Cryogenic Lift Check Valve
Description
Cryogenic Lift Check Valve – Technical Datasheet
1. Product Overview
This product is a high-pressure, cryogenic lift check valve designed for preventing backflow in ultra-low temperature and high-pressure pipeline systems. As shown in the images, it features a robust stainless steel (F304) construction with a square body and a bolted bonnet design (8 bolts). The tapered ends are designed for welding, ensuring a leak-proof connection in demanding environments. It is widely used in industries such as LNG (Liquefied Natural Gas), liquid oxygen, liquid nitrogen, and petrochemical processing.
2. Technical Specifications (Nameplate Data)
Brand: SAVVY | Model: NY24AT16
| Parameter | Specification |
|---|---|
| Product Name | Cryogenic Lift Check Valve |
| Brand | SAVVY |
| Model Number | NY24AT16 |
| Nominal Diameter (DN) | DN15 (1/2″) |
| Nominal Pressure (PN) | PN260 (High Pressure / Class 1500+) | Body Material | F304 (ASTM A182 F304 Stainless Steel) | Connection Type | Welded Ends (Tapered / Socket Weld or Butt Weld) | Operation Type | Automatic (Lift Check mechanism, prevents backflow) | Applicable Temperature | -196°C ~ +80°C (Cryogenic service) | Applicable Medium | LNG, Liquid Oxygen, Liquid Nitrogen, Liquid Argon, Cryogenic fluids | Leakage Class | Zero Leakage (Metal-to-Metal or Soft Seat depending on internals) |
3. Material of Main Parts (Standard for Cryogenic F304)
| Part Name | Material Specification |
|---|---|
| Body | ASTM A182 F304 (Stainless Steel) |
| Bonnet | ASTM A182 F304 (Stainless Steel), Bolted Connection (8 Bolts) |
| Disc / Lift Plug | F304 / F316 Stainless Steel (Cryogenically treated) |
| Seat | Metal-to-Metal / PTFE / PCTFE (Kel-F) |
| Spring (if applicable) | Stainless Steel (SS304/SS316) |
| Gasket | Spiral Wound Gasket (SWG) or Metal Ring Joint |
| Bolts & Nuts | A193 B8 / A194 8 (Stainless Steel) |
4. Applicable Standards
| Standard Type | Reference Standard |
|---|---|
| Design & Manufacture | API 602 / ASME B16.34 / BS 6364 (Cryogenic Valves) |
| Pressure-Temperature Rating | ASME B16.34 |
| Welding End Dimensions | ASME B16.25 / ASME B16.11 |
| Pressure Test | API 598 / ISO 5208 |
| Cryogenic Testing | BS 6364 / ISO 28921 (Low-temperature impact testing) |
5. Key Features
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Cryogenic Reliability: Specifically manufactured from F304 stainless steel and subjected to cryogenic treatment, ensuring structural integrity and sealing performance at temperatures as low as -196°C.
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High-Pressure Capability (PN260): The robust square body design and 8-bolt bonnet withstand extreme pressures up to PN260, making it suitable for high-pressure LNG and industrial gas systems.
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Lift Check Mechanism: The lift-type disc provides quick and sensitive response to flow reversal, effectively preventing water hammer and ensuring zero backflow.
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Extended Bonnet Available (Optional): While the image shows a standard bonnet, this design is often adapted with an extended bonnet to keep the packing/stem seal away from the cryogenic fluid, preventing frost buildup and ensuring operator safety.
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Welded Connection: The tapered ends facilitate secure butt or socket welding, eliminating potential leak paths common in threaded or flanged connections under thermal cycling.
