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CF8 Gear Operated Butterfly Valve , PN6 Ss 304 Butterfly Valve Paper Making Use

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Address: NO.1-1Qianjie Street High-tech Zone Longwan District Wenzhou City Zhejiang Province China

Contact name:Windust Wang

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CF8 Gear Operated Butterfly Valve , PN6 Ss 304 Butterfly Valve Paper Making Use

Country/Region	china
City & Province	wenzhou zhejiang
Categories	Valves

Product Details

PTFE Full Lined CF8 SS304 Body Butterfly Valve for Paper Making

Technical Specification

Design and Manufacture Standard: ASME B16.34, HG/T 3704

Face-to-face Dimension: ASME B16.10 , GB/T 12221

Flange Standard: ASME B 16.5 ,GB/T 9119 ,DIN ,JIS

Inspection and Testing: API 598, GB/T 13927

Product Specification
Body Material: WCB, ASTM A395 , CF8 ,CF8M

Lining Material: PTFE , PFA , PO ,FEP, EPDM

Nominal Diameter: 2"-80"(DN50~DN2000)

Pressure Range: Class150 , PN6 , PN10 , PN16

Connection Type: Flange ,Wafer , Lug Connection

Operation Method: Manual ,Worn gear ,Electric ,Pneumatic actuator

Primary and Secondary Shaft Sealing

The primary seal is formed by the flexible, spherically molded liner, sealing against the matching spherically machined disc hub when compressed by the resilient elastomer backup liner. The PFA liner as well as the PFA shaft over-molding extends into the valve body itself. Tight compression is maintained at the hub area and around the shaft by the resilient back-up liner combined with the flexible PFA liner, forming an independent secondary seal.

Upstream/Downstream Sealing

The dense PFA body liner is flexible, and allows the resilient elastomer back-up liner to compress the spherically molded PFA liner into the spherically machined shaft-disc with enough force to create a tight seal. This is in contrast to PTFE liners which are usually thick sinterings resulting in a stiff liner unable to give tight shut-off over a long period of time. The wide elastomer backup liner in the rests in a machined body

groove which is essential in providing tight shutoff for end of line service at full pressure. This has enabled the valve to be used for pump and

vessel isolation as well as other difficult services.

Safety Sealing

A third seal is provided by a graphite filled PTFE safety seal, which provides force against the junction of the PFA liner and PFA over-molded shaft. This seal is constantly energized by a coil spring, and self compensates for temperature changes and wear.

Flange Sealing

Provided by compression of the liner between the valve body and the flanges. An elastomer o-ring, fitted underneath the PFA liner, allows

proper flange sealing with warped flange faces or in vacuum applications.