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  • Model 7400 In-Line Pressure/Vacuum Valve
Model 7400 In-Line Pressure/Vacuum Valve
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  • Product Details

  • Operating principle:

    Under normal operating conditions, both the exhaust and intake valve disc assemblies remain closed to seal the steam. When internal tank pressure increases, the exhaust valve disc opens to release steam into a designated recovery pipeline or recovery tank, relieving the pressure. Conversely, when the tank experiences vacuum accumulation, the intake valve disc opens to release the vacuum.

    Applications:

    • Large oil depot storage and transportation centers
    • Chemical plant liquid raw material storage areas
    • Large-scale gas storage facilities
    • Gas cabinets
    • Distillation units
    • Low-pressure gas pipeline systems
    • Port terminal storage and transportation systems

    Construction Materials

    Components

    Materials

    Other Materials

    Housing

    Corrosion-resistanthigh-strength non-metal

    Aluminum alloy

    Carbon steel

    304 stainless steel

    316L stainless steel

    Hastelloy alloy

    Valve Disc/Base

    Hastelloy alloy

    304 stainless steel

    316L stainless steel

    Hastelloy alloy

    (customizable upon customer request)

    Valve Diaphragm

    FEPTeflon

    Nitrile rubber

    Fluorocarbon rubber

    Counterweight and Spring

    Lead

    Galvanized carbon steel

    Austenitic stainless steel

    Coated steel counterweights

    Hastelloy alloy

    Note 1: Replacement and maintenance of the valve disc, counterweight, and spring should be carried out by personnel dispatched by the manufacturer or under remote guidance from the manufacturer.

    Valve Installation Range

    Model

    Inlet Connection Size

    mm/in.

    Outlet Connection Size

    mm/in.

    Pressure

    kPa(G)

    Vacuum

    kPa(G)

    Model 7410

    Counterweight-loaded

    DN50~DN300/（2"~12"）

    DN50~DN300/（2"~12"）

    0.2~6.9

    -0.2~-4.3

    Model 7420
    Vacuum spring-loaded

    DN50~DN300/（2"~12"）

    DN50~DN300/（2"~12"）

    0.2~6.9

    -4.3~-82

    Model 7430

    High pressure spring-loaded

    DN50~DN300/（2"~12"）

    DN50~DN300/（2"~12"）

    6.9~103.4

    -0.2~-4.3

    Model 7440

    High performance spring-loaded

    DN50~DN300/（2"~12"）

    DN50~DN300/（2"~12"）

    6.9~103.4

    -4.3~-82

     

    7400 Series Model 7410/7420/7430/7440 In-Line Pressure/Vacuum Valve Size Chart

    Model

    Size

    Dimensions

    Connection Bolts

    Inlet Connection Size

    in.(mm)

    Outlet Connection Size

    in.(mm)

    Total Height

    H(mm)

    Total Width

    W(mm)

    Center Width

    W1(mm)

    Hole

    QTY

    Thread

    Type

    7410

    /

    7420

    /

    7430

    /

    7440

    2"×2"

    2"(DN50)

    2"(DN50)

    343/350

    396

    256

    4

    M16

    2"×3"

    2"(DN50)

    3"(DN80)

    352/400

    403

    263

    4

    M16

    3"×3"

    3"(DN80)

    3"(DN80)

    352/440

    416

    272

    4

    M16

    3"×4"

    3"(DN80)

    4"(DN100)

    380/440

    489

    330

    4

    M16

    4"×4"

    4"(DN100)

    4"(DN100)

    460/515

    524

    364

    8

    M16

    4"×6"

    4"(DN100)

    6"(DN150)

    460/515

    558

    276

    8

    M16

    6"×6"

    6"(DN150)

    6"(DN150)

    505/555

    560

    280

    8

    M20

    6"×8"

    6"(DN150)

    8"(DN200)

    505/555

    582

    327

    8

    M20

    8"×8"

    8"(DN200)

    8"(DN200)

    690/740

    844

    381

    8

    M20

    8"×10"

    8"(DN200)

    10"(DN250)

    690/740

    856

    388

    8

    M20

    10"×10"

    10"(DN250)

    10"(DN250)

    715/775

    897

    393

    12

    M24

    10"×12"

    10"(DN250)

    12"(DN300)

    715/775

    915

    402

    12

    M24

    12"×12"

    12"(DN300)

    12"(DN300)

    735/805

    946

    416

    12

    M24

    12"×14"

    12"(DN300)

    14"(DN350)

    735/805

    975

    560

    12

    M24

    ※ The actual product dimensions may vary from those listed in the table above. The allowable tolerance is ±1" (25mm). For products with dimensions beyond those listed in the table, please contact the manufacturer for further assistance.

Product application field

Pharmaceuticals

Metallurgy

Food Processing

Petrochemical

Coal Energy

Environmental Protection

Chemical

Electricity

Related Products

Our advantage

Trusted Partner

The company's business also covers the third-level professional contracting of construction mechanical and electrical installation engineering, which can provide customers with one-stop service for product development and design, manufacturing, installation and construction, and after-sales guidance.

Perfect quality system

The company has established a perfect quality management system in strict accordance with domestic and foreign industry standards. China Taian Branch cooperates closely with universities and research institutes to jointly promote technological innovation.

24-hour professional service

With professional after-sales and sincere service as the criterion, 24 hours a day, all year round to provide customers with better quality and more professional service.

Model 7400 In-Line Pressure/Vacuum Valve

The Model 7400 end-of-line pressure/vacuum valve is normally installed parallel to the top of the storage tank to prevent excessive accumulation of positive pressure or vacuum within the system, maintaining the system’s pressure within a safe operating range. When the tank pressure increases due to filling or temperature increase, steam (often flammable, toxic, or non-compliant with comprehensive atmospheric emission standards) is discharged into a designated recovery pipeline or recovery tank. Conversely, when the tank experiences vacuum due to draining or temperature decrease, the external air forces the valve disc open to enter the tank, preventing collapse.

Parameter characteristics

Applicable sizes: 2" (DN50) to 12" (DN300)

Precision sliding rail design ensures timely valve disc opening and reduces wear

Use of advanced high-performance special materials for key components

Precision spring-loaded components

Valve disc and base are calibrated according to API 2000 standards for optimal performance

Advanced testing platform provides reliable flow rate curves and leakage detection reports

Modular valve body components design for easy and simple maintenance

FEP coating

Optional design for intake (vacuum) port connection

Optional design for enlarging the exhaust port size

Keywords

Product Query

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