Gear Operated U Type Flange Butterfly Valve with Nylon Coated Disc

Introduction：

Gear Operated U Type Flange Butterfly Valve with Nylon Coated Disc

Tianjin Worlds Valve Co., Ltd. – Engineered for Efficient Flow and Durable Performance

CBF02-TU03-Operation and Maintenance Manual DOWNLOAD

Technical Features & Performance Advantages:

1. Hydrodynamic U-Type Disc for Maximum Flow Efficiency

• Reduced Energy Consumption: The patented U-shape (or double-offset) disc profile is engineered to streamline fluid flow, reducing turbulence and pressure drop by up to 25% compared to conventional disc designs. This translates directly into lower pumping energy costs over the valve's lifetime.

• Cavitation & Water Hammer Mitigation: The optimized disc geometry promotes smoother flow, minimizing the risk of cavitation damage and pressure surges in the piping system.

2. Protective Nylon 11 Disc Coating for Enhanced Durability

• Corrosion & Abrasion Defense: The ductile iron disc is coated with a resilient, thermally bonded layer of Nylon 11 (Polyamide 11). This creates a tough, chemically inert barrier that protects against rust, scaling, and wear from particulates in water and mild chemical services.

• Non-Stick Surface & Easy Cleaning: The smooth Nylon surface resists scaling and biological fouling, prevents particle adhesion, and simplifies maintenance cleaning procedures.

3. Precision Worm Gear Operation for Effortless Control

• High Mechanical Advantage: The heavy-duty worm gear operator provides significant torque multiplication, allowing for easy opening and closing of the valve even against higher differential pressures with minimal handwheel effort.

• Accurate Positioning & Stability: The self-locking gear mechanism enables precise flow modulation and securely holds the disc in any set position (from 0 to 90 degrees) without creeping.

4. Robust Flanged Body for a Secure, Leak-Free Connection

• Reliable Pipeline Integration: The flanged ends (compliant with ANSI B16.5 or EN 1092-1 standards) ensure a strong, bolt-to-bolt connection that is ideal for mainline services, handling system stress effectively, and facilitating easier gasket alignment for a bubble-tight seal.

• High-Pressure Integrity: The flanged design provides superior structural strength suitable for PN16/PN25 pressure classes.

Standard:

Parameter	Specification
Model	CBF02-TU03
Sizes	DN50-DN1400
Pressure Class	PN10/16
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	DI
Seat	EPDM
Stem	SS420

Competitive Advantages：  

• Energy-Saving Design: U-type disc directly reduces system operating costs by minimizing pump head loss.

• Long-Term Corrosion Protection: Nylon 11 coating extends disc and valve life in corrosive or scaling water conditions at a fraction of the cost of stainless steel.

• Superior Manual Control: The gear operator ensures easy, precise, and stable valve positioning for all operators.

• Robust & Leak-Resistant Connection: The flanged body offers the most reliable and serviceable connection for critical applications.

• Certified Quality & Custom Support: Backed by international certifications and available for OEM customization including specific gear ratios, coating colors, and flange standards.

Target Applications:

This valve is engineered for systems where flow efficiency, durability, and reliable manual control are critical:

• Water & Wastewater Treatment Plants: Pump discharge, filtration inlet/outlet, and main distribution lines.

• HVAC Systems: Primary & secondary chilled/heating water circuits, energy transfer stations, and cooling towers.

• Industrial Cooling & Process Water: Large-scale cooling water networks, heat exchanger supply.

• Irrigation & Water Supply: Pump station discharge and main transmission pipelines.

• General Industrial Services: Where energy savings and low maintenance are prioritized.

Conclusion:

This butterfly valve features a hydrodynamic U-shaped disc made of ductile iron with a protective Nylon 11 coating. This combination delivers the strength and cost-effectiveness of ductile iron along with enhanced corrosion and abrasion resistance, offering a reliable and economical flow control solution for water treatment, HVAC, and general industrial systems.