The Short Neck Lug Type Model 20 Butterfly Valve is a high-performance flow control solution engineered for precision and durability in demanding industrial environments. Featuring a compact short-neck design, this valve is specifically optimized for installations with limited spatial clearance without compromising on sealing integrity or operational torque.
Constructed from premium industrial-grade materials including ASTM standard cast iron and stainless steel, the Model 20 ensures exceptional resistance to corrosion and wear. Its versatile seat and O-ring options allow it to be seamlessly integrated into diverse piping systems, handling a wide range of media from standard water to aggressive chemical fluids.
Detailed Parameters
| Body Material | Cast Iron (ASTM A126 CL.B) / Ductile Iron (ASTM A536 65-45-12) | Disc Material | Ductile Iron (Nickel/Nylon coated) / Stainless Steel / Al-Bronze |
|---|---|---|---|
| Upper Stem | Zinc Plated Steel / Stainless Steel (ASTM A276 Type 316, 410, 420) | Lower Stem | Zinc Plated Steel / Stainless Steel (ASTM A276 Type 316, 410, 420) |
| Seat Options | NBR, EPDM, Neoprene, PTFE, Viton | O-Ring Materials | NBR, EPDM, Neoprene, Viton |
| Bushing Material | PTFE, Nylon, Lubricated Bronze | Spring Pin | Carbon Steel / Stainless Steel |
| Size Range | 2" to 12" (50mm to 300mm) | Connection Type | Lug Type / Short Neck Design |
Key Advantages
Superior Corrosion Resistance
Utilizing ASTM A351 CF8/CF8M stainless steel and nickel plating to prevent oxidation in harsh environments.
Extended Service Life
High-grade Ductile Iron and specialized bushings reduce friction and wear during frequent cycling.
Versatile Sealing
Multiple seat materials (PTFE, Viton, EPDM) ensure a bubble-tight seal for various chemical compatibilities.
Compact Installation
The short neck design allows for installation in tight spaces where standard butterfly valves cannot fit.
Precision Engineering
Strict adherence to dimensional tolerances ensures easy replacement and perfect alignment in piping.
Standard Compliance
Manufactured according to ASTM and international standards for safety and reliability.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of all valve sizes from 2" to 12" to ensure rapid delivery.
Quality Assurance
Rigorous pressure testing for every unit to guarantee zero leakage upon installation.
Order Tracking
Transparent shipment updates from the factory to your site for precise planning.
Material Certification
Full traceability of ASTM material certificates for every component used.
Custom Configuration
Flexible selection of seat and stem materials tailored to your specific fluid medium.
Lifecycle Support
Professional technical guidance for maintenance and seal replacement.
Investment Return Comparison
| Feature | Model 20 Lug Type | Standard Butterfly Valve | Budget Valves |
|---|---|---|---|
| Installation Space | Ultra-Compact (Short Neck) | Standard Space | Standard Space |
| Durability | High (ASTM A536) | Medium | Low |
| Seal Integrity | Bubble-Tight (Multi-Option) | Standard | Frequent Leaks |
| Maintenance Cost | Low (Wear-resistant Bushing) | Medium | High (Frequent Replacement) |
| Overall ROI | Maximum (Long Life/Low OpEx) | Moderate | Low (High Downtime) |
Frequently Asked Questions
The short neck design significantly reduces the overall height of the valve, making it ideal for installations in tight spaces or where overhead clearance is limited, without affecting the flow capacity.
For high-temperature or chemically aggressive media, we recommend Viton or PTFE seats, as they offer superior thermal stability and chemical inertness compared to NBR or EPDM.
Yes, as a butterfly valve, the Model 20 is designed to handle flow in both directions, providing versatility in piping layout and system reconfiguration.
The Model 20 is available in a wide range of sizes from 2 inches (50mm) up to 12 inches (300mm), catering to various pipeline diameters.
Lug type valves have threaded inserts that allow them to be bolted directly to the pipe flange, meaning the valve can remain in the line even if the downstream piping is removed.
Yes, we offer stems in Zinc Plated Steel or various grades of Stainless Steel (Type 316, 410, 420) to match the corrosion requirements of your specific application.
