Nozzle-type check valve with piston
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United States of America Patent
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Aug 29, 2017
Issued Date -
N/A
app pub date -
Mar 4, 2015
filing date -
Mar 4, 2015
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An exercisable check valve having a fluid delivery test channel and piston closure is disclosed herein. A valve closure member stops flow through the valve in the presence of backwards pressure or when engaged by the piston. The valve may be tested by applying a pressure source to the fluid delivery test channel to cause the piston to engage the valve closure member and stop flow through the valve. A test rod may then be inserted into a test rod port to ensure the valve closure member is in the proper closed position. The check valve may also include a biasing element to bias the valve closure member to an open position and a drainage channel. The check valve may be used in any piping or valve system.
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