Paint Coating :
Electrostatic epoxy powder (RAL 5005 or 5015) with min. thickness 250 micron.
Application:
This system (bypass) is used for making equal pressure on both sides of the disc so the main valve can be operated with the 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 the water Hammer phenomenon and the pipeline will fill up gradually and at the same time air will be ejected from the pipeline (through air valves) without any disturbance and with minimum sound.
Operation:
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 bypass 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 the system is not in use or the system has to be shut down, the first main valve should be closed and then the bypass valve will be closed. If the above procedure takes place, difficulties with air and water hammer will be reduced enormously.
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