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The type selecting of fire pump
From;    Author:Stand originally


Oriental pump line of business---Shang Yan is smooth

? ? ? ? The fire protection that fountainhead of most fire control provides uses water, need fire control water pump to undertake pressurization, be opposite in order to satisfy when put out a fire hydraulic the demand that estimates with water. Because water pump is installed, safeguard certainly will of undeserved generation breakdown to affect put out a fire to come to help, cause needless loss. ? ? ? ?

? ? ? ? Fire control water pump and unripe vivid water pump and photograph of manufacturing water pump compare function to go up due higher demand, but the performance that our country shows a normative offset to prevent water pump and test ask to did not make more detailed special provision, cause fire control water pump to be not had when choose according to can be being checked, appeared a variety of problems. American NFPA20 is to the performance demand of fire pump: 150% what the largest flow of fire pump should be worth for the design, 65% what lift is not less than job of make choice of to order lift, 140% what the lift when shutting water pump orders lift at job of make choice of not quite, stabilized voltage pump discharge is 1, 2L/S, lift is fire pump lift 1.1, 1.2 times. ?

? ? ? ? At the same time the regulation goes out in fire pump should set on conduit measure with flowmeter, 175% what flowmeter should check discharge of water pump make choice of, fire pump is in a pressure table that the diameter should set to be more than 89mm on conduit. The proposal closes close a branch to consult the American standard fire pump design to our country, choose put forward to have specific aim, clearer demand more, so that be chosen in what offset prevents pump, detect have in the process according to can be being depended on.

? ? ? ? NFPA20 sets as follows to the function of fire pump: Of the flow that water pump gives discharge to be nodded for job of make choice of 150% when, 65% of the lift that the job that its lift is not less than make choice of orders, 140% what the lift when shutting water pump orders lift at job of make choice of not quite. Its are actual was to stipulate the function curve of water pump is a flowing curve. Our country standard does not have detailed regulation to fire control water pump, cause fire control water pump choose on have many discrepancy. The proposal designs the regulation of NFPA20 of the reference when personnel is being designed. ?

" expensive plan " and " build compasses " did not test a requirement to the function of fire control water pump, does NFPA20 set fire pump? In piece set on conduit measure with flowmeter. 175% what flowmeter should check discharge of water pump make choice of, fire pump is in a pressure table that the diameter should set to be more than 89mm on conduit, such water pump can check the performance of water pump in the round after installation, whether can so that be informed,satisfy design requirement. The proposal designs personnel to consider this issue in the design. ?
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