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R5 RA 0155 A

R5 – proven and reliable. Over 3 million pumps in operation worldwide.

R5 – proven and reliable. Over 3 million pumps in operation worldwide.

The R5 RA 0155 A belongs to the Busch product family of proven R5 rotary vane vacuum pumps. It has been specially designed for use in continuous operation in the rough vacuum range, for pumping of large volumes and when working at ultimate pressure. You will find more information on advantages, technology, accessories and spare parts, applications as well as a complete product overview on our R5 RA series type page.

Series Type Page R5 RA
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Contact us directly (Busch United States):
Get in contact or 1-800-USA-PUMP

R5 – proven and reliable. Over 3 million pumps in operation worldwide.

R5 – proven and reliable. Over 3 million pumps in operation worldwide.


Technical Specifications

Rotary vane technology is synonymous with a robust, functional construction. R5 rotary vane vacuum pumps are characterized by an optimum design and perfectly synchronized components and materials. The constantly high vacuum level in continuous operation is ensured by recirculating oil lubrication and state-of-the-art precision manufacturing.


A sophisticated oil separator ensures efficient use of oil. When fitted with a gas-ballast valve (optional), even large quantities of vapour can be extracted. A non-return valve in the inlet flange prevents the pumped medium from flowing back into the vacuum process after the vacuum pump is switched off. The R5 RA 0155 A is driven by a directly flange-mounted standard electric motor, with an efficiency class of IE3.

Dimensional drawing R5 RA 0155 A
R5 RA 0155 A
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data R 5 RA 0155 A
Nominal pumping speed 103 ACFM
Ultimate pressure 0.075 Torr
Nominal motor rating 5 HP
Nominal motor speed 1800 RPM
Power consumption at 75 Torr 4 HP
Power consumption at ultimate pressure 3.3 HP
Noise level (ISO 2151) 72 dB(A)
Oil capacity 3.7 Qts.
Approximate weight 243 Lbs.*
Dimensions (L x W x H) 32 x 18 1/2 x 13 3/8 inches
Gas inlet / outlet 2" / 2" NPT
* values may vary slightly due to different motor versions

Technical Specifications

Rotary vane technology is synonymous with a robust, functional construction. R5 rotary vane vacuum pumps are characterized by an optimum design and perfectly synchronized components and materials. The constantly high vacuum level in continuous operation is ensured by recirculating oil lubrication and state-of-the-art precision manufacturing.


A sophisticated oil separator ensures efficient use of oil. When fitted with a gas-ballast valve (optional), even large quantities of vapour can be extracted. A non-return valve in the inlet flange prevents the pumped medium from flowing back into the vacuum process after the vacuum pump is switched off. The R5 RA 0155 A is driven by a directly flange-mounted standard electric motor, with an efficiency class of IE3.

Dimensional drawing
R5 RA 0155 A
R5 RA 0155 A
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data R 5 RA 0155 A
Nominal pumping speed 103 ACFM
Ultimate pressure 0.075 Torr
Nominal motor rating 5 HP
Nominal motor speed 1800 RPM
Power consumption at 75 Torr 4 HP
Power consumption at ultimate pressure 3.3 HP
Noise level (ISO 2151) 72 dB(A)
Oil capacity 3.7 Qts.
Approximate weight 243 Lbs.*
Dimensions (L x W x H) 32 x 18 1/2 x 13 3/8 inches
Gas inlet / outlet 2" / 2" NPT
* values may vary slightly due to different motor versions

Accessories and spare parts

  • Gas-ballast valve
  • Various inlet filters
  • Adapter flange for vacuum booster
  • Filter pressure gauge
  • Vacuum pump oils for all applications
  • Oil level switch
  • Temperature sensors
  • Starter unit
  • Oxygen version

Downloads

R5 RA 0155 A

Would you like to know more?
Contact us directly (Busch United States):
1-800-USA-PUMP Get in contact

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