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Six Tips to understand Double Diaphragm Pumps

  1. These pumps can be constructed in materials ranging from Aluminium, Cast iron, Stainless steel, Polypropylene, Acetal, Kynar (PVDF) and certain sizes in Hastelloy wetted parts are available.
  2. The moving parts internally that come in contact with the fluid being transfered, can be a combination of many materials from Aluminium to PTFE.
  3. The pumps have an inlet or suction side where the fluid enters the pump, and an outlet or discharge side where the fluid leaves the pump.
  4. The fluid when leaving the pump, will be at a given fluid pressure, that suits the application.
  5. These Double Diaphragm pumps are often referred to as Diaphragm pumps, are driven by a supply of air from an air compressor and not driven by an electrical supply.
  6. The air supply to the pump is normally regulated to a certain pressure, usually around 3 to 4 Bar, the magority of pumps have a 1 to 1 ratio, this means if the air supply is 5 Bar then the fluid leaving the pump will be 5 Bar.

Technical Specifications and Ordering Information for Husky 3275 (pictured)

Fluid inlet and outlet size . . . . . . . . . . . . . . . . . . . . . 3″ (76.22 mm)
Maximum free flow delivery . . . . . . . . . . . . . .  . . . . 275 gpm (1,041 lpm)
Displacement per cycle . . . . . . . . . . . . . . . . . . . . . . . 2.0 gallon (7.6 liter)
Air inlet size . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 3/4” npt(f)
Air pressure operating range . . . . . . . . . . . . . . . . . . 20-120 psi (1.3-8 bar)
Maximum air consumption . . . . . . . . . . . . . . .. . . . . 325 scfm
Maximum size of pumpable solids . . . . . . . . . .. . . . 0.25 in (6.3 mm)
Maximum operating temperature . . . . . . . . . . . . . . PTFE 220ºF, Geolast 150ºF, Hytrel 150ºF
Typical sound level . . . . . . . . . . . . . . . . . . . . . . .. . . . .79 dBa
Instruction manual . . . . . . . . . . . . . . . . . . . . . .. . . . . .308639

Ordering Information for Husky 3275
Part Number Material of
Ported NPT Ported BSP Construction Seats Balls Diaphragm
DK3311 DKC311 Aluminum SST PTFE PTFE
DK3525 DKC525 Aluminum Hytrel Acetal Hytrel
DK3GGG DKCGGG Aluminum Geolast Geolast Geolast
Please consult the Process Equipment Buyer’s Guide (300435) for additional configurations.

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Double diaphragm pumps use the same 'enlarge/compress' process as single diaphragm pumps, but by running two Read More
These pumps can be constructed in materials ranging from Aluminium, Cast iron, Stainless steel, Polypropylene, Read More
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