| 摘要 |
In a valve having first and second poppet members which control the flow of fluid from an entrance port to an outlet port. The valve has a cylindrical body with a center bore through which fluid from the second poppet member flows and is thereafter combined with the external fluid flow controlled by the first poppet member. A sleeve which forms a part of the second poppet member is concentric to the cylindrical body. The sleeve has a flange that is located in a groove on the peripheral surface of the cylindrical body. A flexible member is located in the groove and acts on the flange to urge the sleeve toward a stop. The cylindrical body is connected to an actuation member for moving the first and second poppet members with respect to corresponding first and second seats and allowing fluid to flow from the entrance port to the outlet port. A surface on the sleeve forms the second poppet which engages the second seat prior to the first poppet engaging said first seat as the actuation member moves the cylindrical body toward the rest position. Further movement of the cylindrical body toward the rest position, compressing the flexible member between the sleeve and cylindrical body to effect a seal therebetween and to provide a seal between the first poppet and first seat to prevent internal fluid leakage through the valve. |
