Hope someone could recommend me a appropriate mesh size for suction strainer of fire water pumps.
We have installed fire water pumps recently as bellows.
1) Main pump #1: 3,000 GPM (Driven by electric motor)
2) Main pump #2: 3,000 GPM (Driven by diesel engine)
3) Jockey pump : 300 GPM (Driven by electric motor)
*. Discharge pressure: 10Bar
*. Water tank capa': 5,000 M3 ( H: 20 METER, D: 18 METER)
The problem is the suction strainers on the pumps.
It's 40mesh strainer. During the 3 hours test run, the strainer clogged. We consider that the mesh size is not chosen properly.
I contacted the manufacture of the pumps and received the data as follows.
*Maximum passing sphere size through impeller, single stage:
Maker: Peerless , fire pump. cetrifugal
Motor pump: 0.95 inch (Pump model 10AEF20)
Engine pump: 1.38 inch (Pump model 8AEF15A)
With above data, it's very difficult for us to decide the appropriate mesh size for the pump.
Someone told me that NFPA does not allow suction strainer for the fire water pumps. Is that correct?
Regarding the water quality, it's relativeley clean.
The water is supplied from the make-up water for cooling water.
Many thanks in advance.
We have installed fire water pumps recently as bellows.
1) Main pump #1: 3,000 GPM (Driven by electric motor)
2) Main pump #2: 3,000 GPM (Driven by diesel engine)
3) Jockey pump : 300 GPM (Driven by electric motor)
*. Discharge pressure: 10Bar
*. Water tank capa': 5,000 M3 ( H: 20 METER, D: 18 METER)
The problem is the suction strainers on the pumps.
It's 40mesh strainer. During the 3 hours test run, the strainer clogged. We consider that the mesh size is not chosen properly.
I contacted the manufacture of the pumps and received the data as follows.
*Maximum passing sphere size through impeller, single stage:
Maker: Peerless , fire pump. cetrifugal
Motor pump: 0.95 inch (Pump model 10AEF20)
Engine pump: 1.38 inch (Pump model 8AEF15A)
With above data, it's very difficult for us to decide the appropriate mesh size for the pump.
Someone told me that NFPA does not allow suction strainer for the fire water pumps. Is that correct?
Regarding the water quality, it's relativeley clean.
The water is supplied from the make-up water for cooling water.
Many thanks in advance.
