Flanged Butterfly Valve with Pin-Mounted CF8M Disc & Gear Operator | Tianjin Worlds Valve

Introduction：

Operated by a manual **worm gear operator (turbine)**, it provides easy and precise control, especially for larger pipe diameters. The core sealing components feature a **CF8M (AISI 316 Stainless Steel) disc** for corrosion resistance and a resilient **EPDM seat** for a dependable, bubble-tight seal. With a comprehensive **size range from DN50 to DN2000**, this valve is built to meet the demands of large-scale infrastructure and industrial projects.

Flanged Butterfly Valve with Pin-Mounted CF8M Disc & Gear Operator

Tianjin Worlds Valve Co., Ltd. – ISO 9001, CE, UKCA & WRAS Certified Manufacturer

CBF01-TF01-Operation and Maintenance Manual DOWNLOAD

Key Features & Advantages:

1. High-Strength Pin-Mounted Disc & Stem Assembly for Ultimate Reliability

Our valve incorporates a robust mechanical design that ensures durability and prevents internal failure.

• Secure Disc Connection: The **CF8M disc is securely fastened to the stem using high-strength pin connections**. This design prevents disc loosening or slippage under high torque or pressure fluctuations, a common failure point in standard keyed or clamped designs.

• Enhanced Structural Integrity: The pin-mounted system distributes operational stresses more evenly between the disc and stem, significantly increasing the valve's resistance to mechanical shock and water hammer, leading to a longer service life.

• Maintenance-Free Operation: This permanent, positive-lock assembly eliminates the need for internal adjustments and reduces the risk of component separation, ensuring reliable, maintenance-free operation over time.

2. Efficient Gear Operation for Effortless Large-Diameter Control

Designed for easy manual handling across its extensive size range

• High Mechanical Advantage: The **multi-ratio worm gear operator** provides substantial torque multiplication, making the manual opening and closing of large-diameter valves (from DN400 upwards) smooth and manageable with minimal operator effort.

• Precise Positioning & Indication: The gearbox allows for fine, incremental disc positioning for potential flow modulation and features a clear, visual position indicator (open/close) for at-a-glance status confirmation.

• Reliable Seating: The gear mechanism ensures a tight mechanical seal by applying consistent and adequate seating torque, guaranteeing leak-tight shut-off against the EPDM seat.

3. Durable Material Combination for Water & General Service

Built with proven materials for long-lasting performance in common applications.

• Corrosion-Resistant Disc: The **CF8M (AISI 316 Stainless Steel) disc** offers excellent resistance to corrosion and pitting from chlorides and oxidizing agents present in treated water, cooling water, and mild industrial fluids.

• Resilient EPDM Seal: The **Ethylene Propylene Diene Monomer (EPDM) seat** provides outstanding elasticity, excellent resistance to water, weathering, and a wide operating temperature range, ensuring a long-lasting, reliable seal.

• Robust Flanged Body: The **Ductile Iron (GGG40) body** with **integral flanges (EN1092-2 or ANSI B16.1)** offers high strength and impact resistance, forming a permanent, rigid, and leak-resistant connection to the pipeline.

4. Extensive Size Range (DN50-DN2000) for Major Infrastructure Projects

A scalable solution engineered for large-scale systems.

• Unmatched Size Availability: We offer one of the broadest standard ranges in the industry, from **DN50 (2") up to DN2000 (80")**, capable of serving everything from branch lines to main transmission pipes.

• Engineered for Large Diameters: Valves in the larger sizes (DN1200+) are specifically designed with reinforced structures and optimized gear ratios to handle the inherent challenges of large-diameter flow control reliably.

• Versatile Application Scope: This makes the valve ideal for major **water distribution networks, wastewater treatment plants, power plant cooling systems, and large industrial process water circuits**.

Standard:

Parameter	Specification
Model	Flanged Butterfly Valve(CBF01-TF01)
Sizes	DN50-DN2000
Design	Pin-mounted CF8M Disc
Pressure Rating	PN10/16/150LB/JIS10K
Design	EN593  BS5155  EN1092  ISO5211
Testing	ISO5208  EN12266-1
TOP Flange	ISO5211 (according to customer’s needs)
Face to Face	EN558-1 DIN3202 ISO5752 BS5155
Body	Ductile Iron
Disc	CF8M (AISI 316 Stainless Steel)
Seat	EPDM
Stem	SS431/416/421...

Why Choose Tianjin Worlds Valve?  

• Expert in Large-Diameter Valve Manufacturing: We possess specialized engineering and manufacturing capabilities for valves exceeding DN1200, ensuring they meet the rigorous demands of high-flow applications.

• Focus on Robust Design: Our pin-mounted disc construction exemplifies our commitment to **superior mechanical design and long-term reliability**, reducing lifecycle costs for our clients.

• Certified OEM/ODM Partner: As an **ISO 9001 certified** factory, we offer reliable OEM/ODM services. We can customize valves to specific standards (WRAS, UL/FM, etc.), materials, and actuation requirements (electric, pneumatic).

• Global Project Experience: Our valves, especially in large diameters, have been successfully supplied to international infrastructure projects, supported by experienced technical and commercial teams.

Typical Applications:

• Municipal Potable Water Transmission & Distribution Mains

• Large-Scale Wastewater and Sewage Treatment Plants

• Power Plant Cooling Water Intake and Discharge Lines

• Industrial Cooling Water Circuits (Steel, Chemical, Petrochemical)

• Irrigation and Flood Control Systems

Conclusion:

For technical specifications, project-specific engineering data, or a quotation for your large-diameter application, contact Tianjin Worlds Valve Co., Ltd.