Product Introduction:
H74W Wafer Single Disc Swing Check Valve .
Single disc swing type with torsion spring assisted closing, metal-to-metal hard seal.
Wafer body for sandwich installation between pipe flanges.
Stainless steel casting body, fitted with lifting ring for marine maintenance.
Automatically open by forward fluid pressure and shut off reverse flow.
Widely used for marine, offshore, water, oil and gas services.
Key Features:
1. Spring-assisted rapid closure: Short disc travel ensures a quick closing response, effectively mitigating water hammer impact and protecting pumping equipment.
2. Ultra-thin wafer design: Significantly shorter face-to-face dimension than traditional flanged check valves; lightweight, space-saving, and cost-effective to install.
3. Metal-to-metal sealing: All-metal sealing construction with no rubber components; suitable for a wide temperature range and media that would otherwise cause rubber to age or swell, such as high-temperature fluids, oils, and steam.
4. Flexible installation: Suitable for horizontal pipelines (preferred) and vertical upward-flow lines; features an unobstructed flow path with low fluid resistance, allowing the valve to open with minimal pressure differential.
5. Diverse material options: Available in carbon steel, 304, and 316L stainless steel; aluminum bronze bodies are available for seawater applications to resist chloride ion corrosion; CCS marine certification can be provided upon request.
6. Easy maintenance: Marine versions feature lifting eyes for convenient installation and removal; simple structure with fewer potential failure points.
Key Technical Parameters:
Nominal Diameter: DN50–DN1000
Nominal Pressure: PN10 / PN16 / PN25 / PN40; ASME Class 150 / Class 300
Operating Temperature: -20°C to 400°C (hard sealing is not limited by rubber constraints)
Connection Type: Wafer
Design & Manufacturing Standards: GB/T 12237, API 594; Marine version complies with CB/T 4303
Inspection & Testing: GB/T 13927, API 598
Applicable Media: Clean fluids such as fresh water, seawater, oil, compressed air, low-pressure steam, acids/alkalis, and oil/gas; suitable for media containing small amounts of fine particles.
| No. | Part Name | Common Material | Remarks |
|---|
| 1 | Valve Body | WCB / CF8(304) / CF8M(316L) / Aluminum Bronze | Wafer body, flange clamping surface |
| 2 | Disc | 304 / 316L / Aluminum Bronze | Single round disc; sealing surface machined / hardfaced |
| 3 | Lever Assembly | 304 / 316L | Hinged support for disc |
| 4 | Hinge Pin | 316L / Monel Alloy | Rotary shaft for disc; corrosion-resistant alloy for seawater service |
| 5 | Torsion Spring | 316L / Inconel | Assist quick closing, reduce water hammer |
| 6 | Lifting Ring | 304 | Standard for marine type; for hoisting & disassembly |
| 7 | Bolts & Nuts | 304 / 316L | Fasten lever and pin assembly |
All valves are equipped with professional export protective packaging.
With protective caps on the sealing surfaces, rust-proof treatment, and shock-absorbing material filling to ensure intact transport; the loading is secure and safe.
We can also customize packaging according to customer requirements.
Regarding transportation methods, we can provide appropriate transportation options based on the cargo requirements and the customer's timeliness requirements.
Common transportation methods include: sea freight, air freight, land freight, and express delivery.
