AB Valves - Model F5 -Butterfly Valve, Double Eccentric, Flanged Type with Bypass

this system (bypass) is used for making equal pressure in both side of the disc so the main valve can be operated with minimum force for opening and closing . this system can be used for filling up piping systems. As long as the pipeline system is protected from water Hummer phenomenon and the pipeline will fill up gradually and at the same time air will be ejected from pipeline (through air valves) without any disturbance and minimum sound.

Opening the valve: to start operation when the main valve and bypass valve are in closed position first open the bypass valve, and after opening the by pass valve the main valve will be opened. For transferring the liquid during operation time, both valves (main and bypass) should be open. Closing the valve: When system is not in use or the system has to be shut down, first main valve should be closed and then by pass valve will be closed.If the above procedure takes place, difficulties with air and water hummer will be reduced enormously.

• Product group : Butterfly Valves (BV)، 
• Fields of application : Water Distribution network، Water transmission، Industrial applications، Water treatment، 
• Medium : Drinking water، Sea water، Raw water، 
• Body : Aluminum Bronze ، Ductile Cast Iron، Nickel Aluminum Bronze، Stainless Steel، Carbon steel, low alloy steel، 
• Disc : Aluminum Bronze، Carbon steel, low alloy steel، Ductile Cast Iron، Stainless Steel، Nickel Aluminum Bronze، 
• Sealing : NBR، EPDM، 
• Temperature °C : Up to 70 
• Size (mm) : 400 - 1400 
• Pressure (bar) : 6- 40 
• Description : Face to Face: DIN EN 558-1 series 15 (DIN3202-F5)