Beko BUDL 700 Specifications download pdf (Page 25)

Technical description

DRYPOINT

RS 15 – 1700 HP50 NA 25

5.9. Filter Drier

Traces of humidity and slag can accumulate inside the refrigerating circuit. Long periods of use can also produce

sludge. This can limit the lubrication efficiency of the compressor and clog the expansion valve or capillary tube. The

function of the Filter Drier, located before the capillary tubing, is to eliminate any impurities from circulating through the

system.

5.10. Capillary Tube

It consists of a piece of reduced cross section copper tubing located between the condenser and the evaporator, acting

as a metering device to reduce the pressure of the refrigerant. Reduction of pressure is a design function to achieve

optimum temperature reached within the evaporator: the smaller the capillary tube outlet pressure, the lower the

evaporation temperature.

The length and interior diameter of the capillary tubing is accurately sized to establish the performance of the dryer; no

maintenance or adjustment is necessary.

5.11. Air-to-air heat exchanger

The purpose of this exchanger is to drop the heat of the incoming compressed air onto the outgoing cold air. The

benefits of this solution are essentially two: the incoming air is already partially cooled so the refrigerating circuit can be

sized as to assure a limited thermal head, with a 40÷50% energy saving. Secondly no cold air is allowed into the

compressed air line, thus preventing the formation of condensate on the external surface of the system’s tubes.

5.12. Evaporator

Also called an air-refrigerant exchanger. The liquid formed in the condenser is evaporated in this part of the circuit. In

the evaporation phase the refrigerator tends to absorb the heat from the compressed air present in the other side of the

exchanger.

Refrigerant and air are in counter flow, thus contributing to limit pressure drop and to provide efficient thermal

exchange.

5.13. Condensate separator

The cold air exiting the evaporator goes through the hi-efficiency condensate separator featuring a stainless steel mesh.

As the condensate transported by the air gets in contact with the mesh net it is separated and expelled by means of the

draining device. The resulting cold and dry air is then conveyed into the dryer outlet.

The mesh type mist separator offers the benefit to be highly efficient even with variable flow rates.

5.14. Refrigerant relief valve

When, due to any kind of fault or malfunctioning, the pressure of the refrigerating gas circuit is higher than the nominal

conditions, the P

pressure switch will stop the refrigerating compressor.

A safety valve that requires no adjustment, has been installed as a further safety device, also to prevent the problems

caused by over-pressures of the refrigerating gas. The purpose of this valve is to release the over-pressures inside the

circuit. After this gas leak, the dryer is no longer capable of operating correctly. An extraordinary maintenance

intervention is needed to check and especially eliminate the cause that generated the over-pressure, in addition to

reloading the refrigerating gas.

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Beko BUDL 700 Specifications Page 25