Backpressure Regulator in a Closed Loop Piping System

Plast-O-Matic Valves' Andy Ryan describes the use and function of a normally-closed, 2-port "relief/backpressure" valve at the downstream end of a closed loop piping system. The valve is used to regulate backpressure, so that the system will maintain a desired, pre-set pressure to points of use.

[@briang1561]

Nice love these explanations!

[@jsohn18436572]

why can the bypass valve not be used in place of the backpressure valve to control return flow and thus backpressure?

[@plast-o-maticvalvesinc.8143]

Hi jsohn, thanks for your interest. The valve Andy is describing does all of these things: Relief, bypass, pump bypass, backpressure, anti-siphon -- Series RVDT performs all of those functions because they are all based on upstream pressure, or backpressure. In other words, our bypass valve is a backpressure valve. Andy is simply calling it different things based on what it is required to do in the application. Here is a technical brief that may help clarify: plastomatic.com/technical-article/introduction-to-reliefbypassbackpressure-valves/