrument Pressure
(Model 4222)

The Ruelco SS-2 high flow pressure switch is a three way block and bleed valve that is operated by pressure acting on a piston opposing an adjustable spring force. It functions as either a normally closed or normally open valve, depending on through which of the two ports the instrument pressure (either pneumatic or hydraulic) is supplied. The output port is the same for either mode of operation. Pressure applied to the sense port will cause the valve to operate.

• 316 stainless steel construction (models to N.A.C.E. MR0175 available).
• Standard base range 10-10,000 PSI.
• Operating pressure range from .5 to 20,000 PSI.
• C_v factor of .090.
• Block and bleed 3-way valve.
• Holds constant and accurate set points.
• Designed for 1% plus or minus repeatability on set points.
• Minimum deadband between trip and reset pressure.
• Spring may be replaced with instrument and sensing pressure present in the sensor.
• Vent above sensing piston prevents high pressure from entering instrument supply.
• Optional tamper proof lockout device available.
• Optional indicating scale available (Model 4223).
• Capable of handling instrument pressure of up to 1500 PSI.