EN 593 Butterfly Valve, WCB, 20 Inch, 150 LB, DN500, PN16, RF

Triple Offset Butterfly Valve

Valve Description: Butterfly valve, triple eccentric, metal laminate seat, uni-directional, cast carbon steel

Body Material: ASTM A216 WCB
Disc Material: ASTM A351 CF8
Nominal Diameter: DN500, 20 Inch
Nominal Class: PN16, Class 150 LB
End Connection: Flange
Metal Seat: SS 304 + graphite
Design: EN 593
Face to Face: ISO 5752
Flange End: GOST 12815
Mode of Operation: Gear
Test and Inspection: EN 12266

Tripe offset laminate hard seal flange butterfly valve is a long-life, energy-saving butterfly valve. Its structure adopts the three-dimensional core principle design, and the valve seat adopts the laminate stainless steel with graphite structure of hard and soft sealing compatibility, with exquisite processing and advanced technology. This product is composed of valve body, butterfly disc, laminate seal as valve seat, valve stem, transmission mechanism and other main components. It is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage pipeline.

Triple Offset Butterfly Valve - Features

There is three eccentric (offset), the first eccentric, the shaft deviated from the centerline of sealing face; The second eccentric, the shaft deviated from the centerline of pipe and valve; The third eccentric the distinctive included angle between oblique taper angle of eccentric seat and centerline of pipe, thus making seat completely disengaged from the sealing ring during the whole process of open and close. This structure not only uses cam effect, but also eliminates the possibility of abrasion and leakage.



1. Elastic property of composite metal sealing ring to perform zero leakage.
2. Torque seal to ensure two -way zero leakage.
3. STL one piece hard surface seat may be adapted to many working conditions, which is featured by long service life and easy maintenance.
4. One piece cast body, face to face dimensions conforming to ISO 5752, ASME B16.10 and API 609, replacement to high performance butterfly valves and other types of valves, easy and flexible installation.
5. Intrinsically fireproof property thanks to all metal structure and leak tight performance.
6. Anti-blowout stem for high dependability, completely conforming to API 609
7. The stem of triple eccentric butterfly valve is a shaft. The stem and disc are connected by key or pin-key combination.

Triple Offset Butterfly Valve - Specifications and Materials

1. Design: API 609, ASME B16.34, AWWA C504, BS EN 593
2. Face to Face: API 609, AWWA C504, BS 2080, and ISO 5752
3. Flange End: ASME B16.5, ASME B16.47, BS EN 1092, ISO 7005, GOST
4. Inspection Test: API 598, BS EN 12266, ISO 528
5. Materials Choose Body Materials: Carbon Steel ASTM A216 WCB, WCC, Low Temperature Carbon Steel ASTM A352 LCB, A352 LCC, A352 LC1, A352 LC2; Alloy Steel Chrome Moly ASTM A217 WC6, A217 C5, A217 WC5, A217 C12, A217 C12A, A217 WC9, 1.7335, 1.7380, 1.7362, 1.7386, 1.4903; STAINLESS STEEL ASTM A351 CF3, A351 CF8, A351 CF3M, A351 CF8M, A351 CF8C, 1.4301, 1.4306, 1.4401, 1.4404, 1.4550, 1.4438; ALLOY 20 ASTM A351 CN7M, N08020, 1.4438; DUPLEX STEEL 2205 ASTM A351 CD3MN, A890 2205, S31803, 1.4462; SUPER DUPLEX STAINLESS STEEL ASTM A351 CD4MCu, A890 5A, S32750, 1.4501; SUPER DUPLEX F55, ASTM A995 CD3MWCuN, S32760
6. Disc material: ASTM A216 WCB, WCC, ASTM A352 LCB, ASTM A351 CF8M, CF3M, CF8, CF3, ASTM A890 4A, 5A, ALLOY 20, duplex stainless steel, Monel, hastelloy steel
7. Seat Materials: SS 304+graphite, SS 316+Graphite, PTFE
8. Pressure: PN10, PN16, PN25, PN40, PN63, PN100, 150 LB, 300 LB, 600 LB, 900 LB (PN10-PN100, Class 150-900 LB)
9. Size: DN50-DN3200, 2 Inch - 128 Inch
10. Drive Mode: Manual/Worm gear/Electric/Pneumatic
11. Field of Application: Electric/Hydraulic/Municipal Engineering etc; Water/Sea water/Gas etc.