PRODUCT
Alloy 20 Disc PTFE Lined Wafer Butterfly Valve with Worm Gear - 6 Inch
Size: DN50-DN1000
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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 Wafer Butterfly Valve – 6 Inch 150LB Alloy 20 Disc Butterfly Valve with Worm Gear Operator
Wholesale and custom PTFE lined butterfly valves from a professional China industrial valve manufacturer. This corrosion-resistant wafer type butterfly valve is designed for chemical processing, water treatment, seawater service, pharmaceutical production and other industrial piping applications. Contact us for technical details, configuration options and a quotation.
High-Performance PTFE Lined Wafer Butterfly Valve for Corrosive Media
Engineered for demanding industrial environments, this 6-inch PTFE lined wafer butterfly valve is designed for applications involving corrosive media. The featured configuration combines an Alloy 20 disc with a chemical-resistant PTFE seat, providing corrosion resistance and reliable shut-off when the materials are correctly selected for the process medium, temperature and pressure.
This 150LB butterfly valve is equipped with a worm gear operator for controlled manual operation. Its compact wafer-style body is installed between compatible pipe flanges, helping save installation space in industrial pipeline systems. Before ordering, please confirm the applicable flange standard, pressure class, face-to-face dimensions and operating conditions.
Key Features
- PTFE seat for resistance to a wide range of acids, alkalis and chemical media, subject to compatibility checks.
- Alloy 20 disc option for selected corrosive and chloride-containing services.
- Wafer-type construction for compact installation between compatible pipeline flanges.
- Worm gear operator for controlled manual opening and closing.
- Quarter-turn operation for pipeline isolation and suitable flow regulation duties.
- Optional lever, pneumatic actuator or electric actuator configurations, subject to model and size.
- Custom material, coating, connection and actuator options can be discussed according to project requirements.
PTFE Seat and Alloy 20 Disc Material Advantages
PTFE Seat for Chemical Resistance
PTFE (polytetrafluoroethylene), commonly known by the trade name Teflon, is used as a sealing material in valves because of its low friction and broad chemical resistance. It is suitable for many acid, alkali and solvent applications. Actual compatibility depends on the chemical concentration, operating temperature, pressure, permeation characteristics and service conditions. The allowable temperature range of the complete valve must be confirmed from the selected seat design and manufacturer data.
Alloy 20 Disc for Selected Corrosive Services
Alloy 20 is a nickel-iron-chromium alloy developed for corrosion resistance in selected chemical environments. It is used in some applications involving sulfuric acid and other corrosive process media. Its suitability is not universal: confirm the exact medium composition, concentration, temperature and flow conditions with the valve supplier before specifying the disc material.
Typical Applications of PTFE Lined Wafer Butterfly Valves
PTFE lined wafer butterfly valves can be considered for pipeline isolation and suitable flow-control duties where the selected lining, disc, stem and body materials are compatible with the process conditions.
PTFE Wafer Butterfly Valve Technical Specifications
The following table summarizes the configuration information supplied for this product range. Confirm the exact rating, size, test values and temperature limits for the selected model before purchase.
| Nominal Pressure | PN10 / PN16; 150LB configuration subject to model verification |
|---|---|
| Nominal Diameter | DN50–DN1000 (2"–40"), subject to product-series availability |
| Shell Test Pressure | 1.5 MPa for PN10; 2.4 MPa for PN16, where applicable to the selected design |
| Seat Test Pressure | 1.1 MPa for PN10; 1.76 MPa for PN16, where applicable to the selected design |
| Applicable Temperature | To be confirmed according to the PTFE seat design, pressure rating, medium and manufacturer-approved operating limits |
| Applicable Medium | Water, wastewater, seawater and selected chemical media, subject to material compatibility |
| Operating Mode | Worm gear; optional lever, pneumatic actuator or electric actuator subject to model availability |
| Valve Type | Wafer type butterfly valve |
Design, Connection and Testing Standards
Applicable standards depend on the valve design, pressure class, end connection and project specification. The following standards were listed for this product range; please confirm the exact standard combination on the quotation and technical datasheet.
| Design and Manufacture | Flange Connection | Face-to-Face Dimension | Test and Inspection |
|---|---|---|---|
| MSS SP-67 API 609 EN 593 |
DIN PN10/16/25 ANSI B16.1 Class 150 BS 4504 ISO PN10/16 JIS B2212/B2213 BS 10 Table D / Table E |
API 609 ISO 5752 Series 20 BS 5155 |
API 598 |
Butterfly Valve Materials of Construction
Material combinations can vary by model and operating conditions. The options below are the material options supplied for this product range, not a statement that every valve uses all listed materials.
| Component | Available Materials |
|---|---|
| Body | Ductile Iron (ASTM A395 Gr. 60-40-18) / CF8 / CF8M / WCB |
| Disc | Ductile Iron (ASTM A395 Gr. 60-40-18) / CF8 / CF8M / Alloy 20 / Bronze |
| Stem | SS420 / SS410 / C95800 / C95400 / F6A |
| Seat | PTFE / PFA |
Operation Options and Customized Butterfly Valve Solutions
The featured valve uses a worm gear operator for manual operation. Depending on the valve size and design, alternative operating arrangements may include a lever handle, pneumatic actuator or electric actuator. Actuator selection should consider required operating torque, supply conditions, opening and closing time, control signal and fail-safe requirements.
Customization may include body, disc, stem and seat material selection; surface coating; flange compatibility; stem or neck configuration; and actuator mounting. For corrosive service, provide the process medium, concentration, temperature and pressure so the wetted materials can be reviewed before manufacture.
Information to Provide for Valve Selection
- Nominal size: for example, 6 inch / DN150.
- Pressure rating and flange standard: for example, Class 150, PN10 or PN16.
- Medium composition and concentration.
- Normal and maximum operating temperature and pressure.
- Required body, disc, stem and seat materials.
- Operation type: worm gear, pneumatic or electric.
- Required design, inspection and testing standards.
Request a Quote for PTFE Lined Wafer Butterfly Valves
Whether you are replacing an existing valve or specifying equipment for a new industrial project, Tianjin TWIV Fluid Valve can discuss suitable wafer butterfly valve configurations based on your pipeline and process requirements. Send us your technical data to check the appropriate size, pressure class, material combination and operating arrangement.
Frequently Asked Questions
What is a PTFE lined wafer butterfly valve used for?
It is used for pipeline isolation and suitable flow regulation in systems handling water, wastewater and selected corrosive media. Typical industries include chemical processing, industrial water treatment, desalination and marine services. Material compatibility must be checked for each application.
What is the difference between wafer type and lug type butterfly valves?
A wafer butterfly valve is generally clamped between two pipeline flanges. A lug type butterfly valve has threaded lugs around the body and may support certain dead-end or one-side-disconnection arrangements when specifically designed and rated for that service. Confirm the valve design and installation requirements before selection.
What is the operating temperature range of a PTFE lined butterfly valve?
The allowable temperature is determined by the complete valve design, including the seat construction, pressure rating, body and other wetted components. Do not use the maximum temperature of PTFE as the rated temperature of the complete valve. Please provide the operating conditions for confirmation.
Can this wafer butterfly valve be supplied with a pneumatic or electric actuator?
Alternative actuation may be available, including pneumatic and electric actuators, depending on the valve model and size. Actuator torque, control requirements and installation dimensions should be confirmed during technical selection.
What information is needed to receive a quotation?
Please provide the nominal diameter, pressure rating, flange standard, medium, operating temperature and pressure, required materials and operation type. Drawings or project specifications are also helpful for confirming the correct configuration.
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