Back Pressure Regulator/Relief Valve0 pages

Back Pressure
Regulator/Relief Valve
Maintain Constant Flow to
Your Analyzers

Features

Description

t Designed specifically for power plant sample flow
rates

When installed in a system as shown below, the Back
Pressure Regulator/Relief Valve (BPRV) will hold a
constant pressure of approximately 20 psig (1.4 barg)
at the analyzer inlet. This pressure is maintained
independent of source pressure fluctuations or sample
flow changes. If inlet pressure rises, the regulator
opens to let excess flow pass through to drain. This
flow is usually used as the grab sample. This unit also
acts as a relief valve in the event of an over-pressure
condition.

t Most effective way to assure constant flow through
online analyzers
t Less prone to plugging and sticking than a
pressure reducing valve
t Will not wire draw or erode in normal service
t Fail safe relief valve

www.sentry-equip.com

Constant Flow
With the circuit below, the severe service (pressure
reduction) is handled by the VREL® or needle valve.
The BPRV only has to control pressure between 20
psig (1.4 barg) and atmosphere. This allows very
precise pressure control, minimizes plugging and
ensures high reliability.

9.1.1 Rev. 12 08/12

BPRV Back Pressure Regulator/Relief Valve

BPRV