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High-Pressure Drying Unit BO 4/400 (UEC) SB.500

The BO 4/400 (UEC) drying unit consists of two steel cylinders filled with a mixture of zeolite and silica gel. Cylinder 1 is used for air drying, while cylinder 2 is regenerated. The drying unit also includes a final air purification filter, shut-off and control valves, and a unit for heating the air used for regeneration. Depending on the configuration, the BO 4/400 (UEC) can be equipped with a dew point sensor, an air distribution pressure gauge, a non-return valve, and a temperature controller for turning off the heating elements.
The drying unit is capable of continuous operation without stopping for regeneration. It allows you to obtain "dry" air that is free from water, oil, and mechanical impurities, with a dew point of no more than -70 degrees Celsius, a pressure of up to 400 atm, and a volume of up to 2.5 m3/minute.
Air with this degree of purification is used in the aerospace industry, in the production of products for the Ministry of Defense, and is also suitable for breathing and is used by the Ministry of Emergency Situations to refill cylinders used for breathing during emergency situations and to refill cylinders used by divers.
The BO 4/400 (UEC) drying unit is used to replace the BV-200/200-400 drying units.
The SB.500 modification includes additional protection devices against overheating of the heating elements, ONLINE Dew Point Control, Air Pressure Control at the Distribution, and a Check Valve.

Air filtration fineness, µm: max. 10

Drying type: Adsorption

Desiccant: Granulated silica gel KSM (GOST 3956-76), Zeolite NaA

Number of dryers, pcs: 2 (operating alternately)

Capacity of one dryer, l, max: 18.5

Zeolite, min: 4

Silica gel: The remainder

Regeneration duration, h: min 5

at air temp. up to 308K (+35°C): min 20

at air temp. above 308K (+35°C): min 10

Air humidity (dew point), K (°C): at P=15, not above 278 (-70)

With regeneration, min: 4±0.1 (240±6)

Operating time per dryer: 10 h

Regeneration air pressure, MPa: 1.0…1.2 (10…12)