What are Double Diaphragm Pumps Used For?

With the ability to smoothly pump viscous liquids containing abrasive solids or air, double diaphragm pumps are workhorse solutions across industries. Their durable air-powered design handles tough pumping jobs other types struggle with. 

• Handle viscous liquids, abrasives, and air-entrained fluids
• Used in industrial, food, hazardous, agricultural, and energy applications
• Provide gentle transfer, chemical resistance, and intrinsic safety

Let’s explore key applications taking advantage of their unique benefits.

Double Diaphragm Pumps – Key Applications

Here are some of key applications of a double diaphragm pump in different industries:

Industrial Applications

Double diaphragm pumps shine for industrial duties moving corrosive chemicals, wastewater, sludges, and viscous pastes. Benefits like chemical resistance, dry run ability, and gentle transfer make them ideal for:

• Transferring acids, solvents, and chemical reagents from storage to process lines
• Pumping wastewater sludge between treatment stages
• Emptying chemical holding and process tanks for maintenance
• Draining sumps and pits containing viscous oil or sludge
• Transferring high solids content liquids like greases, glues, and pastes between vessels

The self-priming ability also suits intermittent transfer needs without lag, while an air motor design prevents contact with pumped media. Double diaphragm pumps keep industrial processes flowing reliably and safely.

Food and Beverage Applications

For food, beverage, and dairy applications, double diaphragm pumps provide smooth, reliable transfer without contamination:

• Pumping viscous batters, doughs, sauces, and purées gently to avoid separation
• Transferring fruits and vegetables without damage prior to processing
• Moving high fat content milk and cream without separating emulsions
• Pumping chocolate, candy melts, and sugary mixes gently to preserve properties
• Transferring beer, wine, and spirits between fermentation and storage tanks

With wetted parts like Teflon diaphragms and casing liners that resist sticking, these pumps prevent batch contamination. Their gentle transfer and CIP/SIP cleaning compatibility maintain product quality.

Hazardous Environment Pumping

Thanks to their pneumatic power source, double diaphragm pumps pose no ignition hazard when transferring flammable liquids like solvents and gasoline. Their intrinsic safety makes them ideal for:

• Fuel transfer at chemical plants, refineries, and storage facilities
• Draining solvents, paints, and adhesives from mixing and coating equipment
• Pumping kerosene, lighter fluid, and liquid propane at production facilities
• Transferring alcohol-based products like cleaners and hand sanitizers

By eliminating ignition sources, double diaphragm pumps bring explosion-proof pumping to hazardous locations that motor-driven pumps can’t access. Their flexibility and safety manage the widest range of combustible fluids.

Agricultural and Environmental Use

In agricultural spraying, irrigation, aquaculture, and environmental applications, double diaphragm pumps are valued for handling water with suspended debris and algae without clogging. Applications include:

• Transferring water from ponds for crop spraying and irrigation
• Dosing fertilizer and chemical injectors in irrigation lines
• Aerating fish farming ponds by pumping water into spray nozzles
• Circulating water through greenhouse misting systems
• Sampling lakes, streams, and stormwater runoff containing algae and debris

The self-priming, dry run safe design stands up to dirty water and intermittent flow while an air motor prevents chemical contamination. Double diaphragm pumps support reliable agricultural and environmental water needs.

Energy and Fuel Transfer

Lastly, double diaphragm pumps reliably handle fuels from petroleum products to viscous crude oil in energy applications:

• Loading and unloading tanker trucks and rail cars at depots
• Transferring crude oil from wells to storage and processing
• Filling diesel and kerosene tanks for generators and equipment
• Offloading marine tankers at port facilities
• Transferring asphalt, bitumen, and bunker fuels between tanks and transport

The gentle transfer prevents shearing of viscous oils. Chemical resistance suits corrosive fuels, while air power design enables operation anywhere. Double diaphragm pumps have the flexibility and durability to take on any fuel transfer need.

Conclusion

With the unique ability to pump abrasive, viscous, and air-entrained liquids cleanly and safely, double diaphragm pumps tackle challenging transfer jobs across sectors. Their optimized design makes them versatile solutions for any tough pumping application. Partner up with Aocheng Today to get the industrial grade double diaphragm pump.