Model "E-A" – Inline, Ball Valve Type ESV 1" - 12" (100 - 3,600 PSI)
150#, 300#, 600#, 900#, 1500# Flanges - Rupture Pin Actuator

A plunger actuator is used to allow free movement with contaminated system pressure. The pressure source can be an enlarged pipe section from the protected system or a large direct line from the system. The actuator does not "see" any valve friction because the clutch does not engage until the actuator takes up the clutch slack. At set point, the ball valve isolates upstream pressure.
ADVANTAGES: The device operates with proven elements. Valve friction does not affect accuracy. A ball valve designed for the application is used. After shut off, the valve can be reset in minutes for a pin change by removing the vent plug and applying pressure to open the valve. When the valve is in its original position, change the pin. Remove auxillary pressure source and replace vent plug. The valve is now in a ready position to divert flow when the upstream pressure reaches set point.

Additional advantages of using Buckling Pin ESV's are as follows:
• 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 beauty of our system is in its simplicity.
.....(In many, there is only one moving part
.....and in all designs, the precise pin is the
.....sensor and actuator.)
• The standard accuracy is +/- 5%.
• Buckled pins can be replaced in minutes.
• Replacement pins are relatively inexpensive
.....and, if ordered from the factory before
.....noon, can be shipped the same business .....day.