2”/51 mm Metallic Air Operated Double Diaphragm Pump

FTI Air Model FT20 pumps features a unique stall free air valve that is simple, rugged and reliable and requires no separate pilot valve or a mechanically operated pilot valve. Bolted construction provides leak-free fluid handling. Pumps are available with 316 stainless steel or aluminum wetted materials. Diaphragms, balls and seats are available in a wide range of materials to provide reliable operation in a wide variety of applications. FTI Air products have fewer parts, simpler design and are less prone to failure.

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


Dimensions & Weights
316 Stainless Steel Aluminum
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)
Weight: 130 lb (59.9 kg) 87 lb (39.5 kg)

thumbnail of FT20 metal curve

Please refer to manual below.

Manual Download


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