Technical Data Sheet – Y Pattern Lift Check Valve
Model: DN8-PN40 Y Pattern Lift Check Valve
- 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.
- Main Technical Parameters
Parameter | Value |
Nenndurchmesser (DN) | DN8 |
Nominal Pressure (PN) | PN40 (40 bar) |
Body Configuration | Y Pattern |
Ventiltyp | Lift Check (Spring-loaded) |
Applicable Media | Water, oil, gas, non-corrosive or mildly corrosive media |
Temperaturbereich | -20°C to +180°C (depending on sealing material) |
End Connections | Threaded / Socket Weld / Butt Weld (optional) |
Flow Direction | Unidirectional, arrow marked on body |
- Main Component Materials (Standard Configuration)
Component | Material |
Körper | Stainless Steel 1.4408 / CF8M or Carbon Steel 1.0619 / WCB |
Bonnet | Same as body |
Scheibe | Stainless Steel 1.4404 / 304 / 316 |
Seating Surface | Stellite overlay or stainless steel to stainless steel |
Frühling | Stainless Steel 1.4310 / 304 |
Gasket | Flexible graphite + stainless steel spiral wound |
Threads | ISO 228 / BSPT / NPT |
- 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.
- Features & Benefits
- Y‑Pattern Flow Path – Low flow resistance and high flow capacity.
- Lift Check Design – Spring-assisted disc ensures rapid, chatter-free closing upon flow reversal.
- High‑Pressure Capability – PN40 rating suitable for steam, high-pressure water, and hydraulic systems.
- Compact Installation – Can be installed horizontally or vertically (spring‑loaded version).
- Reliable Sealing – Metal-to-metal or soft seat options available; long service life.
- Applicable Standards
- Design & Manufacture: API 602 / BS 5352 / Company Standard
- Pressure Testing: ISO 5208 / API 598
- Threaded Ends: ISO 7-1 / ASME B1.20.1
- Socket Weld Ends: ASME B16.11
- Typical Applications
- Steam and condensate systems
- High-pressure gas pipelines
- Hydraulic and lubrication systems
- Chemical and petrochemical auxiliary lines
- Boiler feedwater systems
- Important Notes
- Ensure the flow direction arrow on the body matches the actual media flow.
- For systems with solid particles, install a strainer upstream.
- Do not exceed the rated pressure and temperature limits.
- Stainless steel body is recommended for corrosive media; carbon steel body for neutral media, oil, and water.
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