ASTM A216 WCB Butterfly Valves, DN400, PN40, Double Flanged

As a leading China double flanged butterfly valves factory, we manufacture high-performance valves engineered for demanding flow control applications. Designed in accordance with API 609 standards, this DN400, PN40 butterfly valve combines a durable carbon steel ASTM A216 WCB body with a corrosion-resistant ASTM A351 CF8M stainless steel disc for reliable operation under high pressure. The precision-machined 17-4PH stainless steel stem provides superior strength and wear resistance, while the RPTFE seat ensures tight sealing, low torque, and long service life. Built for efficiency and durability, our double flanged butterfly valves deliver trusted performance across industrial and commercial systems.
 

Product Name: Double Flanged Butterfly Valve
Design: API 609
Body Material: ASTM A216 WCB
Diameter Nominal: DN400
Nominal Pressure: PN40
Disc: ASTM A351 CF8M
Stem: 17-4PH
Seat: RPTFE
Connection Ends: Double Flange Ends
Face to Face: EN 558 / Row 20
Test and Inspection: API 598

High Performance Butterfly Valve
Valve Design: API 609
Double Offset
Soft Seat, Replaceable Seat
Fire Safe Seat Ring & Fire Safe Seat Insert: API 607
Valve design is sealing: Bi-Directional 

Type: Lug, Wafer, Double Flanges

Valve Face to Face: API 609
Testing & inspection: API 598 - tight A

Body: Cast Material Carbon Steel, Stainless Steel, Al-bronze
Disc: Stainless Steel, Aluminum Bronze, Titanium Alloy
Stem: 17-4PH / ASTM A182 F51 / MONEL
Seat: PTFE, RPTFE, PPL, TFM 1600
Operation: Lever, Gearbox + HW

Operation: Manual Gear Operator with Hand Wheel + Position Indicator
to be done ANTI-ACID paint coating