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Diaphragm Pump Repair

Problems with diaphragm pumps can severely hurt the production of a facility.  When the pump stops working, the facility can’t move fluid, which causes production to halt and processes to stop.  This downtime is expensive – we understand that, and will work to get diaphragm pumps fixed as quickly as possible.


The diaphragm pump is used widely in many industries, manufacturing, and industrial facilities and can handle a very wide variety of liquids. Diaphragm pumps are in the category of positive displacement pumps as their flow rates do not differ much with the discharge or pressure. The pump is working against the given speed. Diaphragm pumps can transfer liquids with low, medium or high thicknesses and also liquids with a body material.

The diaphragm pump is derived from the rubber membrane that the pump uses to achieve its pumping action. The diaphragm works on an air displacement principle. The membrane is mechanically pushed and pulled in and out of a pumping chamber.

Diaphragm pumps are powerful process diaphragm pumps for a variety of applications.  They are best suited for critical high-pressure installations. Additionally, they can be used when the capability of classical metering pumps is exceeded. Troubleshooting diaphragm pumps can be difficult, but we can help.

Diaphragm Pumps is also known as Air operated double diaphragm Pump, a type of reciprocating positive displacement pump in which liquid is pumped by a reciprocating diaphragm driven by a solenoid, a mechanical drive, or a fluid drive. The other versions are air operated Pump has inlet and outlet check valves.

Diaphragm Pumps have good dry running characteristics; they can be up to 97% efficient. Diaphragm Pumps can handle highly viscous liquids.

Maintaining your Diaphragm Pump

In order to keep your production running smoothly and to avoid expensive repairs and delays, you need to have regular pump maintenance. Here’s IMS quick list of the most important maintenance task you should routinely do to keep you’re pumping on tip-top-shape.

Air quality – check the needle valve regularly. It may be clogged and dirty if the air quality is not good.

Torque settings – check on the torque on the bolts of your pump. The plastic components can shift and expand.

Inlets/outlets – you must examine routinely the inlet/outlet of your pump. Sometimes rocks and other materials can build up and clog pump flow.

Elastic components – we recommend that you check the elastic components every two months to ensure that these parts are wearing properly.

The most important things to remember is that you don’t have to be a specialist to maintain your pump; you just need to be consistent. You’ll need to keep your pump in top shape. For more maintenance information about diaphragm pumps, you can contact us. We can help you keep your pump running at its best cycle and beyond.


Diaphragm Pumps contain a reciprocating diaphragm and inlet and outlet check valves.


Diaphragm pumps have many applications in general plant service where the liquid is being pumped has high solid content or high viscosity.


Diaphragm Pumps handle a wide range of liquids, including liquids containing solids. The pump is seal-less and can run dry without damaging the pump.

Service offered by IMS is as follows:

  • We’re a one-stop-shop for diaphragm pump repair; we can also provide both the labor and the parts to get them fixed fast.
  • We work on all brands
  • We’re very competitive on our repair costs
  • We have extensive experience
  • We can generally provide a 24-hour turn-around time on repairs.

Diaphragm Pump Technology

Diaphragm pumps are utilizing the principle of hydraulic actuation of diaphragms. The plunger that moves induced by the crank gear acts on hydraulic fluid rather than the process fluid directly. The hydraulic fluid, in turn, displaces a freely moving diaphragm. This diaphragm acts as a hermetic seal that separates the hydraulic fluid from the pumped liquid. There are no dynamic seals between liquid and environment, consequently securing zero leakage much easier.

This pump use compressed air as their power supply. They also include two chambers with the diaphragm, inlet check valve and outlet check valve in each chamber. The air supply is shifted from one chamber to another with an air spool valve that is built into the pump.

The air valve directs the compressed air to the backup diaphragm number one. This way, diaphragm number one moves away from the center section. This diaphragm pump presses a stroke that will move the liquid out of the pump. At the same time, diaphragm number two is performing a suction stroke. The air behind diaphragm number two is being pushed out to the atmosphere.

Atmospheric pressure pushes the liquid to the suction side. The suction ball valve is being pushed away off its seat. This allows the fluid to flow through the ball valve into the liquid chamber.

IMS offer a variety of brands:

  • ARO diaphragm pumps
  • Sandpiper
  • All-flow

IMS can repair, rebuild, redesign, or upgrade your diaphragm pump to get it back in service as quick as possible with the reliability that you expect. We stand behind every rebuild or repair with our 100% workmanship guarantee.

IMS offers complete services and replacement parts for Diaphragm pump repair. Our state-of-the-art repair machining capabilities will ensure quick and reliable service. We also offer complete turn-key repairs including removal and installation. We strive to keep cost reasonable and downtime to a minimum. Every pump service by IMS is disassembled, carefully cleaned and meticulously inspected by well-trained technicians. An overhaul is then performed replacing all seals and other consumable parts.


Each diaphragm pump has its particular application and can handle extreme flows. Pumps are the real workhorses of the industrial pump world and are used in a wide range of industries. These include chemicals, food processing, paints, electronics, road construction, maintenance for industrial processes, electricity production facilities, food processing, wastewater and sludge processing, and mining.

Pumps are particularly versatile in being capable of pumping fluids from fluidized dry powder to shear-sensitive liquids, viscous liquids.

The diaphragm is a dynamic seal that converts the pneumatic pressure on one side to a fluid pressure on the other material to be pumped. Although the differential air pressure across the diaphragm and corresponding internal stresses are lower in comparison with similar stresses in mechanically driven diaphragm pumps that use the diaphragm to generate pressure.

For companies who want to carry out their own repairs, an ‘airside’ repair kit can be provided which contains components such as ball valves, diaphragm valve seats etc. that are in contact with the pumped fluid, and a ‘dry side’ kit which contains items such as a pump shaft, O-rings, gaskets etc.

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