L&T – Cryogenic Check Valves – Bolted Bonnet

Cryogenic Check Valves
Size : 2″ to 36″ (50 mm to 900 mm)
ASME Class : Class 150 to 2500
Design Standard : API 594, BS 1868, ASME B16.34, BS 6364, ISO 28921
Beyond Standards:

• Fugitive Emissions – Complies to ISO 15848-1: Endurance class CO2 and Tightness class BH
• Valves tested at -196 degree C as per BS 6364. In-house facility for valves up to 60”
• SIL3 Safety Integrity Level for Automated Valves
• Cryogenic valves successfully tested to Shell Design Validation Test Procedure 77/300 and witnessed by Shell Inspectors
• Optional tests – EN 12567 Annex A (Thermal Shock Test) and Annex B (Endurance Test)

Features that Add Value:

• Bonnet extension/ extension column keep packing rings away from cryogenic temperatures, and within its operating range
• Thermal stabilization treatment conducted on body and obturator to ensure dimensional stability and to avoid distortion during temperature cycles
• Cavity relief pressure arrangement to prevent thermal effect
• Seat and disc hardfaced to prevent seizing and galling

Versatile Solutions:

• Available in a wide grade of metallurgies for a range of low temperature applications.
• ValvTrac™ RFID tags for reliable digital traceability