PRODUCT
PTFE lined butterfly valve gear type quality supplier and OEM/ODM factory
Specifications:
·
Size: DN50-DN300
·
Pressure: PN16/150LB
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Standard: Flange: DIN3202, DIN2501 PN10/PN16
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Face to face: BS5155,Top Flange: ISO5211
PTFE Lined Butterfly Valve
TWIV PTFE lined butterfly valves are designed for pipeline applications where corrosion resistance and reliable flow isolation are important. The valve features a PTFE or PFA lined seat and is available with different body materials and operating options to suit project requirements.
Typical applications include chemical processing, water and wastewater treatment, industrial fluid transfer, and pipelines handling compatible acids, alkalis, oils, and other process media. Actual suitability should be confirmed according to the medium composition, concentration, temperature, pressure, and material compatibility.
Product Overview
A PTFE lined butterfly valve uses a fluoropolymer lining or seat to provide a corrosion-resistant contact surface for compatible process fluids. The quarter-turn operating principle allows the disc to rotate to open, regulate, or shut off flow. Depending on the project, the valve can be supplied with manual, worm gear, pneumatic, or electric operation.
Body material options listed for this product include carbon steel, stainless steel, cast iron, ductile iron, and aluminum bronze. The disc material and sealing components should be selected to match the service conditions.
Technical Specifications
| Parameter | Class / Option 1 | Class / Option 2 |
|---|---|---|
| Nominal Pressure (MPa) | 1.0 | 1.6 |
| Nominal Diameter (mm) | 50-1000 | 50-1000 |
| Shell Test Pressure (MPa) | 1.5 | 2.4 |
| Seal Test Pressure (MPa) | 1.1 | 1.76 |
| Applicable Temperature | 150 (unit not specified in the supplied specification; confirm the temperature unit and actual valve rating before ordering) | |
| Applicable Medium | Water, sewage, seawater, air, vapor, food, medicine, oils, acids, alkalis, etc. Confirm compatibility with the selected lining and trim materials. | |
| Operating Mode | Manual, worm gear, pneumatic, electric, etc. | |
Note: The values above are transcribed from the supplied product information. Please confirm the final pressure, temperature, dimensions, and material configuration against the approved datasheet and project requirements.
Applicable Standards
| Design & Manufacture | Flange Connection | Face-to-Face Dimension | Test & Inspection |
|---|---|---|---|
| MSS SP-67 API 609 EN 593 |
DIN PN10/16/25 ANSI B16.1 BS 4504 ISO PN10/16 JIS B 2212/2213 BS 10 Table D / Table E |
API 609 ISO 5752 Series 20 BS 5155 |
API 598 |
Applicable standards and flange drilling should be confirmed for the specific valve size, pressure rating, and destination-market requirements.
Material Components
| No. | Part Name | Material |
|---|---|---|
| 1 | Body | Carbon Steel / Stainless Steel / Cast Iron / Ductile Iron / Aluminum Bronze |
| 2 | Disc | CF8M |
| 3 | Seat | PTFE / PFA |
| 4 | Stem | SS410 / SS416 / SS420 |
| 5 | Bushing | PTFE / Lubricating material |
| 6 | O-ring | EPDM / PTFE / Buna / NBR / Hypalon |
Material combinations may vary by model and service conditions. Please specify the medium and operating conditions when requesting a quotation.
Key Features of PTFE Lined Butterfly Valve
Corrosion Resistance
PTFE is resistant to many chemicals and solvents. The actual resistance depends on the chemical, concentration, temperature, pressure, and exposure conditions.
Wide Temperature Capability of PTFE Material
The supplied product information describes PTFE material properties at both elevated and cryogenic temperatures. These material properties should not be treated as the allowable operating-temperature range of the complete valve. Confirm the valve's rated temperature with the manufacturer.
Low Friction Surface
PTFE has a low coefficient of friction, helping provide a smooth, low-adhesion surface in suitable service conditions.
Flexible Actuation Options
Manual, worm gear, pneumatic, and electric operating options are listed. The actuator can be selected according to valve size, operating torque, control requirements, and site conditions.
Product Details
Typical Applications
PTFE lined butterfly valves can be considered for the following industrial pipeline services, subject to material compatibility and the confirmed operating range:
Chemical Processing
Pipeline isolation and flow control for compatible acids, alkalis, and chemical solutions in chemical production and transfer systems.
Water and Wastewater Treatment
Suitable system locations may include chemical dosing lines, treatment-process pipelines, and wastewater handling lines where the selected materials are compatible with the fluid.
Petrochemical and Oil Processing
Potential use in compatible process-fluid and chemical-transfer pipelines. Confirm the compatibility of the lining, seals, and body materials with the actual medium.
Industrial Fluid Transfer
Can be evaluated for pipelines conveying compatible oils, solvents, and other industrial fluids in manufacturing facilities.
Working Principle
A butterfly valve controls flow by rotating a disc mounted on a stem. When the disc is turned approximately a quarter turn to the open position, the flow passage is opened. Turning the disc toward the closed position places it across the flow path to restrict or shut off the medium. The actuator type determines how the stem is operated.
Frequently Asked Questions
What is a PTFE lined butterfly valve used for?
It is used for flow isolation or control in pipelines handling fluids compatible with the PTFE or PFA lining, including selected chemical, water-treatment, and industrial-fluid services.
What is the difference between PTFE and PFA lining?
PTFE and PFA are both fluoropolymers with chemical-resistance properties. Their detailed performance and processing characteristics differ. The suitable lining should be selected according to the medium and operating conditions.
Which operating modes are available?
The supplied specifications list manual, worm gear, pneumatic, and electric operating modes. Availability should be confirmed for the required valve size and configuration.
How do I select the correct valve material?
Provide the medium name, concentration, operating temperature, working pressure, nominal diameter, connection standard, and required actuation method. These details help determine a suitable body, disc, lining, and seal combination.
Request a Quote for PTFE Lined Butterfly Valve
Contact TWIV with your valve size, pressure rating, medium, temperature, flange standard, material requirements, and operating mode. Our team can review your application and provide product information for your project.
Tianjin TWIV Fluid Valve
Website: www.twivfluidvalve.com
Email: lucy@twivfluidvalve.com
