Comparison of diaphragm pump selection, electric or pneumatic?
2020/09/08 14:10:21
Electric diaphragm pumpis a new type of pump. In recent years, due to breakthroughs made in diaphragm material, more and more industrialized countries in the world adopt this type of pump to replace some centrifugal pumps and screw pumps. It is used in petrochemical, ceramics, metallurgy and other industries. The product design is based on the prototype of ABEL company in the United States. This pump is suitable for low pressure, that is, the occasion where the outlet pressure is less than 3kgf/cm2. Air operated double diaphragm pump is a new type of conveying machinery, using compressed air as the power source, for all kinds of corrosive liquids, liquids with particles, high viscosity, volatile, flammable, highly toxic liquids, can be exhausted. The choice of the valve body type of the diaphragm pump The choice of the valve body is an important part of the selection of the diaphragm pump. There are many types of diaphragm pump valve bodies. Commonly used are straight single-seat, straight double-seat, angle, diaphragm, small flow, three-way, eccentric rotation, butterfly, sleeve, spherical, etc. 10 types. Before selecting a valve, carefully analyze the medium, process conditions and parameters of the control process, collect enough data, understand the system's requirements for the diaphragm pump, and determine the type of valve to be used based on the collected data. The action mode of the diaphragm pump is only available when the pneumatic actuator is selected, and its action mode is formed by the combination of the positive and negative effects of the actuator and the positive and negative effects of the valve. There are 4 types of combinations, namely, positive (air-to-close type), positive and negative (air-to-open type), anyway (air-to-open type), and reverse (air-to-close type). The diaphragm pump action mode formed by these four combinations has air There are two kinds of on and off. For the choice of diaphragm pump action mode, mainly consider from three aspects: a) process and production safety; b) the characteristics of the medium; c) ensure product quality and small economic loss.
