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Wafer & Log Type Pressure Relief Valve Manual Galvanized Disc

Categories Butterfly Valves
Brand Name: OEM
Model Number: D71X / D371X
Certification: WRAS/ ISO 9001
Place of Origin: Shanghai , China
MOQ: 1pcs
Price: negotiation
Payment Terms: T/T advance or L/C at sight
Supply Ability: 90,000pcs per month
Delivery Time: 1usually within 35 days after received your payment
Packaging Details: Usually packing by plywood case suit for sea delivery
Product Name: butterfly valve
Application: Sewage, water etc.,
Size: DN50 ~DN3000
Pressure: PN10/16/125lbs/150lbs/JIS 5K/JIS10K
Standard: DIN / BS / AWWA / JIS
Temperature: -20~120 C
Body: Cast iron/ ductile iron/ stainless steel
wedge: Ductile iron/ galvanized
Stem: 2Cr13
Seat: EPDM
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    Wafer & Log Type Pressure Relief Valve Manual Galvanized Disc

    Wafer Butterfly Valve , Ductile Iron Body/ Disc, Epoxy Powder Coating For Water

    APPLICABLE STANDARDS

    A. Design according : API 609

    B. Test standard according: JIS B2003

    C. Connect flange standard according: JIS B2212

    D. Face to face standard according: JIS B2002


    1. BRIEF INTRODUCTION:

    The butterfly valve is operated by the disc rotating form 0° to 90°, can be applied to cut off or regulate

    the flow of medium.


    The valve can be actuated by operating lever, handle wheel electric actuator or pneumatic actuator.


    Widely used for potable water supply, waste water treatment, electric power plant, gas supply,

    warm-air system, smelting plant, ship building, textile, petroleum, chemistry, or other light industries.


    2. Specification

    name

    Butterfly Valve

    Item No

    D373H-10K

    DN(mm)

    DN50~DN3000

    pressure(Mpa)

    1.0

    Test pressure

    (Mpa)

    Seal test

    1.1

    Body test

    1.5

    temperature

    ≤350℃

    medium

    Water, sewage, sea water, hot water etc.,


    3. FEATURES

    ⊙ Metal seated, good seal

    ⊙ Low weight

    ⊙ Low flow resistance

    ⊙ Small operation torque

    ⊙ Easy to install and maintain

    ⊙ Open-close 90° more smoothly


    4. Item Name of part Material Spec

    NO

    Part name

    Material

    1

    Body

    SS304

    2

    Gear box

    Assembly

    3

    Disc

    SS304

    4

    Stem

    SS416

    5

    Seal ring

    316+Graphite

    6

    packing

    Graphite


    5. Operation:

    5.1. The two pipe flange should be smooth.

    5.2. Put the butterfly valve in the pipe line, fixed the orientation hole first.


    6. Delivery:

    When delivery or store the butterfly valve, should keep in dry and cool environment.


    7. Note:

    7.1. Pipe flange should same as the butterfly valve flange.

    7.2. Check the valve before installed, the environment should correspond to the butterfly valve

    specification.

    7.3. Before open butterfly valve, checking the disc without dirt.

    7.4. The disc must be shut off place when installed.

    7.5. Adjusting the pipe connect before installed.

    7.6. The connect flange should be parallel.

    7.7. After installed, the pressure test disc should be open place.

    7.8. If the butterfly can not natural open or close, please kindly check it careful, can not strike, tamp or

    use extension lever.

    7.9. When maintenance or operation, must check the stem, lever, gear box or actuator have correctly

    connect. Otherwise the stem will be push by pipe pressure.


    8. The malfunction and resolving:

    malfunction

    whys

    solution

    Seal leak

    1, Some rubbish on the seal

    2, Seal have been light damage

    ① Clean the rubbish.

    ② Replacing the disc

    Stem Packing leak

    1, packing be damaged

    2, packing lapse

    ① Tighten the gland nut

    ② Change the packing

    flange leak

    1, the nut release

    2, gasket lapse

    1 . Tighten the nut

    2. Change the gasket


    9. Maintenance

    Open the worm box cover and add some butter per two months.

    Check the seal, packing and flange, if leak, please maintain ASAP.



    Specifications:

    Size: DN50 - 3000
    Temperature: -15℃ - 150℃
    Pressure: 1.0MPa/1.6MPa

    Materials
    Materials of Body : Ductile Iron (GGG40, GGG50). Cast Iron (GG25), Stainless Steel


    Materials of Disc : Stainless Steel. Nickel Plated, Ductile Iron, Ductile Iron Coated Plastic,

    Titanium Steel, Copper Alloy etc


    Materials of Seat : Ethylene-Propylene-Diene Monomer (EPDM), Polytetrafluoroethylene (PTFE),

    Nitrile Rubber (NBR), Chloroprene, Chlorosulfonated Polyethylene (Hypalon),

    Silicon, Fluoroelastomer (VITON) , Caoutchouc etc.


    Materials of Stem : Stainless Steel. Carbon Steel ,2Cr13


    A butterfly valve is a type of flow control device, typically used to regulate a fluid flowing through a section of pipe.
    The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center of the pipe.
    The plate has a rod through it connected to an actuator on the outside of the valve. Rotating the actuator turns the
    plate either parallel or perpendicular to the flow. Unlike a ball valve, the plate is always present within the flow,
    therefore a pressure drop is always induced in the flow regardless of valve position.


    Wafer Rubber Seated Butterfly Valves

    DN
    (mm)

    PN
    (MPa)

    Connection dimensions(mm)

    L

    D

    D1

    Zφd

    40

    1.0/1.6

    43

    145

    110

    4-18

    50

    43

    165

    125

    4-18

    65

    46

    185

    145

    4-18

    80

    46

    200

    160

    4-18/8-18

    100

    52

    220

    180

    8-18

    125

    56

    250

    210

    8-18

    150

    56

    285

    240

    8-22

    200

    60

    340

    295

    8-22/12-22

    250

    68

    395/405

    350/355

    12-22

    300

    78

    445/460

    400/410

    12-22

    350

    1.0

    78

    505

    460

    16-22

    400

    102

    565

    515

    16-26

    450

    114

    615

    565

    20-26

    500

    127

    670

    620

    20-26

    600

    154

    780

    725

    20-30

    700

    165

    895

    840

    24-30

    800

    190

    1015

    950

    24-33

    900

    203

    1115

    1050

    28-33

    1000

    216

    1230

    1160

    28-39

    1200

    254

    1455

    1380

    32-39

    1200

    0.6/0.25

    254

    1400/1375

    1340/1320

    32-34/32-30

    1400

    279

    1620/1575

    1560/1620

    36-34/36-30

    1600

    318

    1820/1785

    1760/1730

    40-34/40-30

    1800

    356

    2045/1985

    1970/1930

    44-41/44-30

    2000

    406

    2265/2185

    2180/2130

    48-48/48-30






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