China 24 Inch Butterfly Valve Suppliers, Manufacturers, Factory

Size Range:2" - 20" (50mm - 500mm)
Body Style:Double Flanged
Temperature Range:-20°F to 400°F (-29°C to 204°C)
Pressure Ratings:Bidirectional Bubble-tight Shutoff: to 250 psi (17.2 Bar)
Body (CWP): 250 psi (17.2 Bar)
Body Materials:Cast Iron, Ductile Iron, Carbon Steel
Disc Materials:Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel
Stem Materials:Stainless Steel, Monel K500
Seat Materials:Bonded BUNA-N, Bonded EPDM, Bonded FKM*
Applications:Wastewater, Seawater

Components and Materials

Item	Name	Material	Qty.
1	Body	Cast Iron Ductile Iron Carbon Steel	1
2	Disc	Nickel Aluminum Bronze Coated Ductile Iron Nylon 11 Coated Ductile Iron Halar® Coated Ductile Iron 304 Stainless Steel 316 Stainless Steel Duplex Stainless Steel Super Duplex Stainless Steel Hastelloy®	1
3	Stem	416 Stainless Steel 304 Stainless Steel 316 Stainless Steel Monel K500	1
4	Seat	Bonded EPDM Bonded BUNA-N Bonded FKM*	1

Series 3A/3AH Exploded View

Valve Type:
Body:	Shall be one piece double flanged and comply with ISO 5752 – Table 2 (Short pattern) face-to-face with extended neck to allow for 2" of piping insulation. Flange hole drilling per international flange standard as specified. A non-corrosive bushing and a self-adjusting stem seal shall be provided. No field adjustment shall be necessary to maintain optimum field performance.
Disc	Disc edge and hub on metal discs shall be spherically machined and hand polished for minimum torque and maximum sealing capability.
Stem:	Shall be one piece design Disc to stem connection shall be an internal double "D" design with no possible leak paths in the disc-to-stem connection. External disc-to-stem connections such as disc screws or pins are not allowed. Stem shall be mechanically retained in the body neck and no part of the stem shall be exposed to the line media.
Seat:	Shall be a bonded seat with a primary hub seal and a molded flange O-ring suitable for weld-neck and slip-on flanges. The seat shall totally encapsulate the body isolating the body from the line media and no flange gaskets shall be required.
Testing:	Valve shall be tested to 110% of the rated pressure.
Pressure Ratings:	Valve shall be rated for bubble-tight shut-off at pressure rating shown below.
All Resilient Seated Series 3A valves: 2"-12" (50mm-300mm) 175 psi (12.0 Bar) 14"-20" (350mm-500mm) 150 psi (10.3 Bar)