Import Bahamas Laboratory Dewar Flask Kgsq — Buy in Bulk from Supplier in China

The KGSQ liquid nitrogen sample storage tank from Henan Tianzhidao Biological Technology Co., Ltd. is a vacuum-insulated cryogenic Dewar vessel designed for biological sample preservation at -196 degrees Celsius. The flask employs a double-walled construction with an evacuated interspace (vacuum liner) that minimises conductive and convective heat transfer, with liquid nitrogen as the cryogen. A fibreglass neck tube maintains structural integrity while limiting thermal conduction along the access path. The unit is operated with a freezing rack for organised sample retrieval, and liquid level is monitored using a simple wooden ruler insertion method.

Dewar flasks of this category typically achieve static holding times from several days to several weeks depending on neck diameter, vessel volume, and ambient temperature. The vacuum integrity is protected by a vacuum exhaust port that must remain undamaged; any dent or breach compromises the insulating vacuum and causes rapid nitrogen boil-off. Standard construction materials include aluminium alloy or stainless steel for the outer shell and inner vessel, with multi-layer insulation (MLI) in the vacuum space of higher-specification units. The KGSQ designation appears to be a Henan Tianzhidao product series identifier rather than an industry-standard model code.

This equipment is purchased by biomedical research institutions, pharmaceutical manufacturers, assisted reproductive technology clinics, and agricultural germplasm repositories requiring stable ultra-low temperature storage. Buyers must confirm the nominal capacity in litres, static evaporation rate (litres per day), neck diameter, and compatible freezing rack dimensions. The supplier should provide specifications on empty weight, full weight, and whether the unit carries CE marking or compliance with Chinese national standard GB/T 5458 for liquid nitrogen biological containers.

Henan Tianzhidao Biological Technology Co., Ltd. is located in the High-Tech Industrial Development Zone of Zhengzhou, Henan Province, China, with a registered address at 289 West Third Ring Road, Building 11, 1305. Zhengzhou is a major logistics and manufacturing hub in central China with established pharmaceutical and biotechnology industrial clusters. The supplier holds a harbor trust tier. Response metrics show 0.00 percent response rate and zero recorded average response hours, indicating no recent buyer interaction data is available.

The company positions itself as a manufacturer of KGSQ liquid nitrogen tanks, though the listing does not state factory floor area, production capacity, number of employees, year of establishment, or export licence details. No certifications such as ISO 13485 (medical devices), ISO 9001, or CE marking for pressure equipment are mentioned in the source data. The supplier's description focuses heavily on safe operating procedures rather than product specifications, which suggests buyers must actively request technical datasheets and compliance documentation rather than relying on the listing alone.