Basic knowledge of diaphragm pumps

Diaphragm pump is a new type of conveying machine. It is a kind of pump that is novel in China. The diaphragm pump uses compressed air as the power source. For various corrosive liquids, liquids with particles, high viscosity, volatile, flammable and highly toxic liquids can be exhausted.
The pneumatic diaphragm pump is available in four materials: plastic, aluminum alloy, cast iron, and stainless steel. The diaphragm pump uses nitrile rubber, neoprene rubber, fluororubber, polytetrafluoroethylene, and polytetraethylene ethylene according to different liquid media. To meet the needs of different users. It is placed in various special occasions to pump the medium that can not be pumped by conventional pumps, and has achieved satisfactory results.
First, the diaphragm pump is suitable for occasions
Because of pneumatic diaphragm pumps with the above characteristics, the diaphragm since the birth of the pump is gradually invade other markets, and occupies part of the world. For example, diaphragm pumps in the paint and ceramic industries have taken an absolute dominant position, while in other industries, environmental protection, wastewater treatment, construction, sewage, fine chemicals are expanding their market share, and other pumps are irreplaceable. Status. The advantages of pneumatic diaphragm pumps are:
1. Due to the use of air as the power, the flow rate is automatically adjusted with changes in back pressure (outlet resistance) and is suitable for medium to high viscosity fluids. The working point of the centrifugal pump is set on the basis of water. If it is used for a fluid with a slightly higher viscosity, a reducer or a frequency converter is required, and the cost is greatly improved. The same is true for the gear pump.
2. In the flammable and explosive environment, the pneumatic pump is reliable and low in cost, such as fuel and gunpowder transportation, because: *, it is impossible to generate spark after grounding; second, no heat is generated during work, the machine will not overheat; Third, the fluid will not overheat because the diaphragm pump 's agitation of the fluid is small.
3. In places with poor construction sites, such as construction site, industrial and mining wastewater discharge, due to the impurities in the sewage and complex components, the pipeline is prone to blockage, so that the load on the electric pump is too high, the motor is hot and vulnerable. The pneumatic diaphragm pump can pass through the particles and the flow rate is adjustable, and the pipe is automatically stopped to be unobstructed when the pipe is blocked.
4. In addition, the diaphragm pump is small in size and easy to move. It does not require a foundation, and it occupies a very small ground. It is simple and economical to install. Can be used as a mobile material transfer pump.
5. In the treatment of hazardous and corrosive materials, the diaphragm pump can completely separate the material from the outside world.
6, or in some tests to ensure that no impurities contaminated raw materials.
7, can be used to transport fluids with relatively unstable chemical properties, such as: photosensitive materials, flocculation liquids, etc. This is because the diaphragm pump has a low shear force and a small physical impact on the material.
Second, the working principle of pneumatic diaphragm pump 1, compressed air for power.
2, a reciprocating diaphragm deformation caused by the volume change of the positive displacement pump, which works similar piston pump, due to the characteristics of diaphragm pump works, diaphragm pump has the following characteristics:
(1) The pump will not overheat: the compressed air is used as the 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.
(2) The diaphragm pump does not generate electric spark: the pneumatic diaphragm pump does not use electric power for power, and prevents static spark after grounding. (3) The diaphragm pump can pass the liquid containing particles: because it is volumetric and the inlet is a ball valve, it is not easy to be Blocking.
(4) The shearing force of the diaphragm pump on the material is extremely low: how to suck in when working, so the agitation of the material is small, suitable for the transport of unstable substances. (5) The diaphragm pump flow can be adjusted, which can be used in materials. A throttle valve is installed at the outlet to regulate the flow.
(6) The diaphragm pump has a self-priming function.
(7) The diaphragm pump can be operated without any danger.
(8) Diaphragm pumps can be used for diving.
(9) Diaphragm pumps can transport a wide range of fluids, from low viscosity to high viscosity, and from corrosive to viscous.
(10) The diaphragm pump has no complicated control system and no cables, fuses, etc.

(11) Small size, light weight and easy to move.
(12) It is easy to maintain without lubrication, and it will not pollute the working environment due to dripping.
(13) The pump is always efficient and will not be degraded by wear.
(14) 100% energy utilization, when the outlet is closed, the pump automatically stops, the equipment moves, wears, overloads, and heats. (15) There is no dynamic seal, and maintenance is easy to avoid leakage. No dead point when working

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