Rapid economic growth in the major industrial countries has caused the demand for natural gas to increase quickly, however the supplying of natural gas must be transported from the production fields to cities and countries around the world. LNG has become the popular and economical method to transport natural gas. Sanseco cryogenic valves are widely used in LNG, Oxygen, Liquid Nitrogen and other cryogenic applications.
Features of cryogenic valve technology:
1. 1.Extended bonnet, raised back seat design
The extended bonnet design moves the valve stem packing farther away from the cold service to prevent freezing and ensure continued valve operation. Such design also makes it easy to insulate the valve to prevent the loss of cold energy. The length of the bonnet extension is designed in accordance with Shell MESC SPE 77/200 & SPE 77/209 and BS 6364 unless otherwise specified. The raised backseat positions is just below the stem packing, so when the stem is fully back seated, it will prevent abnormal pressure increases, that can occur in the cavity of the bonnet extension, from impacting the packing and potentially causing damage.
2. 2.Cryogenic treatment of main pressure-containing components
The main pressure containing components are submerged in liquid nitrogen to stabilize dimensions and eliminate stress caused by metal microstructure changes.
3. Inspection and test
Sanseco cryogenic valves can be cryogenic inspected and tested by itself in accordance with BS 6364 to certify sealing performance in cryogenic conditions when requested by customer.
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Trunnion Mounted Ball Valves by Sanseco Group
Reliable performance in Long-term operation. Tailored to your needs. Quality from a single source.
