Lining fluorine chemical pump application and selection of basic parameters of requirements

Chemical production, the transport of corrosive liquid fluorine-butterfly pump is gradually widely used, lining fluorine chemical pump outside using cast steel lined with fluoroplastic pump, strong corrosion resistance, so users in the use of lining fluoride water pump is the pump is very understand, what are the basic parameters of the pump, the parameters of the code is what? Fluorine-butterfly pump the main performance of basic parameters are the following: 1, lift H head pump is pumping unit weight of the liquid from the pump inlet ( suction flange) To the pump outlet ( outlet flange) The added value of energy. That is a Newtonian liquid through the effective pump energy. The unit is N· M/N = m, i. e. pump pumping liquid liquid column height, used meters for short. 2, traffic flow rate Q is to carry out pump in unit time the amount of liquid ( Volume or quality) 。 Volume flow using qq said, the unit is: m3 / s, m3 / h, l/s, etc. Mass flow rate in Qm, the unit is: t/h, kg/s, etc. Based on the relationship between mass flow rate and volume flow: Qm = & rho; In the Q type & rho; — — The density of the fluid ( 公斤/立方米,t / m3) , the normal temperature water & rho; =1000kg/m3。 3, is rotational speed n of pump shaft revolutions per unit time, with the symbol n said the unit is the r/min. 4, power and efficiency of the pump power is usually refers to the input power, the power of the prime mover to spread on the pump shaft, shaft power, is expressed in P; The effective power of the pump is also called the output power, expressed in Pe. Diaphragm pump unit time it is away from the pump effective energy of liquid in the water pump. Because head refers to the unit pump output of heavy liquid obtained from the pump energy effectively, so the head and the product of the mass flow rate and the acceleration of gravity, the per unit time is liquid obtained from the output of the pump effective energy & ndash; — Namely the effective power of the pump: Pe = & rho; gQH( W) =γ QH( W) In the type & rho; — — the liquid density ( kg/m3） ; γ — — liquid heavy ( N / m3) ; Q— — flow ( 立方米/秒) ; H— — lift ( m） ; g— — The acceleration of gravity ( m/s2) 。 The difference between the shaft power P and effective power Pe inside the pump for the loss of power, measured the size of pump efficiency. The efficiency of the pump for the effective power and the ratio of the shaft power, use & eta; Said. 5, NPSH NPSH NPSH is also called net positive suction head, is said main parameters of cavitation performance. NPSH domestic used & Delta; H says.
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