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DIN BS EN ANSI JIS KS GOST PN16 PN10 D71H-16C Butterfly Valve Factory

DIN BS EN ANSI JIS KS GOST PN16 PN10 D71H-16C Butterfly Valve Factory

Country/Region china
Company hjfitting limited
Categories Flanged Butterfly Valve
Update 2017-08-01 10:25:50
ICP License Issued by the Chinese Ministry
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DIN BS EN ANSI JIS KS GOST PN16 PN10 D71H-16C Butterfly Valve Factory

Wafer type Butterfly Valve 1.Technical Specification 2.Main Parts and Materials 3.Dimensions Wafer LG type Butterfly Valve 1.Technical Specification 2.Main Parts and Materials 3.Dimensions
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  • Description

  • A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates.

    Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they cost less than other valve design, and are lighter weight so they need less support. The disc is positioned in the center of the pipe. A rod passes through the disc to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so it induces a pressure drop, even when open.

    A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.

    There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero-offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating. The high-performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two).

    This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is created in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the triple offset butterfly valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat.

    In the case of triple offset valves the seat is made of metal so that it can be machined such as to achieve a bubble tight shut-off when in contact with the disc.

    Wafer type Butterfly Valve

    1.Technical Specification

    Design:

    Face to Face:

    ISO 5752;API 609;DIN 3202

    Flanges:

    ISO 7005-2 PN10/PN16;ASME B16.1;DIN 2501PN10/16;

    BS4504 PN10/16

    Test:

    API 598

    2.Main Parts and Materials

    Material

    Part

    Material

    Part

    Material

    Body

    CI/DI

    Disc

    DI/CS/SS

    Seat

    NBR/PTFE/EPDM

    Stem

    Carbon Steel/SS

    3.Dimensions

    Size

    PN10/16

    A

    B

    L

    D1

    D3

    Weight/KG

    15

    20

    25

    32

    40(11/2")

    69

    136

    32

    65

    35.25

    50(2")

    80

    161

    42.04

    65

    35.25


Product Tags:

double flanged butterfly valve

      

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three piece flange butterfly valve

      
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DIN BS EN ANSI JIS KS GOST PN16 PN10 D71H-16C Butterfly Valve Factory Images

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