China Suppliers Factory Stainless Steel Fully PTFE Lined Wafer Butterfly Valve for Corrosive Applications
Product Overview
A PTFE lined butterfly valve is a type of butterfly valve that uses a disc made of PTFE (polytetrafluoroethylene) to control the flow of fluid. PTFE is a type of plastic that is known for its chemical resistance, high temperature tolerance, and low friction properties. The PTFE lining is applied to the disc, which is attached to a stem that runs through the valve body. As the stem is rotated, the disc moves into and out of the flow path, allowing or blocking the flow of fluid. The main advantage of a PTFE lined butterfly valve is that it offers excellent chemical resistance against a wide range of acids, alkalis, and other chemicals. This makes it suitable for use in applications where the fluid being transported is highly corrosive or toxic. PTFE lined butterfly valves are available in a wide range of sizes and pressure ratings, and can be made from materials such as carbon steel, stainless steel, and alloy steels. They are also available in different designs, such as wafer, lug and double flange, and also with different types of actuators and accessories to meet specific requirements. PTFE lined butterfly valves are known for its tight shut off and are available in both manual and actuated (pneumatic or electric) operation. They are also suitable for use in a wide range of temperatures, making them suitable for use in a variety of industries such as chemical, petrochemical, pharmaceutical, and power generation. They are also suitable for use in high-purity applications, as PTFE is highly resistant to contamination and does not release any toxic substances into the fluid.
Product Features
1
PTFE can be applied to highly corrosive chemical media.
2
It adopts a split design, making disassembly and replacement of parts more convenient.
3
The upper and lower cover design effectively prevents leakage.
4
The product has a wide range of applications: chemical industry, pharmaceuticals, food, papermaking, etc.
Technical Specifications
Working Temperature: -20~200℃
Pressure Test
| Pressure test | PN10 | PN16 | |
|---|---|---|---|
| Shell | 15bar | 24bar | |
| Seal | Water | 11bar | 17.6bar |
| Air | 6bar | 6bar | |
Material for Main Parts
| No. | Part Name | Materials | No. | Part Name | Materials |
|---|---|---|---|---|---|
| 1 | Cover | DI | 9 | Junk ring | Q235 |
| 2 | Bottom body | DI | 10 | Spring plate | Steel |
| 3 | Pressing sleeve | Q235 | 11 | Upper body | DI |
| 4 | O ring | EPDM | 12 | Pressing sleeve | Q235 |
| 5 | Seat | EPDM | 13 | Gland | DI |
| 6 | Disc | DI+EPDM | 14 | Gasket | Silicone |
| 7 | Upper shaft | SS410 | 15 | Wormgear | DI |
| 8 | O ring | EPDM |
Dimension (mm)
| DN | L | A | B | ∅F | n-∅d1 | S | H | PN10 | PN16 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ∅D | ∅D1 | N-∅d | ∅D | ∅D1 | N-∅d | ||||||||
| 50 | 43 | 122 | 71 | 70 | 4-∅10 | 11 | 25 | 165 | 125 | 4-18 | 165 | 125 | 4-18 |
| 65 | 46 | 132 | 81 | 70 | 4-∅10 | 11 | 25 | 185 | 145 | 8-18 | 185 | 145 | 8-18 |
| 80 | 46 | 142 | 90 | 70 | 4-∅10 | 14 | 25 | 200 | 160 | 8-18 | 200 | 160 | 8-18 |
| 100 | 52 | 158 | 105 | 70 | 4-∅10 | 14 | 28 | 220 | 180 | 8-18 | 220 | 180 | 8-18 |
| 125 | 56 | 172 | 122 | 70 | 4-∅10 | 14 | 28 | 250 | 210 | 8-18 | 250 | 210 | 8-18 |
| 150 | 56 | 190 | 136 | 102 | 4-∅12 | 17 | 28 | 285 | 240 | 8-22 | 285 | 240 | 8-22 |
| 200 | 60 | 225 | 168 | 102 | 4-∅12 | 17 | 35 | 340 | 295 | 8-22 | 340 | 295 | 12-22 |
| 250 | 68 | 258 | 202 | 125 | 4-∅14 | 22 | 40 | 395 | 350 | 12-22 | 405 | 355 | 12-26 |
| 300 | 78 | 293 | 236 | 140 | 4-∅18 | 27 | 40 | 445 | 400 | 12-22 | 460 | 410 | 12-26 |
| 350 | 78 | 335 | 263 | 140 | 4-∅18 | 27 | 40 | 505 | 460 | 16-22 | 520 | 470 | 16-26 |
| 400 | 102 | 365 | 303 | 140 | 4-∅18 | 27 | 50 | 565 | 515 | 16-26 | 580 | 525 | 16-30 |
| 450 | 114 | 422 | 327 | 165 | 4-∅22 | 32 | 50 | 615 | 565 | 20-26 | 640 | 585 | 20-30 |
| 500 | 127 | 453 | 366 | 165 | 4-∅22 | 32 | 60 | 670 | 620 | 20-26 | 715 | 650 | 20-33 |
| 600 | 154 | 531 | 426 | 254 | 8-∅18 | 40 | 70 | 780 | 725 | 20-30 | 840 | 770 | 20-36 |
Frequently Asked Questions (FAQ)
What is a PTFE lined butterfly valve?
A PTFE lined butterfly valve is a type of valve that uses a disc made of PTFE (polytetrafluoroethylene) to control the flow of fluid. It is highly valued for its chemical resistance, high temperature tolerance, and low friction properties.
What industries are these valves suitable for?
These valves have a wide range of applications and are suitable for industries such as chemical, petrochemical, pharmaceutical, food processing, papermaking, and power generation.
What is the working temperature range of the valve?
The working temperature for this PTFE lined butterfly valve is between -20℃ and 200℃.
Why is PTFE used for the lining?
PTFE offers excellent chemical resistance against a wide range of highly corrosive acids, alkalis, and other chemicals. It is also resistant to contamination, making it ideal for high-purity applications without releasing toxic substances into the fluid.
How does the design make maintenance easier?
The valve adopts a split design, which makes the disassembly and replacement of parts much more convenient. Additionally, the upper and lower cover design effectively prevents leakage.
What types of operation or actuators are available?
The PTFE lined butterfly valves are known for their tight shut-off and are available in both manual and actuated (pneumatic or electric) operation to meet specific requirements.