Non-flowing pressure responsive pilot valve

Details Non-flowing pressure responsive pilot valve Non-flowing pressure responsive pilot valve

G - Physics

05

D

137/39.1

G05D 16/00 (2006.01) G05D 7/01 (2006.01)

Patent

CA 1254484

NON-FLOWING PRESSURE RESPONSIVE PILOT VALVE Abstract of the Disclosure A non-flowing pilot valve (16) for a control valve (C) in a main flow line (F) having a body (27) with an inlet fluid chamber (76), an outlet fluid chamber (106) and an intermediate fluid chamber (104) between the inlet fluid chamber (76) and the outlet fluid chamber (106). Diaphragm (34) in the fluid inlet chamber (76) is secured to a piston slidable body (40) extending within inter- mediate fluid chamber (104) and having a valve seat (88) thereon between inlet fluid chamber (76) and intermediate fluid chamber (104). A second fixed valve seat (64) is provided within the body (40) between the intermediate fluid chamber (104) and the outlet fluid chamber (106). A valve spool (92) has a pair of O-ring seals (94, 96) thereabout adapted to seal against the valve seats (88, 64). Unseating of the O-ring seals (94, 96) from the seats (88, 64) results from predetermined pressure changes in the sensed fluid pressure in fluid pressure chamber (76) and communicating such pressure changes through a fluid line (22) from the intermediate fluid chamber (104) to the control valve (C). An embodiment shown in Fig. 11 provides a delayed response to the control valve resulting from pressure changes in the sensed fluid pressure. The delayed response is obtained by a flow restriction (150) in a line (148) from an intermediate fluid chamber portion (144) which is separated by a diaphragm (140) from a balancing intermediate fluid portion (142).

510427

Affiliated with

Also associated with

Rating

Non-flowing pressure responsive pilot valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-flowing pressure responsive pilot valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-flowing pressure responsive pilot valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1236269