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Class Information
Number: 137/477
Name: Fluid handling > Line condition change responsive valves > Pop valves > Adjustable choke > Annular lip or baffle > On movable valve part
Description: Valves in which the annular adjustable lip is on a movable valve part.

Patents under this class:

Patent Number Title Of Patent Date Issued
8505572 Pressure relief valve Aug. 13, 2013
4979540 Cartridge-type direct loaded safety and pressure-relief valve having flow path for preventing supersonic flow and minimizing valve hysteresis Dec. 25, 1990
4708164 Safety relief valve Nov. 24, 1987
4226261 Relief valve Oct. 7, 1980

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