01
China Suppliers Factory Resilient Seated Double Flange Concentric Butterfly Valve DN50-DN2800
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.
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
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 stem; when turned 90°, it either opens or blocks the flow path. The valve connects to the pipeline via flanges on both sides, ensuring a secure, leak-free installation. The disc diameter matches the pipe's inner diameter for optimal flow control.
What seat materials are available for this butterfly valve?
The valve is available with a wide range of seat materials to suit different media and operating conditions, including EPDM, NBR (Buna), Viton, PTFE, Hypalon, Silicone, and Neoprene. Please specify your application requirements when ordering to ensure the best material selection.
What flange drilling standards does this valve support?
This double flanged butterfly valve supports multiple international flange drilling standards, including EN1092 PN10/PN16, JIS 5K/10K, ANSI 150, AS Table D/E, and SANS. This broad compatibility makes it suitable for a wide range of global pipeline systems and projects.
What are the typical applications for this butterfly valve?
This valve is widely used across many industries, including HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical plants, power generation and utilities, paper and pulp manufacturing, and marine applications.
Can this valve be directly mounted to an actuator?
Yes. The valve features a direct-mount design that is fully compatible with ISO5211 international mounting standards. This allows easy and secure direct mounting to pneumatic, electric, or hydraulic actuators without the need for additional brackets or adapters, reducing installation time and overall system cost.
What pressure ratings are available for this butterfly valve?
The double flanged butterfly valve is available in pressure ratings of PN10, PN16, 150 PSI, 200 PSI, and Class 150. Please confirm the required pressure rating for your specific application when placing an order to ensure safe and reliable operation.