¼”/6 mm Non-Metallic Air Operated Double Diaphragm Pump

FTI Air Model FT025 plastic 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 polypropylene, PVDF, or conductive polypropylene wetted materials. Diaphragms, balls and seats are available in a 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: 1/4” x 1/4”
Porting Location*: End
Connection Types: NPT / BSPT
Air Inlet & Air Exhaust Size: 1/8″ FNPT or BSPT
*Optional NPT or BSPT threaded center port location in either horizontal or vertical position


Maximum Flow Rate: 5.8 gpm (22 lpm)
Maximum Air Supply Pressure: 120 psi (8.3 bar)
Displacement Per Stroke: 0.005 gal (0.02 lit)
Minimum Air Inlet Pressure: 10 psig (0.7 bar) – PTFE

20 psig (1.4 bar) – Santoprene

Maximum Particle Size: 0.06″ (1.8 mm)
Sound Pressure: 65.3 dB(A)
Operating Temperature: Determined by elastomers


Wetted Materials: Polypropylene, PVDF, Conductive Polypropylene
Diaphragm Materials: Santoprene™, PTFE
Air Valve: GFRPP, Conductive Acetal
Ball Materials: Santoprene™, PTFE
Seat Materials: Polypropylene, PVDF, Carbon Filled PTFE
O-ring Materials Santoprene™, FEP/FKM


Dimensions & Weights
Maximum Height: 6-7/8” (174 mm)
Maximum Width: 5” (127 mm)
Maximum Depth: 6-5/8” (168 mm)
Weight – Polypropylene: 2.3 lb (1.0 kg)
Weight – PVDF: 3.1 lb (1.4 kg)

Please refer to manual below.

Manual Download


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