One of the most popular equipment used in pumping applications is air-operated double diaphragm pumps. AODD Pumps are designed to be simple and inexpensive to maintain. Even so, an experienced plant maintenance manager will seek tips and tricks to improve Double Diaphragm Pump performance to reduce downtime and increase its lifespan.
Here are some simple tips to increase the lifespan of AODD Pumps:
1. Select the appropriate pump position within the system.
The position of a pump in the system is crucial to its performance and lifetime. This is because Double Diaphragm Pump may be utilized in three basic ways:
As a suction lift, AODD pumps are self-priming and can pull a suction lift to 32′ (9.8m), therefore the pump must be installed above the fluid, which is then drawn into the unit. Suction pipe length should be kept to a minimum. This will aid in priming and relieve stress on the pump’s diaphragms.
As submerged suction, pumps can be immersed in the fluid being pushed. Prior to submersion, however, confirm that all pump materials are compatible with the fluid and that the pump’s air exhaust is above the fluid level. If there are particulates in the fluid, be sure to utilize a suction screen. This guarantees that solids bigger than the pump’s capacity (pass) do not enter the unit.
As flooded suction: In this case, fluid pressure enters the AODD Pump, and the pump is located below the fluid being pushed. It is critical to position the pump as close to the fluid conduit as feasible and shorten the suction line. This will minimize diaphragm tension and valve ball chatter. Controlling the fluid pressure entering the suction side of the pump is also critical; ideally, it should be less than 10′ of pressure. If the intake pressure exceeds 10′ (3.04 m), you should contact the pump manufacturer.
2. Select the Right Pump Construction Materials
AODD pump material selection improves pump dependability, performance, and life, reducing downtime and improving profitability. However, certain fluid properties must be addressed when selecting a pump’s material:
- Temperature and Specific Gravity (product weight)
- Abrasiveness
- Viscosity
- Overall Chemical Compatibility
Understanding the pump’s external environment is equally important for an AODD pump’s lifespan. For example, if the surrounding environment contains fumes, the complete pump, including the air side, must be compatible. If the pump will be exposed to UV radiation from the sun, plastic pumps may not be appropriate. If you’re pumping abrasive material, you may want to use tougher casting and seat materials. In such cases, you should contact the pump’s manufacturer for more information.
3. Consider the compressed air supply.
Air filters/regulators contribute significantly to the performance of AODD pumps by preventing damp and dirty air from entering the pump. When outside air enters the compressor, it naturally includes moisture, which might freeze when it expands inside the pump. The ensuing ice may cause the pump to halt. Air filters/regulators safeguard the pump’s air valve by eliminating solid and liquid pollutants from the air lines and giving more accurate pump control.
The air filter/regulator can also assist you in starting the pump in a progressive, “soft” way, reducing stress on the pump’s components.
4. Control Pulsation by Pumping
Installing diaphragm pump surge suppressors effectively removes pump pulsation. It also delivers almost pulse-free discharge flow for more consistent pressure while reducing system vibration (vibration can damage the discharge system and loosen connections) and noise.
5. Install Liquid Level Controllers.
Liquid level controllers are completely air-driven (i.e., pneumatic) and ATEX-approved for easy, safe pump control, protecting Air-Operated Double Diaphragm Pump from inefficient dry operating situations. They effectively switch pumps on and off for infrequent use.
Common uses for liquid level controls include Sump Dewatering, Fluid Transfer & Tank Filling
A Bonus Tip for AODD Pump Maintenance:
Choose Replacement Parts Carefully:
When you need replacement components, order directly from the pump’s manufacturer. Manufacturers produce parts exclusively for their own pumps, which lowers downtime and the need for several maintenance sessions. Using new components from a different vendor also voids your pump’s warranty.
Final Words
AODD Pumps are a worthwhile investment if properly installed and maintained.
Nirmala Pumps and Equipments has been a leading manufacturer of high-quality air-operated double diaphragm pumps and replacement parts for a global client base. Our pumps come in a variety of sizes and flow rates. Contact us immediately to discuss your needs for any pumping solution.
Nirmala Pumps & Equipments
Nirmala Pumps & Equipments is an Indian company that manufactures and supplies pump systems, valves, strainers, and pneumatic pumps since 1989. We provide services to different industries, both domestically and internationally, such as citrus, distilling, wastewater treatment, and petroleum.
