May I ask what is the function and control of the exhaust valve on the backwash air pipe of a V-type filter?
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1. When the air-water backwash is over and only water flushing begins, it is necessary to open the exhaust valve to remove any remaining air. Does the exhaust valve remain open until the next backwash starts? If so, wouldn’t some water flow out through the exhaust pipe during the period of pure water flushing? If the valve is closed, how can we ensure that all the air in the pipe has been removed before it is closed? Thank you!! 2. Are the exhaust pipe for backwashing and the water pipe for backwashing connected through the same main pipe? In some places, they appear as separate tubes. 3. What does it mean that an air cushion layer is formed during air washing?
The bottom of the backwash air main should be above the highest water level in the filter tank – is this to prevent water from flowing back?
The bottom of the backwash air main should be above the highest water level in the filter tank – is this to prevent water from flowing back?
1. When the air-water backwashing is complete and pure water flushing begins, it is necessary to open the exhaust valve to remove any remaining air. Should this exhaust valve remain open until the next backwashing cycle starts? If so, wouldn’t some of the water flow out through the exhaust pipe during pure water flushing? If the valve is closed, how can we ensure that all the air in the pipe has been removed before it is closed? Thank you!! (After the air-water backwashing is finished, the exhaust solenoid valve is opened to release air; then water backwashing takes place, and after that, the exhaust solenoid valve is closed.)； During normal water flushing, the backflow gas valve is closed, so water does not flow back into the fan; however, some water is discharged through the exhaust solenoid valve. When water is discharged, it indicates that all the gas has been expelled. ) 2. Are the air pipe for backwashing and the water pipe for backwashing connected through the same main pipe? In some places, they appear as separate tubes. (Generally, they enter separately.) ) 3. What does it mean that an air cushion layer is formed during air washing? (I’m not sure about this either.) 4. The bottom of the backwash air main should be above the highest water level in the filter tank – is this to prevent water from flowing back? (With this consideration)
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