High Pressure Shutoff Valve?
High Pressure Shutoff Valve?
(OP)
Does anyone know of a spring loaded (or other type) valve that will permit flow at a low pressure and then shut off when the pressure increases? I know this sounds counter-intuitive, but here is my basic problem:
I have a pipe that will be exposed to freezing, but I cannot heat trace it. I am considering putting in a control valve to drain the pipe when it is not active, but if there is a simple mechanical device it would save me a lot of controls dollars. The drain must be closed when the pump is on and open when the pump is off. So, the valve would open in the direction of flow under low pressure and close when that pressure increases.
Anybody know of any such gizmo? If so could you direct me to the manufacturer?
I have a pipe that will be exposed to freezing, but I cannot heat trace it. I am considering putting in a control valve to drain the pipe when it is not active, but if there is a simple mechanical device it would save me a lot of controls dollars. The drain must be closed when the pump is on and open when the pump is off. So, the valve would open in the direction of flow under low pressure and close when that pressure increases.
Anybody know of any such gizmo? If so could you direct me to the manufacturer?





RE: High Pressure Shutoff Valve?
RE: High Pressure Shutoff Valve?
RE: High Pressure Shutoff Valve?
RE: High Pressure Shutoff Valve?
http://www.rossvalve.com/home.html
RE: High Pressure Shutoff Valve?
They make a valve - AK-45 - that does exactly what you are looking for, opens at low pressure and closes on high, used for freeze protection.
check out: http://w
Joe Lambert
http://www.control-associates.com/
RE: High Pressure Shutoff Valve?
RE: High Pressure Shutoff Valve?
RE: High Pressure Shutoff Valve?
Steve