Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1980-07-18
1981-04-28
Michalsky, Gerald A.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
137458, 13762427, 13762566, F15B 1304, F16K 3700
Patent
active
042639387
ABSTRACT:
A relay valve for controlling fluid flow to and from a valve actuator included in a safety system for a flowline such as a production line of an oil or gas well. The relay includes a slide valve (60) which is manually pushed inwardly to the open or set position and held therein by pilot fluid which is also applied to the valve actuator. A visual indicator mounted on a knob (102) of the slide valve is operated by fluid applied to a passage (96) formed in the slide valve. A vent port (82) prevents pilot pressure from moving the slide valve from the closed position to the open position. A modified relay valve (150) has separate inlet ports (198 and 200) for receiving pilot fluid and actuator fluid and a vent port (206) which is in direct fluid communication with the pilot port in the closed position of the slide valve.
REFERENCES:
patent: 4004610 (1977-01-01), Theriot
patent: 4137942 (1979-02-01), Hargraves
patent: 4145025 (1979-03-01), Bergeron
Belsheim Stephen T.
Michalsky Gerald A.
Riddle Eugene N.
W-K-M Wellhead Systems, Inc.
LandOfFree
Relay valve for fluid actuators does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Relay valve for fluid actuators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relay valve for fluid actuators will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-858659