Lug Type Butterfly Valve with Replaceable EPDM Seat | DI Body CF8M Disc | OEM Supplier

Introduction：

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

CBF02-TL03-Operation and Maintenance Manual DOWNLOAD

Key Features & Advantages:

1. Dead-End Service Capability with Threaded Lug Design

Engineered for maximum installation flexibility and system isolation.

• End-of-Line Service: The integrated threaded lugs allow the valve to be bolted directly to a single flange, enabling it to function as a dead-end isolation point without requiring a downstream flange connection .

• Simplified Maintenance: Unlike wafer valves that require complete system shutdown for removal, this lug design allows one side of the pipeline to be disassembled while the valve remains securely bolted on the opposite side, minimizing operational disruption .

• Secure Installation: The bolted connection provides superior mechanical stability, making it suitable for high-vibration applications and permanent installations.

2. Premium CF8M Stainless Steel Disc for Corrosion Resistance

The disc material is specifically selected for longevity in demanding media.

• Superior Corrosion Protection: The CF8M (AISI 316) stainless steel disc offers excellent resistance to pitting, chlorides, and general corrosion in water, seawater, and mild chemical environments, outperforming standard 304 grades .

• Extended Service Life: The robust disc material withstands erosion from suspended particles and maintains sealing integrity over countless cycles.

• Material Certification: Full material traceability and mill test certificates available upon request.

3. Replaceable Rubber Seat for Cost-Effective Maintenance

Designed with serviceability as a core principle.

• Easy Replacement: The EPDM rubber seat is designed for straightforward field replacement without special tools or factory service, allowing quick restoration of bubble-tight sealing performance .

• Bubble-Tight Shut-Off: The resilient seat conforms to the disc surface, providing reliable Class VI shut-off and preventing leakage in critical applications .

• Media Compatibility: EPDM offers excellent resistance to water, steam, weathering, and a wide range of chemicals within its temperature range (-20°C to +120°C) .

4. Robust Ductile Iron Body Construction

Built on a foundation of strength and reliability.

• High-Strength Material: The valve body is cast from GGG40/500-7 Ductile Iron, offering exceptional tensile strength, impact resistance, and durability compared to gray iron alternatives .

• Corrosion-Protective Coating: The body is protected with a durable epoxy coating, providing an additional barrier against atmospheric and buried corrosion .

• Integral Lug Flanges: The cast-in threaded lugs are precision-machined to ensure accurate bolt alignment and leak-free connections.

5. Comprehensive Size and Pressure Range

A complete solution for diverse pipeline requirements.

• Wide Size Range: Available from DN50 to DN1200 (2" to 48"), covering the most commonly specified diameters for industrial and municipal applications .

• Pressure Ratings: Standard PN10/PN16 and Class 125/150 configurations, with higher pressure options available upon request .

• Temperature Range: Suitable for operating temperatures from -20°C to +120°C (with EPDM seat), accommodating most water and general service applications .

Standard:

Why Choose Tianjin Worlds Valve as Your OEM Partner?  

1. Specialized Expertise in Lug Butterfly Valves

As a dedicated butterfly valve manufacturer, we possess deep understanding of lug-style valve design, including the critical threaded lug inserts and their performance in dead-end service applications . Our engineering team ensures precise machining and consistent quality across every production batch.

2. OEM/ODM Flexibility for Project-Specific Requirements

We offer extensive customization to meet your exact specifications:

Alternative disc materials (CF8, Aluminum Bronze, Duplex)

Special seat elastomers (NBR, Viton, Silicone)

Custom flange drilling (ANSI, DIN, JIS, BS)

Actuator mounting preparation (electric or pneumatic)

Special coatings and epoxy colors

Custom packaging, tagging, and export documentation

3. Certified Quality Assurance

Our manufacturing facility is ISO 9001 certified, and our products are designed to meet international standards:

CE Marked for European market compliance

UKCA Certified for UK construction products

WRAS Approved available for potable water applications

ACS available for French sanitary compliance

4. Comprehensive Testing and Documentation

Every valve undergoes rigorous testing in accordance with international standards:

Shell and seat leakage tests per EN 12266-1 / API 598

Material certification and mill test reports

Pressure test certificates

Traceability documentation

5. Global Export Expertise

With decades of experience exporting to over 50 countries, we provide:

Reliable logistics and shipping coordination

Professional export documentation

Multilingual technical support

Understanding of international project requirements

Typical Applications:

• Water Treatment: Pump isolation, filtration systems, chemical dosing lines, backwash circuits

• Municipal Water Supply: Distribution networks, pressure reducing stations, reservoir outlets

• HVAC Systems: Chilled water circuits, cooling towers, heating systems, pump isolation

• Industrial Processing: Process water, cooling circuits, general utility services

• Fire Protection: Sprinkler system isolation, pump suction and discharge

• Wastewater Treatment: Influent control, aeration lines, sludge handling

• Power Generation: Cooling water systems, auxiliary service water

• Marine Applications: Seawater cooling, ballast systems (with appropriate material upgrades)

Conclusion:

The Lug Type Butterfly Valve with Replaceable EPDM Seat from Tianjin Worlds Valve Co., Ltd. delivers the perfect combination of installation flexibility, maintenance economy, and reliable performance. When your project requires a high-quality, customizable lug butterfly valve backed by certified manufacturing and decades of export expertise—choose Tianjin Worlds Valve Co., Ltd.Contact us today for technical specifications, certification documentation, or a customized quotation for your specific application requirements.