PRODUCT CATEGORY

CONTACT US

skypefacebook twitter linkedin flickr youtube

Forged Flange and Forged Fittings Carbon Steel Pipe Fittings Industrial Valve seamless steel pipe Grooved Fitting

        HOME > TECHNICAL

    Cast Iron Lug Type Butterfly Valve Technical Specification

    1. Introduction to cast iron lug type butterfly valve.

    The lug type body has one integral flange with an identical hole pattern to the pipe flanges. Each hole is tapped from opposite direction, meeting in the center of the hole. This style allows the body to be placed between two flanges. A stud bolt can be inserted through the piping flange and threaded into the integral flange with a nut to secure the entire flange connection.The lug style designs are mainly used in thermal expansion applications in which the risks of straight-through bolting can't be taken while small size designs can't permit two integral flanges.
     

    2. Material specification

    Body: ASTM A126 Grey Iron, ASTM A536 Ductile Iron
    Disc: SS304, SS316, Monel, Aluminum Bronze, Ductile Iron.
    Stem: SS304, SS316, SS410, SS416, SS420, Aluminum-Bronze, Monel.
    Seat: Buna-N, EPDM, PTFE, Neoprene, Viton.
    O-Ring: Buna-N(Viton as optional).
    Bushing: PTFE, RPTFE

    3. Technical drawings of cast iron lug type butterfly valve

    cast iron lug type butterfly valve

    4. Dimensions (DIN / ASME)

    SIZE
    HA
    HB
    HC
    L
    Φ A
    DIN PN16
    ASME B16.1
    DN
    INCH
    Φ C
    n - M
    Φ C
    n - M
    50
    2"
    66
    130
    30
    43
    12.7 
    125
    4-M16
    129.5 
    4-5/8"
    65
    2-1/2"
    75
    140
    30
    46
    12.7 
    145
    4-M16
    139.5 
    4-5/8"
    80
    3"
    95
    150
    30
    46
    12.7 
    160
    8-M16
    152.5 
    4-5/8"
    100
    4"
    108
    170
    30
    52
    15.8 
    180
    8-M16
    190.5 
    8-5/8"
    125
    5"
    120
    185
    30
    56
    19.1 
    210
    8-M16
    216.0 
    8-3/4"
    150
    6"
    134
    205
    30
    56
    19.1 
    240
    8-M20
    241.5 
    8-3/4"
    200
    8"
    168
    235
    36
    60
    22.2 
    295
    12-M20
    298.5 
    8-3/4"
    250
    10"
    200
    270
    36
    68
    28.6 
    355
    12-M24
    362.0 
    12-7/8"
    300
    12"
    237
    305
    36
    78
    31.8 
    410
    12-M24
    432.0 
    12-7/8"
    350
    14"
    262
    330
    36
    78
    31.8 
    470
    16-M24
    476.0 
    12-1"
    400
    16"
    300
    360
    51
    102
    33.3 
    525
    16-M27
    539.5 
    16-1"
    450
    18"
    350
    395
    51
    114
    38.0 
    585
    20-M27
    578.0 
    16-1-1/8"
    500
    20"
    375
    440
    64
    127
    41.2 
    650
    20-M30
    635.0 
    20-1-1/8"
    600
    24"
    435
    500
    71
    154
    50.7 
    770
    20-M33
    749.5 
    20-1-1/4"
     *All dimensions are in mm unless otherwise specified.
      *DIN bolting dimensions are in conformance to EN1092-1.

     

    Views: 6837  Author:METALS INDUSTRIAL  Date:2015/02/24