The advantages of air-operated diaphragm pumps are:
1. Due to the use of air as power, the flow rate is automatically adjusted with the change of back pressure (outlet resistance), which is suitable for medium and high viscosity fluids. The operating point of the centrifugal pump is set based on water. If it is used for a fluid with a slightly higher viscosity, it needs to be equipped with a reducer or a frequency conversion speed controller, and the cost will be greatly increased. The same is true for the gear pump.
2. Pneumatic pumps are reliable and low-cost in flammable and explosive environments, such as the transportation of fuel, gunpowder, and explosives, because: first, sparks cannot be generated after grounding; second, there is no heat generated during work, and the machine does not will overheat; third, the fluid will not overheat because the diaphragm pump has minimal agitation of the fluid.
3. In places with bad construction sites, such as construction sites, industrial and mining wastewater discharge, due to the many impurities and complex components in the sewage, the pipelines are easy to block, so that the electric pump will be overloaded, and the motor will be easily damaged due to heat. The air-operated diaphragm pump can pass particles and the flow rate is adjustable. When the pipeline is blocked, it will automatically stop until it is unobstructed.
4. Diaphragm pumps can be used to transport fluids with relatively unstable chemical properties, such as: photosensitive materials, flocculation fluids, etc. This is because the shear force of the diaphragm pump is low and has little physical impact on the material.
5. Diaphragm pump In the treatment of hazardous and corrosive materials, the diaphragm pump can completely separate the material from the outside world.
6. Diaphragm pumps or some tests ensure that no impurities contaminate raw materials. In addition, the diaphragm pump is small and easy to move, does not require a foundation, occupies a very small area, and is easy and economical to install. Can be used as a mobile material transfer pump.
The magnetic pump is a branch of the water pump field, and it is a new product that applies the working principle of the permanent magnetic coupling to the centrifugal pump. The magnetic pump consists of three parts: pump, magnetic drive and motor. The magnetic drive of the magnetic pump is composed of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials and drive the inner magnetic rotor connected to the impeller. It rotates synchronously to realize the non-contact synchronous transmission of power, and transforms the dynamic sealing structure that is easy to leak into a static sealing structure with zero leakage. Since the sliding bearing of the magnetic pump is lubricated by the conveyed medium, different materials should be used to make the bearing according to different media and operating conditions.
The advantages of the magnetic drive centrifugal pump include that there is no leakage at all, and there can be a large gap between the inner and outer rotors. When using a non-metallic spacer, the thickness is not more than 8mm, and when a metal spacer is used, the thickness is not more than 5mm. The wall thickness of the spacer is relatively thick. Large, the possibility of the isolation sleeve being worn out is small, and the gap between the isolation sleeve and the inner and outer magnetic rotors is also large. Set, easy to disassemble, can be replaced on site, easy to maintain, can be applied to SIC bearings, good wear resistance, long service life, the speed of the pump is not limited by the motor. It can be different from the speed of the motor. In addition, the magnetic centrifugal pump also has the following advantages:
1. Since the transmission shaft of the magnetic centrifugal pump does not need to penetrate the pump casing, but uses the magnetic field to drive the inner magnetic rotor through the magnetic field and the thin-walled transmission torque of the isolation sleeve, it fundamentally eliminates the leakage channel of the shaft seal and realizes complete sealing.
2. When the magnetic drive pump transmits power, it has the function of overload protection.
3. The magnetic material and magnetic circuit design of the magnetic pump have high requirements, and the technical requirements for the rest are not high.
4. The maintenance and repair workload of the magnetic drive pump is small.