PRODUCT
DN32 CF8M disc wafer and lugged butterfly valve cast iron
Size: DN25-1000
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Pressure: PN10/PN16
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Standard: Flange: DIN3202, DIN2501 PN10/PN16
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Face to face: BS5155
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Top Flange: ISO5211
Wafer and Lug Type Butterfly Valve
The Wafer and Lug Type Butterfly Valve is designed for reliable flow control and shut-off applications in industrial pipeline systems. Featuring a compact structure, lightweight design and quick operation, this butterfly valve provides an economical solution for water treatment, wastewater management, chemical processing, marine systems and general industrial applications.
Available in cast iron, ductile iron, carbon steel, stainless steel and aluminum bronze materials, the valve can be configured with different disc and seat materials to meet various operating conditions. Manual, worm gear, pneumatic and electric operating options are available.
Product Overview
The wafer butterfly valve is installed between two pipeline flanges and secured using suitable bolts and nuts. Its compact face-to-face structure makes it suitable for installations where space and weight are important considerations.
The lug butterfly valve features threaded lugs around the valve body, allowing installation between flanges and supporting certain end-of-line maintenance configurations when properly specified.
Both wafer and lug type butterfly valves use a rotating disc to regulate or shut off the flow of media. The 90-degree operating mechanism allows quick opening and closing, making the valve suitable for a wide range of industrial pipelines.
Different sealing materials, body materials and actuator configurations can be selected according to pressure, temperature, media and installation requirements.
Key Features of Wafer and Lug Butterfly Valve
1. Compact and Lightweight Design
The wafer and lug butterfly valve features a compact body structure and relatively low weight, helping reduce installation space and pipeline support requirements.
2. Quick Opening and Closing
The quarter-turn operating mechanism allows the disc to rotate approximately 90 degrees between fully open and fully closed positions, providing convenient flow control.
3. Low Operating Torque
The optimized valve structure helps reduce operating torque, making manual operation easier and allowing flexible actuator selection.
4. Corrosion-Resistant Sealing Options
Various seat materials, including EPDM, PTFE, Buna-N, NBR and Hypalon, are available to accommodate different media and operating conditions, subject to material compatibility.
5. Easy Installation and Maintenance
The simple structure and convenient installation design help reduce maintenance complexity and support efficient operation in industrial pipeline systems.
6. Multiple Material Configurations
Body, disc, stem and seat materials can be selected according to the required pressure rating, working temperature and media characteristics.
Technical Specifications of Wafer and Lug Butterfly Valve
The following table provides the general technical specifications of the wafer and lug type butterfly valve.
| Parameter | Specification |
|---|---|
| Product Type | Wafer Type / Lug Type Butterfly Valve |
| Nominal Pressure | PN10 / PN16 (1.0 MPa / 1.6 MPa) |
| Nominal Diameter | DN25–DN1000 |
| Shell Test Pressure | 1.5 MPa (PN10) / 2.4 MPa (PN16) |
| Seal Test Pressure | 1.1 MPa (PN10) / 1.76 MPa (PN16) |
| Maximum Applicable Temperature | 150°C (subject to material configuration) |
| Applicable Media | Water, sewage, seawater, air, vapor, food-processing media, oils, acids, alkalis and other compatible fluids. |
| Operation Mode | Manual Lever, Worm Gear, Pneumatic Actuator, Electric Actuator |
| Valve Connection | Wafer Type / Lug Type |
Material Specifications
Different material combinations are available for the butterfly valve to meet the requirements of various industrial applications. The actual material configuration can be customized according to the working environment.
| No. | Part Name | Available Materials |
|---|---|---|
| 1 | Valve Body | Carbon Steel, Stainless Steel, Cast Iron, Ductile Iron, Aluminum Bronze |
| 2 | Disc | Aluminum Bronze, CF8M, Ductile Iron, WCB |
| 3 | Seat | EPDM, PTFE, Buna-N, NBR, Hypalon |
| 4 | Stem | Carbon Steel, SS304, SS420 |
| 5 | Bushing | PTFE, Lubricating Material |
| 6 | O-Ring | EPDM, PTFE, Buna-N, NBR, Hypalon |
Working Principle of Butterfly Valve
The wafer and lug butterfly valve operates through a circular disc installed inside the valve body. When the operating handle, worm gear or actuator is turned, the valve stem rotates the disc approximately 90 degrees.
