The Long Neck Wafer Type Model 25 Butterfly Valve is a high-performance industrial flow control solution engineered for precision and durability. Featuring a space-saving wafer design and an extended neck for easier operation in confined or insulated piping systems, this valve ensures secure sealing and efficient flow regulation across various industrial applications.
Built with premium materials including ASTM A126 and A536 cast iron and high-grade stainless steel, the Model 25 is designed to withstand rigorous operating conditions. Its versatile material compatibility for seats and O-rings, ranging from EPDM to Viton, makes it an ideal choice for diverse media, ensuring long-term reliability and reduced maintenance costs.
Detailed Parameters
| Body Material | Cast Iron (ASTM A126 CL.B) / Ductile Iron (ASTM A536 65-45-12) | Disc Material | Ductile Iron (Nickel/Nylon coated) / SS (CF8, CF8M) / Al-Bronze |
|---|---|---|---|
| Stem Material | Zinc Plated Steel / Stainless Steel (ASTM A276 Type 316, 410, 420) | Seat Options | NBR, EPDM, Neoprene, PTFE, Viton |
| O-Ring Material | 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 | Wafer Type | Stem Design | Long Neck configuration |
Key Advantages
Superior Corrosion Resistance
Available in stainless steel and nickel-plated ductile iron to prevent oxidation and ensure longevity in harsh environments.
Low Maintenance Cycle
Precision-engineered bushings and high-grade stems reduce wear and tear, extending the time between service intervals.
Versatile Media Compatibility
Wide array of seat materials (Viton, PTFE, EPDM) allows for the handling of various chemicals, water, and oils.
Optimized Flow Design
The wafer profile minimizes pressure drop and maximizes flow efficiency within the piping network.
Easy Installation
Compact wafer design allows for quick installation and removal without the need for extensive piping modifications.
Standard Compliance
Manufactured according to ASTM standards, ensuring seamless integration with global industrial piping systems.
Product Gallery
Management Platforms
Quality Control
Rigorous material testing based on ASTM standards to ensure structural integrity.
Precision Machining
Advanced CNC processing for the disc and stem to ensure a bubble-tight seal.
Fast Lead Times
Optimized supply chain for rapid production and delivery of standard Model 25 units.
Custom Engineering
Ability to customize seat and stem materials to meet specific chemical requirements.
Global Shipping
Secure packaging and logistics network for safe worldwide delivery.
Technical Support
Expert guidance on valve selection and installation for maximum operational efficiency.
Investment Return Comparison
| Feature | Standard Valves | Model 25 Butterfly Valve | Impact |
|---|---|---|---|
| Install Time | High (Flanged) | Low (Wafer) | Lower Labor Cost |
| Material Life | Average | High (SS/Ductile Iron) | Reduced Replacement |
| Seal Integrity | Variable | High (Precision Seat) | Zero Leakage Loss |
| Weight/Space | Heavy/Bulky | Compact/Light | Reduced Shipping Cost |
| Maintenance | Frequent | Infrequent | Higher Uptime |
Frequently Asked Questions
Wafer valves are sandwiched between two flanges, making them more compact and cost-effective, whereas lug valves have threaded inserts that allow them to be bolted directly to the pipe.
For high-temperature environments, Viton or PTFE are recommended due to their superior thermal stability compared to NBR or EPDM.
Yes, the design allows for the integration of pneumatic or electric actuators, depending on the stem configuration and operation requirements.
The long neck provides better clearance for operation, especially when the valve is installed behind insulation or in tight structural spaces.
The disc can be supplied in Stainless Steel (CF8/CF8M) or Ductile Iron with Nickel plating or Nylon coating to ensure maximum resistance to corrosion.
Yes, with the selection of EPDM seats and Stainless Steel internals, the Model 25 is highly suitable for water distribution and potable water applications.
