Actuator Pilot for a Differential
Set Pressure Source
Actuator pilot for contaminated fluids using instrument air, or clean fluids to the main valve actuator.
A 2-position – 3-way or 5-way spool valve Buckling Pin pilot power the valve actuator to rotate the main quarter turn valve at set pressure.
The Model W-B pilot allows sensing a differential pressure source with a 316 piston, trim, and cylinder and at a differential set pressure, send clean fluids to a valve actuator through a 2- position – 3-way spool valve for a spring ended actuator or a 2-position – 5-way spool valve for a pressure-pressure actuator. This allows you to turn any quarter-turn valve into a relief valve or an emergency shutdown valve.
Additional Advantages:
• You get safety without venting
..pollution.
• No product loss by venting.
• No flare system required.
• No yearly valve testing.
• The pin obeys Euler's Law precisely
..and cannot fatigue.
• There is no set pressure variation
..with ambient temperature change
..on the pin.
• The precise pin is the sensor and
..the actuator.
• The standard accuracy is +/– 5%.
• Buckled pins can be replaced
..in minutes.
• The pin cannot fatigue
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Features & Advantages:
• The spool valve is sized for the actuator speed required.
• The spool valve can work with
clean fluids to 250 PSI.
• The Buckling Pin spool pilot valve can have set pressure from 1 to 5,000 PSI but is not adaptable for fluids that will solidify in the piston chamber.
ADVANTAGES: Excellent accuracy, simplicity(one moving part) and proven reliability. The sensing accuracy is +/– 5% of set point.
APPLICATIONS:
Turn any quarter-turn valve into a relief valve or an emergency shutdown valve.
PROXIMITY SENSOR OPTION: Gives a remote indication of the pin buckling and the spool shifting.
RESETTING:
To reset the pilot, vent the differential system pressure, remove the holding nut, discard the buckled pin, push the spool in, install a new pin, screw in the holding nut and put system differential pressure again on the Buckling Pin piston. Put the low differential pressure on first and then the high differential pressure.
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