Cryogenic Full Welded Ball Valve

Cryogenic ball valves are manufactured for extremely low temperature and cryogenic applications. Valves are designed with an integral bonnet extension which prevents cryogenic liquids from reaching the stem packing by enabling the liquids to boil and convert to gas. This minimizes the energy loss along the extension and protects the valve from malfunctioning. The structural integrity of the valve reduces any thermal deformation of internal components caused by temperature variance to a minimum, ensuring the highest level of performance for tight shut-off in critical LNG fields.

The fully welded body construction provides a lighter solution while also avoiding potential leak paths to the external environment, ensuring reliable protection of the whole system. A solid double trunnion configuration and two independent seats with bidirectional sealing ensure the greatest level of tightness and reliability under high pressure and temperature conditions in all critical isolation services. Several unique features are available offering advanced technical solutions suitable for sweet or acid gas processes or pipelines applications.

VALVE DESIGN

Based on BS 6364, MESC 77/200, ISO 28921‐1 and customer requirements

TEMPERATURE RANGE

-320 to 212°F (-196 to 120°C)

SIZE

NPS 1-30 (DN 25-750)

PRESSURE RATING

ASME 150 - ASME 900

FACE-TO-FACE

As per API 6D standard

END CONNECTIONS

RF, RTJ as per B16.5 &B16.47
BW, Butt Welded as per B16.25

MATERIALS:

Low-Temperature Carbon Steel,Stainless Steel, Duplex, Super Duplex, Inconel.

BODY DESIGN

Forged bolted two-piece and three-piece

SEAT DESIGN

Soft or metal seated with hard facing on ball and seats
Seat design to avoid trapped fluid in body cavity

FEATURES

Secondary seals in pure Graphite
Anti-static device
Anti-blowout stem
Lip seal configuration
Low fugitive emission stem packing available
Extended bonnet for low and cryogenic service

OPERATOR

Manual: wrench or gear with padlocking
Actuated: Pneumatic/ Hydraulic/Electric

TESTING & CERTIFICATIONS

Compliance with BS 6364, MESC 77/200, ISO 28921‐1 inspection and testing

Fire safe and fire tested as per API 6FA/607
SIL 3 Certification as per IEC61508
Fugitive Emission as per ISO15848
PED 2014/68/UE

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