CONTROL DEVICE Russian patent published in 2009 - IPC F16K11/65 F16K31/44 G05D7/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to control valves and accessories and can be used at gas hole mouth. Discharge rod seats in the device body opposite the drive rod and is coupled with flat gate. Discharge rod diametre equals that of the drive rod. Discharge rod extension has a slot. Adjustable diaphragm-type throttle is arranged in the body on the discharge rod side to accommodate a plunger with narrow variable-section slits. Plunger extension has also a slot. Both aforesaid slots accommodate rocker arms. Chamber arranged ahead of the said diaphragm-type throttle communicates, via return valve, with the line feeding hydration inhibitor. Chamber arranged behind the said throttle communicates with body-size hole.

EFFECT: higher efficiency of hydration inhibitor feed.

1 dwg