Features of PTFE Seat Wafer DN32 Butterfly Valve
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1. PTFE exhibits excellent compatibility with a variety of media (acids, alkalis, solvents, water). Crucially, PTFE possesses strong corrosion resistance, making this valve suitable for corrosive media, even in environments where metal valve seats are easily corroded.
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2. The soft-seal design achieves airtight sealing under various operating conditions (ANSI Class VI or equivalent).
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3. Compared to lug or flanged valves, the wafer-type valve body is thinner and lighter, reducing installation space and weight.
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4. It can be installed between ASME/ANSI and DIN PN flanges without additional adapters.
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5. PTFE remains stable over a temperature range of -10 to 180 degrees Celsius and is compatible with most industrial fluids (please refer to the specific temperature limits in the specifications).
- 6. The CF8 valve plate, conforming to AISI 304 standards, exhibits strong corrosion resistance. Therefore, all components of PTFE Seat Wafer DN32 Butterfly Valve in contact with the media are designed to handle corrosive media.
- 7. Generally speaking, DN32 butterfly valve(1.5 inch) is not a very common size; ZFA can produce sizes from DN15 to DN600.
DN32 PTFE Seat Wafer Butterfly Valve Parts
| Parts | Ductile Iron type | WCB type | Stainless Steel Type | Duplex Stainless Steel Type |
|---|---|---|---|---|
| Body | Cast Iron(GG25) Ductile Iron(GGG40/50) |
A216 A217 A105(forged) |
SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M |
2205 2507 1.4529 |
| Disc | Ductile Iron with Ni coated Ductile Iron with nylon coated Ductile Iron with PTFE/EPDM lined Stainless Steel Duplex Stainless Steel Bronze |
SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M 2205 2507 1.4529 |
2205 2507 1.4529 |
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| Seat | NBR, EPDM, PTFE, Viton, Hypalon, Silicon, PFA | |||
| Stem | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel | Duplex Stainless Steel, Monel | ||
| Actuator | Hand Lever, Worm Gear, Electric, Pneumatic | |||
PTFE Wafer Butterfly Valve Standards
| ITEM | Standard |
| Design | EN593 | API609 |
| Face to Face | EN558 | ISO5752 | API608 | BS5155-4 |
| Top Flange | ISO5211 |
| Flange Drilling | PN6 | PN10 | PN16 | ASME B16.5 CL150 | JIS 10K |
| Pressure Rating | PN6 | PN10 | PN16 | PN25 | CL150 | JIS 10K |
| Tightness Test | ISO5208 | API598 | EN12266-1 |
Paraments of DN32 Wafer Butterfly Valve
| SIZE | D1 | D2 | D3 | N×φD | α° | F | G | A | B | C | E |
| DN50(2″) | 52.6 | 100 | 120.6 | 4×19 | 45 | 52 | 266.7 | 273 | 161 | 43 | 32 |
| DN100(4″) | 104 | 156 | 190.5 | 8×19 | 22.5 | 52 | 266.7 | 346 | 200 | 52.1 | 32 |
| DN150(6″) | 155.6 | 212 | 241.3 | 8×22. | 422.5 | 52 | 266.7 | 397 | 226 | 55.8 | 32 |
| DN200(8″) | 202.4 | 264 | 298.4 | 8×22. | 422.5 | 52 | 359 | 485 | 260 | 60.6 | 45 |
CF8 Disc PTFE Seat Wafer Butterfly Valve Applications
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Chemical Processing: Corrosive liquids, acids, alkalis, organic solvents.
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Water and Wastewater Treatment: Sludge treatment requiring low leakage and chemical resistance.
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Food, Beverage, and Pharmaceutical Industries: Suitable for applications with high hygiene and pollution control requirements.
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Industrial Piping Systems: Compressed air and inert gas lines (ensure the use of seat materials suitable for the gases).
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Laboratory and Research Facilities: Small-diameter piping requiring reliable isolation from various chemical media.
Limitations/Precautions
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Not suitable for high-temperature steam or highly abrasive slurries—PTFE soft seats may deform or wear.
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Operating temperature limits are lower than for metal seats.
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Generally suitable for low-pressure applications—not suitable for medium- or high-pressure piping.
Butterfly Valve Manufacture Process
ZFA Butterfly Valve Certificates
WRAS
CE
ISO 9001
EAC Russia
