| 摘要 |
PURPOSE: A piston check valve for reducing noise with alleviated impact is provided to improve the quality and reliability of products with reduced noise and to inculcate good image to consumer. CONSTITUTION: A piston check valve(50) for reducing noise with alleviated impact comprises an impact and noise reduction part(60) arranged in one side of the check valve. The impact and noise reduction part is assembled on a valve plate rotating on a rotary pin. The impact and noise reduction part is opened if fluid flows forward. If the fluid does not flow, the impact and noise reduction part is gradually closed to reduce the damage and noise of the check valve. The impact and noise reduction part comprises a body(61), a piston(64), a hinge shaft(68), and a rotary supporting shaft(67). |
