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Class Information
Number: 137/505.21
Name: Fluid handling > Line condition change responsive valves > With separate connected fluid reactor surface > With opening bias (e.g., pressure regulator) > Main flow through isolated reactor chamber
Description: Devices wherein the flow line comprises sequentially, the valve chamber, a flow line or passage distinct from the outlet of the valve chamber, and a remote isolated reactor surface chamber the reactor surface of which is mechanically connected to the valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
8689823 Hydro-pneumatic system with pressure limiting valve Apr. 8, 2014
8356624 Self-operated pressure transmission type of pressure reducing valve with corrugated pipe Jan. 22, 2013
5875813 Automatic back water valve system Mar. 2, 1999
5538032 Automatic back water valve system Jul. 23, 1996
4543985 Pressure regulator Oct. 1, 1985

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