Worm Gear Lug Butterfly Valve with Nylon Covered DI Disc

Worm Gear Lug Butterfly Valve with Nylon Covered DI Disc

Tianjin Worlds Valve Co., Ltd. – Your Reliable Source for Durable, Cost-Effective Flow Control

CBF02-TL03-Operation and Maintenance Manual DOWNLOAD

Key Technical Advantages & Design Benefits:

1. Precision Worm Gear Operation for Effortless Control

• Smooth & Easy Manual Actuation: The heavy-duty worm gear mechanism provides a high mechanical advantage, reducing the operating torque required by up to 60% compared to standard hand levers, allowing for smooth and controlled valve operation even under higher pressure.

• Stable Position Locking: The self-locking nature of the worm gear ensures the valve disc remains securely in any set position (open, closed, or partially open) without drifting, providing precise flow regulation.

• Durable & Protected Gearbox: The gear operator is housed in a sealed, corrosion-resistant enclosure, protecting internal components from harsh environmental conditions.

2. Nylon 11-Coated Ductile Iron Disc for Superior Protection

• Excellent Corrosion & Abrasion Resistance: The disc is coated with a thermally bonded layer of Nylon 11 (Polyamide 11), creating a tough, non-stick barrier. This protects the underlying ductile iron from rust, scaling, and damage from mildly corrosive fluids and abrasive particles.

• Reduced Maintenance & Extended Life: The inert Nylon coating prevents material buildup on the disc, minimizes wear against the seat, and significantly extends the service life of the valve in demanding water and industrial applications.

• Cost-Effective Alternative: Offers a more economical yet highly durable solution compared to full stainless steel construction for compatible services.

3. Lug-Type Body for Secure and Flexible Installation

• End-of-Line Service Capable: The threaded lug holes allow the valve to be bolted directly to a single pipeline flange, making it ideal for isolating sections of a system or for use at the end of a pipe run.

• Robust & Leak-Free Connection: Provides a strong, secure mount that withstands pipeline stress and vibration better than wafer-style valves in certain applications.

• Easy Mounting & Removal: Simplifies installation and maintenance procedures without requiring special nuts or additional hardware on one side.

4. Reliable EPDM Sealing & Bubble-Tight Performance

• Zero-Leakage Shutoff: Features a resilient EPDM seat that ensures excellent, bubble-tight sealing (tested to EN 12266-1 Class A standards) against water and a wide range of neutral media.

• Temperature Resilience: The EPDM seat maintains sealing integrity across a temperature range of -20°C to 120°C.

Standard:

Parameter	Specification
Model	CBF02-TL03
Sizes	DN50-DN1200
Pressure Class	PN6/10/16/150LB/JIS10K/AS “D”/ “E”
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
Standard	ASME B16.34
Body	Ductile Iron
Disc	DI
Seat	EPDM
Stem	SS431

Competitive Advantages & Value Proposition：  

Unbeatable Maintenance Savings: The replaceable seat design drastically cuts downtime and parts costs over the valve's lifetime.  

• Proven Durability: The combination of a ductile iron disc and epoxy-coated body ensures long-term, reliable service.  

• Instant Manual Simplicity: The hand lever provides fast, fail-safe operation without need for external power.  

• Direct OEM Value: We offer competitive pricing, reliable lead times, and flexibility for custom branding or minor modifications.  

• Compliant & Certified: Manufactured under an ISO 9001 quality system and compliant with key international directives (CE, UKCA).

Target Applications:

This valve is the workhorse solution for numerous industries requiring reliable and maintainable isolation:

• Water & Wastewater Treatment: Pump isolation, filtration systems, general water distribution.

• HVAC & Building Services: Chilled water, cooling towers, heating systems, and air handling units.

• General Industrial Plant: Cooling water lines, compressed air systems, process water, and utility services.

• Irrigation & Agriculture: Mainline and zone control for field and landscape irrigation.

• Fire Protection Systems: Sprinkler line isolation (where specification permits).

Conclusion:

Combining ductile iron reliability with stainless steel durability and rubber seat performance, this wafer butterfly valve delivers exceptional value for water treatment, HVAC, and industrial applications requiring cost-effective flow control solutions.