FTI 2”/51 mm Metallic Air Operated Double Diaphragm Pump

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FTI 2”/51 mm Metallic Air Operated Double Diaphragm Pump

The stall-free air valve on FTI Model FT20 pumps is distinctive, easy to use, durable, and reliable, and it eliminates the need for a mechanically operated or separate pilot valve. Fluid handling is leak-free due to bolted construction. Pumps are offered with wetted materials made of 316 stainless steel or aluminium. For dependable performance in a wide range of applications, diaphragms, balls, and seats are offered in a variety of materials. Products from FTI have fewer parts, a simpler design, and are less likely to malfunction.

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  • Specifications
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Suction & Discharge Size: 2” x 2”
Porting Location: Center
Connection Types: FNPT, BSPT, ANSI/DIN/ISO flange*
Air Inlet & Air Exhaust Size: ¾” FNPT x ¾” FNPT
*ANSI/DIN/ISO flange connection available for SS models only

Maximum Flow Rate:

156 gpm (590 lpm)

Maximum Air Supply Pressure:

120 psi (8.3 bar)

Displacement Per Stroke:

0.31 gal (1.2 lit)

Minimum Air Inlet Pressure:

10 psig (0.7 bar)

Maximum Particle Size:

0.35” (8.9 mm)

Sound Pressure:

77 dB(A)

Operating Temperature:

Determined by elastomers

Wetted Materials:

316SS or Aluminum

Diaphragm Materials:

Neoprene, Santoprene™, FKM, EPDM, PTFE, Buna, Hytrel®, or polyurethane

Air Valve:

GFRPP, Aluminum

Ball Materials:

Neoprene, Buna, Santoprene™, FKM, EPDM, or PTFE

Seat Materials:

Aluminum, 316SS, PTFE, Hytrel®, Buna, Neoprene, FKM, EPDM, Santoprene™, or polyurethane

O-ring Materials

Neoprene, Buna, FKM, EPDM, PTFE, or FEP/FKM

316 Stainless Steel



Maximum Height:

30-3/32” (765 mm)

28-7/8” (733 mm)

Maximum Width:

20-15/32” (520 mm)

20-7/8” (530 mm)

Maximum Depth:

12-27/32” (326 mm)

12-27/32” (326 mm)


130 lb (59.9 kg)

87 lb (39.5 kg)

  • Acids & Bases
  • Plating Solutions
  • Water & Wastewater
  • Paints, Inks, Solvents
  • Ceramic Slip & Glaze
  • Lubricants & Oils

Performance curve

  • Filter/Regulator
  • Pulsation Dampeners
  • AODDampener

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