Highlights of Split Body PTFE Fully Lined Lug Butterfly Valve
- Fully PTFE-Lined Body & Disc– PTFE lining protects the metal surfaces from corrosive media and minimizes metal-to-medium contact.
- Silicone-Reinforced Sealing – Silicone reinforcement behind the PTFE sealing area improves elasticity and helps maintain reliable sealing performance.
- Replaceable PTFE Seat Ring – The seat ring can be replaced independently, simplifying maintenance and extending the service life of the valve.
- Split-Body Design – Separate body construction provides easier access to the lining, seat ring, disc, and other internal components.
- Tight Shut-Off – The PTFE sealing structure provides dependable shut-off performance for demanding fluid-control applications.
Material Options of Lug Butterfly Valve
| 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 |
|
| 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 | |||
Standards of PTFE Lined Lug Butterfly Valve
| ITEM | Standard |
| Size Range | DN50-DN300 |
| 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 |
Parameters of Split Body Lug Butterfly Valve
| DN | L | E | F | Z | K | H |
|---|---|---|---|---|---|---|
| 50 | 43 | 134 | 68 | 50 | 9 | 25 |
| 65 | 46 | 145 | 75 | 50 | 9 | 25 |
| 80 | 46 | 150 | 85 | 50 | 9 | 25 |
| 100 | 52 | 160 | 95 | 70 | 11 | 25 |
| 125 | 56 | 178 | 115 | 70 | 14 | 25 |
| 150 | 56 | 197 | 130 | 70 | 14 | 25 |
| 200 | 60 | 239 | 160 | 102 | 17 | 30 |
| 250 | 68 | 278 | 200 | 102 | 22 | 30 |
| 300 | 78 | 315 | 230 | 125 | 22 | 30 |
Manufacture Process of Lug Butterfly Valve
Application of Fully Lined PTFE Butterfly Valve
- Chemical Processing – Suitable for acids, alkalis, solvents, and other chemically aggressive fluids.
- Water Treatment – Used in corrosive water-treatment processes, chemical dosing systems, and related piping.
- Chemical Storage & Transfer – Suitable for pipelines handling corrosive liquids during storage, transfer, and distribution.
- Pharmaceutical Processing – Applicable to fluid systems where corrosion-resistant wetted surfaces are required.
- Industrial Process Piping – Provides corrosion-resistant flow isolation for various industrial fluids.
- Electroplating & Surface Treatment – Suitable for process lines exposed to chemically aggressive solutions.
- Pulp & Paper – Used for selected chemical and process-fluid handling systems.
- Corrosive Fluid Distribution – Suitable for piping systems where conventional metal valve surfaces may be vulnerable to chemical attack.
Certificates of Zfa Valve-Chinese Valve Distributor
WRAS
CE
ISO 9001
EAC Russia
FAQ of Fully Lined PTFE Butterfly Valve
1. How does the silicone reinforcement structure improve sealing performance?
The silicone reinforcement structure located behind the PTFE sealing area provides additional elasticity and support to the sealing assembly. This helps maintain tighter contact between the PTFE sealing surface and the valve disc, thereby enhancing sealing reliability during valve operation.
2. What are the advantages of a replaceable PTFE seat?
The replaceable seat design allows for independent maintenance of the sealing components—particularly during refurbishment after long-term use—without the need to replace the entire valve. This is especially important in corrosive applications, where the sealing components may be subjected to harsher operating conditions than the valve body itself.
3. Why choose a split-body design over a traditional lined butterfly valve?
The split-body structure facilitates access to the internal lining and sealing components. This makes inspection, repair, and seat replacement more convenient, making it an ideal choice for applications where ease of maintenance is a priority.
4. What factors should be considered when selecting this valve for corrosive applications?
Key factors include media compatibility, operating temperature, pressure rating, valve size, disc material, and required sealing performance. ZFA can also evaluate actual operating conditions to assist in determining the appropriate configuration.
5. Can ZFA customize this PTFE-lined lug-style butterfly valve?
Yes. ZFA can collaborate with customers to develop customized configurations based on specific requirements regarding size, pressure rating, lining material, disc material, actuator configuration, connection standards, and other project specifications.
