CF8 Spring-Assisted Lift Check Valve – Cryogenic Service
Description
CF8 Spring-Assisted Lift Check Valve – Cryogenic Service
Stemless Design · Multi-Orientation Installation
| Parameter | Specification | Key Features |
|---|---|---|
| Valve Type | Vertical Lift Check Valve | ✅ True Lift Disc Movement |
| Actuation | Spring-Assisted Closure | ✅ No Stem · No External Leak Path |
| Installation | Horizontal/Vertical/Inclined | 360° Orientation Freedom |
| Size | 1/2″ (DN 15) | Full Bore Design |
| Pressure Class | 2500 LB | ASME B16.34 Class 2500 |
| End Connection | Buttweld (BW) | ASME B16.25 Bevels |
| Body Material | ASTM A351 CF8 (304 SS) | Cryo-Treated (-196°C Stable) |
| Critical Components | ||
| – Lift Disc | CF8 + Stellite 6 Hardfaced | Laser-Clad Sealing Surface |
| – Guide Sleeve | Self-Lubricating Rulon® AR | Anti-Galling at Cryo Temp |
| – Spring | Inconel X750 Disc Spring Stack | Preload Calibrated for 2500LB |
Cryogenic Performance Innovations
| Challenge | Engineering Solution | Verification |
|---|---|---|
| Stem Elimination | Integrated Disc-Guide System | MSS SP-134 Type Testing |
| Spring Reliability | Triple Redundant Spring Cartridge | 10,000 Cycles @ -196°C (MIL-STD) |
| Friction Control | PTFE-Impregnated Bronze Guide Channels | Coefficient of Friction <0.05 |
| Thermal Locking | Precision Disc-to-Bore Clearance 0.1mm | LN2 Thermal Shock Test Passed |