Patent ID: 8312893

Claim:
A valve, comprising: a housing defining an inlet passage and an outlet passage; and a plug assembly disposed within the housing and comprising: a hub cap disposed within the housing and defining an annular channel, the hub cap and housing each having surfaces which directly define at least portions of an internal piston chamber; a plug reciprocally moveable between a closed position whereat the plug is operative to prevent the flow of fluid from the inlet passage to the outlet passage, and an open position whereat fluid is able to flow from the inlet passage into the outlet passage, the plug being at least partially received within the annular channel when the plug is in the open position; and a piston head disposed within the internal piston chamber and cooperatively engaged to the plug such that the selective application of fluid pressure to the piston head is operative to facilitate the movement of the plug between the closed and open positions; wherein the housing defines first and second passages which are each operative to deliver fluid pressure to the piston head for facilitating movement of the plug the first and second passages being formed within the housing so as not to traverse the flow path.