| 摘要 |
Disclosed is a double-piston-effect valve. Two valve seats (2) are symmetrically arranged in valve decks (1) on two sides. A piston ring (3) is arranged on a back face of the valve seat (2), an internal O-shaped ring groove (4) is formed in the inner circumferential direction of the piston ring (3), an external O-shaped ring groove (5) is formed in the outer circumferential direction of the piston ring (3), an O-shaped ring is arranged in the internal O-shaped ring groove (4) and the external O-shaped ring groove (5) in a matching mode, and two semicircular notches (7) are also symmetrically formed on a protruding part (6) of the piston ring (3). The double-piston-effect valve is good in sealing effect, low in cost, easy to manufacture, easy to assemble, and easy to replace and maintain. |
