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Flangeless Two Offset High Performance Double Eccentric Butterfly Valve For Steam Pipe
Descriptions:
API 609 High performance butterfly valves are available in either a flangelss wafer or a single flange design, with a variety of seal, valve body and internal components. The valves features a dynamic sealing design that is used in various industries.
Applications
| Constructions | Steel and Iron Works | Shipping Building |
| Chemical/Petro-Chemical | Commercial | Hydrocarbon processing |
| Liquefied Gas / Refrigeration | Pulp and paper | Gas Piping |
| Heavy Industrial | Oil Refineries and Oil Filed | Energy Supply |
Seal Temperature Capabilties
PTFE: -62 to 180 ℃
RPTFE: -62 to 230 ℃
Metal Seal: to 820 ℃
LCC seat: Until -196 ℃
Features:
Body: Available in Wafer and lug body configuration. Made from Carbon steel or CF8M stainless steel. Boyd lengths conform to API609 and MSS SP68 dimensions. Flange gaskets surfaces shall be serrated and be 125 to 250 μ inch in accordance with MSS SP-6, MSS SP-44 and ANSI b16.5
Disc: Heavy duty eccentric disc is applied with wide sealing area to minimize seat wearing. All discs is of a corrosion resistant material suitable for the intended services. Disc is securely attached to the stem by groove pins.
Seat: Three types of seals are available for various applications: soft thermoplastic, fire tested and metal-to-metal. All seats are interchangeable without body medications; other component changes may be required. All seats shall be pressure responsive from either directions.
Stem: one piece stem positioned in the body in a double off-set configuration to allow the disc to swing free of the seat in the open position; thereby reducing operating torque and wear on the seat. The stem made of corrosion resistant material capable of transmitting operating torque without failure.
Component Detail for Metal-to-metal Seal