Patent ID: 6161576
Filing Date: 2000-12-19
Classification: F04D,F16K,Y10T

Abstract:
A gas delivery system comprising:a gate valve that can be connected between a turbo pump and a process chamber and including a valve body, a valve seat and a housing constructed to support the valve seat, wherein (a) the valve body is secured within the housing so as to move relative to the valve seat between an opened position and a closed position, and (b) the housing is provided with a gas passageway connected to each of the spaces on opposite sides of the valve body when the valve body is in the closed position; anda plurality of valves mounted to the housing of the gate valve and arranged so as to control the flow of gas through the passageway so that in operation the chamber and turbo pump can be pumped down through the gas passageway with a second pump connected to one of the valves, and gas can be transferred and the flow controlled through the passageway bypassing the valve body when the valve body is in the closed position.