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Butterfly type micro resistance slow closing check valve
Tilting disc check valve

Butterfly type micro resistance slow closing check valve

Type:slow closing type

Series:HH48X-16Q

Size: DN40-DN2000/2”-80”

Pressure rating: PN10/PN16/150LB/300LB

Design standard: EN/DIN/API

Service: OEM&ODM

The butterfly slow-closing check valve is a specialized water hammer protection valve for pump room pipelines. It adopts an eccentric oblique butterfly plate structure, paired with an external hydraulic damping cylinder to form a two-stage slow-closing mechanism. With standard flange connection and horizontal pipeline installation, it is widely used in municipal water supply pressure stations, sewage treatment, fire protection pipe networks, central air conditioning circulating water systems, and large irrigation pump stations.

    Valve Type:

    Tilting disc check valve

    Structure:

    Swing type

    Standard:

    EN/DIN/API

    Workmanship:

    Investment casting

    Sealing direction:

    Single-directional

    Sealing grade:

    Zero leakage

    Temperature:

    -20°C<T<120°C

    Operation:

    Self-starting

    butterfly type check valve

    Characteristics

    This tilting disc slow closing check valve is made of epoxy coated GGG40 ductile iron. Equipped with external hydraulic buffer for two-stage closing to eliminate water hammer and impact noise. Full EPDM coated disc achieves zero leakage, low flow resistance saves pump power. Standard flanged design, widely applied in municipal water supply, sewage and fire protection pump station pipeline systems.

    butterfly type check valve

    Advantages

    1.The tilting disc slow closing check valve has two-stage slow closing structure greatly suppresses water hammer surge, prevents pump reversal and pipeline damage, reducing maintenance frequency for pump station systems.

    2.The eccentric disc slow closing check valve brings ultra-low flow resistance and large flow capacity, cutting long-term power consumption for continuous water delivery pump stations.

    3.Epoxy coated ductile iron body features excellent anti-corrosion performance. Standard flange size realizes direct replacement of old valves without pipeline reconstruction, saving engineering transformation cost.

    Packing

    Standard export wooden case packaging

    packing1

    Application Scenarios

    This water hammer proof one way valve widely used in municipal water supply pump stations, sewage treatment plant pipelines, high-rise fire water systems, HVAC circulating water pipes, large farmland irrigation pump stations and industrial park water supply mains.

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    Material of main parts

    Components name

    Valve body

    Valve petal

    Valve lever,cylinder,piston

    Spring

    Valve seat

    Material

    Cast iron,cast steel

    Carbon steel

    Stainless steel

    Stainless steel

    Ding nitrile rubber

    Main Dimension

    Dimension

    DN (mm)

    L

    H

    H1

    40

    140

    200

    88

    50

    150

    215

    98

    65

    170

    225

    108

    80

    180

    235

    118

    100

    190

    280

    130

    125

    200

    290

    148

    150

    210

    310

    172

    200

    230

    350

    210

    250

    250

    415

    240

    300

    270

    450

    264

    350

    290

    480

    297

    400

    310

    550

    324

    450

    330

    585

    351

    500

    350

    640

    379

    600

    390

    720

    434

    700

    430

    780

    491

    800

    470

    840

    549

    900

    510

    990

    600

    1000

    550

    1050

    655

    1200

    630

    1210

    770

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