As the name says, Diaphragm pumps use a diaphragm to create suction, pulling the fluid (high viscosity liquid or water with debris is okay) to fill the vacuum created when the diaphragm is expanded. Using check valves, the water is forced out the discharge hose when the motor compresses the diaphragm. With each cycle, the water is alternately sucked in and then discharged.
To create the vacuum, the diaphragm pump creates positive displacement with a combination of the reciprocating action of a rubber, thermoplastic or Teflon diaphragm and suitable non-return check valves to pump a fluid. Sometimes this type of pump is also called a membrane pump. A membrane made of elastomers or TFE, which flexes to produce pumping action.
The diaphragm is sealed with one side in the fluid to be pumped, and the other in air. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease, drawing in the fluid. A pair of non-return check valves prevent reverse flow of the fluid.
Diaphragm pumps: have good suction lift characteristics, have good dry running characteristics, are low-shear pumps, can handle highly viscous liquids, cause a pulsating flow.
Diaphragm Pump ManufacturersThe 15 Models below are made in USA by AMT with Honda or Briggs gasoline engine or Electric diaphragm pump with motor. We carry multiple manufacturers in addition to AMT, such as All-Flo, Whale, Hypro, and Tsurumi.
They are manufactured with a durable design with enclosed gears in oil bath, self-cleaning flow path, dry run without damage, and auto priming. Some models include built in polyurethane flapper/check valve assures self-priming to 20 feet providing steel suction strainer, two NPT hex nipples and wheel kit with 10" semi-pneumatic transport wheels for portability.
Diaphragm Pump ApplicationsGas, Diesel or Electric diaphragm pump, or mud pump sludge pump. Easily maneuverable, the gas diaphragm pump is built for performance; Ideal for seepage dewatering, high suction lift, cleaning septic tanks, pumping industrial waste and marine tanks, small wellpoint systems, and dewatering in sandy, muddy waters.
Diaphragm Mud pump Suction & discharge port size cannot be reduced. Cast aluminum construction with a thermoplastic rubber diaphragm. Also called a mudhog. 90 degree rotatable base on all models to fit through narrow gates. As an alternate in a centrifugal pump dredge pump design see 316F-95 2" mud pumps. Trash pumps, centrifugal Dredge Pump. Hoses and accessories.
WARNING: Do not use in explosive atmosphere or for pumping volatile flammable liquids.
See "Impeller No." in description for curve letter designation.
PP Air Operated Double Diaphragm Pump Bolted Series
PV-15$2,478.63PolyPro Air AODD Pump 1.5". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical 3/4" air inlet. Click here to Learn How to Size your Diaphragm Pump a...
Stainless Steel Diaphragm pump FDA
Stainless Steel Diaphragm pump, air / pneumatic, double
FDA Compliant double diaphragm Pumps are specifically engineered for food and cosmetic applications and are constructed with the FDA CFR Title 21 approved materials for food contact. Each ai...1/2" 316SS Learn More
Sanitary Stainless Steel Diaphragm pump
Standard Sanitary Pumps are the ideal solution for food processing and pharmaceutical applications. Our sanitary AODD pumps feature highly polished SS316 components (32 Ra), a swivel mounting stand and an energy-efficient, oil-free air valve syste...1/2" 316SS Learn More
Polypropylene Air Operated Double Diaphragm Pump
PB-20$3,024.75Polypropylene AODD Pump 2" NPT. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Models available in Alum, PVDF, Nylon, Conductive Nylon, Al and 31...2" PolyPro Learn More
Air Diaphragm pump Aluminum
A100-NAA-VVYV-000$1,272.00Aluminum Air AODD Pump 1". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Click here to Learn How to Size your Diaphragm Pump and for a Materi...Alum/Viton/1" Learn More
Air Double Diaphragm Pump Repair kit
AE-05 Wet End Kit$71.00Diaphragm pump wet end repair kit. Includes diaphragms (2), valves (4), orings. EPDM / SantopreneKIT Learn More
PVDF Air Operated Double Diaphragm Pump Bolted Series
C150-FPK-TTKT-B70$5,351.02PVDF Kynar Air AODD Pump 3/4". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Replaces KT-15 Click here to Learn How to Size your Diaphragm Pum...1-1/2" KT-15 PVDF Learn More
Air Diaphragm pump Aluminum
A100-NAA-TTYT-B30$1,180.61Aluminum Air AODD Pump 1". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Click here to Learn How to Size your Diaphragm Pump and for a Materi...Alum/ptfe/1" Learn More