Cast Steel Flanged Butterfly Valve

Eccentric Butterfly Valve -> Cast Steel Flanged Butterfly Valve

The Triple Eccentric Butterfly Valve, which makes use of a metal seat, is therefore able to withstand a greater amount of pressure, compared to Resilient Seated Butterfly Valve. The seal of the eccentric disc could be either metal/Graphite multi-layer design, or fully metal-to-metal design. The multi-layer design could achieve zero leakage and simple maintenance, while the metal-to-metal design is more reliable in higher temperature and pressure. Basically speaking, triple eccentric Butterfly Valve is both applied in shutoff or throttling service.

Flanged butterfly valves have longer face-to-face dimensions and stronger structure, compared with wafer or lug type butterfly valves. The machining process is therefore more complicated than that of wafer or lugged butterfly valves. For butterfly valves size larger than 24", flanged end is recommended for longer service.

Features of Cast Steel Flanged Butterfly Valves:

Eccentric Disc Design
Multi-layer Disc Seal Standard
Fully Meal-to metal Seal Optional
Uni-directional Flow
Wafer Body Type, Lug Type or Flanged Type

Applicable Standards of Cast Steel Flanged Butterfly Valves:
a) Design & Manufacture: API 609, EN 593, MSS SP-68
b) Face to Face Dimension: API 609, EN 558
c) End Connection: ASME B16.5, EN 1092, JIS B2220
d) Test and Inspection: API 598, EN 12266

Sizes: 2" - 48" or DN50 - DN1200
Pressure Rating: Class 150 - Class 600 or PN10 - PN100
Materials of Valve Body: WCB, LCB, WC6, WC9, CF8, CF3, CF8M, CF3M, etc.
Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator

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