Back Pressure Regulator/Relief Valve - Sentry Equipment - #1

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ƒÞ Designed specifically for power plant sample flow rates ƒÞ Most effective way to assure constant flow through online analyzers ƒÞ Less prone to plugging and sticking than a pressure reducing valve ƒÞ Will not wire draw or erode in normal service ƒÞ Fail safe relief valve 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. 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. www.sentry-equip.com 9.1.1 Rev. 10 01/07 BPRV Back Pressure Regulator/Relief Valve BACK PRESSU RE REGULATO R/RELIEF VAL VE Maintain Constant Flow to Your Analyzers BPRV Features Description