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Common problems in the purchase of pneumatic diaphragm pumps

- Sep 15, 2018 -

Common problems in the purchase of pneumatic diaphragm pumps

Common problems in the purchase of pneumatic diaphragm pumps, how to determine the type of diaphragm pump I want to buy?

While this may seem like a complicated issue, there are a few things to know and how to choose the right pump for a particular application.

Media: The most important factor for media when choosing a diaphragm pump. To avoid wear or corrosion, determine the chemical composition and consistency of the media. It is a clean liquid or a slurry, a semi-fluid mixture

Viscosity: The viscosity of the medium is an important factor in the pump selection process. Pumping equipment is required to move high viscosity fluids.

Flow: To choose the proper diaphragm pump, it is important to determine the flow rate, measured in gallons per minute (GPM) -- or simply, the diameter of the existing diaphragm pump. Usually if you are eager for higher flow, you need a large diameter diaphragm pump and a larger pipe size.

Pressure: The potential pressure conditions determined by the diaphragm pump outlet and inlet will help establish the correct equipment needed.

Temperature: The temperature of the medium determines the pump material that is best suited for the particular application.


What medium can the diaphragm pump deliver?

The diaphragm pump can deliver almost any medium. Some common examples of diaphragm pumps used are water, oil and acid.

Diaphragm pumps pump high viscosity fluids from adhesives and gear oils to body lotions, surfactants and resins. Rule of thumb: If it pours, it pumps. When pumping a viscous fluid, in some cases three times the pump port, use a large suction line. The pump should also be positioned close to, or even below, the liquid level. High viscosity fluids cause the pump to stroke at a slower rate; the air control valve of the pump that slows the air flow will keep the pump from stroking too fast.

Specific considerations for plastic diaphragm pumps

Plastic diaphragm pumps are best suited for applications involving chemicals such as acid, caustic method and bleach. Some chemicals are not suitable for, for example, styrene and some plastic pumps like isocyanate and polyol resins.

The common follow-up question is, "Don't always leak plastic pumps?" The answer is no; however, they should be regularly inspected and retightened, more often than metal or stainless steel pumps. The frequency of tightening depends on the application; pressure, hours of service, and fluid temperature all affect the flow of plastic. Remember that when the plastic material stream is compressed. Tightening your plastic diaphragm pump fasteners should be part of any preventive maintenance program based on pump service obligations.


How to repair the diaphragm pump

To avoid costly repairs and delays and keep your production going smoothly, you should implement a regular pump maintenance schedule. Good news: Air diaphragm pumps are very easy to clean and maintain, compared to other types of pumps, a large number of electrical components and components. Even better, in most cases, you only need a wrench and screwdriver to keep your pump in top working condition.

Air Quality: Pneumatic diaphragm pumps depend on the air being operated, air quality and air humidity are key to keeping your pump healthy. Regularly check the air filter to become dirty and clogged with poor air quality. In addition, moisture in the air should be monitored to ensure proper pump flow.

Elastic components: Check the elastic components of the pump every two months to prevent uneven wear.

Entrance/Store.. Always check your pump inlet/outlet, also known as the suction side discharge side. It is a common rock or other debris material to build and block the flow of the pump.

Torque setting .. Especially for plastic diaphragm pumps, the torque of the pump bolts should be checked regularly. Plastic parts can be compressed over time.

What facilities are used for diaphragm pumps?

Use a diaphragm pump. These include petrochemicals, metal manufacturing, mining, water, construction, cleaning, food and beverages, and printing and inks.

How does the diaphragm pump regulate the flow?

    Increase or decrease air pressure to ensure that you are operating within the pump.

Increase or decrease the valve used on the air volume air line.

Turns valve flow on or off.

There is only one firm warning when adjusting the flow.. It will not limit the smoothness of your pumping lines. Limiting the fluid line will cause your diaphragm to fail and start to empty, causing the part to wear quickly and create a vacuum void in the liquid pumping state.

How is the diaphragm pump suction?

Diaphragm pump suction depends on factors such as pump, fluid viscosity and whether you are looking for a wet or dry elevator. A safe, average range will be between 2 and 7 meters depending on the elastomer of the pump

Whether the diaphragm pump can be used for soaking work

This is a special usage. It is effective when it contains abrasive heavy particles in water. For example, metal particles and the like. However, the exhaust port should be piped out of the water. It is an important point to prevent water from leaking into the gas path during shutdown.


Add: No.658,20th Avenue,Hangzhou Economic & Technological Development Zone,Hangzhou,Zhejiang,China

Tel: 86-571-86878013

        86-571-86403988

        86-571-86400588

        8615058179600

Fax: 86-571-86408588

Code: 310018

E-mail: yangyang@depamu.com


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