Method and apparatus for determining set pressure of pilot...

Details Method and apparatus for determining set pressure of pilot... Method and apparatus for determining set pressure of pilot...

Category

G - Physics

Subcategory

01

Subsubcategory

N

IPC codes

G01N 19/00 (2006.01) F16K 37/00 (2006.01)

Type

Patent

Patent number

CA 2061908

Description

A testing system for a pilot operated, pressure relief valve of the type wherein movement of the pilot in response to a predetermined line pressure effects the opening of the pressure relief valve comprising a portable apparatus including a source of test fluid pressure, a flow regulating test valve connected to the test pressure source and a piston in the test valve movable in response to the rate of fluid flow through the test valve. The output end of the test valve is connected to a two branch lien, one branch line connecting the test valve to the inlet passage of the pilot and the other branch line connecting the test valve to a trapped fluid pressure chamber of the relief valve which is vented by the opening movement of the pilot. A pressure gauge is also connected to the test valve and a plunger on the piston effects the isolation of the pressure gauge when the piston is moved by the increased flow produced through the test valve by the opening of the pilot.

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