First, the product properties and uses: the characteristics of high-pressure piston pump 1. Instantaneous flow pulsation this is because the piston pump, the suction of the liquid medium and the discharge process is carried out alternately, and the piston in the displacement process, the speed of and constantly changing. In only one working chamber of the pump, the instantaneous flow rate of the pump is not only varies with time, but it is not continuous. With the increase in the working chamber, the instantaneous flow pulsation amplitude is getting smaller and smaller, and even practical use can be considered stable flow. (2) the average flow constant theoretically, pump flow depends only on the main structure of the pump parameters n (cycles per minute), S (piston stroke), D (piston diameter), Z (the Pistons number of), and discharge pressure independent and has nothing to do with the transmission medium temperature, viscosity and other physical and chemical properties. So that the flow rate of the pump is constant. Pump pressure vary depending on the characteristics of the pipe piston pump discharge pressure can not be limited by the pump itself, but depends on the characteristics of the pipe of the pump means, and has nothing to do with the flow. That is, if the conveying liquid is incompressible, then, in theory, can be considered a reciprocating pump can create any desired pump discharge pressure of the pump apparatus according to the characteristics of the pipe, the discharge pressure will not be subject to any restriction. Of course, all the reciprocating pump has a discharge pressure of the pump requirements, this is not to say the pump discharge pressure is not increased, but only that, due to the limit of the the original motif rated power and the pump itself, the structural strength, is not allowed in beyond the discharge pressure and others. 4 on the transmission medium can be transported a strong adaptability piston principle any medium, physical properties and chemical properties of almost from the media limit. Of course, since the fluid end materials and manufacturing processes as well as sealing technology limitations, sometimes encounter can not adapt to the situation. 5 good self-priming performance piston pump only have good suction performance, but also a good self-priming performance. Therefore, before starting for most reciprocating pump, usually without irrigation pumps. Machine, high efficiency, energy saving. 6 theoretical flow of high-pressure piston pump flow pump: Qt = the theoretical flow pump in the AsnZ ceremony Qt; cross-sectional area of ??the A plunger (piston); S stroke; n crankshaft speed (or plunger cycles per minute ) Z-linked (plunger or piston) pump flow rate: Q = Qt-Q. Where Q is the flow rate of the pump; the Qt pump theoretical flow; the Q pump flow loss. Cause the pump flow loss factors: the volume loss due to the lag caused by the valve when in the closed due to liquid compression or expansion caused by the volume loss;; plunger due to lax valve is closed, the volume loss caused by the leakage of the sealing surface; piston rod or piston ring leak caused by volume loss. 7 instantaneous pump flow