主权项 |
1. A check valve comprising:
a valve body defining a valve opening; a pair of valve elements mounted so as to be movable from a closed position in which they close the valve opening to prevent fluid flow through the opening to an open position in which they permit fluid flow through the opening; a one piece bridge element having first and second end portions mounted to the valve housing on opposite sides of the valve opening and an intermediate portion extending between the end portions, the intermediate portion acting as a stop for the valve elements in their open position; and a valve shaft mounting the valve elements for pivotal movement between their open and closed positions, said valve shaft being supported in the end portions of the bridge element. |