DN50-PN40-RF Axial Check Valve
Description
TECHNICAL DATA SHEET
Product: DN50-PN40-RF Axial Check Valve
Document No.: TDS-CV-AX-50-40-RF-2023
Revision: 1.0
Date: [Date]
1. PRODUCT DESCRIPTION
The axial check valve (also known as axial flow check valve) is designed for minimal flow resistance and pulsation reduction. Featuring an axial flow path and spring-assisted closing mechanism, it is suitable for pipeline systems requiring low water hammer, minimal pressure drop, and tight sealing. Suitable for horizontal or vertical installation (flow direction must be observed).
2. KEY TECHNICAL PARAMETERS
| Item | Specification | Remarks |
|---|---|---|
| Nominal Diameter (DN) | 50 mm | 2 inch |
| Nominal Pressure (PN) | 40 bar | Approx. Class 300 |
| Connection Type | RF (Raised Face Flange) | Per EN 1092-1 / ASME B16.5 |
| Design Type | Axial, Spring-Assisted | Disc moves parallel to pipeline axis |
| Applicable Media | Water, Oil, Steam, Gas, etc. | Dependent on seat material |
| Media Temperature Range | -20°C ~ +200°C | High-temp version available up to +400°C |
| Body Material | Carbon Steel WCB / Stainless Steel 304 / 316 | Duplex steel etc. optional |
| Disc Material | SS 304/316 + Stellite hard-faced sealing | |
| Seat Seal | Metal Hard Seal / Soft Seal (PTFE) | Optional |
| Spring Material | SS 316 / Inconel X-750 | Selected per media temperature |
| Flange Standard | EN 1092-1 (PN40) / ASME B16.5 (Class 300) | Other standards available upon request |
| Cracking Pressure | ≤ 0.1 bar | Low differential pressure required to open |
| Full Flow Pressure Drop | ≤ 0.02 bar | Typical value, depends on flow velocity |
3. DIMENSIONS & CONNECTIONS (Typical)
| Dimension | Value (mm) |
|---|---|
| Face-to-Face Length L | Approx. 200-250 |
| Overall Height H | Approx. 150-180 |
| Flange OD D | 165 |
| Bolt Circle Diameter K | 125 |
| Bolt Holes (Number × Diameter) | 4 × φ18 |
| Flange Thickness t | Approx. 24 |
| Flange Face | RF (Raised Face) Ra≤3.2μm |
| Weight (WCB) | Approx. 12-15 kg |
4. PERFORMANCE CHARACTERISTICS
- Low Flow Resistance: Axial streamlined flow path, lower pressure drop compared to conventional swing or lift check valves.
- Rapid Closing: Spring-assisted closure minimizes reverse flow and water hammer.
- Reliable Sealing: Metal hard seal for high temperature/pressure; soft seal option for bubble-tight shut-off.
- Flexible Installation: Suitable for horizontal or vertical mounting (arrow must point upward or horizontally in flow direction).
- Easy Maintenance: Most designs allow in-line maintenance without removing from pipeline.
5. TYPICAL APPLICATIONS
- Petrochemical: Pump discharge, compressor pipelines.
- Power Industry: Feedwater systems, condensate lines.
- Water Supply: High-pressure pump discharge, network backflow prevention.
- Industrial Processes: Steam lines, cooling systems.
6. TESTING & CERTIFICATION
| Test Item | Standard | Requirement |
|---|---|---|
| Shell Strength Test | EN 12266 / API 598 | 1.5 × PN (60 bar) |
| Seat Leakage Test | EN 12266 / API 598 | 1.1 × PN (44 bar) |
| Reverse Flow Seal Test | As per customer request | Gas or liquid test available |
| Material Certificate | EN 10204 3.1 | Optional |
7. INSTALLATION & MAINTENANCE NOTES
- Verify valve flow direction arrow matches medium flow direction before installation.
- Recommended to install a strainer upstream to prevent seal damage from debris.
- For vertical installation, ensure spring is below the disc (refer to specific design drawing).
- Periodically check for smooth operation and abnormal vibration/noise.
8. ORDERING EXAMPLE
DN50-PN40-RF Axial Check Valve, Body WCB, Disc/Seat 304+Stellite, Spring 316, Metal Hard Seal, EN 1092-1 Flange.
Note: The above data represents typical design values. Actual product specifications may vary depending on specific design, material selection, or manufacturing standards. Please confirm detailed specifications with the manufacturer before ordering.
