Gate Valve - reverse acting, why?
Gate Valve - reverse acting, why?
(OP)
If I have understood this correctly, in reverse acting gate valves, you pull the plug up to close the valve. Gate down = open valve.
What are the benefits of such a design?
In what kind of aplications is this valve used?
What are the benefits of such a design?
In what kind of aplications is this valve used?





RE: Gate Valve - reverse acting, why?
David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: Gate Valve - reverse acting, why?
RE: Gate Valve - reverse acting, why?
No, this has nothing to do with fail safe action.
The valve is fail safe close.
re Joesteam;
The design in question here will not result in the valve stem in the main flow area. This is a slab gate. It's a plate with a hole in it. When the gate is down, the hole matches the flowpath. When the gate is up, the plate is blocking the flowpath.
My question is: Can anybody point out an aplication were this will be of any benefit?
RE: Gate Valve - reverse acting, why?
Andy
RE: Gate Valve - reverse acting, why?
As indicated by Joe the valve is to be coupled with a reverse action actuator.
The air to open aspect raises your stem providing flow. With an air loss (w/ spring return) it will cause a positive mechanical closure.
Frank "Grimey" Grimes
Rule 25. of Swanson's "Unwritten Rules of Management"
Have fun at what you do. It will reflect in your work. No one likes a grump except another grump.
RE: Gate Valve - reverse acting, why?
RE: Gate Valve - reverse acting, why?
The most common valve I'm aware of in this design configuration is MAXON. www.maxoncorp.com.
RE: Gate Valve - reverse acting, why?
RE: Gate Valve - reverse acting, why?
RE: Gate Valve - reverse acting, why?