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Class Information
Number: 137/505.23
Name: Fluid handling > Line condition change responsive valves > With separate connected fluid reactor surface > With opening bias (e.g., pressure regulator) > Through external pipe > Modified valve casing
Description: Devices in which the valve casing is modified to receive the external pipe.

Patents under this class:

Patent Number Title Of Patent Date Issued
4060213 Pressure control device Nov. 29, 1977
4044792 Diaphragm operated pressure regulator Aug. 30, 1977
3958599 Remote sensing regulator and shutoff valve for valve manifolds May. 25, 1976

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