Self-Increasing Pressure Liquid Nitrogen Tank Various Models Ydz Series

The standard working pressure for YDZ tanks is about 0.05 MPa (approximately 0.5 bar or 7 psi). The maximum allowable working pressure is 0.09 MPa (0.9 bar). The primary safety relief valve is set to open at 0.099 MPa to prevent exceeding this limit, and a secondary relief (or burst disc) is set around 0.15 MPa as an additional safeguard. The tank should never be intentionally pressurized above its rated maximum working pressure.

YDZ tanks 100 L and larger come with a built-in float-type liquid level gauge that shows the approximate volume of LN2 remaining. For smaller models without a gauge, you can measure the level by using a calibrated dipstick designed for cryogenic use, or by timing the fill from an empty state (knowing the filling rate and time). Avoid using improvised methods (like inserting a regular stick) as they can be dangerous. LDH also offers optional digital level indicators that can provide a remote read

Yes, the YDZ tanks are designed for short-distance transport on their casters. They are often used to move LN2 around a facility or to a nearby location. However, for longer-distance transport (e.g. in a vehicle), you should secure the tank upright and relieve the internal pressure first (to prevent pressure buildup during transit). Do not lay the tank on its side when it contains LN2, as this can lead to valve leakage or damage. Also, ensure proper ventilation if transporting in an enclosed veh

The static evaporation rate (when the tank is not being used or opened) is very low. For example, a 100 L YDZ tank evaporates about 1.3 L of LN2 per day, which is roughly 1.3% of capacity per day. A 50 L tank evaporates about 1.0 L/day (2% per day). These rates mean that a full tank can hold LN2 for many days without refilling under idle conditions. Actual hold time will vary with usage (opening the tank, dispensing LN2, etc.) and ambient conditions. LDH provides the static evaporation rate for

To refill, you will need a source of liquid nitrogen (such as a larger supply Dewar, a bulk tank, or delivery cylinder). Connect a cryogenic transfer hose from the LN2 source to the YDZ tank's fill port. Open the fill valve and slowly fill the YDZ tank. Stop filling when liquid nitrogen reaches the fill level indicator or the bottom of the neck (do not overfill). Then close the fill valve and disconnect the hose. It's recommended to wear PPE and follow the filling procedure in the manual to avoi