Patent ID: 6968856

Claim:
A flow control device comprising: a primary line; a primary line inlet and a primary line outlet; an actuating line and a control line, each said actuating line and said control line in fluid communication with said primary line; a meter for determining flow through said primary line; an actuating valve; said actuating valve having an actuating valve inlet in fluid communication with said actuating line; said actuating valve biased to a first actuating valve position; a control assembly operably connecting said meter and said actuating valve; said control assembly operable to move said actuating valve to a second actuating valve position responsive to said meter; a primary line valve on said primary line; said actuating valve operable to provide fluid communication to said primary line valve in said second actuating valve position; said primary line valve operable to a closed position responsive to flow through said actuating valve; an eductor on said primary line; said eductor having a primary line eductor inlet, a primary line eductor outlet and a suction chamber; an eductor diaphragm in said eductor suction chamber; said eductor diaphragm defining a suction chamber primary line side and a suction chamber actuating line side; said eductor diaphragm moveable responsive to differential pressure between said suction chamber primary line side and said suction chamber actuating line side; an engagement controller engaging said eductor diaphragm and said control assembly; said engagement controller operable to disconnect said control assembly connection between said meter and said actuating valve; said primary line valve intermediate said eductor and said primary line inlet; and said control line in fluid communication with said eductor inlet intermediate said primary line valve and said eductor inlet.