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.
| Specifications | |
| 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 | |
| Capabilities | |
| 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: | 25 psig (1.7 bar) – PTFE
10 psig (0.7 bar) – Santoprene |
| Maximum Particle Size: | 0.06″ (1.8 mm) |
| Sound Pressure: | 65.3 dB(A) |
| Operating Temperature: | Determined by elastomers |
| Construction | |
| 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) |




Applications
- Acids & Bases
- Plating Solutions
- Water & Wastewater
- Paints, Inks, Solvents
- Ceramic Slip & Glaze
- Lubricants & Oils
FT025 Plastic Manual PDF »
FT025 Plastic Technical Flyer PDF »
AODD Chemical Resistance Guide PDF »
Viscosity Chart »
Temperature Guide »
FTI Air Brochure PDF »