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    Cast Iron Wafer Type Butterfly Valve Technical Specification

    1. Introduction to cast iron wafer type butterfly valve.

    The butterfly valves is a quarter-turn rotary valve which has a round disc as closure member that is rotated through 90 degrees to open or close the flow passage. As an inexpensive metal, cast iron(grey iron or ductile iron) is mostly used in concentric butterfly valves for simple on-off applications. The wafer type refers to its valve body style and sometimes it is also called flangeless type.The wafer type body is a flat body that has a minimal face-to-face length, which is usually equals to twice the required wall thickness plus the width of the packing box. Hebei Metals Industrial Limited generally supplies and stocks wafer type cast iron butterfly valves from 2" to 12". Sizes larger than 12" in wafer type are also available upon request. 

    2. G.A drawing of cast iron wafer type butterfly valve.

    G.A drawing of cast iron wafer type butterfly valve

    3. Materials for cast iron wafer type butterfly valve.

    ITEM NO.
    DESCRIPTION
    MATERIALS
    1
    Body
    ASTM A126 Grey Iron, ASTM A536 Ductile Iron
    2
    Disc
    Ductile Iron, Aluminum Bronze, SS304, SS316, Monel
    3
    Stem
    SS416, SS304, SS316, Monel
    4
    Seat
    Buna-N, EPDM, PTFE, Neoprene, Viton
    5
    O-Ring
    Buna-N(Viton as optional)
    6
    Bushing
    PTFE

    4. Dimensions and data sheet.

    SIZE
    HA
    HB
    HC
    L
    Φ A
    DIN PN10
    DIN PN16
    ASME B16.1
    JIS 10K
    DN
    INCH
    Φ C
    n - Φ
    Φ C
    n - Φ
    Φ C
    n - Φ
    Φ C
    n - Φ
    50
    2"
    66
    130
    30
    43
    12.7 
    125
    4-18
    125
    4-18
    129.5
    4-19
    120
    4-19
    65
    2-1/2"
    75
    140
    30
    46
    12.7 
    145
    4-18
    145
    4-18
    139.5
    4-19
    140
    4-19
    80
    3"
    95
    150
    30
    46
    12.7 
    160
    4-18
    160
    8-18
    152.5
    4-19
    150
    8-19
    100
    4"
    107
    170
    30
    52
    15.8 
    180
    8-18
    180
    8-18
    190.5
    8-19
    175
    8-19
    125
    5"
    122
    185
    30
    56
    19.1 
    210
    8-18
    210
    8-18
    216
    8-22
    210
    8-23
    150
    6"
    134
    205
    30
    56
    19.1 
    240
    8-23
    240
    8-23
    241.5
    8-22
    240
    8-23
    200
    8"
    168
    235
    36
    60
    22.2 
    295
    8-23
    295
    12-23
    298.5
    8-22
    290
    12-23
    250
    10"
    200
    270
    36
    68
    28.6 
    350
    12-23
    355
    12-27
    362
    12-25
    355
    12-25
    300
    12"
    237
    305
    36
    78
    31.8 
    400
    12-23
    410
    12-27
    432
    12-25
    400
    16-25
    350
    14"
    262
    330
    36
    78
    31.8 
    460
    16-23
    470
    16-27
    476
    12-29
    445
    16-25
    400
    16"
    300
    360
    51
    102
    33.3 
    515
    16-27
    525
    16-30
    539.5
    16-29
    510
    16-27
    450
    18"
    350
    395
    51
    114
    38.0 
    565
    20-27
    585
    20-30
    578
    16-32
    565
    20-27
    500
    20"
    375
    440
    64
    127
    41.2 
    620
    20-27
    650
    20-33
    635
    20-32
    620
    20-27
    600
    24"
    435
    500
    71
    154
    50.7 
    725
    20-30
    770
    20-36
    749.5
    20-35
    730
    24-33
     *DIN refers to flange bolting dimensions of European and German standards.
     *JIS refers to flange bolting dimensions of JIS B2220.
     *ASME B16.1 refers to ANSI/ASME flange bolting dimensions.
     *All dimensions are in mm unless otherwise specified.

    Views: 4595  Author:METALS INDUSTRIAL  Date:2015/02/23