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    Diaphragm Pump Buying Guide

    The diaphragm pump peparates the liquid to be pumped, the movable column and the pump cylinder by means of a membrane, thereby it protects the movable column and the pump cylinder. The parts on the left side of the diaphragm that are in contact with the liquid are made of corrosion-resistant materials or coated with a layer of corrosion-resistant substances; the right side of the diaphragm is filled with water or oil. The choice of diaphragm pump is a very meticulous work, and you not only must have great professional theoretical knowledge, but also have rich practical experience. A good choice is not only conducive to the tuning of the PID parameters of the adjustment control loop, but also makes the adjusted parameters obtain a better control effect. It also greatly increases the service life of the diaphragm pump.

    Next, we will introduce you to air diaphragm pumps and electric diaphragm pumps to help you make a better choice when purchasing.

    Air Diaphragm Pump

    The air diaphragm pump is a new type of conveying machine, which uses compressed air as the power source, and uses the diaphragm in the cylinder to agitate back and forth to achieve the purpose of conveying various media. If you want to buy an air diaphragm pump, you need to know its advantages and its applications.

    Air operated double diaphragm pumpsThe advantages of air diaphragm pumps are:

    1. Because air is used as power, the flow is automatically adjusted with the change of back pressure (outlet resistance), which is suitable for medium and 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, it needs to be equipped with a reducer or a variable frequency governor, which will greatly increase the cost
    2. Air diaphragm pumps are low-cost and reliable in flammable and explosive environments, such as the transportation of fuel, gunpowder, and explosives. Here are reasons. Firstly, it is impossible to generate sparks after grounding. Secondly, no heat is generated during work, and the machine does not will overheat. Thirdly, the fluid will not overheat because the diaphragm pump has minimal agitation to the fluid.
    3. In harsh construction sites, such as construction sites, industrial and mining wastewater discharge, due to the large amount of impurities and complex components in the sewage, the pipeline is easy to block, which will cause an excessive load on the electric pump, and the motor will be easily damaged by heat. The air 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. It can be used to transport fluids with relatively unstable chemical properties, such as: photosensitive materials, flocculation liquid, etc. This is because of the low shear force of the diaphragm pump, which has little physical impact on the material.
    5. In the treatment of hazardous and corrosive materials, the diaphragm pump can completely separate the materials from the outside world.


    1. It can suck all kinds of sewage.
    2. It can pump various chemical corrosives, oil, mud, and clean grease.
    3. It can suck all kinds of highly toxic, flammable and volatile liquids.
    4. It can pump all kinds of strong acid, strong alkali and strong corrosive liquid.
    5. It can pump all kinds of high-temperature liquids, and the maximum temperature can withstand 150 ℃.
    6. It can be used as the front-stage pressure feeding equipment for various solid-liquid separation equipment.

    Electric Diaphragm Pump

    Electric diaphragm pump is a new type of pump. Due to the breakthrough in diaphragm material, it is used in petrochemical, ceramics, metallurgy and other industries. Directly separate the conveyed medium from the transmission mechanical parts, so the medium will never leak outward. Moreover, the pump itself has no shaft liquid seal, which greatly prolongs the service life.

    Electric diaphragm pumpsWhen buying an electric diaphragm pump, you need to understand its several advantages and applications.

    1. Electric diaphragm pump has the following four advantages
      Good flow performance. Particles, mud, etc. with a diameter of less than 10 mm can pass through effortlessly.
    2. No need to irrigate and divert water first. The chemical pump has a long capacity, which can reach more than 7 meters.
    3. There are many varieties. The over-current part of the pump body can be divided into cast iron, stainless steel, rubber-lined and aluminum alloy according to different user requirements. The self-priming pump motor can be divided into ordinary motor, explosion-proof motor and electromagnetic speed regulating motor.
    4. The electric diaphragm pump itself has no shaft seal, and its service life is greatly extended. According to different media, the diaphragm can be divided into neoprene, nitrile rubber, Teflon (F46), and so on. It can meet the needs of Different customer requirements.


    1. Suck peanut butter, pickles, mashed potatoes, red sausage, jam, apple syrup, chocolate, etc.
    2. Pumping paint, gum and pigment.
    3. All types of adhesives and glues can be pumped.
    4. All kinds of tile, porcelain and pottery glaze paste.
    5. After the oil well is drilled, pump the sediment and grouting.
    6. Pump all kinds of sewage.
    7. Pump various emulsions and fillers.
    8. Use the pump to clear the tanker and barge to absorb the sewage in the warehouse.
    9. Hops and baking powder slurry, syrup, molasses.
    10. Pump the accumulated water in mines, tunnels, beneficiation and slag.

    Above, we have introduced the advantages and applications of air diaphragm pumps and electric diaphragm pumps. We believe you have a better understanding of these two products. If you want to know more information or buy a diaphragm pump, please click on ATO website.

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