Spring Return Valves
Spring Return Valves
(OP)
Has anybody heard of a vendor that deals in manually operated, spring return open, 6" and 4" NPT valves for a low mass flow application?
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RE: Spring Return Valves
Bettis actuators and others like them can be set up that way to work on lots of different valve bodies.
RE: Spring Return Valves
There is a flow meter setup in parallel with the main discharge of a vacuum pump. My client wants to, about once a month, walk up to the discharge, pull this valve closed, redirecting the discharge through the flow meter, take a measurement, and let the valve go, returning the system to normal operation.
My current vendors keep trying to get me to go with some type of actuator, but my client wants a manual valve.
RE: Spring Return Valves
I know of a few mfg'rs/distributors who should handle this product. What area are you in and maybe I can steer you in the right direction if that is allowed here.
RE: Spring Return Valves
RE: Spring Return Valves
Depending on the size and type of valves used the "spring mechanism" could be quite large to overcome valve opening/closing torque. Unless your client is a very big gorilla,
Be warned that this type of mechanism has been known to break fingers/arms etc. if mis-handled.
RE: Spring Return Valves
RE: Spring Return Valves
RE: Spring Return Valves
PS I am not judging you as the messanger and I understand. Fisher valve makes a 3" snappy Joe valve that could be changed (i'd bet) to a fail open spring valve.
RE: Spring Return Valves
RE: Spring Return Valves
RE: Spring Return Valves
http://www.bitorq.com/fusible_ht.html
http://www.bitorq.com/deadman_handles.html
RE: Spring Return Valves
RE: Spring Return Valves
The fusible link assemblies use the same concept, difference is they have the "link" retaining the handle in position (against the spring). You could possibly use this style, just disconnect the fusible link.
Good luck.