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A diaphragm pump (also known as a Membrane pump, Air Operated Double Diaphragm Pump (AODD) or Pneumatic Diaphragm Pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflondiaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.
There are three main types of diaphragm pumps:
When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant.
Diaphragm pump characteristics:
The diaphragm pump was invented in 1857 by Jacob Edson. Full production of the first pumps began two years later under the name of the Edson Corporation, located in Boston, Massachusetts. The company continues to thrive today in New Bedford, Massachusetts. 
Small mechanically activated diaphragm pumps are also used as air compressors and as a source of low-grade vacuum. Compared to other compressors, these pumps are quiet, cheap and, most importantly, have no moving parts in the airstream. This allows them to be used without added lubrication in contact with the air, so the compressed air produced can be guaranteed clean.
Pneumatic diaphragm pump accessories:
1 metal pump: stainless steel, aluminum alloy, cast iron, carbon steel, ha's alloy pump body. 2 non metal pump: plastic polypropylene (PP), polyvinylidene fluoride (PVDF), pump body acetal and pure Teflon and other materials. Diaphragm; Teflon diaphragm, 177 DEG C high temperature resistant fluorine rubber diaphragm, hill rubber diaphragm, NBR rubber diaphragm, chloroprene rubber diaphragm and. 1 suitable for high, medium and low viscosity of various kinds of acid, alkali and corrosive fluids and various solvents in the chemical industry. 3. Apply to the precious liquid, the risk of damage, high corrosion resistance and other hazardous materials transportation, because pneumatic diaphragm pump with no dynamic sealing structure, completely separated from the outside world, no leakage; 4 for in harsh working conditions such as oil fields, mines, construction sites containing solid particles of the wastewater. 5. Suitable for use as a portable mobile situation under a variety of materials delivery, without foundation, covers an area of small, flexible, and the installation simple Ingersoll Rand air pneumatic diaphragm pump is mainly used in the following aspects: 1. The tanker / bus / train unloading material 2 large tank / tank transportation 3. Wastewater treatment 4. Chemical production. General conveyor / supply 6 packing / filling. Batch processing / mixed system. Rinse. Recycling / recovery. General purpose industrial and OEM complete sets of equipment. Maritime: (discharge and transport: 1 2 of the 3 sewage water). E: (emission and transportation: 1 2 3 strong acid alkali wastewater). Car: (for transfer: 2. 1. The sealant adhesive. Electroplating solvents. Paint) chemical production: (1. Soap. Cleaning agent. Clean / Polish. Paint / 7. 6. 5. Dye adhesive ink for shear sensitive materials) coal mine: (emissions: sewage water. 2. Mixing. Slurry) medicine: (food and drug materials, supply and delivery: 1.FDA material.1 best metal pump sales model: 1 inch 1/2 inch (PD05P-AAS-STTPD05P-ASS-STTPD05P-AAS-PCCPD05P-AAS-FTTPD05P-AAS-FAAPD05P-AAS-PTT) (666120-3C9-C666120-344-C666121-344-C666121-3EB-C666121-244-C666120-3EB-C) (666170-3EB-C666170-3C9-C666170-344-C666171-3EB-C666171-344-C666172-3EB-C) 1.5 inch 2 inch 3 inch (666250-9C9-C666250-EEB-C666252-EEB-C666270-EEB-C666271-244-C66627B-2EB-C) (666320-EEB-C, 666300-9C9-C666300-EEB-C666320-344-C666321-244-C666322-G22-C66632B-244-C) 2 best non metal pump sales model: 1/4 inch (PD02P-APS-PTAPD02P-APS-PTTPD02P-ADS-DTTPD02P-AKS-KTT) (66605J-38866605J-3EB66605J-34466605H-24466605K-44466605H-2A4) 1/2 inch 1 inch 1.5 inch (6661T3-3EB-C6661T3-344-C (6661A3-3EB-C6661A3-344-C6661B3-344-C6661A4-444-C6661B4-444-C) 6661U3-344-C6661U4-444-C) 2 inches (6662A3-3EB-C6662A3-344-C6662B3-344-C6662B4-444-C) 1 inch metal pump accessories: O-ring (Y325-14, Y328-24, Y325-126, Y327-126, Y328-12690534, Y330-113, Y325-20, Y325-214) manifold / liquid cover material: Aluminum (fluid cover 94945, manifold 92001, 92001-1) as well. Stainless steel (fluid cover 91045, manifold 91044, 91044-1, outlet manifold 92846, 92846-1, inlet manifold 92847, 92847-1, spring 22155). Cast iron (fluid cover 94277, manifold 94278, 94278-1). Gasket air side: (carbon steel 93441-2, stainless steel 93441-1). Washer fluid cavity side: 93441-1, 93441-2. Connecting rod: 98724-1. Motor body: 94743, 94741. Sleeve: 94527. Card spring: Y145-25. Adhesive pad: 92878, 92004. .U type sealing ring: Y186-51. Slide: 92005, 93047. Axial septum: 92876, 115959. Washers: 92006. Reversing lever: 93309-1. 