SS Cryogenic Shut-Off Valves Used For Liquid Oxygen Nitrogen
Liquefied Natural Gas
Shut-Off Valve Product Feature
Cryogenic shut-off valves are mainly used in pipeline systems
carrying cryogenic media and in cryogenic environments. They
feature flexible switching and reliable sealing. They typically
employ a cryogenic extended shaft design to reduce cold energy
transfer and prevent icing on the valve stem from affecting
operation. The seals often utilize a soft-seal structure, making
them suitable for cryogenic media such as liquid oxygen, liquid
nitrogen, and liquefied natural gas.
Shut-Off Valve Product Parameters
| Nominal diameter: DN10-DN50 | Nominal pressure: 150LB-800LB |
| Applicable media: water, gas, oil, etc. | Applicable temperature: ≤ -40℃ |
| Valve body material: A105, alloy steel, stainless steel | Connection method: threaded connection, socket welding connection,
butt welding connection |
Shut-Off Valve Advantage
Sealing Reliability: At low temperatures, the medium is prone to
vaporization, requiring valves to have a zero-leakage seal (often
using soft seals such as PTFE modified materials or hard metal
seals) to prevent medium leakage from causing cold loss or safety
accidents.
Low-Temperature Shock Resistance: The valve material must be made
of low-temperature resistant steel (such as stainless steel 304L or
316L, or special alloys such as Monel alloy) to avoid brittleness
at low temperatures. An extended valve stem design is also used to
prevent the valve stem from freezing and affecting operation.
Operational Flexibility: At low temperatures, lubricating oil is
prone to solidification, requiring the use of low-temperature
specialized lubricants or an oil-free design to ensure smooth
operation of the valve handwheel/pneumatic/electric operation and
rapid emergency shut-off.
Shut-Off Valve Core Application Areas
1. Energy and Chemical Industry (Primary Scenarios)
Liquefied Natural Gas (LNG) Industry Chain:
Cryogenic Chemical Raw Material Processing: Industrial gases such
as liquid oxygen (-183℃), liquid nitrogen (-196℃), and liquid argon
(-186℃)
Cryogenic Chemical Reactions:
2. Aerospace and Defense Industry
Rocket Propulsion Systems:
Aerospace Testing Equipment:
3. Pharmaceutical and Food Industry
Pharmaceutical Cold Chain and Freeze-Drying Processes:
Food Freezing Processing:
4. Metallurgy and Materials Industry
Iron Smelting:
Superconducting Material Applications:
5. Refrigeration and Cryogenic Engineering
Industrial Refrigeration Systems:
Cryogenic Experimental Equipment:
Who we are
SND has been manufacturing and supplying metal products for nearly
20 years. Utilizing production methods such as sand casting, lost
wax casting, lost foam casting, and precision machining, the
company produces items made from materials like cast iron, steel,
stainless steel, aluminum, and more. The company also provides
surface finishing and assembly services.
Through years of dedicated effort, we have successfully developed
products for a wide range of industries, including automotive, rail
transportation, agricultural machinery, chemical, energy, power,
water, air compressors, and construction.
Our factories operate under ISO9001-certified quality control
systems, ensuring consistent and reliable quality for every
component. Routine production processes include inspections such as
spectrometer analysis, ultrasonic testing, magnetic testing,
permeability checks, and evaluations of elongation, tensile
strength, and yield strength.
