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China Suppliers Factory Resilient Seated Double Flanged Butterfly Valve DN50-DN2800 with Durable Materials
Description
Butterfly valves control fluid by turning a disc to open or block the fluid flow path. The valve is mounted between pipe flanges, with the disc diameter matching the inside pipe diameter.
The most common type of butterfly valves are of "concentric" design: the turning axis and axial alignment of the disc are both centered with the valve body. Most concentric butterfly valves achieve sealing by compressing the edge of the disc against an elastomeric valve seat. This type of sealing is often referred to as "resilient seated" butterfly valves.
Features
- ✔ Rugged epoxy coated ductile iron body with stainless steel disc for maximum corrosion resistance
- ✔ Extended life span of valve and seals with unique wave line seat and special disc shape
- ✔ Reduced torque from wave seal and disc design reduces size of actuator, lowering the cost
- ✔ Increased flow capacity with unique profile disc and two piece shaft design
- ✔ Valves direct mount to actuator using standard ISO5211 international standards
Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | Ductile iron / CF8 / CF8M / WCB / Duplex / Al-Bronze / Aluminium Etc. |
| 2 | Seat Material | EPDM / NBR / Buna / Viton / PTFE / Hypalon / Silicone / Neoprene Etc. |
| 3 | Stem Material | 45# / SS420 / SS410 / SS416 / SS316 / SS304 / Duplex stainless steel Etc. |
| 4 | Disc Material | DI+Ni, CF8, CF8M, CF3M, Duplex SS, Al-Bronze, DI+Nylon, DI+PTFE, DI Epoxy Etc. |
| 5 | Gear Box | Ductile iron / Aluminum |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
Valve Standard
| Category | Details |
|---|---|
| Type | Flanged |
| Face to Face | BS5155, EN593, EN558-1 Series 13, ISO5752 |
| Flange Drilling | EN1092 PN10/PN16 / JIS 5K/10K / ANSI150 / AS Table D/E / SANS |
| Mounting Flange | ISO5211 |
| Pressure Rating | PN10, PN16, 150PSI, 200PSI, Class 150 |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical/Petrochemical Processing, Power and Utilities, Paper and Pulp, Marine |
Dimensions (mm)
More Details
Frequently Asked Questions
Q
What is a double flanged butterfly valve and how does it work?
A double flanged butterfly valve controls fluid flow by rotating a disc inside the valve body. The disc is mounted on a central shaft and turns 90° to either fully open or fully close the flow path. The valve is secured between two pipe flanges using bolts, providing a secure and leak-tight connection suitable for a wide range of industrial applications.
Q
What materials are available for the body and disc of the butterfly valve?
The valve body is available in ductile iron, CF8, CF8M, WCB, Duplex, Al-Bronze, and Aluminium. The disc can be manufactured from DI+Ni, CF8, CF8M, CF3M, Duplex stainless steel, Al-Bronze, DI+Nylon, DI+PTFE, or DI Epoxy, allowing selection based on the specific fluid and operating environment.
Q
What flange drilling standards are supported?
These butterfly valves support a wide range of international flange drilling standards, including EN1092 PN10/PN16, JIS 5K/10K, ANSI 150, AS Table D/E, and SANS, making them compatible with piping systems across different regions and industries.
Q
What pressure ratings are available for these butterfly valves?
The double flanged butterfly valves are available in pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150, covering most standard industrial and commercial pipeline requirements.
Q
What are the typical applications for double flanged butterfly valves?
These valves are widely used in HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical industries, power generation and utilities, paper and pulp production, and marine applications due to their versatility and reliable sealing performance.
Q
Can the butterfly valve be directly mounted to an actuator?
Yes. The valves are designed for direct mounting to actuators using the standard ISO5211 international mounting interface. The unique wave seal and disc design also reduces operating torque, which allows the use of a smaller actuator and helps lower overall system costs.