TECHNICAL DATA SHEET
Product: Lift Check Valve
Taille: 2 inch (DN50)
Classe de pression : Class 2500
Matériau du corps : Inconel 625 (UNS N06625)
End Connections: Flanged – ASME B16.5 Class 2500
Design: Lift Check (Piston Type)
- Basic Specifications
Paramètre | Value |
Taille nominale | 2″ (DN50) |
Pression nominale | Class 2500 (PN 420) |
Type de vanne | Lift Check Valve – Automatic Non‑Return |
Construction du corps | Pressure Seal Bonnet (recommended for Class 2500) |
End Connections | Flanged – ASME B16.5 Class 2500, Ring Type Joint (RTJ) facing standard |
Plage de température | –196°C ~ +650°C (depending on trim) |
Suitable Media | Sour gas, seawater, high‑pressure steam, superheated water, corrosive chemicals, acidic environments |
Flow Direction | Horizontal (preferred) or vertical with upward flow |
- Main Features
- Lift Check Design: Disc lifts vertically off the seat under forward flow and drops back when flow reverses, providing reliable backflow prevention.
- Inconel 625 Construction: Full Inconel 625 body and trim offer exceptional resistance to pitting, crevice corrosion, stress corrosion cracking, and high‑temperature oxidation. Ideal for sour service (NACE MR0175), seawater, and aggressive chemical environments.
- High‑Pressure Capability: Class 2500 rating with flanged ends suitable for ultra‑high‑pressure systems.
- Pressure Seal Bonnet: Ensures leak‑tight performance under fluctuating high temperatures and pressures.
- Renewable Seat & Disc: Seat and disc hardfaced with Stellite 21 for extended service life and ease of maintenance.
- Compact Design: Lift check valves offer a shorter face‑to‑face length compared to swing check valves.
- Material List (Specified Configuration)
Item | Part | Matériel |
1 | Corps | Inconel 625 (UNS N06625) |
2 | Bonnet | Inconel 625 (UNS N06625) |
3 | Disc (Piston) | Inconel 625 + Stellite 21 Hardfacing (seat contact surface) |
4 | Seat Ring | Inconel 625 + Stellite 21 Hardfacing |
5 | Stem / Guide | Inconel 625 |
6 | Spring (if applicable) | Inconel 718 / Inconel X‑750 |
7 | Bonnet Gasket | Spiral Wound, Inconel 625 + Graphite |
8 | Bolting | ASTM A453 Grade 660 (or Inconel 718) |
Note: Full Inconel 625 construction avoids galvanic corrosion issues common with dissimilar materials.
- Dimensions & Structural Data (Flanged Ends)
Paramètre | Value |
Face‑to‑Face Length (L) | ~305 – 340 mm (per ASME B16.10 for Class 2500 lift check) |
Flange Standard | ASME B16.5 Class 2500 |
Flange Facing | Ring Type Joint (RTJ) – standard for Class 2500 |
Flange Outside Diameter | ~235 mm (approx.) |
Bolt Circle Diameter | ~190 mm (approx.) |
Number of Bolts | 8 (studs) |
Approx. Weight | ~95 – 125 kg (flanged version) |
Bonnet Type | Pressure Seal |
Note: Final dimensions to be confirmed by manufacturing drawings.
- Design & Testing Standards
Item | Standard |
Design & Manufacture | ASME B16.34, API 6D (where applicable) |
Flanged End Connections | ASME B16.5 Class 2500 |
Pressure‑Temperature Rating | ASME B16.34 |
NACE Compliance | NACE MR0175 / ISO 15156 (for sour service) |
Pressure Testing | API 598 or ISO 5208 |
Low‑Pressure Air Test | 0.6 MPa (6 bar) – no visible leakage |
High‑Pressure Hydrostatic Test | 1.5 × rated pressure (body), 1.1 × rated pressure (seat) |
- Inconel 625 Material Advantages
Property | Benefit |
Corrosion Resistance | Excellent resistance to seawater, chlorides, sour gas (H₂S), and mineral acids |
High‑Temperature Strength | Maintains mechanical properties up to 650°C |
Oxidation Resistance | Resists scaling and oxidation in high‑temperature environments |
Fatigue Resistance | Superior resistance to thermal fatigue and cyclic loading |
- Operating Guidelines
- Orientation: Lift check valves are typically installed in horizontal pipelines with the bonnet vertical, or in vertical lines with flow upward.
- Cracking Pressure: Standard cracking pressure is typically 0.5 – 1.0 psi (0.03 – 0.07 bar). Spring‑assisted designs are available for vertical installation or low‑pressure applications.
- Flow Characteristics: Minimal pressure drop when fully open, as the disc lifts completely out of the flow path.
- Typical Applications
- Subsea & Offshore: High‑pressure subsea manifolds, Christmas trees, and topside piping in seawater service.
- Sour Service: Oil & gas production with high H₂S and CO₂ content (NACE MR0175 compliance).
- Nuclear Power: High‑temperature steam and feedwater systems.
- Chemical Processing: Corrosive chemical plants handling acids, chlorides, and high‑temperature fluids.
- Hydrogen Service: High‑pressure hydrogen systems requiring nickel alloy construction to prevent hydrogen embrittlement.
- Ordering Information
When ordering, please specify:
- Size & Pressure Class: 2″ – Class 2500
- Body Material: Inconel 625
- End Connections: Flanged (RTJ) – ASME B16.5 Class 2500
- Bonnet Type: Pressure Seal
- Optional Features: Spring‑assisted disc (for vertical or low‑pressure applications)
This data sheet reflects the flanged connection configuration. For butt weld ends or additional customizations, please contact us with your specific requirements.
GARANTIE :
SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.