Automatic Control Valves
Hydraulic Check Valve
BTA 811
Function:
It permits the main valve to be fully open when inlet pressure exceeds outlet pressure in the normal direction and main valve close drip-tight on reverse flow. Opening and closing speeds are separately adjustable.
Operation:
The Valve Operates on the differential between two pressure : upstream or inlet pressure acting under the seat of the valve , and downstream or outlet pressure acting on the diaphragm via single hydraulic line. When upstream pressure is greater of the forward flow , the valve opens at an adjustable rate to allow flow. When downstream pressure is greater , the valve is forced fully closed.