Cast Carbon Steel Butterfly Valve, EN 593, WCB, 32 IN, CL300

Triple Eccentric 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: DN800 (32 Inch)
Nominal class: PN25 (Class 300 LB)
End connection: BW
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

The three eccentric laminate hard seal flange butterfly valve is a durable and energy-efficient valve, designed for long-lasting performance. It features a three-dimensional core principle design, with a valve seat made from a laminated structure of stainless steel and graphite, combining both hard and soft sealing properties for optimal performance. The valve's main components include the valve body, butterfly disc, laminated seal valve seat, valve stem, and transmission mechanism, all crafted with precision and advanced technology. This versatile valve is widely used in industries such as metallurgy, electric power, petroleum, chemicals, and in air, gas, combustible gas, and water supply and drainage pipelines.

Triple Eccentric Butterfly Valve - Features

The three eccentric (offset) design features three distinct offsets that enhance the valve's performance. The first offset occurs when the shaft is positioned away from the centerline of the sealing face. The second offset involves the shaft being deviated from the centerline of the pipe and valve. The third offset is the unique angle between the oblique taper of the eccentric seat and the centerline of the pipe, ensuring that the seat completely disengages from the sealing ring during the entire opening and closing process. This design leverages the cam effect, effectively eliminating the risk of abrasion and leakage.



1. The composite metal sealing ring's elastic properties ensure zero leakage.
2. The torque seal provides bi-directional zero leakage.
3. The STL one-piece hard surface seat is versatile, suited to various working conditions, offering a long service life and easy maintenance.
4. The one-piece cast body has face-to-face dimensions that comply with ISO 5752, ASME B16.10, and API 609, allowing it to replace high-performance butterfly valves and other types of valves, facilitating easy and flexible installation.
5. The all-metal structure and leak-tight performance give the valve an intrinsically fireproof property.
6. The anti-blowout stem enhances reliability, fully complying with API 609 standards.
7. The stem of the triple eccentric butterfly valve is a shaft, with the stem and disc connected by a key or a pin-key combination.

Triple Eccentric Butterfly Valve - Specifications and Materials

1. Designed: 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 Materials: 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: Metal to metal seat, solid seat
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.