The pneumatic diaphragm pump is a volumetric pump whose volume changes due to the reciprocating deformation of the diaphragm acid and alkali-resistant pump. Its working principle is similar to that of a plunger pump.

Due to the characteristics of the working principle of the diaphragm pump, the diaphragm pump has the following features:
- The pump will not be overheated: compressed air is used as power, and it is a process of expansion and heat absorption when exhausting. When the pneumatic pump works, the temperature is reduced, and no harmful gas is discharged.
- No electric sparks will be generated: the pneumatic diaphragm pump does not use electricity as power and prevents electrostatic sparks after grounding.
- It can pass through the particle-containing liquid: because it works positively and the inlet is a ball valve, it is not easy to block.
- The shear force on the material is meager: how to suck in and how to spit out when working, so the agitation of the material is minimal, and it is suitable for the transportation of unstable substances
- The flow can be adjusted, and a throttle valve can be installed at the material outlet to adjust the flow.
- It has the function of self-priming.
- It can be run dry without danger.
- Can work diving.
- The fluids that can be transported are extensive, from low-viscosity to high-viscosity, from corrosive to viscous.
- No complicated control system, no cables, fuses, etc.
- Small size, lightweight, easy to move.
- No lubrication is required, so maintenance is easy, and the working environment will not be polluted by dripping.
- The pump can always maintain high efficiency and will not be reduced due to wear and tear.
- 100% energy utilization, when the outlet is closed, the pump automatically stops, the equipment moves, wears, overloads, and heats up
- No dynamic seal, easy maintenance to avoid leakage. No dead spots when working.
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