Becker U4.20 Vacuum Pump
The Becker U4.20 is an oil lubricated rotary vane vacuum pump used across compact industrial machinery and smaller vacuum systems.
The Becker U4.20 is no longer a current Becker model and was generally superseded by later O5 or U5-series pumps. Vacuum Pumps UK can support existing installations and assess the most suitable current Becker replacement or alternative pump where a change is required.
Becker supply, DVP alternatives and technical application support from Vacuum Pumps UK.
Need a replacement pump?
Send us the existing nameplate and application details and we will check the most suitable option.
Pump Type
Oil Lubricated
rotary vane
Capacity
18 / 21 m³/h
50Hz / 60Hz
Maximum Vacuum
1.0 mbar
absolute at 50Hz
Motor
0.55 / 0.66 kW
50Hz / 60Hz
Becker U4.20 Overview
The Becker U4.20 uses oil-lubricated rotary vane technology to provide stable vacuum performance for continuous industrial service. The oil film supports sealing inside the pumping chamber, while the pump construction is intended for reliable operation on production equipment.
With a nominal pumping speed of 18 m³/h at 50Hz and 21 m³/h at 60Hz, the pump sits within the Becker U4 range for applications where robust vacuum performance is required.
Its stated maximum vacuum is 1.0 mbar absolute at 50Hz. When replacing an existing unit, the required working pressure, pipework, motor supply and machine duty should all be checked rather than selecting by capacity alone.
The U4 series is no longer part of Becker’s current production range and was followed by later O5 or U5 models. However spare parts and service support remain available from Vacuum Pumps UK, alongside certified refurbished pumps.
Becker U4.20 Technical Specifications
| Model | Capacity m³/h 50Hz / 60Hz |
Maximum Vacuum mbar abs. |
Motor kW 50Hz / 60Hz |
| Becker U4.20 | 18 / 21 | 1.0 / 1.5 | 0.55 / 0.66 |
Typical Applications
DVP LC20
20 m³/h at 50Hz
DVP Alternative
Consider the DVP LC20
Where an exact Becker replacement is not essential, the DVP option can be assessed as a compact replacement.
The DVP LC20 provides 20 / 24 m³/h at 50Hz / 60Hz, compared with 18 / 21 m³/h for the Becker pump.
Its stated final pressure is 2.0 mbar absolute, closely aligned with the Becker pump’s vacuum duty.
The DVP alternative combines straightforward servicing with an integrated oil recovery arrangement, exhaust mist elimination and anti-suck-back protection.
Vacuum Pumps UK is the UK and Ireland Master Agent for DVP Vacuum Technology.
Becker U4.20 and DVP LC20 Comparison
The figures below show the main performance differences. Final selection should be based on the actual operating pressure, required flow, electrical supply and installation arrangement.
| Model | Capacity m³/h 50Hz / 60Hz |
Final Pressure mbar abs. |
Motor kW 50Hz / 60Hz |
| Becker U4.20 | 18 / 21 | 1.0 / 1.5 | 0.55 / 0.66 |
| DVP LC20 | 20 / 24 | 2.0 | 0.75 / 0.9 |
Becker U4.20 Spare Parts, Oil Separators, Oil, Service and Repair
Although the Becker U4 series is no longer the current Becker range, keeping an existing U4 pump running can still remain more practical than changing the pump installation, particularly where the pump is otherwise in good condition. Our sister company VacAir Superstore can support these pumps with replacement parts, planned maintenance, workshop repairs and complete overhauls.
VacAir Superstore supplies replacement components and service support for Becker oil lubricated rotary vane pumps, including older U4 models that may remain in service for many years.
Whether the requirement is routine maintenance, reduced vacuum performance, excessive oil mist, oil leaks, overheating, unusual noise or a complete pump failure, the existing pump can be assessed before replacement is considered.
Spare Parts
Replacement parts for routine maintenance and mechanical repair of the Becker U4.20, including seals, gaskets, filters and other service components subject to pump version and availability.
Oil Separators
Replacement exhaust oil separators are an important service item on oil lubricated pumps. Worn or saturated separators can contribute to exhaust smoke, oil mist and increased back pressure.
Vacuum Pump Oil
Correct vacuum pump oil is essential for lubrication, sealing and temperature control. VacAir can advise on suitable oil for routine changes and service work on Becker oil lubricated pumps.
Service & Maintenance
Planned servicing can help maintain vacuum performance and reduce the risk of production stoppages. Service work can include oil and filter changes, separator replacement, inspection and performance checks.
Repair & Overhaul
If the pump has lost vacuum, become noisy, is passing excessive oil or has suffered internal wear, VacAir can inspect the unit and advise whether repair or a full workshop overhaul is economically worthwhile.
Becker U4.20 Frequently Asked Questions
What type of pump is the Becker U4.20?
It is an oil lubricated rotary vane vacuum pump designed for continuous industrial vacuum duty.
What is the pumping capacity?
The stated nominal capacity is 18 m³/h at 50Hz and 21 m³/h at 60Hz.
What vacuum level does it achieve?
The stated maximum vacuum is 1.0 mbar absolute at 50Hz and 1.5 mbar absolute at 60Hz.
What DVP alternative can be considered?
DVP LC20 can be assessed depending on the required flow, final pressure and installation details.
Is the DVP pump a direct replacement?
Not automatically. Capacity, vacuum level, dimensions, pipe connections, motor rating and electrical supply should be checked before changing pump model.
Is the Becker U4.20 still a current Becker model?
No. The U4 range was superseded by later U5-series pumps. Many U4 units remain in service, and Vacuum Pumps UK / VacAir can support repair, servicing, spare parts and replacement selection.
Need a Becker U4.20 or DVP Alternative?
Contact Vacuum Pumps UK for prices, availability, technical advice and replacement pump recommendations.
Send us the existing pump model and application details and we will advise on the most suitable option.
