Features of PTFE Lined CF8 Disc Butterfly Valve
- The internal PTFE (polytetrafluoroethylene) lining completely isolates the fluid medium from the WCB valve body, offering excellent resistance to strong acids, strong alkalis, and highly corrosive solvents.
- One-piece WCB (cast steel) valve body: Compared to split-body designs, this structure offers superior pressure resistance and structural integrity, capable of withstanding PN16 pressure ratings.
- PTFE-lined CF8 disc: The CF8 (304 stainless steel) disc ensures high mechanical strength and erosion resistance; the PTFE lining makes it ideal for handling sensitive media, maintaining purity while preventing contamination. Additionally, the smooth PTFE surface minimizes the risk of media buildup.
- Zero-leakage sealing and low operating torque: The resilient PTFE seat, combined with an elastic auxiliary sealing element, ensures bi-directional zero-leakage shut-off while reducing rotational friction for easier operation.
Basic Info of PTFE Fully Lined Butterfly Valve
Material
| Part Name | Material/Method |
| Body | Ductile Iron, Casting Iron, WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze |
| Disc | PTFE Fully Lined Ductile Iron, WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze |
| Seat | Rubber(EPDM/NBR/VITON), Nature Rubber, Silicon Rubber, PU, HNBR, Hypalon |
| Stem | 304, 316, 420(2Cr13), 431, 1.4462, 17-4PH, Monel |
| Actuator | Handlever, Worm Gear, Electric, Pneumatic |
Technical Parameters
| ITEM | Standard |
| Size Range | DN50-DN1200 |
| 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 |
| Tightness Test | ISO5208 | API598 | EN12266-1 |
Paraments of PTFE Fully Lined Butterfly Valve
| SIZE | øD | øD1 | L | H | H1 | H2 | ø2 | ø3 | 4-ød1 | T*T |
|---|---|---|---|---|---|---|---|---|---|---|
| DN50 | 76 | 53 | 42 | 30 | 140 | 60 | 70 | 90 | 10 | 11 |
| DN65 | 89.0 | 64.6 | 45 | 30 | 150 | 67 | 70 | 90 | 10 | 11 |
| DN80 | 104 | 79.1 | 45.0 | 30 | 160 | 87 | 70 | 90 | 10 | 11 |
| DN100 | 135.0 | 104.4 | 51 | 30 | 180 | 105 | 70 | 90 | 10 | 11 |
| DN125 | 159 | 123.3 | 55.0 | 30 | 190 | 118 | 70 | 90 | 10 | 14 |
| DN150 | 188 | 155.6 | 55.0 | 30 | 210 | 130 | 70 | 90 | 10 | 14 |
| DN200 | 238.2 | 202.5 | 59 | 35 | 235 | 166 | 102 | 125 | 12 | 17 |
| DN250 | 292.4 | 250.5 | 66.6 | 35 | 270 | 197 | 102 | 125 | 12 | 22 |
| DN300 | 344.2 | 301.6 | 76.5 | 35 | 305 | 231 | 102 | 125 | 12 | 22 |
| DN350 | 375.2 | 333.4 | 77 | 35 | 360 | 255 | 125 | 150 | 14 | 22 |
| DN400 | 439.5 | 389.6 | 101.5 | 50 | 381 | 293 | 140 | 175 | 18 | 27 |
| DN450 | 490.5 | 440.5 | 113.5 | 50 | 425 | 325 | 140 | 175 | 18 | 27 |
| DN500 | 535.4 | 491.6 | 126.2 | 50 | 470 | 363 | 140 | 175 | 18 | 36 |
| DN600 | 653.7 | 592.5 | 153.2 | 60 | 565 | 425 | 165 | 210 | 22 | 36 |
Manufacture Process of Butterfly Valve
Typical Application of PTFE Coated CF8 Disc Valve
- Chemical Processing
- Petrochemical & Refining
- Water & Wastewater Treatment
- Pulp & Paper Processing
- Mining & Mineral Processing
- Industrial Process Piping
- Corrosive Fluid Handling
Certificates of China Butterfly Valve Manufacturer-Zfa
WRAS
CE
ISO 9001
EAC Russia
FAQ of Split Body PTFE Butterfly Valve
1. What are the advantages of a one-piece design compared to a split-body PTFE valve?
A split-body PTFE butterfly valve design allows for seat replacement, whereas a one-piece WCB valve body offers superior structural integrity and pressure resistance. It minimizes potential leak points at body joints, making it ideal for critical high-pressure or high-purity piping applications.
2. Are there any special operating requirements for this PTFE lined CF8 disc butterfly valve?
The valve is operated via a 90-degree (quarter-turn) rotation. The continuous PTFE lining ensures that the fluid does not come into contact with any metal, thereby providing 100% corrosion protection for all internal metal components.
3. What are the maximum pressure and temperature limits?
Maximum pressure: Limited by the structural characteristics of the PTFE lining under mechanical load; a maximum pressure of PN16 is recommended.
Temperature range: Typically -10°C to 180°C, depending on the medium properties and operating conditions.
