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API Standard Stainless Steel Swing Check Valve
Flange Type

API Standard Stainless Steel Swing Check Valve

Type: Swing type

Series: H44W-150LB

Size: DN40-DN700/2”-28”

Pressure rating: 150LB/300LB

Design standard: API609

Service: OEM&ODM

The stainless steel swing check valve is an automatic anti-backflow valve constructed primarily from stainless steel and featuring a swinging disc design. It opens as the disc is pushed by forward medium flow, and closes via reverse medium pressure combined with the disc’s own weight, no external actuation required.

    Valve Type:

    Swing check valve

    Structure:

    Swing type

    Standard:

    API609

    Workmanship:

    Investment casting

    Sealing direction:

    Single-directional

    Sealing grade:

    Zero leakage

    Temperature:

    -40°C<T<800°C

    Operation:

    Self-starting

    Characteristics

    Adopting an integrated casting process, the flow channel is designed as a straight through or angular type, and the inner wall is precision polished to be smooth without dead corners, reducing the flow resistance of the medium; Both flange connection and clamp connection interfaces can be customized to meet different pipeline installation requirements.

    Characteristics

    Advantages

    1. Smooth opening and closing, good resistance to water hammer

    The rotary motion trajectory of the valve disc is smooth, with no impact when opened. When closed, it slowly resets with the help of the reverse pressure of the medium. Paired with a balance hammer or damping device, it can further slow down the closing speed, effectively weaken the water hammer effect, and protect the pipeline and upstream and downstream equipment.

    2. Strong circulation capacity and minimal pressure loss

    The straight through flow channel design reduces turbulent losses in medium flow. When the valve disc is fully opened, it is parallel to the axis of the flow channel and produces almost no additional resistance. It is particularly suitable for conveying large-diameter and high velocity media, reducing the operating energy consumption of power equipment such as pump sets.

    3. Reliable sealing, suitable for multiple media working conditions

    The metal hard seal and soft seal can be flexibly switched, and the metal seal can withstand high temperature, high pressure, and particle media erosion; Soft sealing can achieve zero leakage sealing under low pressure conditions, suitable for various media such as water, steam, oil, chemical raw materials, etc.

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    Packing

    Standard export wooden case packaging

    Standard export wooden case packaging

    Application Scenarios

    This valve sees extensive utilization in pipeline networks spanning diverse industries, ranging from chemical manufacturing, petroleum refining and marine engineering to pharmaceuticals, food and beverage production, power generation and water treatment. It demonstrates exceptional suitability for applications involving the conveyance of corrosive substances, high-temperature and high-pressure media, as well as high-purity fluid typical use cases include chemical raw material transfer pipelines, boiler steam pipelines, seawater desalination systems and pharmaceutical process piping.

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    Material

    Product Type

    Part name

    Valve body, valve bonnet

    Valve disc, valve seat

    Gasket

    Fastener

    H44HY WCB/25 H:25+ Chromium stainless steel Y:25+Carbide Stainless steel with flexible graphite The steel strip Asbestos-wound gasket Spiral wound gasket High quality carbon steel
    H44Y Chromium-molybdenum steel Chrome molybdenum steel + Carbide Alloy steel
    H44W Chrome-nickel titanium, chromium-nickel-molybdenum and titanium stainless steel Stainless steel
    H44W

    Dimension

    dimension

    PN (MPa)

    DN (mm)

    L

    H

    D

    D1

    D2

    D6

    b

    f

    f2

    Z- ϕ d

    1.6 50 230 135 160 125 100 16 3 4- Φ18
      65 290 142 180 145 120 18 3 4- Φ18
      80 310 165 195 160 135 20 3 8- Φ18
      100 350 180 215 180 155 20 3 8- Φ18
      125 400 210 245 210 185 22 3 8- Φ18
      150 480 233 280 240 210 24 3 8- Φ23
      200 550 304 335 295 265 26 3 12- Φ23
      250 650 348 405 355 320 30 3 12- Φ25
      300 750 390 460 410 375 30 4 12- Φ25
      350 850 430 520 470 435 34 4 16- Φ25
      400 950 468 580 525 485 36 4 16- Φ30
      450 1050 490 640 585 545 40 4 20- Φ30
      500 1150 525 705 650 608 44 4 20- Φ34
      600 1350 610 840 770 718 48 4 20- Φ41
      700 1450 670 910 840 788 50 4 24- Φ41
      800 1650 730 1020 950 898 52 4 24- Φ41
      900 1950 795 1120 1050 998 54 4 28- Φ41
    2.5 50 230 160 160 125 100 20 3 4- Φ18
      65 290 175 180 145 120 22 3 8- Φ18
      80 310 185 195 160 135 22 3 8- Φ18
      100 350 220 230 190 160 24 3 8- Φ23
      125 400 248 270 220 188 28 3 8- Φ25
      150 480 270 300 250 218 30 3 8- Φ25
      200 550 350 360 310 278 34 3 12- Φ25
      250 650 410 425 370 332 36 3 12- Φ30
      300 750 430 485 430 390 40 4 16- Φ30
      350 850 518 550 490 448 44 4 16- Φ34
      400 950 560 610 550 505 48 4 16- Φ34
      450 1050 590 660 600 555 50 4 20- Φ34
      500 1150 618 730 660 610 52 4 20- Φ41
      600 1350 640 840 770 718 56 4 20- Φ41
      700 1450 695 955 875 815 60 4 24- Φ48
      800 1650 760 1070 990 930 64 4 24- Φ48
      900 1956 833 1180 1090 1025 66 4 28- Φ54

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