25kN Tandem Sheave Stringing Block for Double Conductor Tensioning

Optimize double conductor stringing with Ningbo Changshi's 25kN tandem sheave stringing block. Engineered for efficient, safe, and high-load capacity overhead transmission line projects.

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25kN Tandem Sheave Stringing Block for Efficient Double Conductor Tensioning on OHTL

At Ningbo Changshi Electric Power Machinery Manufacturing Limited, we are committed to providing advanced and robust solutions for the evolving demands of overhead transmission line (OHTL) construction. Our 25kN Tandem Sheave Stringing Block is a specialized, heavy-duty tool meticulously engineered for the efficient and safe tension stringing of double conductor configurations. As a prominent China manufacturer and exporter, we offer a comprehensive one-stop supply for all your electrical construction and maintenance needs, and this tandem block exemplifies our commitment to high-performance, precision engineering, and unwavering reliability for complex OHTL projects.

Tandem Stringing Blocks are indispensable when dealing with double conductor bundles, which are common in higher voltage transmission lines to improve current carrying capacity and reduce corona loss. This block's dual-sheave design allows two conductors to be strung simultaneously, maintaining proper spacing and tension while minimizing friction and preventing damage to the conductors. The 25kN (approximately 5,620 lbs) rated capacity ensures it can handle significant loads, making it ideal for demanding stringing operations.

Product Features & Benefits:

  • Optimized for Double Conductors: Features two precisely aligned sheaves, specifically designed to accommodate and guide two conductors simultaneously, maintaining their separation and preventing entanglement or abrasion.

  • High Load Capacity (25kN): Robustly constructed to safely manage tension loads up to 25 kilonewtons, making it suitable for medium to large-scale transmission line projects and heavy conductors.

  • Smooth & Synchronized Operation: Equipped with high-quality, sealed precision bearings on both sheaves, ensuring exceptionally smooth, low-friction, and synchronized rotation, which is vital for controlled tension stringing of double conductors.

  • Superior Conductor Protection: Each sheave features a carefully machined groove, often lined with durable, non-abrasive materials like UMC (polyurethane) or resilient rubber, providing a gentle contact surface to prevent kinking, scratching, or other damage to valuable conductors.

  • Durable & Robust Construction: Manufactured from high-strength steel or aluminum alloys, with a sturdy frame designed to withstand the rigors of continuous field use and harsh environmental conditions, guaranteeing extended service life.

  • Versatile Attachment Options: Designed with flexible and secure attachment mechanisms such as Swivel hooks or universal hangers, allowing for stable mounting on tower cross-arms or poles, adapting to various stringing setups.

  • Corrosion Resistance: All steel components are typically hot-dip galvanized or treated with a durable corrosion-resistant coating, ensuring long-term resilience against rust and environmental degradation.

Product Applications:

Our 25kN Tandem Sheave Stringing Block is indispensable for a wide range of overhead transmission line projects, particularly those involving double conductor bundles:

  • New Transmission Line Construction: Essential for the initial tension stringing of double conductor bundles on new power line routes.

  • High-Voltage Line Upgrades: Ideal for re-conductoring or upgrading existing lines to accommodate increased capacity with double conductors.

  • Medium to High Voltage (HV) Projects: Perfectly suited for projects requiring efficient and safe handling of two conductors simultaneously.

  • Complex Terrain Stringing: Its robust design and smooth operation make it reliable for use in diverse and demanding geographical conditions where precision is critical.

  • Bundle Conductor Repair/Maintenance: Facilitates temporary support or re-stringing of sections of double conductor bundles.

Technical Data Sheet:

Feature Specification
Rated Load Capacity 25kN (approx. 5,620 lbs)
Sheave Type Tandem (Double Sheave)
Sheave Diameter (Outer) Varies (e.g., 508mm, 660mm, 822mm – specific models available)
Groove Material High-strength Aluminum Alloy / Steel with UMC lining
Frame Material Hot-Dip Galvanized Steel / High-Strength Aluminum
Max. Conductor Diameter (Per Groove) Specific to groove design (e.g., 30mm, 40mm)
Bearing Type Sealed Precision Ball Bearings / Roller Bearings
Attachment Type Swivel Hook / Universal Hanger

Note: Specific technical specifications, including exact sheave diameter and maximum conductor diameter, may vary depending on the model and intended application. Please contact us for detailed datasheets and to discuss custom requirements.

Why Choose Ningbo Changshi Electric Power Machinery Manufacturing Limited?

Choosing Ningbo Changshi means partnering with a trusted industry leader dedicated to quality, innovation, and comprehensive solutions. Here’s why we are your ideal choice:

  1. Specialized Tandem Stringing Expertise: We possess deep knowledge in designing and manufacturing tools for complex multi-conductor stringing, ensuring optimal performance and conductor protection.

  2. Comprehensive One-Stop Solutions: As a prominent manufacturer and exporter, we offer a vast array of equipment for both overhead and underground power line projects, providing a truly integrated supply chain that simplifies your procurement.

  3. Unwavering Quality & Durability: Every 25kN Tandem Sheave Stringing Block undergoes rigorous quality control and testing, ensuring it is robust, reliable, and performs flawlessly in the field, even under heavy loads.

  4. Global Export & Support: Our efficient worldwide export capabilities and dedicated customer service team ensure prompt delivery and expert technical assistance, wherever your challenging project is located.

  5. Performance-Driven Innovation: We focus on practical, high-performance designs that offer exceptional value, enhancing efficiency, safety, and productivity on your complex power line construction sites.


Final Summary:

Our 25kN Tandem Sheave Stringing Block is an indispensable, high-capacity tool essential for the efficient, safe, and damage-free tension stringing of double conductors on overhead transmission lines. With its precision engineering and robust construction, it exemplifies Ningbo Changshi Electric Power Machinery Manufacturing Limited's commitment to delivering high-quality, reliable equipment that meets the demanding requirements of modern power infrastructure projects.

Optimize your double conductor stringing projects with confidence! Explore our 25kN Tandem Sheave Stringing Blocks. Visit www.ohtlstringingequipment.com or contact Ningbo Changshi Electric Power Machinery Manufacturing Limited today to discuss your specific high-capacity stringing needs and request a comprehensive quotation!

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