Page 231 - Praxair - Specialty Gases and Equipment Reference Guide

Life Sciences and Healthcare

Cryopreservation

Biological materials often require cryopreservation for viable
long-term storage. Praxair offers a world-class portfolio of
cryogenic gases, equipment, and services to enable these
applications.
As a fully integrated supplier, Praxair provides cryogenic
liquid nitrogen in dewar, microbulk, and bulk scales and
can implement a complete turn-key liquid nitrogen distribu-
tion system to fit any needs. The table below lists the liquid
nitrogen products most commonly selected for cryopreser-
vation applications. NF grade liquid nitrogen products are
also available as described on page D•233.

Praxair offers a comprehensive suite of cryogenic equip-
ment, including high efficiency vapor-phase freezers;
standard liquid-phase freezers; vapor shippers; and all the
related racking systems and sample handling accessories.
Praxair’s cryorepository service goes well beyond freezer
selection and sales. Our factory-trained technicians are
also available for freezer installation, start-up, proactive
maintenance, emergency service, and repair. Proactive
maintenance helps ensure your freezer is operating correctly
and providing the right environment for your samples.
Customers also rely on Praxair for easy, cost-effective back-
up systems for mechanical, compressor-based ultra-low
temperature freezers. In the event of a freezer malfunction,
emergency cooling can be provided by a cylinder of carbon
dioxide or tank of liquid nitrogen. These cryogenic back-up
options provide a transition time for freezer repair or sample
relocation.
At Praxair, we have years of experience in designing, i
installing, and servicing cryorepositories – from a single
freezer to multiple freezer banks. Working closely with See pages E•340 - E•373 for additional information on
end users, we’ll configure a system that meets your needs Praxair’s complete line of cryogenic equipment.
today and tomorrow.
i

Liquid Nitrogen for Cryogenic Storage Praxair’s StarWatch Cryogenic
Monitoring System accurately
Product/Grade Purity Part Number Typical Cylinders O 2 H 2 O THC measures liquid level and
UHP, 5.0 99.999% NI 5.0LC 160, 180, 230 1 3 0.5
High Purity, 4.8 99.998% NI 4.8LC 160, 180, 230 5 3 – pressure in portable liquid
Concentrations given are maximum ppm by volume unless otherwise specified. containers (dewars). See page
B•87 for more details.

Life Sciences
and Healthcare
Cylinders
Cylinder Style Height Connection Typical Pressure Volume Gross
3
Type in (cm) CGA Relief Setting ft (m ) Weight
3
psig lb (kg)
160 Portable Liquid Unit 60 x 20 (152.4 x 50.8) 580 (Gas), 295 (Liquid) 22 3,519 (98) 505 (229)
180 Portable Liquid Unit 64 x 20 (162.6 x 50.8) 580 (Gas), 295 (Liquid) 22 4,099 (113) 557 (253)
230 Portable Liquid Unit 53 x 26 (134.6 x 66.0) 580 (Gas), 295 (Liquid) 22 5,023 (140) 664 (301)
Ask your Praxair sales representative about Microbulk supply systems and piping design services.

D•230 1-877-PRAXAIR www.praxairdirect.com