BUSCH SIMPLEX, Руководство по эксплуатации

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3 | Product description
0870169324
_VD 0025 ‐ 0100G_ ‐ 0006_IM_en
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3.4 Function principle
3.4.1 Vacuum system VD
Gas delivery from the vacuum vessel is effected by the single ‐ stage rotary vane vacuum pump.
Pressure gas is exhausted against the atmosphere.
The target values are set to the desired switch ‐ on and switch ‐ off values on the contact vacu ‐
um gauge on the vacuum vessel. When the lower switching point is reached, the vacuum
pump is switched off. When the vacuum in the vacuum vessel is used up, the pressure in the
vessel increases and when the upper switching point is reached, the vacuum pump is switched
on again and evacuates the vacuum vessel.
3.4.2 Rotary vane vacuum pump R5 RA
Fig. 3: Operating principle of the rotary vane vacuum pump R5 RA
The vacuum pump R5 RA works according to the rotary vane principle.
The oil seals the spaces, lubricates the sliders and discharges the compression heat. The oil fil ‐
ter cleans the circulating oil.
Then the exhaust filters separate the oil from the discharged gas.
3.4.3 Gas ballast valve
The vacuum pump is equipped with a gas ballast valve. The gas ballast valve is used for the
addition of a limited quantity of ambient air to the process gas, to counteract the condensa ‐
tion of vapor in the vacuum pump. The gas ballast valve reduces the final pressure of the vac ‐
uum pump, see “Technical data” in chap. 15.
3.5 Intended use
The vacuum system was designed for conveying air and other dry, non ‐ aggressive, non ‐ toxic
and non ‐ explosive gases.
Conveying any other media leads to increased thermal and/or mechanical stress of the vacu ‐
um system and is only permitted in coordination with Busch.
The vacuum system is designed for operation in a non ‐ hazardous area. The vacuum system
can be operated continuously at final pressure and is suitable for continuous operation. The
permitted ambiance conditions can be found in the technical data (chap. 15).
The vacuum system is designed for indoor use; for outdoor installation, contact Busch to
make special arrangements if necessary.