Continue with the article of High Pressure Piston Pump Overview, Part A
5. Have a good self priming piston pump suction
Performance is not only good but also a good self-priming performance. Therefore, for most reciprocating pumps for irrigation is not necessary before you start the pump. Machine efficiency, energy saving..
6. High pressure piston pump
Theory of flow: Qt = AsnZ type in Qt flow pump theory; A plunger (or piston) of the cross-sectional area; S travel; n crank speed (or the number of times the plunger back and forth every minute ) Z Contact number (the number of plunger or piston) pump, the actual flow rate: Q = Qt-Q. Q-type pump in the flow; Qt flow pump theory; Q pump flow losses. The flow rate caused by the loss of factors: As the liquid volume compression or expansion caused by the loss; because when the valve is closed the volume loss caused by delay; as loose valve closed by sealing surface to the leak of the volume loss; by plunger , rod or piston to the leak of the volume loss.
7. Pump power effective power
The flat, the liquid is pumped from the pump discharge was known as the effective power of energy. Ne Ne = PQ type of effective power, P total pressure, Q flow. Incorporated into the unit after the formula becomes: Ne (KW) = 1/36.7 × P (Kgf/cm2) × Q (m3 / h).
Taking into account the efficiency of transmission, mechanical friction, volumetric efficiency, temperature rise caused by power loss and other reasons, choose the original motive power, the back and forth on the low pressure pump, N = 1 / (0.85 ~ 0.9) N; on High Pressure Reciprocating Pump, N = 1 / (0.75 ~ 0.85) N. The application of piston reciprocating pump is mainly suitable for high pressure low flow, the flow rate required constant or quantitative, in proportion to transport a variety of media, or require the inhalation of performance, or to request a self-priming occasions. In today's world of energy shortage situation, reciprocating pump, as energy-saving products, in the energy mining, oil and fine chemical, food and pharmaceutical processing and other industries has been widely used.
More complex structure of high pressure piston pumps, supporting strong and general poor, in variety and small quantities.