-65°C Deep Freezer Units

Model NMF-37: -65°C Deep Freezer Unit

Klinge Corp’s Deep Freezer Unit, Model NMF-371, maintains cargo from 0ºC to -65ºC (32ºF to -85ºF). The freezer unit is available with an integral generator set for independent operation.

Unlike other deep freezer storage containers, the NMF-371 Deep Freezer Container prevents defrost heat from entering the cargo area. More standard designs allow defrost heat to enter the container thereby heating up the cargo and at the same time reducing defrost efficiency. Klinge Corp’s unique design avoids these issues. The NMF-371 is also equipped with a hot-gas defrosting system, which is fast and efficient – even at ultra-low temperature ranges. Contact a Klinge Group Specialist Today!

Talk to a Specialist

Photo of the Deep Freezer Unit (Model NMF-371)

Deep Freezer Unit (Model NMF-371)

Applications for the Deep Freezer Unit (Model NMF-371)

Specific pharmaceuticals that our deep freezer units can accommodate include:


Vaccines play a vital role in the fight against serious afflictions such as measles, diphtheria, mumps and yellow fever. The World Health Organization (WHO) provides guidelines regarding the safe handling of vaccines. Packing vaccines in dual refrigeration systems such as the NMF-371 that also include a back-up power supply, a temperature recording system and satellite monitoring is widely regarded as a best practice when shipping vaccines overseas via ocean transport.

The NMF-371 offers a cost-effective solution for keeping vaccines at the appropriate temperature throughout the journey. Given that the number of vaccines that remain within a 15°-25°C temperature range is on the rise, the demand for these innovative deep freezer units continues to increase accordingly. Our deep freezer units are capable of maintaining temperatures between -29°C and +29°C, well within the acceptable limits for vaccines.


Biologics, which are pharmaceuticals that are extracted or partly synthesized from biological sources, must also comply with stringent shipping requirements. Our deep freezer units will ensure that biologics are kept frozen (between -20°C or -85°C) at all times. This helps to overcome the constant challenge that many end-users — typically physicians and other healthcare practitioners — face, which is receiving a shipment of biologicals that is either too warm or too cold.

The NMF-371 also enables the end-to-end visibility that is paramount during all the activities (packaging, shipping, storing, distribution and handling) that constitute the cold-chain logistical process. In addition, our deep freezer unit enables accurate temperature monitoring throughout the journey, which minimizes the risk of thawing or freezing at excessive temperatures that could ruin the entire shipment.

Blood Plasmas

Plasma is the yellowish-colored component in human blood that comprises more than one half of the body’s total blood volume and contains the blood cells. Products derived from plasma include blood coagulation factors, protease inhibitors, anticoagulants, intramuscular immunoglobins and intravenous immunoglobins. Best practices for the safe storage and handling of blood plasmas stipulate that they must be managed in a controlled fashion to ensure high product quality and the identification of errors in individual plasma units.

The NMF-371 contributes to the safe handling and storage of blood plasma products at the appropriate temperature, which can vary based on the type and composition of the material. It also meets the backup power requirements that pertain to shipping blood plasma by ocean transport.

Features of the Deep Freezer Unit (Model NMF-371)

» HIGH CAPACITY: The NMF-371 is designed to maintain frozen cargo between 32°F to -85°F (0°C to -65°C). The freezer unit is equipped with three compressors: two for the high temperature system operating on R134a, and one for the low temperature system operating on R23. The high temperature system cools the condenser for the low temperature system.
» EFFICIENT AIRFLOW: Evaporator fan motor and fan are designed to operate in constant ultra-low temperatures down to -85°F (-65°C). Standard motors will not hold up over time.
» OPTIMAL DESIGN: Maximum cargo room and front access to major service components without sacrificing reliability and performance. Innovative evaporator design completes defrost in less time than competitors while also preventing heat from entering the cargo area.
» SUPERIOR DIAGNOSTICS: Amperages and pressures are measured and can be viewed and transferred to GSM modem and transmitted via satellite

Product Specifications Available Upon Request.

Options for the Deep Freezer Unit (Model NMF-371)

» BACK-UP POWER: Integral generator set is capable of powering unit if loss of power occurs or during transport on truck.
» BLAST FREEZER KIT: Unit is capable of acting as a Blast Freezer with increased capacity until -22°F (-30°C) circulated air temperature has been reached, at which time the unit returns to its initial function as a deep freezer.
» VACUUM BUFFER TANK: The container can be equipped with a vacuum buffer tank which stores and releases preconditioned air during the unit start and stop at temperature setpoint as well as during the defrost cycle defrost. This minimizes the introduction of
moist unconditioned air into the container due to pressure differences. This reduces the number of defrosts, minimizes defrost heat removal time, and maximizes product.

Contact Klinge Corporation to Learn More About Our Deep Freezer Units

Headquartered in York, PA, Klinge Corporation has more than 40 years of expertise in the development and manufacturing of superior deep freezer units for pharmaceutical applications. Contact us to learn more about the benefits of using the NMF-371 for shipping your vaccines, biologics or blood plasma products today.

Talk to a Specialist