Here’s a pumping scenario:
You are coming off of a domestic hydrant at 1450gpm with 300 feet of 5 inch hose. The hose is connected to the pumper with a 6 inch connection and there is no pressure relief valve. The pump is set to work in pressure mode at 150psi. The pump is rated at 1250gpm. The engine is pumping out a 2 ½ inch discharge into 200 feet of 5 inch hose. After the first 100 feet there is a 5 inch gated wye (only using one half of the gate) then the additional 100 feet to another hydrant. The purpose of this hydrant is to feed an industrial site fire loop. The pressure on the fire loop is approx. 130psi.
Questions:
1. What gpm would you be flowing out of the pumper?
2. What would the gpm be going into the industrial hydrant?
3. What would be the gpm in volume mode at the same pressures?
4. What would be some recommendations to get at least 800 gpm at
the industrial hydrant with this setup?
5. Would it be better to use 2 sections of 2 ½ hose rather than
a 5 inch line or use 2 five inch lines coming off of 2 ½
discharges?
You are coming off of a domestic hydrant at 1450gpm with 300 feet of 5 inch hose. The hose is connected to the pumper with a 6 inch connection and there is no pressure relief valve. The pump is set to work in pressure mode at 150psi. The pump is rated at 1250gpm. The engine is pumping out a 2 ½ inch discharge into 200 feet of 5 inch hose. After the first 100 feet there is a 5 inch gated wye (only using one half of the gate) then the additional 100 feet to another hydrant. The purpose of this hydrant is to feed an industrial site fire loop. The pressure on the fire loop is approx. 130psi.
Questions:
1. What gpm would you be flowing out of the pumper?
2. What would the gpm be going into the industrial hydrant?
3. What would be the gpm in volume mode at the same pressures?
4. What would be some recommendations to get at least 800 gpm at
the industrial hydrant with this setup?
5. Would it be better to use 2 sections of 2 ½ hose rather than
a 5 inch line or use 2 five inch lines coming off of 2 ½
discharges?
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