Nozzle-type check valve with piston

• Main Authors: DWYER DAVID B, KORNIJENKO JOHN, RIEGLE JOSHUA HOWARD, LAMBIN JASON P, HARRY BRUCE W
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2018
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

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 closuremember to an open position and a drainage channel. The check valve may be used in any piping or valve system. 本发明公开种可运用的止回阀，该止回阀具有流体输送测试通道和活塞闭合件。在存在反向压力的情况下或当被活塞接合时，阀闭合构件停止通过该阀的流动。通过施加压力源到流体输送测试通道以引起活塞接合阀闭合构件并且停止通过该阀的流动，可以测试该阀。测试棒然后可以插入到测试棒端口中以保证阀闭合构件处于适当的关闭位置。该止回阀还可以包括：偏压元件，该偏压元件用来将阀闭合构件偏压到打开位置；和排出通道。该止回阀可以用于任何管道或阀系统。