Wholesale API Standard Stainless Steel Swing Check Valve Supplier, Manufacturer

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.

Product Description

Product Specifications
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
Main Advantages
  • 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.
  • 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.
  • Reliable sealing, suitable for multiple media: The metal hard seal and soft seal can be flexibly switched. Metal seals withstand high temperature, high pressure, and erosion; Soft sealing achieves zero leakage under low pressure, suitable for water, steam, oil, and chemical raw materials.
Advantages
Material Selection
Product Type Part Name
Valve Body/Bonnet Valve Disc/Seat Gasket Fastener
H44HY WCB/25 Chromium stainless steel / Carbide Flexible graphite with stainless steel / Spiral wound gasket High quality carbon steel
H44Y Chromium-molybdenum steel Chrome molybdenum steel + Carbide Alloy steel
H44W Chrome-nickel titanium / chromium-nickel-molybdenum Stainless steel
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 corrosive substances, high-temperature and high-pressure media, and high-purity fluid systems.

Application 1
Application 2
Application 3
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Packing & Logistics

Standard export wooden case packaging ensures the integrity of the valve during international shipping and handling.

Standard export wooden case packaging
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Technical Dimensions
dimension chart
PN (MPa) DN (mm) L H D D1 D2 b Z-Φ d
1.6 50 230 135 160 125 100 16 4-Φ18
1.6 100 350 180 215 180 155 20 8-Φ18
1.6 200 550 304 335 295 265 26 12-Φ23
2.5 50 230 160 160 125 100 20 4-Φ18
2.5 150 480 270 300 250 218 30 8-Φ25
Frequently Asked Questions
What media can this swing check valve handle?
The valve is suitable for a wide variety of media, including water, steam, oil, chemical raw materials, and corrosive substances, depending on the material selection.
How does the integrated casting process benefit the valve?
It ensures a smooth inner wall without dead corners, which significantly reduces flow resistance and prevents medium accumulation.
What is the difference between soft and metal sealing?
Metal hard seals are designed for high temperature, high pressure, and abrasive media, while soft seals achieve zero leakage under lower pressure conditions.
Can the connection interface be customized?
Yes, we offer both flange connection and clamp connection interfaces customized to meet your specific pipeline installation requirements.
Does this valve prevent water hammer effectively?
Yes, the smooth rotary trajectory and optional damping devices or balance hammers allow the valve to close slowly, effectively weakening the water hammer effect.
What is the maximum operating temperature?
The valve is designed to operate in extreme conditions, with a temperature range from -40°C up to 800°C.

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