DN8-PN40 Y Pattern Lift Check Valve
Description
Technical Data Sheet – Y Pattern Lift Check Valve
Model: DN8-PN40 Y Pattern Lift Check Valve
1. Product Description
The Y Pattern Lift Check Valve is a spring-loaded, automatic non-return valve. Its Y-shaped body provides a straight-through flow path with low pressure drop, while the lift-type disc ensures rapid, positive closing when flow reverses. Designed for DN8 and PN40 rating, it is suitable for high-pressure systems in compact piping layouts.
2. Main Technical Parameters
| Parameter | Value |
|---|---|
| Nominal Diameter (DN) | DN8 |
| Nominal Pressure (PN) | PN40 (40 bar) |
| Body Configuration | Y Pattern |
| Valve Type | Lift Check (Spring-loaded) |
| Applicable Media | Water, oil, gas, non-corrosive or mildly corrosive media |
| Temperature Range | -20°C to +180°C (depending on sealing material) |
| End Connections | Threaded / Socket Weld / Butt Weld (optional) |
| Flow Direction | Unidirectional, arrow marked on body |
3. Main Component Materials (Standard Configuration)
| Component | Material |
|---|---|
| Body | Stainless Steel 1.4408 / CF8M or Carbon Steel 1.0619 / WCB |
| Bonnet | Same as body |
| Disc | Stainless Steel 1.4404 / 304 / 316 |
| Seating Surface | Stellite overlay or stainless steel to stainless steel |
| Spring | Stainless Steel 1.4310 / 304 |
| Gasket | Flexible graphite + stainless steel spiral wound |
| Threads | ISO 228 / BSPT / NPT |
4. Dimensions & Weight (Reference)
| DN | Length L (mm) | Height H (mm) | Thread Size | Weight (kg) |
|---|---|---|---|---|
| DN8 | 65 | 70 | 1/4″ | 0.5 |
Note: Dimensions are for reference and may vary slightly depending on end connection type. Refer to the final drawing for exact values.
5. Features & Benefits
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Y‑Pattern Flow Path – Low flow resistance and high flow capacity.
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Lift Check Design – Spring-assisted disc ensures rapid, chatter-free closing upon flow reversal.
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High‑Pressure Capability – PN40 rating suitable for steam, high-pressure water, and hydraulic systems.
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Compact Installation – Can be installed horizontally or vertically (spring‑loaded version).
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Reliable Sealing – Metal-to-metal or soft seat options available; long service life.
6. Applicable Standards
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Design & Manufacture: API 602 / BS 5352 / Company Standard
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Pressure Testing: ISO 5208 / API 598
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Threaded Ends: ISO 7-1 / ASME B1.20.1
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Socket Weld Ends: ASME B16.11
7. Typical Applications
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Steam and condensate systems
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High-pressure gas pipelines
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Hydraulic and lubrication systems
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Chemical and petrochemical auxiliary lines
-
Boiler feedwater systems
8. Important Notes
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Ensure the flow direction arrow on the body matches the actual media flow.
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For systems with solid particles, install a strainer upstream.
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Do not exceed the rated pressure and temperature limits.
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Stainless steel body is recommended for corrosive media; carbon steel body for neutral media, oil, and water.