When the disc is parallel to the direction of flow, the valve is in the open position, allowing fluid to pass through the pipeline. When the disc rotates perpendicular to the flow direction, it presses against the seat to shut off the medium.
By adjusting the disc position, the butterfly valve can also regulate flow in suitable operating conditions. Its simple quarter-turn design provides convenient operation and efficient flow control.
Applications of Wafer and Lug Type Butterfly Valve
Due to its compact design, flexible material selection and multiple operating options, the wafer and lug butterfly valve is widely used in industrial fluid handling systems.
Water Supply and Wastewater Treatment
Used in municipal water supply pipelines, sewage treatment plants, wastewater discharge systems and industrial water circulation networks for flow isolation and regulation.
Marine and Seawater Systems
Suitable material configurations can be used in seawater circulation, marine cooling systems, ship piping and desalination facilities.
Chemical and Petrochemical Industry
Used in compatible chemical transfer pipelines, industrial processing systems and fluid distribution networks. Material and seat selection should be based on the chemical properties of the medium.
HVAC and Building Services
Installed in chilled water pipelines, cooling water circulation systems, heating networks and ventilation-related fluid systems.
Power Plants and Industrial Utilities
Applied in cooling water systems, auxiliary water pipelines, industrial air systems and general utility piping.
Food and Pharmaceutical Processing
Can be configured for compatible process media and utility pipelines. For hygienic applications, appropriate materials, surface finishes and sanitary requirements should be confirmed.
Available Butterfly Valve Operating Options
Manual Lever Operated Butterfly Valve
Suitable for small and medium-sized pipelines where simple manual opening and closing are required.
Worm Gear Operated Butterfly Valve
Equipped with a worm gear operator to provide easier operation and mechanical advantage, especially for larger valve sizes.
Pneumatic Butterfly Valve
Operated by a pneumatic actuator, suitable for automated industrial processes and remote control systems.
Electric Butterfly Valve
Equipped with an electric actuator for remote operation, automated flow control and integration into industrial control systems.
How to Select the Right Wafer or Lug Butterfly Valve
Selecting the correct butterfly valve requires consideration of the pipeline design and operating conditions. Before placing an order, customers should confirm the following information:
- Valve type: Wafer type or lug type.
- Nominal diameter: DN25 to DN1000.
- Pressure rating: PN10 or PN16.
- Working temperature and operating pressure.
- Medium characteristics, including corrosion and abrasion requirements.
- Valve body, disc and seat materials.
- Connection standard and face-to-face dimensions.
- Operating method: Manual, worm gear, pneumatic or electric.
Frequently Asked Questions
1. What is the difference between wafer and lug butterfly valves?
A wafer butterfly valve is clamped between two pipeline flanges using suitable bolts and nuts. A lug butterfly valve has threaded lugs on the valve body, allowing bolting to the pipeline flanges and supporting certain independent end-of-line configurations when the valve is designed and rated for this service.
2. What pressure ratings are available?
The general pressure ratings provided for this butterfly valve are PN10 (1.0 MPa) and PN16 (1.6 MPa). The applicable rating should be confirmed according to the valve design and operating conditions.
3. What materials are available for the butterfly valve?
Available body materials include cast iron, ductile iron, carbon steel, stainless steel and aluminum bronze. Disc and seat materials can also be selected according to the application requirements.
4. Can the butterfly valve be operated automatically?
Yes. The butterfly valve can be equipped with pneumatic or electric actuators for remote operation and automated control. Manual lever and worm gear options are also available.
5. What media can a wafer butterfly valve handle?
Depending on the material configuration, it can be used for water, sewage, seawater, air, steam, oils and compatible chemical media. Actual suitability depends on pressure, temperature and material compatibility.
6. Can you customize butterfly valves according to project requirements?
Yes. Valve size, pressure rating, body material, disc material, seat material, connection type and operating method can be specified according to project requirements.
Contact TWIV for Wafer and Lug Butterfly Valve Solutions
Tianjin TWIV Fluid Valve provides industrial butterfly valve solutions for water treatment, marine, chemical, power generation and general industrial applications.
Whether you need a wafer butterfly valve, lug butterfly valve, cast iron butterfly valve or CF8M disc butterfly valve, our team can help you select a suitable configuration based on your application requirements.
Contact us today for product specifications, technical information and a quotation.
Company: Tianjin TWIV Fluid Valve
Website: www.twivfluidvalve.com
Email: lucy@twivfluidvalve.com
WhatsApp: +86 150 2213 4315
