Wafer Butterfly Valve with CF8 Disc & NBR Seat | Flexible Material Customization

Product Overview:

Tianjin Worlds Valve Co., Ltd. offers a standard yet highly adaptable wafer butterfly valve designed for reliable on/off control and basic throttling in general industrial applications. This model features a CF8 stainless steel disc and an NBR seat, with the flexibility to fully customize all major components including disc material, seat material, size, pressure rating, flange standard, and actuation to meet specific user requirements. Available in sizes from DN50 to DN3000, this valve serves a wide range of pipeline systems spanning water supply, HVAC, oil and gas, and other general industrial services.

Introduction:

Product Type: Wafer Butterfly Valve  

Body Material: Ductile Iron  

Disc Material: Stainless Steel (304SS)

Seat Material: EPDM, NBR, VITON, PTFE... 

Connection Type: Wafer type connection

Size Range: DN50–DN3000  

Pressure Rating:  

PN10 / PN16 / PN25 / Class150 ... 

Top Flange: Available in ISO 5211 standard for direct actuator mounting  

Operating Temperature Range: -30°C to 110°C (eg: NBR) 

Customization: All materials, dimensions, and pressure ratings can be modified according to customer requirements

Type: CBF02-TA01--Product Catalog

Key Features & Advantages：

1. Robust Ductile Iron Valve Body – Strength and Durability  

The valve body is manufactured from high-strength ductile iron (GGG40 / ASTM A395) with a durable epoxy coating, providing a solid foundation for long-term service.

• High Tensile Strength & Impact Resistance: GGG40 delivers a minimum tensile strength of 400 MPa (65 ksi) and excellent elongation, allowing the valve to withstand pressure surges, water hammer, and pipeline stress without cracking.

• Superior Ductility & Fatigue Life: The nodular graphite structure offers better elongation and fatigue resistance than gray cast iron, making it suitable for applications with frequent pressure cycling or vibration.

• Epoxy Coating for Corrosion Protection: An epoxy coating (minimum 250 µm, any RAL color available) protects external surfaces from atmospheric corrosion, moisture, and soil chemicals, extending valve life in buried or exposed installations.

 

2. CF8 Stainless Steel Disc – Reliable Corrosion Resistance  

The disc is cast from CF8 (ASTM A351 Grade CF8), the cast equivalent of wrought 304 stainless steel, offering good corrosion resistance in a wide range of industrial fluids.

• Proven Material Performance: CF8 provides good resistance to oxidation, water, mild chemicals, and food processing environments, making it a cost-effective choice for general service.

• Good Mechanical Strength: With a tensile strength of 485 MPa (70 ksi) and excellent ductility, the disc maintains its integrity under normal operating conditions.

• Upgrade Options for Aggressive Media: For seawater, brine, or high‑chloride environments, CF8M (316), duplex, super duplex, or aluminum bronze discs are available upon request.

 

3. NBR Seat – Optimized for Oil and Fuel Service  

The standard NBR (nitrile butadiene rubber) seat is specifically formulated for applications involving petroleum-based fluids, oils, and aliphatic hydrocarbons.

• Excellent Oil & Fuel Compatibility: NBR resists swelling and degradation when exposed to mineral oils, diesel, gasoline, hydraulic fluids, and greases.

• Good Mechanical Properties: It offers high abrasion resistance, good tensile strength, and maintains sealing integrity within a temperature range of -30°C to +110°C.

• Economical Choice for Hydrocarbon Media: For oil and gas, fuel handling, or petrochemical lines, NBR provides reliable sealing at a competitive cost.

 

4. Fully Customizable Disc and Seat Materials – Tailored to Your Media  

We do not limit you to one configuration. All wetted parts can be selected based on your specific media, temperature, and pressure requirements.

• Disc Material Options: Choose from ductile iron (with nylon, epoxy, or PTFE coating), CF8, CF8M, duplex 2205, super duplex 2507, aluminum bronze, or other alloys.

• Seat Material Options: Select from EPDM (water/steam), NBR (oil/fuel), Viton (aggressive chemicals), PTFE (high‑purity/wide temperature), or other elastomers as needed.

• No Unnecessary Defaults: You specify the exact materials, and we manufacture accordingly – no assumptions, no guesswork.

 

5. Compact Wafer Design-Fast, Space-Saving Installation  

The wafer‑style body is engineered for simple, direct mounting between standard pipeline flanges, reducing both installation time and overall system cost.

• Lightweight and Compact: The wafer design eliminates the need for companion flanges, saving weight and requiring less space compared to flanged‑end valves.

• Quick Bolt‑Up Installation: Centered between two flanges and secured with through‑bolts, the valve can be installed or removed without disturbing adjacent piping.

• Standardized Face-to-Face Dimensions: Conforms to ISO 5752 / EN 558 Series 20, ensuring compatibility with most industrial piping systems and easy replacement.

Why Choose Tianjin Worlds Valve?

1. Authentic OEM Manufacturing: We manufacture valves strictly according to customer specifications, with no assumed defaults. You specify the disc material, seat material, body material, pressure rating, flange standard, coating color, and actuation method — we produce accordingly.

2. Industry Standards Compliance: All valves are manufactured to meet internetional standards, with face-to-face dimensions per ISO 5752 / EN 558 Series 20. Wafer ends are compatible with EN 1092 PN10/PN16 and ASME B16.5 Class 150 flanges.

3. Material & Certification Expertise: Full material certificates (mill test reports) and pressure test reports accompany every order. ISO 9001 certified facility with CE, UKCA, WRAS, and ACS certifications available.

4. Global Supply Experience: Products have been supplied to clients in over 50 countries, with professional packaging, export documentation, and reliable logistics.

 

Conclusion

This wafer butterfly valve combines proven performance with full customization flexibility. Whether you need a standard CF8 disc with NBR seat or a specialized configuration for aggressive media, Tianjin Worlds Valve Co., Ltd. delivers exactly to your specifications. Contact us today for a quotation or to schedule a factory visit — we look forward to supporting your project.