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The double check valve introduction

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The double check valve introduction Empty The double check valve introduction

Post  sophia11 Tue Jan 04, 2011 8:15 pm

A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It consists of two check valves assembled in series usually with a ball valve or gate valve installed at each end for isolation and testing. Often, test cocks (very small ball valves) are in place to attach test equipment for evaluating whether the double check assembly is still functional.

The double check valve is popular for the wide applications because it is purely to stop pollution of the mains. Otherwise, the negative mains pressure will permit dirty groundwater to infiltrate the mains pipe - possibly including road run-off, contaminated groundwater from industrial activities, or sewer leakage.

sophia11

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Join date : 2011-01-04

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