2"-2500LB Inconel 625 Lift Check Valve
2"-2500LB Inconel 625 Lift Check Valve - Image 2
2"-2500LB Inconel 625 Lift Check Valve - Image 3
2"-2500LB Inconel 625 Lift Check Valve - Image 4

2″-2500LB Inconel 625 Lift Check Valve

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Description

TECHNICAL DATA SHEET

Product: Lift Check Valve
Size: 2 inch (DN50)
Pressure Class: Class 2500
Body Material: Inconel 625 (UNS N06625)
End Connections: Flanged – ASME B16.5 Class 2500
Design: Lift Check (Piston Type)

1. Basic Specifications

Parameter Value
Nominal Size 2″ (DN50)
Pressure Rating Class 2500 (PN 420)
Valve Type Lift Check Valve – Automatic Non‑Return
Body Construction Pressure Seal Bonnet (recommended for Class 2500)
End Connections Flanged – ASME B16.5 Class 2500, Ring Type Joint (RTJ) facing standard
Temperature Range –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

2. 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.

3. Material List (Specified Configuration)

Item Part Material
1 Body 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.

4. Dimensions & Structural Data (Flanged Ends)

Parameter 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.

5. 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)

6. 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

7. 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.

8. 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.

9. 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.

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