Cryogenic Vacuum Insulated Liquid Nitrogen Dewar Cylinder
Welding thermal insulation cylinder, commonly known as dewar is
liquefied natural gas (LNG), liquid oxygen, vehicle of natural gas,
cryogenic liquid storage devices, widely used in the production of
liquefied gas storage, transportation, use, and other fields, is
particularly important for cylinder sealing, any leak can lead to
the loss of the gas, if the bearing is gas or flammable gases,
There is a risk of explosion, so leak detection for dewar (welded
insulated gas cylinders) is very necessary.
|TP type||Low||High||Super high||Low||High|
|Safety P||1.59 Mpa||2.41 Mpa||3.2 Mpa||1.59 Mpa||2.4Mpa|
|Rupture disk||2.6 Mpa||3.6 Mpa||4.6 Mpa||2.6 Mpa||3.6Mpa|
|Booster valve||0.86 Mpa||2.07 Mpa||2.93Mpa||0.86 Mpa||2.0Mpa|
|LN2||175L: 120kg 195L: 135kg||365kg||365kg|
|LO2||175L: 170kg 195L: 195kg||500kg||500kg|
|LAr||175L: 230kg 195L: 260kg||630kg||630kg|
|CO2||175L: 170kg 195L: 190kg||450kg||450kg|
|LNG||175L: 72kg 195L: 80kg||200kg||200kg|
Matters needing attention
1. During transmission, a special delivery hose is needed to
connect the cylinder in and out of the liquid valve (DPW cylinder
is the liquid inlet valve) with the supply source, and tighten to
ensure no leakage of dewar bottle.
2. Open the discharge valve and inlet and outlet valve of the
low-temperature dewar bottle, and then open the supply valve to
3. During the filling process, the pressure in the bottle is
monitored by the pressure gauge and the discharge valve is adjusted
to keep the pressure at 0.07~ 0.1mpa (10~15 psi).
4. Close the inlet and outlet valve, discharge valve and supply
valve when the required filling quality is reached.
5. Remove the conveying hose and remove the low-temperature dewar