China 4 inch Ductile Iron Split Body PTFE Full Lined Wafer Butterfly Valve Factories, Exporters
Product Description
PTFE lined butterfly valve is suitable for transporting various toxic and highly corrosive chemical gases and liquids. It has good anti-corrosion performance and is suitable for sulfuric acid, sodium hydroxide, potassium hydroxide, neutral salt solution and ammonia liquid, cement, and clay, cinder ash, granular fertilizers and highly abrasive solid fluids with various concentrations and thick liquids, etc.
Passed multiple sealing safety tests. The valve body is equipped with an oil sealing back-up ring, and there is no visible gap between the sealing pairs, achieving zero leakage. The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent jamming caused by thermal expansion and contraction.
The valve body adopts a split double valve body structure design, which can be installed in any position, is easy to maintain, and meets the requirements of various working conditions.
PTFE lined wafer butterfly valve has short structure size, light weight and easy installation.
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN600 |
| 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 | |
|---|---|
| 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) coated with PTFE |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | PTFE / RPTFE |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
PTFE lined butterfly valves provide exceptional chemical corrosion resistance, making them ideal for handling aggressive acids like sulfuric acid, strong alkalis such as sodium hydroxide and potassium hydroxide, neutral salt solutions, ammonia liquid, and highly abrasive solid suspensions including cement, clay, cinder ash, and fertilizers.
The valve incorporates a high-grade oil sealing back-up ring inside the valve body. Sealing pairs are engineered to fit precisely with no visible gaps, passing rigorous sealing safety tests to guarantee zero bubble-tight leakage under rating pressures.
The split two-piece body design offers structural rigidity while allowing simple field disassembly and maintenance. It supports flexible multi-position installation and accommodates thermal expansion and contraction without disc seizure.
Standard sizes range from DN40 to DN600. The valves are compatible with multiple pressure ratings including PN10, PN16, Class 150, JIS 5K, and JIS 10K, conforming to international standards such as API 609, DIN 3202, and ISO 5752.
Featuring a standardized ISO 5211 upper flange mounting pad, the valve readily interfaces with manual hand levers and gearboxes, as well as automatic electric or pneumatic actuators for modern process automation.
