Extended Stem Lug Butterfly Valve | Insulation-Friendly | ISO 5211

Introduce:

Tianjin Worlds Valve Co., Ltd. — your trusted China‑based OEM manufacturer — supplies extended stem lug butterfly valves with customizable stem lengths, materials, and actuation options to meet your project needs. Contact us for a competitive quote or to arrange a factory visit.

CBF03-TL01 - Detailed Product Info

Key Features & Advantages

1. Extended Stem for Insulation Clearance

• Positions the hand lever or actuator above insulation layers, protective barriers, or underground chambers, eliminating the need to remove insulation for valve access.

• Customizable stem length, typically extending 20%–50% longer than standard, enabling above-ground operation for valves buried at depth.

 

2. Lug Body with Bi-Directional Dead-End Service

• Threaded lug inserts allow direct bolting to a single flange, enabling end-of-line installation at full rated pressure.

• Rated for bi-directional dead-end service, making it ideal for isolation points and maintenance shut-offs where downstream piping may be removed.

 

3. Bubble-Tight Resilient Sealing

• EPDM seat (standard) delivers zero leakage (Class A) for water, HVAC, and mild chemical services (-20℃ to +120℃).

• Viton (FKM) or PTFE seat options for high-temperature or aggressive chemical applications (-35℃ to +200℃).

 

4. ISO 5211 Direct Actuator Mounting

• Standardized mounting interface enables direct attachment of electric, pneumatic, or gear operators without custom brackets.

• The ISO 5211 flange allows quick field swapping between manual, electric, or pneumatic actuation without removing the valve from the pipeline.

 

5. Ductile Iron Body with Epoxy Coating

• High-strength GGG40 ductile iron delivers tensile strength >400 MPa for pressure surges and pipeline stress.

• Epoxy coating (any RAL color) provides external corrosion protection for underground, marine, and outdoor installations.

 

6. Wide Range of Disc Materials (OEM Flexible)

• Ductile iron with nylon/PTFE coating (cost-effective for water service)

• CF8 / CF8M stainless steel (chemical, high-purity, mild corrosive media)

• Aluminum Bronze C95400 (seawater, marine, desalination)

Technical Specifications:

 

 

Why Choose Tianjin Worlds Valve?

• Direct OEM/ODM Manufacturer–We produce in our own ISO 9001 certified factory, not only a trading company. Every butterfly valve is manufactured to your exact specifications.

• Material & Design Flexibility–all can be tailored to your specific media, temperature, and pressure requirements.

• Certified Quality–ISO 9001 certified with CE, UKCA, WRAS, and ACS certifications available upon request to meet global market requirements.

• Full Documentation–Material certificates (mill test reports) and pressure test reports provided with every order.

• Global Export Experience–Supplying valves to over 50 countries with reliable logistics and technical support.

Conclusion:

The extended stem lug butterfly valve delivers reliable, accessible flow control for insulated and buried pipelines. Fully customizable — stem length, materials, actuation. ISO 9001 certified OEM. Contact Tianjin Worlds Valve for a quote or factory visit.