Patent ID: 9303777
Filing Date: 2016-04-05
CPC Classification: E03C,F16K,Y10T

Claim Text:
1. A pressure limiting valve having a first pressure gauge configured to measure the operability of a backflow preventer having a line pressure relatively higher than a maximum PSI rating of the first pressure gauge, the valve comprising: a valve body having an inlet configured to statically couple to the backflow preventer and an outlet configured to couple to the first pressure gauge and a second pressure gauge; an upper and lower chamber formed from an interior portion of the valve body, the chambers being generally separated by a diaphragm; a conduit fluidly coupling the upper and lower chambers; a spring actuable via movement of the diaphragm in response to pressure changes in the valve body, wherein the spring generally biases a closure disc in an open position relative to the outlet when the valve body is not under pressure, and compresses under pressure to permit the closure disc to seal the outlet when pressure in the valve body approximately reaches the maximum PSI rating of the first pressure gauge, thereby limiting the maximum pressure deliverable to the first pressure gauge; and a fluid control valve to selectively control fluid flow from the lower chamber to a drain.