China Extention Stem Wafer Butterfly Valve Manufacturer, Exporters
Product Description
Body & Seat Pressure Testing
Body Test: The valve body test uses 1.5 times the standard pressure. The test should be done after installation, with the valve disc half closed, called the body pressure test. The valve seat uses 1.1 times the standard pressure.
Standard Execution & Inspection
ZFA Valve strictly executes the API598 standard. We conduct both-side pressure testing for 100% of the valves, guaranteeing the delivery of 100% quality valves to our customers.
Precision Casting & Traceability
All valve bodies are made by precision casting using DI, WCB, Stainless Steel, and many other materials, offering a perfect appearance. Each batch has its casting stove number, making it easy to trace for material protection.
CNC Machining Disc
We use CNC machining to process the valve disc, strictly controlling the precision of the valve in-house to guarantee optimal sealing properties from low to high temperatures.
Solid Body & Tempered Stem
Our valve stem is made of stainless steel; its strength is enhanced after tempering, reducing deformation risks. Additionally, ZFA valve bodies feature a solid body design, providing greater weight and durability than standard types.
Seat Design & Coating
Bolts and nuts use SS304 for enhanced rust protection. The body utilizes high-adhesive epoxy resin powder. The seat features a wide edge design for easier sealing and installation, with a stem lug boss and O-ring ensuring reliable secondary sealing.
| 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 |
