4 Inch Double Flanged Butterfly Valve – CF8 Disc, Vulcanized Seat, ISO 5211

Introduce:

Double Butterfly Valve | Ductile Iron Body | CF8 Disc | Vulcanized Rubber Seat | ISO 5211

Tianjin Worlds Valve Co., Ltd.–Your Reliable Source for Durable, Cost-Effective Flow Control

CBF02-TF01 - Detailed Product Info

Technical Specifications

This model is configured with the following parameters. Please note that every item listed below is customizable to your specific needs.

 

Key Features & Advantages

1. Pinless Disc Design–Superior Hygiene & Corrosion Resistance

• No Crevices for Debris–Unlike traditional disc designs that use pins to secure the disc to the stem, the pinless design eliminates exposed crevices and cavities where debris, bacteria, or corrosive media can accumulate.

• Prevents Corrosion Trapping–Pin holes and crevices are common sites for pitting and crevice corrosion. The pinless design removes these vulnerable spots, significantly extending disc and stem life in aggressive environments.

• Easy Maintenance–With no pins to corrode or loosen, maintenance is simplified and the risk of in-service failure is reduced.

 

2. Double Flanged Connection–Maximum Rigidity

• Integral Flanges on Both Ends–The valve bolts directly to mating pipe flanges on both sides, providing the most secure and rigid connection available.

• Bidirectional Dead-End Service–Supports isolation and removal of pipe sections on either side while the valve remains closed and sealed.

• Easier Alignment–Integral flanges simplify mounting and centering between pipeline flanges–no complicated alignment procedures.

 

3. Body Material–Ductile Iron (GGG40)

• High Strength–Ductile iron offers approximately twice the tensile strength of gray iron, providing reliable performance under pressure surges.

• Impact Resistance–The nodular graphite structure provides exceptional toughness, withstanding mechanical shock and vibration.

• Corrosion Protection–Combined with standard epoxy coating (250μm minimum), the body resists corrosion in water and wastewater service.

 

4. Disc Material–CF8 Stainless Steel (AISI 304)

• Good Corrosion Resistance–CF8 provides reliable resistance to oxidation and corrosion in water, mild chemicals, and atmospheric exposure.

• Non-Toxic and Safe–Suitable for potable water and general service applications.

• Durable and Lightweight–Offers good mechanical strength while keeping the disc weight manageable for smooth operation.

 

5. Seat Material – Vulcanized EPDM Rubber

• Zero Leakage Path–Chemically bonded to the body with no gaps or crevices between the seat and valve body, eliminating potential leak paths.

• Full Isolation of Metal–The vulcanized liner fully encapsulates all wetted metal surfaces, completely isolating the ductile iron body from the process fluid.

• Eliminates Flange Gaskets–The vulcanized seat extends to the outer edge of the valve body, serving as an integrated flange seal–one less component to fail.

 

6. ISO 5211 Top Flange–Ready for Automation

• Standardized Interface–The ISO 5211 mounting pad allows easy installation of electric, pneumatic, or hydraulic actuators in the future – no custom brackets or modifications required.

• Hand Lever Operation–Includes a locking plate for position locking, providing simple, reliable manual control for 4-inch valves.

• Easy Upgrade Path–When your system needs automation, simply remove the hand lever and bolt on an actuator–the valve is already prepared.

Typical Applications

Thanks to its robust construction and fully customizable material options, this double flanged butterfly valve is widely utilized across diverse industries:

• Water Supply & Distribution–Municipal water mains, pumping stations, distribution networks.

• Wastewater Treatment–Sewage lines, treatment plants, effluent systems.

• HVAC Systems–Chilled water, hot water, cooling tower systems.

• Chemical Processing–Corrosive fluids, acids, alkalis (with CF8 disc and vulcanized seat).

• Food & Beverage–Sanitary applications where crevice-free design is critical.

• Industrial Processes–General industrial water lines, cooling water, process fluids.

Why Choose Tianjin Worlds Valve?

1. LRQA-Certified Quality–Our ISO 9001:2015 certification is issued by LRQA, a globally trusted certification body–demonstrating our commitment to continuous improvement and risk management.

2. Pinless Disc Design Expertise–We specialize in pinless disc designs that eliminate crevices and corrosion traps–delivering superior hygiene and longevity for demanding applications.

3. Replaceable Seat Expertise– Our field-serviceable seat design means you can swap EPDM seats without removing the valve from the line–reducing downtime and maintenance costs.

4. Vulcanized Seat Specialists–Our body-bonded vulcanized seat design provides zero-leakage sealing and eliminates the need for separate flange gaskets–reducing installation time and potential failure points.

5. Full Customization–Materials, flange standards (ANSI, DIN, JIS, BS), coatings (any RAL color), actuators–we build to your spec.

6. 19+ Years Export Experience–Smooth logistics and after-sales support to 50+ countries – including Europe, Americas, Middle East, and Southeast Asia.

7. 100% Traceability–Every valve comes with material certificates and pressure test reports–no exceptions.

8. Quick Turnaround–Dedicated project manager; typi cal lead time 15–40 days. Factory visits welcome in Tianjin.

Get in Touch–Customize Your Double Flanged Valve Today:

Whether you need this 4-inch configuration, a different size, automated actuation, or a complete valve package for a large-scale project – we're ready to build to your specification.

Simply send us:

• Required size and pressure rating

• Media type and operating temperature

• Preferred material combination (body / disc / seat)

• Actuator type (manual, gear, electric, pneumatic, hydraulic)

• Flange standard and drilling (ANSI, DIN, JIS, BS)

• Target quantity and destination port

 

Our team will respond within 24 hours with a quotation and engineering proposal.

We also welcome factory visits–come see how we manufacture your valves in Tianjin, China.

Contact Us Now and Let's Build Your Valve Together.