DN15-PN16 Close Die Forged Lift Check Valve
Description
German Standard Lift Check Valve Technical Data Sheet
A105 Material DN15 PN16 Welded Flange
1. General Information
| Item | Specification |
|---|---|
| Valve Type | Lift Check Valve |
| Design Standard | DIN 3356 |
| Nominal Size | DN15 |
| Pressure Class | PN16 |
| Structure Type | Lift Type, Bolted Bonnet |
| Connection Type | Welded Flange |
| Installation | Horizontal Piping |
| Body Material | ASTM A105 (Forged Carbon Steel) |
2. Applicable Standards
| Item | Standard Code |
|---|---|
| Design & Manufacturing | DIN 3356 |
| Face-to-Face / End-to-End | DIN 3202 |
| Flanged Connections | DIN 2543-2546 |
| Test & Inspection | DIN 3230 |
3. Main Design Features
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Operating Principle: Automatically opens and closes the disc by medium flow. When medium flows in the specified direction, disc opens under medium pressure. When backflow occurs, disc closes against seat to prevent reverse flow
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Disc Structure: Disc moves vertically along the body centerline, reliable operation, suitable for small bore applications
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Sealing Surface: Wear-resistant, corrosion-resistant, long service life
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Installation Requirement: Suitable for horizontal pipelines only, disc closes by gravity
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Body Construction: Forged steel body, dense structure, high strength, no casting defects
4. Main Component Materials
| Item | Part Name | Material | Standard/Remark |
|---|---|---|---|
| 1 | Body | ASTM A105 | Forged Carbon Steel |
| 2 | Bonnet | ASTM A105 | Forged Carbon Steel |
| 3 | Disc | 2Cr13 / A105+STL | Stainless Steel or Hardfaced |
| 4 | Seat | Integral / STL Hardfaced | Machined directly on body or hardfaced |
| 5 | Gasket | SS + Flexible Graphite | Spiral Wound |
| 6 | Stud Bolt | ASTM A193 Gr.B7 | Alloy Steel |
| 7 | Hex Nut | ASTM A194 Gr.2H | Heavy Hex Nut |
5. Technical Parameters & Dimensions
5.1 Performance Specifications
| Item | Parameter |
|---|---|
| Nominal Pressure (PN) | 1.6 MPa |
| Shell Test Pressure | 2.4 MPa |
| Seal Test Pressure | 1.76 MPa |
| Temperature Range | -20℃ ~ 350℃ |
| Applicable Media | Water, Steam, Oil, etc. |
5.2 Dimensions (DN15 PN16 Welded Flange)
| Dimension | Value | Remark |
|---|---|---|
| End-to-End Length (L) | 130 mm | Per DIN 3202 standard |
| Height (H) | Approx. 70 mm | Reference value |
| Flange Diameter (D) | 95 mm | Per DIN 2543 standard |
| Flange Sealing Face | Raised Face | Suitable for welding connection |
| Weight | Approx. 2.4 kg | Reference value, may vary by manufacturer |
5.3 End Connection Details
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Welded Flange: Flange dimensions per DIN 2543-2546, Raised Face sealing, flange to be welded to pipe
6. Test & Inspection (DIN 3230)
| Test Item | Test Pressure | Medium | Acceptance Criteria |
|---|---|---|---|
| Shell Test | 2.4 MPa | Water | No visible leakage |
| Seal Test | 1.76 MPa | Water or Air | No visible leakage |
| Test Duration | Per DIN 3230 | — | Hold time conforms to standard |
7. Marking & Supply
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Flow Direction: Clear flow direction arrow marking on body
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Valve Marking: Nameplate to include nominal size, pressure class, material, design standard, etc.
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Cleaning & Protection: Valves internally and externally cleaned, flange faces covered with protectors and coated with rust preventive
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Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment
