Becker O 5.21 Vacuum Pump
The Becker O 5.21 is a compact oil lubricated rotary vane vacuum pump designed for dependable continuous operation on small machinery, packaging equipment, laboratory systems and general OEM vacuum applications.
Vacuum Pumps UK can supply new Becker O 5.21 vacuum pumps and provide technical advice for replacement pump installations.
Where an exact Becker replacement is not essential, we can assess whether the DVP LC25 offers a suitable and cost-effective alternative with closely matched pumping capacity and vacuum performance.
New Becker pumps, DVP alternatives and technical application support from Vacuum Pumps UK.
Need a new or replacement pump?
Send us the model number, motor details and application information.
We can quote the Becker O 5.21 or advise whether the DVP LC25 is suitable.
Pump Type
Oil Lubricated
rotary vane pump
Capacity
23.5 / 27 m³/h
50Hz / 60Hz
Ultimate Vacuum
2 mbar
absolute
Motor Power
0.75 / 0.9
kW 50Hz / 60Hz
Becker O 5.21 Overview
The Becker O 5.21 is a compact oil lubricated rotary vane vacuum pump designed for continuous industrial service where dependable vacuum performance and modest pumping capacity are required.
With a nominal pumping speed of 23.5 m³/h at 50Hz, it is well suited to packaging machines, medical and laboratory equipment, vacuum holding duties and other compact OEM machinery.
Oil within the pump lubricates the working components, assists sealing and helps control operating temperature. Integrated exhaust separation helps recover oil and reduce oil mist from the exhaust.
Vacuum Pumps UK can assist with the supply of a new Becker O 5.21 where the original pump specification needs to be retained.
Becker O 5.21 Technical Specifications
The figures below provide a general technical reference for the standard Becker O 5.21. Motor voltage, connection details and individual pump configuration should be confirmed before ordering.
| Model | Nominal Capacity m³/h 50Hz / 60Hz |
Ultimate Vacuum mbar absolute 50Hz / 60Hz |
Motor Power kW 50Hz / 60Hz |
| Becker O 5.21 | 23.5 / 27.0 | 2.0 / 2.0 | 0.75 / 0.9 |
Becker O 5.21 Pump Features
Oil Lubricated Rotary Vane
Oil provides lubrication and sealing within the pumping chamber while supporting stable vacuum performance.
Compact Pump Design
The compact construction is suited to smaller machines and OEM installations where available space is limited.
Integrated Exhaust Separation
The pump incorporates exhaust separation to help retain oil and minimise oil mist emissions.
Continuous Duty Capability
The O 5.16 is intended for continuous operation when correctly selected, installed and maintained.
Compact Industrial Vacuum Duties
Its 23.5 m³/h pumping speed makes it suitable for a wide range of compact industrial and OEM vacuum applications.
Straightforward Service Access
Routine maintenance and inspection are simplified by the compact, direct-drive pump design.
Typical Becker O 5.21 Applications
The Becker O 5.21 is commonly used where compact and dependable oil lubricated vacuum performance is required.
› Packaging machines
› Laboratory equipment
› Medical and dental systems
› Vacuum handling equipment
› General OEM vacuum duties
› Printing and paper machinery
› Vacuum holding fixtures
› Chamber vacuum packers
› Compact process machinery
› Research and development equipment
New Becker O 5.21 Vacuum Pump Supply
Vacuum Pumps UK can supply new Becker O 5.21 vacuum pumps for existing machinery, planned replacement work and new compact equipment installations.
Where the existing machine or customer specification requires the original Becker model, we can quote the correct pump and confirm the relevant motor, voltage and connection details.
Contact us with the existing pump nameplate or full model information for price and availability.
DVP LC25
Higher-capacity 25 m³/h oil lubricated vacuum pump
Comparable DVP Alternative
Consider the DVP LC25
Where an exact Becker replacement is not essential, the DVP LC25 may provide a suitable and cost-effective alternative to the Becker O 5.21.
With a nominal capacity of 25 m³/h at 50Hz and 29 m³/h at 60Hz, the LC25 provides a modest increase in pumping capacity over the Becker O 5.21.
The DVP LC25 has a stated final pressure of 0.5 mbar absolute, compared with 2 mbar absolute for the Becker pump, providing a deeper vacuum capability where the application requires it.
The DVP LC25 is designed for continuous industrial operation and is suitable for packaging machines, chamber vacuum packers, OEM equipment and replacement installations requiring dependable vacuum performance.
An integrated oil damping and recovery system, incorporating a by-pass and automatic float-operated oil recovery valve, helps minimise oil vapour emissions from the exhaust. An anti-suck-back device also helps prevent oil from being drawn back into the connected system if the pump stops while operating under vacuum.
Although the LC25 is a closely aligned alternative, mounting dimensions, inlet position, connections, motor voltage and installation arrangements must still be checked before changing pump model.
Vacuum Pumps UK is the UK and Ireland Master Agent for DVP Vacuum Technology.
Becker O 5.21 and DVP LC25 Comparison
The comparison below shows the principal technical figures for each model. Final suitability should be checked against the machine, application and installation requirements.
| Specification | Becker O 5.21 | DVP LC25 |
| Pump Technology | Oil lubricated rotary vane | Oil lubricated rotary vane |
| Nominal Capacity 50Hz | 23.5 m³/h | 25 m³/h |
| Nominal Capacity 60Hz | 27 m³/h | 29 m³/h |
| Maximum Vacuum | 2 mbar absolute | 0.5 mbar absolute |
| Motor Power 50Hz | 0.75 kW | 0.75 kW |
| Motor Power 60Hz | 0.9 kW | 0.9 kW |
| Oil Recovery System | Integrated oil separation | Integrated oil damping and recovery system |
Important: Mounting dimensions, inlet position, connection size, motor voltage, operating pressure and process conditions should always be checked.
Why Consider the DVP LC25?
Many customers searching for a Becker O 5.21 require a reliable compact oil lubricated vacuum pump rather than a specific manufacturer.
Modest Capacity Increase
The LC25 provides 25 m³/h at 50Hz and 29 m³/h at 60Hz, giving a modest increase over the Becker pump.
Deeper Vacuum Capability
The LC25 has a stated final pressure of 0.5 mbar absolute, compared with 2 mbar for the Becker pump.
Cost-Effective Option
The LC25 may provide a cost-effective purchase option where an exact Becker replacement is not required.
Factory-Backed Support
Vacuum Pumps UK provides DVP application advice, genuine spares and official UK support.
Becker O 5.21 Parts, Oil Separators and Service
If your existing Becker O 5.21 may still be repairable, our sister company VacAir Superstore provides specialist support for Becker pump servicing, workshop overhaul and replacement components.
VacAir Superstore has been the UK’s leading independent supplier of replacement vacuum pump vanes, service kits, separators, filters, oils and spare parts for Becker vacuum pumps since 1996.
VacAir’s experienced Becker and Busch pump service engineers can assist with reduced vacuum, exhaust smoke, oil mist, oil leaks, overheating, excessive noise and internal pump damage.
Spare Parts
Replacement components for servicing and repairing the Becker O 5.21.
Oil Separators
Replacement exhaust separators to help control oil mist and maintain reliable operation.
Pump Oil
Suitable vacuum pump oils for routine maintenance and planned oil changes.
Service and Repair
Workshop inspection, servicing, repair and full vacuum pump overhaul.
Becker O 5.21 Frequently Asked Questions
What type of vacuum pump is the Becker O 5.21?
It is a compact oil lubricated rotary vane vacuum pump used on small machinery and general industrial vacuum applications.
What is the capacity of the Becker O 5.21?
The stated nominal pumping capacity is 23.5 m³/h at 50Hz and 27 m³/h at 60Hz.
What vacuum level can the Becker O 5.21 achieve?
The stated ultimate pressure is 2 mbar absolute.
Can Vacuum Pumps UK supply a new Becker O 5.21?
Yes. Vacuum Pumps UK can supply new Becker O 5.21 vacuum pumps, subject to specification and availability.
What is the DVP alternative to the Becker O 5.21?
The DVP LC25 is the nearest comparable DVP option, providing a modest increase in capacity and a deeper stated final pressure.
Is the DVP LC25 a direct replacement?
Not necessarily. The LC25 provides slightly higher pumping capacity and a deeper stated final pressure, but dimensions, connections, motor details and installation requirements must be checked before changing pump model.
Can my existing Becker O 5.21 be repaired?
Many pumps can be serviced or overhauled depending on their internal condition. VacAir can provide specialist Becker pump inspection, repair and refurbishment support.
Need a Becker O 5.21 or DVP LC25?
Contact Vacuum Pumps UK for prices, availability, technical advice and replacement pump recommendations.
Send us your existing pump model and application details and we will advise on the most suitable option.
