Concentric Butterfly Valves
Concentric butterfly valves are designed for effective flow control in a variety of applications. Featuring a simple yet robust design, the valve’s disc is centrally positioned within the pipe, and it rotates around a central axis. This ensures that the disc and the valve seat are always in contact, providing a reliable seal.
These valves are ideal for low to medium pressure applications and are known for their cost-effectiveness, compact size, and ease of operation. The concentric design minimizes wear and tear, extending the valve’s lifespan and reducing maintenance requirements. Concentric butterfly valves are widely used in water treatment, HVAC, and general industrial processes, offering efficient and dependable performance.
Specifications
| Valve Types | Concentric Butterfly Valve |
|---|---|
| Body Materials | Carbon Steel, Stainless Steel, Cast Iron, Ductile Iron, Alluminium Bronze |
| Pressure Rating | Class 150~150, PN10-40, JIS10K~20K |
| Design Standards | API 609 |
| End Connection | Wafer, Semi Lug, Full Lug, Flange |
| Size | 2” ~ 64” |
(High Performance) Double / Triple Offset Butterfly Valves
The double-offset butterfly valve has two offsets. This offset is the displacement of the shaft from the centerline. The first offset is the displacement of the shaft from the centerline of the disc seat and body seal. This maintains a continuous sealing surface during the opening and closing of the valve. The second offset is the displacement from the centerline of the pipe or bore. This is to allow the disc and seal to easily lift off and away from the body seat.
The triple-offset butterfly valve has three offsets. In addition to the two offsets in the double-offset butterfly valve, the third offset is achieved by altering the geometry of the sealing component. Here, the seat is machined into an offset conical profile, resulting in a right-angled cone. The third offset eliminates rubbing and reduces wear between the seat and seal ring during operation. There will be no friction as the seal ring will immediately leave the valve seat when the valve is opened.
Specifications
| Valve Types | Double-offset / Triple-offset Butterfly Valve |
|---|---|
| Body Materials | Carbon Steel, Stainless Steel, Cast Iron, Ductile Iron, Alluminium Bronze |
| Pressure Rating | Class 150~150, PN10-40, JIS10K~20K |
| Design Standards | API 609 |
| End Connection | Wafer, Semi Lug, Full Lug, Flange |
| Size | 2” ~ 64” |