BUSCH RA 0305 D User Manual

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Instruction Manual

R5 ATEX

Oil-Lubricated Rotary Vane Vacuum Pumps

RA 0165 D, RA 0205 D, RA 0255 D, RA 0305 D

0870570604/-0011_en / Original instructions / Modifications reserved 12/03/2021

Ateliers Busch S.A.

Zone industrielle, 2906 Chevenez

Switzerland

Table of Contents

Other manuals for BUSCH RA 0305 D

Instruction Manual Supplement12 pages

Installation And Operating Instructions28 pages

Questions and Answers:

J
Jessica Martinez DDSSep 7, 2025
What to do if my BUSCH RA 0305 D runs too hot?
- C
  Candice SalazarSep 7, 2025
  If your BUSCH Water Pump is running too hot, several factors could be the cause. Insufficient cooling may be the issue, so remove any dust and dirt from the machine. Also, the ambient temperature might be too high, so observe the permitted ambient temperature. Low oil level can also cause overheating, so top up the oil. Lastly, partially clogged exhaust filters (EF) could be the problem, in which case replace the exhaust filters (EF).
G
Gabrielle WoodAug 23, 2025
Why is the oil in my BUSCH RA 0305 D emulsified?
- D
  Dale HicksAug 25, 2025
  If the oil in your BUSCH Water Pump is emulsified, it might be because the machine sucked in liquids or significant amounts of vapor, in which case you should contact Busch to flush the machine. Also, clean the filter of the gas ballast valve (GB). Consider modifying the operational mode.
S
Shawn RodgersAug 25, 2025
Why BUSCH Water Pump fumes or expels oil?
- D
  danielalvarezAug 26, 2025
  If your BUSCH Water Pump is fuming or expelling oil droplets, it could be due to: partially clogged exhaust filters (EF) – replace them; an exhaust filter (EF) with o-ring not fitted properly – ensure correct positioning; or a malfunctioning float valve (FV) – contact Busch for repair.
K
kalvaradoAug 26, 2025
Why BUSCH RA 0305 D Water Pump has abnormal oil consumption?
- B
  Bernard ParkerAug 27, 2025
  Abnormal oil consumption in your BUSCH Water Pump can stem from a few issues: oil leaks (contact Busch to replace seals), a malfunctioning float valve (FV) (contact Busch to check and repair the float valve and oil return line), or running the machine at atmospheric pressure for an extended period (ensure the machine operates under vacuum).
R
Rachel HolmesAug 27, 2025
What does it mean if the oil in my BUSCH Water Pump is emulsified?
- P
  Patrick GrahamAug 27, 2025
  If the oil in your BUSCH Water Pump is emulsified, it's likely that the machine has sucked in liquids or significant amounts of vapor.
M
Michael PopeAug 29, 2025
What to do if my BUSCH RA 0305 D does not start?
- K
  Kristine RiceAug 29, 2025
  If your BUSCH Water Pump doesn't start, it could be due to several reasons. First, check if the motor is receiving the correct voltage. If the voltage is correct, the motor might be defective and need replacement. Another possible cause is a defective coupling (CPL), which would also require replacement.
J
Jo DavisSep 13, 2025
Why BUSCH RA 0305 D Water Pump does not start?
- J
  Jacqueline HunterSep 13, 2025
  Your BUSCH Water Pump might not start due to several reasons: the motor may not be receiving the correct voltage (check the voltage), the motor itself could be defective (replace the motor), or the coupling (CPL) might be defective (replace the coupling).
M
Megan LiuSep 8, 2025
Why BUSCH RA 0305 D does not reach the usual pressure?
- I
  ikiddSep 8, 2025
  If your BUSCH Water Pump isn't reaching the usual pressure on the suction connection, check these potential causes: The oil level might be too low, so top up the oil. The inlet screen (IS) could be partially clogged, so clean the inlet screen (IS). If your pump has an inlet filter cartridge (optional), it might be clogged, so replace the inlet filter cartridge. If none of these resolve the issue, internal parts may be worn or damaged, so repair the machine or contact Busch.
D
Drew MurphySep 5, 2025
Why my BUSCH RA 0305 D does not start?
- M
  Michele BrownSep 6, 2025
  If your BUSCH Water Pump doesn't start, it could be due to several reasons. First, the motor might not be getting the correct voltage, in this case check the power. Alternatively, the motor itself could be defective and need replacement. Finally, a defective coupling (CPL) could also be the culprit, so replace the coupling (CPL).
J
Juan JacksonSep 3, 2025
Why is my BUSCH Water Pump running very noisily?
- C
  Christopher MartinezSep 3, 2025
  If your BUSCH Water Pump is operating with excessive noise, it could be due to a worn coupling (CPL), which would need replacement. Alternatively, stuck vanes or defective bearings might be the cause, in which case you should contact Busch for machine repair.

BUSCH RA 0305 D Specifications

General

Pumping speed	50 Hz: 290 m³/h \| 60 Hz: 350 m³/h
Ultimate pressure	0.1 hPa (mbar)
Motor rating	50 Hz: 7.5 kW \| 60 Hz: 9.0 kW
Weight	330 kg
Type	Rotary vane pump
Frequency	50 Hz

Summary

Safety

Product Description

2.5 Explanation of ATEX Classification

2.6 Safety concept

Outlines the safety concept based on preventing sparks and excessive temperatures.

2.6.1 ATEX Classifications and Associated Accessories

Defines obligatory accessories required for different ATEX classifications.

Installation

5.1 Installation Conditions

Specifies environmental and physical requirements for safe and effective machine installation.

5.2 Connecting Lines / Pipes

Details safety precautions and requirements for connecting suction and discharge lines.

5.3 Earth Connection

5.4 Filling Oil

Provides guidance on selecting the correct oil type and capacity for the machine.

5.6 Electrical Connection

5.6.1 Wiring Diagram Three-Phase Motor

5.7 Electrical Connection of the Monitoring Devices

5.8 Flowchart

Commissioning

Maintenance

7.1 Maintenance Schedule

Outlines recommended maintenance tasks and intervals for normal and harsh operating conditions.

7.2 Oil Level Inspection

7.3 Oil and Oil Filter Change

7.4 Exhaust Filter Change

Troubleshooting

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