Wuhan Spico Machinery & Electronics Co., Ltd.
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NFPA20 Fire Pump Set With Vertical Multistage Electric Motor Driven , Jockey Pump Set
A jockey pump is a pump connected to a fire sprinkler system and is intended to maintain pressure in a fire protection piping system to an artificially high level so that the operation of a single fire sprinkler will cause a pressure drop which will be sensed by the fire pump automatic controller, causing the fire pump to start. The jockey pump is essentially a portion of the fire pump's control system.
A jockey pump is sized for a flow less than the flow to one sprinkler in order to ensure a system pressure drop. Hence a jockey pump is an important part of the fire pumps control system. Jockey pumps are typically small multistage centrifugal pumps, and do not have to be listed or certified for fire system application. The control equipment for jockey pumps may however carry approvals.
Jockey pumps should be sized for 3% of the flow of the main fire pump and to provide 10psi more pressure than the main fire pump (As per Code IS 15105 : 2002) The application of a jockey pump in a fire protection system is provided by NFPA 20.
Operation conditions
Thin,clean,non-flammable and non-explosive liquid containing no solid granules and fibers.
Liquid temperature:
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| 1:Parameters including head ,flow, altitude, temperature, voltage, frequency (A deduction of 3 % from engine horsepower rating at standard SAE conditions shall be made for diesel engines for each 1000ft(305m) altitude above ft.(91.4m) engine horsepower rating as corrected to standard SAE conditions shall be made for diesel engines for every 10°F(5.6℃)above 77°F(25 ℃)ambient temperature.) |
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