The BERMAD 700 Series large size control valves are hydraulically operated, diaphragm actuated type. Unique hydro-dynamic globe valve design with a special open plug provides high flow capabilities. The valves are available in the standard configuration or with an Independent Flow Check code “2S”. These valves are designed for large flow applications (On-off valve, pressure reducing, pressure sustaining, pump control, level control, check valve, flow control, burst control, emergency shut-off valve etc.), where precise control is needed.
Valve Pattern: Globe
Size Range: DN 500-1200; 20”-48”
Pressure Rating: PN10, 16 & 25 ANSI Class #150; ANSI Class #300 (Consult Factory)
End Connections: Flanged
Temperature: Water up to 80°C; 180°F
Coating: Fusion Bonded Epoxy, RAL 5005 (Blue) certified for drinking water applications, outside UV protection
Kv; Cv to Valve Travel Graph
The Independent Check Feature is an integral, lift type, non slam check mechanism that opens to allow flow in the required direction and smoothly closes drip tight to prevent back flow.
The Independent Check Feature is used on various system applications such as:
Line pressure applied to the upper control chamber of the valve creates a superior force that moves the valve to the closed position and provides drip tight sealing.
Discharging the pressure from the upper control chamber to atmosphere or some other lower pressure zone, causes the line pressure acting on the seal disk to move the valve to the open position.
The independent seal disc assembly closes as soon as differential pressure force across the valve is lower than the valve plug weight, preventing reverse flow through the valve regardless of control chamber pressure and the position of the diaphragm.