China U Section Flange Butterfly Valve Manufacturer, Factories
Product Description
A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates.
The gear operated U-shaped butterfly valve is mounted between two flanges. Butterfly valves are held in place by bolts or studs and nuts between the flanges. Of course, it is not possible to disconnect only one side of the piping system from the valve with this type of installation.
All surfaces of the valve interior are clean, dry and free from grease before painting. The valve surfaces are coated with epoxy coating approved for drinking water applications.
Simple structure, good interchangeability and low price.
The valve stem seal is not easy to deform, avoids normal valve stem leakage, and the overall support is good, stable and firm.
The less seat rubber, the less likely it is to swell, making it easier to keep torque within the proper range.
The two-piece valve stem with pinless connection has a simple and compact structure, and is very convenient for maintenance and disassembly.
The butterfly plate has the function of automatic centering, and the butterfly plate and the valve seat are closely matched.
The phenolic back seat is non-shedding, stretch-resistant, leak-proof and easy to replace.
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN1200 |
| Pressure Rating | PN10, PN16, CL150, JIS 5K, JIS 10K |
| Face to Face STD | API609, BS5155, DIN3202, ISO5752 |
| Connection STD | PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259 |
| Upper Flange STD | ISO 5211 |
| Material Specifications | |
| Body | Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy. |
| Disc | DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
A butterfly valve is designed to isolate or regulate the flow of fluid in a pipeline system through the rotation of an internal closing disc.
The gear operated U-shaped butterfly valve is secured between two pipe flanges using bolts or studs and nuts, requiring both sides to remain connected during operation.
All interior surfaces are cleaned, dried, and degreased before being finished with an epoxy coating that is approved for drinking water applications.
The valves are available in sizes ranging from DN40 to DN1200, with pressure ratings including PN10, PN16, CL150, JIS 5K, and JIS 10K.
The phenolic back seat is non-shedding, stretch-resistant, and leak-proof, while the two-piece pinless stem provides a compact structure that simplifies disassembly and ongoing maintenance.
The valve conforms to the ISO 5211 upper flange standard and can be operated via hand lever, gear box, electric actuator, or pneumatic actuator.