1.5 inch metal pump accessories: O ring (Y325-16, Y328-16, Y325-230, Y327-230, Y220-23092761, Y330-117, Y325-126, Y325-214) manifold / liquid cover material: Aluminum (fluid cover 92750, manifold 92749, 92749-1). Stainless steel (fluid cover 92773, manifold 92774, 92774-1. Cast iron (fluid cap 92778, manifold 92777, 92777-1). Gasket air side: (carbon steel 92752, stainless steel 92775). Washer fluid cavity side: 92775, 92752. Connecting rod: 98720-1. Motor body: 94744. Sleeve: 94528. Card spring: Y145-26. U type sealing ring: Y186-51. Slide: 92005, 93047. Axial septum: 92876, 115959. Reversing lever: 93309-1. 2 inch metal pump accessories: O (Y325-24, Y325-222, Y325-134, Y330-117) manifold / liquid cover material: Aluminum (fluid cover 94945, manifold 92001, 92001-1). Stainless steel (fluid cover 91045, manifold 91044, 91044-1, outlet manifold 92846, 92846-1, inlet manifold 92847, 92847-1, spring 22155). Cast iron (fluid cover 94277, manifold 94278, 94278-1). Gasket air side: (carbon steel 93441-2, stainless steel 93441-1). Washer fluid cavity side: 93441-1, 93441-2. Connecting rod: 98724-1. Motor body: 94743, 94741. Sleeve: 94527. Card spring: Y145-25. Adhesive pad: 92878, 92004. .U type sealing ring: Y186-51. Slide: 92005, 93047. Axial septum: 92876, 115959. Washers: 92006. Reversing lever: 93309-1. 3 inch metal pump accessories: O ring (Y325-210, Y328-210, Y327-210, Y325-350, Y328-350, Y327-35094115, Y325-4, Y325-222, Y325-134,). Aluminum (washer fluid cavity side 94802, fluid cover 96430, inlet manifold 96429-1, 96429-2, outlet manifold 96428-1, 96428-2). (stainless steel washer fluid cavity side 94803, fluid outlet manifold 96649-1, cover 96650, 96649-2, 96654-1, 96654-2 of the inlet manifold (iron) washer liquid cavity side 94803, fluid inlet manifold cover 96638, 96636-1, 96636-2, 96637-1, 96637-2 air outlet manifold) side gasket: (carbon steel 94831-1, stainless steel diaphragm rod 96474, 94831-2) the motor body 96427, sleeve: 94528, U: Y186-55 type sealing ring, valve: 96421, reversing bar: 93309-2 0.5 inch non metal pump accessories: O ring (Y325-122, Y327-122, 93265, 93764, 93265, 93763, 93119, 93761, 93117, 94749, 95129, 93762, 93118, Y327-119, Y325-119, Y328-119, Y325-120, Y327-120, Y325-117, 93075, Y325-111) commonly used components in contact with solvent: polypropylene and PTFE shell (connecting rod 93084, washer 94645, diaphragm screw 93103-1 , 93103-4, fluid cover 93105-1, 93105-9 outlet collection tube 93102-1, 93102-4 bottom set tube 93106-4, 93106-1, ball isolation ring 93097-1, 93097-4, sleeve 93120-1, import collection tube 93802-1, 93802-3 outlet collection tube 93801-1, 93801-3) Ma Dati 93091, sleeve 93087, retaining ring 3728577802, shaft 93085, guide stem 93088, spacer ring 115959, valve group 93090, U-shaped ring 94395, 96383. 1 inch non metal pump accessories: O-ring (Y325-14, Y328-14, Y325-225, Y327-22593282293280930759328193279, Y325-220, Y327-220, Y325-214, Y325-126, Y330-113, Y325-20) and the solvent contact common parts: collecting duct / fluid cover material options (93239-1 diaphragm screws, 93239-2, fluid cover 93235, 93235-2 outlet collection pipe 93236, 93236-2 plate collection pipe 93237, 93237-2 imports set 95746, 95744, 95747, 95745, 95746-2, 95744-2, 95747, 95745) Ma Dati 94743, 94741, sleeve 94527, shaft 92005, 93047, U-shaped ring Y186-51, washer air side 93441-2, diaphragm rod 98724-1. 1.5 inch non metal pump accessories: O type circle (93075, shaft 98720-1 Y330-117, Y325-214, Y325-126, Y325-16, Y328-16, Y325-208, Y328-208, Y325-342, Y327-3429591095912, Y325-230, Y327-23093363-1, Y325-2492761) diaphragm, washer 92752, 93243-1 diaphragm screw, 93243-2, fluid cover 94905-1,93244-2.Outlet collecting pipe 93242-1, 93242-2 plate collection tube 93241-1, 93241-2 and motor body 94744, 94742, sleeve 94528, shaft 92005, 93047, guide rod 93309-2 2 inch non metal pump accessories: O type circle (shaft 98720-1 Y330-117, Y325-214, Y325-12693075, Y325-16, Y328-16, Y325-208, Y328-208, Y325-342, Y327-3429591095912, Y325-230, Y327-23093363-192761, Y325-24) diaphragm, washer 92752, 93243-1 diaphragm screw, 93243-2, fluid cover 94905-193244-2 and export collection pipe 93242-1, 93242-2 plate collection tube 93240-1, 93240-2 and motor body 94744, 94742, sleeve 94528, guide rod 93309-2