FLOW CONTROL ASSEMBLY ACTUATED BY PILOT PRESSURE

摘要

A flow control assembly can include a pilot-operated valve and a pilot control valve. The pilot-operated valve includes a closure element between inlet port and outlet ports of the pilot-operated valve and an actuating element adjacent to the closure element. The closure element can move between an open position allowing fluid flow between the inlet and outlet ports and a closed position preventing fluid flow between the inlet and outlet ports. A pilot pressure communicated to the actuating element can cause the actuating element to apply force that moves the closure element to the open position. The pilot control valve can include a closure element between inlet port and outlet ports of the pilot control valve. Communicating an actuation pressure to the closure element of the pilot control valve can open the pilot control valve. Opening the pilot control valve can allow communication of pilot pressure to the pilot-operated valve.

主权项

1. A flow control assembly comprising:
a pilot-operated valve comprising:
a first closure element positioned between a first inlet port and a first outlet port of the pilot-operated valve, the first closure element movable between an open position allowing fluid flow between the first inlet and outlet ports and a closed position preventing fluid flow between the first inlet and outlet ports, andan actuating element adjacent to the first closure element, the actuating element movable in response to communication of a pilot pressure to the actuating element via a pilot port of the pilot-operated valve, wherein the first closure element is movable to the open position in response to a force applied by movement of the actuating element; and a control valve comprising a second closure element positioned between a second inlet port and a second outlet port of the control valve, wherein the second closure element is movable to an open position allowing fluid flow between the second inlet and outlet ports in response to communication of an actuation pressure to the second closure element, wherein the control valve is operable for allowing the communication of the pilot pressure to the pilot port in response to the second closure element being in the open position.