| Product Overview
YDZ-175 Self-pressurized Liquid Nitrogen Tank is a high-performance cryogenic storage and transport device independently developed by Zhonghuo, with an effective capacity of 175L and dimensions of 706×1260mm. The tank features a net weight of 98KG and a full weight of 238KG, working pressure ≤0.1MPa, and a daily evaporation rate of only 1.10%. It adopts a self-pressurization technology that vaporizes a small amount of liquid nitrogen inside the tank to generate pressure for automatic liquid discharge, eliminating the need for manual pouring or external pumps. Made of high-quality austenitic stainless steel, it has a high-vacuum insulation structure, ensuring excellent low-temperature preservation performance and suitable for various scenarios requiring liquid nitrogen supply and storage.
| Core Advantages
Integrated Storage & Transportation Function
The self-pressurization system enables automatic and continuous liquid nitrogen discharge, realizing single-person operation and greatly improving work efficiency. It can not only store liquid nitrogen for a long time but also serve as a mobile cold source for on-site liquid supply.
Excellent Thermal Insulation Performance
The tank adopts a double-layer stainless steel structure with a high-vacuum insulation interlayer and multi-layer insulation materials, which effectively reduces liquid nitrogen evaporation loss. The daily evaporation rate is as low as 1.10%, extending the storage duration of liquid nitrogen and reducing user operation costs.
Flexible Mobility & Diverse Models
Equipped with braking casters at the bottom, it can be easily moved in laboratories, factories, and other spaces. The product line covers capacities from 15L to over 1000L, with vertical and horizontal models available, meeting the needs of small laboratories to large-scale industrial production lines.
Intelligent Monitoring Option
It can be equipped with a liquid nitrogen tank monitoring terminal and monitoring software, realizing remote transmission of liquid level, pressure, and other data. It supports remote alarm for low liquid level and overpressure, as well as manual remote pressurization and liquid supply control, ensuring safe and intelligent operation.
| Application Fields
Biomedical Field
It is used for long-term preservation of biological samples such as vaccines, cells, bacteria, viruses, animal organs, human stem cells, and blood. The -196℃ deep low-temperature environment maintains the biological activity of samples, which can be thawed and reused when needed.
Laboratory Liquid Nitrogen Supply
As a stable cold source, it provides continuous liquid nitrogen supply for laboratory equipment such as freeze dryers, solving the problem of low efficiency of manual liquid replenishment and ensuring the stable operation of experiments.
Metal Manufacturing & Precision Machining
Liquid nitrogen from the tank is used for deep cryogenic treatment of metal materials, which can optimize the metallurgical structure of metals, significantly improve hardness, strength, and wear resistance, and facilitate interference fit assembly of precision parts.
Animal Husbandry & Breeding Industry
It is used for long-term active preservation and long-distance transportation of semen from valuable breeding stock such as cattle and sheep, as well as rare animals, providing strong technical support for artificial insemination and breed improvement programs.
| Operation & Safety Guidelines
Pre-use Inspection & Pre-cooling
Check the tank shell for dents and cracks, and ensure the vacuum exhaust port is intact and the interior is clean and dry. For new or idle tanks, inject 1/10 of the total capacity of liquid nitrogen for pre-cooling, and wait until the boiling subsides before full filling.
Personal Protective Equipment (PPE)
Wear cryogenic-resistant gloves (cotton gloves are prohibited), safety goggles or face shields, and long-sleeved lab coats with ankle-covering pants during operation. Operate in a well-ventilated area to prevent oxygen deficiency caused by nitrogen gas accumulation.
Liquid Nitrogen Filling
Use a dedicated funnel or transfer tube to inject liquid nitrogen slowly along the inner wall to avoid splashing. Do not fill beyond 80%–90% of the total capacity to leave space for liquid expansion and gas evaporation.
Sample Access & Daily Maintenance
Minimize the lid-open time to less than 30 seconds per access to reduce nitrogen loss and temperature rise. Use baskets to lift and lower samples steadily, avoiding collisions with the neck tube. Wipe the exterior with a dry soft cloth; rinse the inner liner with 40–50℃ warm water and air dry completely for long-term storage.
| Production Process
Material Selection: Select high-quality austenitic stainless steel for the inner liner and outer shell to ensure corrosion resistance and low-temperature resistance.
Tank Body Fabrication: Form the inner and outer shells through stamping and welding processes, then assemble them with multi-layer insulation materials and vacuum interlayer.
System Installation: Install self-pressurization booster coils, valves, pressure gauges, liquidometers, and other components, and debug the automatic liquid discharge function.
Vacuum Treatment: Conduct high-vacuum pumping on the interlayer to ensure excellent thermal insulation performance of the tank.
Testing & Certification: Carry out pressure testing, leakage testing, and evaporation rate testing, and issue qualified certificates after passing all tests.
| FAQ
Will the YDZ-175 liquid nitrogen tank explode?
Liquid nitrogen is non-flammable and non-explosive. However, if the tank is sealed or the pressure relief valve fails, vaporized nitrogen will expand 700 times, causing tank rupture. Always use certified tanks with functional pressure relief devices and never seal the tank mouth.
How to prevent cold burns during operation?
Wear full-set cryogenic PPE including cryogenic gloves, safety goggles, and long-sleeved lab coats. Avoid direct contact between skin and liquid nitrogen or the tank's inner wall.
What is the correct way to fill liquid nitrogen for new tanks?
Pre-cool the tank with 1/10 capacity of liquid nitrogen first, wait until the boiling stops, then fill slowly along the inner wall, and control the filling volume within 80%–90% of the total capacity.
| Call to Action
Are you in need of a high-efficiency, low-evaporation self-pressurized liquid nitrogen tank for biomedical, laboratory, or industrial use? Our YDZ-175 Liquid Nitrogen Tank has 1000 units in stock and offers reliable quality and intelligent monitoring options. Contact us now to get a detailed quotation! Call our sales hotline or click "Add to Basket" to place your order, and we will provide you with professional after-sales service!
yongy0223@gmail.com 
+86-17693104145
Lanzhou New Area, Lanzhou City, Gansu Province, on the second floor to the east of New Harbor Road, to the east of Building Materials Road No. 2, to the west of Qilian Mountain Avenue (Jingqi Road)
