| | Valve Manifolds | The diagrams shown opposite presents the valve manifold arrangement of standard pressure sand filters.- The diagrams show 5 valves, valve E is used for the rinse phase and should always be included.
- The diagrams show the valve positions during the Run phase, Back-wash and Rinse Phase.
- Note.. it is very important to insure that the manifold in properly supported, do not hang the manifold and valves from the filter flanges.
- The pipe work used should match the flange sizes.
- Filters should be sequentially back-washed one at a time. If two or more filters are back-washed at the same time, the waste discharge pipe size must be increased to accommodate the flow of water, or a buffer tank is used.
- Maximum back-wash water pressure is 0.5 bar, do not exceed this pressure
- Waste back-wash water pipe work and manifolds should drop down below the valve manifold.
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