Becker SV 400/2 4 kW Side Channel Blower
The Becker SV 400/2 4 kW is a high-differential double-stage side channel blower combining 195 m³/h nominal capacity with particularly strong positive-pressure performance.
At 50 Hz it provides maximum relative vacuum of -440 mbar and maximum positive pressure of +530 mbar. At 60 Hz the corresponding 4.8 kW motor increases nominal flow to 235 m³/h while maintaining -440 mbar maximum vacuum and providing up to +500 mbar positive pressure.
The larger motor is used primarily to increase the differential available from the SV 400/2 rather than its nominal 50 Hz flow, making this configuration suitable for restrictive vacuum and pressure systems.
Becker SV side channel blower supply and technical support from Vacuum Pumps UK.
Need an SV 400/2 4 kW?
Provide the existing blower details or the airflow and working vacuum or pressure required.
Our team can help assess the correct blower duty.
Blower Type
Double Stage
side channel blower
Nominal Capacity
195 m³/h
at 50 Hz
Maximum Vacuum
-440 mbar
relative at 50 Hz
Maximum Pressure
+530 mbar
relative at 50 Hz
Motor Power
4 kW
50 Hz motor
High Pressure Differential from the SV 400/2
The defining feature of the 4 kW SV 400/2 is its ability to combine a nominal 195 m³/h airflow with up to +530 mbar positive pressure. This gives the blower considerably greater pressure capability than the 3 kW configuration while retaining the same nominal 50 Hz volume flow.
The vacuum performance is also substantial, reaching -440 mbar relative at 50 Hz. At 60 Hz the corresponding 4.8 kW configuration continues to provide -440 mbar maximum vacuum while nominal flow increases to 235 m³/h.
This performance profile makes the blower especially relevant to pneumatic conveying, blast-air and other restrictive pressure applications, while still retaining the suction capability required for demanding vacuum duties.
Air is compressed aerodynamically through two successive side channel stages. There are no rubbing vanes within the process-air path and no lubricating oil is required within the compression chamber.
At differential levels above 500 mbar, the installation itself becomes particularly important. Pipe size, filter condition, valves, process restrictions and relief protection all influence the actual operating point, temperature and motor load.
Becker SV 400/2 4 kW Technical Specifications
At 50 Hz the corresponding motor rating is 4 kW and nominal flow increases to 195 m³/h. Maximum relative vacuum remains -440 mbar, while maximum positive pressure is +530 mbar.
| Frequency | Nominal Capacity | Maximum Vacuum | Maximum Pressure | Motor Power | Weight |
| 50 Hz | 195 m³/h | -440 mbar | +530 mbar | 4 kW | 53.3–54 kg |
| 60 Hz | 235 m³/h | -440 mbar | +500 mbar | 4.8 kW | 53.3–54 kg |
Vacuum and pressure figures are relative. Becker lists approximately 53.3–54 kg depending on the exact motor construction.
Key Features of the SV 400/2 4 kW
+530 mbar Pressure
High 50 Hz positive-pressure capability suits restrictive conveying, blast-air and industrial process applications.
-440 mbar Vacuum
Strong suction differential provides useful capability for demanding vacuum handling and process systems.
Double-Stage Design
Two side channel stages build increased differential while maintaining non-contact compression.
Oil-Free Process Air
The compression chamber requires no lubricating oil, helping protect applications requiring clean airflow.
235 m³/h at 60 Hz
The corresponding 4.8 kW 60 Hz configuration increases nominal flow while retaining strong differential capability.
Integrated Silencers
Inlet and discharge silencers are incorporated into the blower construction to help manage operating sound.
Demanding High-Differential Applications
The 4 kW SV 400/2 is particularly suited where useful airflow must be maintained against substantial suction or discharge differential.
› Pneumatic conveying
› Blast-air applications
› Waste water aeration systems
› Industrial drying
› Restrictive process-air systems
› Vacuum lifting and handling
› Vacuum fixing and clamping
› Printing and paper machinery
› Packaging machinery
› General industrial equipment
SV 400/2 4 kW Supply and Duty Selection
Vacuum Pumps UK can assist with Becker SV 400/2 4 kW blower supply for replacement equipment, industrial machinery and new vacuum or positive-pressure systems.
For replacement requirements, provide the complete blower and motor nameplate information. This is important because the 3 kW and 4 kW versions share the same nominal 195 m³/h airflow but have substantially different maximum pressure capabilities.
For new installations, provide the required airflow at the actual working vacuum or positive pressure. We can also consider significant system restrictions such as pipework, filtration and control valves.
At up to +530 mbar pressure, suitable relief protection and system design are particularly important to keep the blower operating within its intended duty.
Accessories for High-Differential SV 400/2 Systems
At higher pressure or vacuum differential, the quality of the installation has a major influence on blower operation. Correctly sized filters, pipework and relief devices can help prevent unnecessary load and temperature.
Inlet Filters
Correct filtration protects the blower while minimising avoidable suction-side pressure loss.
Vacuum Relief Valves
Vacuum relief can protect against excessive suction differential caused by process restriction or blocked filtration.
Pressure Relief Valves
Pressure relief is particularly important where a blocked discharge could push the blower beyond its intended operating differential.
Installation Accessories
Suitable pipework, flexible connectors and non-return valves help minimise unnecessary system losses.
Becker SV 400/2 4 kW Service, Repair and Spare Parts
The SV 400/2 uses non-contact compression, but reliable operation still depends on the condition of the motor, bearings, impeller and the resistance presented by the connected system.
On a high-differential installation, dirty filtration, closed valves or pipework restriction can increase load and temperature substantially. The complete system should therefore be considered when diagnosing an apparent blower fault.
Vacuum Pumps UK can assist with Becker SV blower servicing, performance investigation and workshop repair.
Blower Service
Technical support for maintenance, operating conditions and performance issues affecting Becker SV blowers.
Blower Repair
Workshop investigation of noisy, damaged, overheating or under-performing Becker side channel blowers.
Spare Parts
Becker spare parts and replacement filtration are available through our sister company VacAir Superstore.
Becker SV 400/2 4 kW Frequently Asked Questions
What airflow does the Becker SV 400/2 4 kW provide?
Nominal volume flow is 195 m³/h at 50 Hz and 235 m³/h at 60 Hz.
What maximum vacuum can it achieve?
Maximum relative vacuum is -440 mbar at both 50 Hz and 60 Hz.
What is the maximum positive pressure?
Maximum relative pressure is +530 mbar at 50 Hz and +500 mbar at 60 Hz.
How does the 4 kW SV 400/2 differ from the 3 kW version?
Both have the same nominal 195 m³/h capacity and the same -440 mbar maximum vacuum at 50 Hz. The major difference is positive-pressure capability, which increases from +390 mbar to +530 mbar.
Why does the larger motor not increase nominal 50 Hz airflow?
The additional motor power is principally used to allow the blower to operate against greater differential rather than increasing its nominal free-air capacity.
Does the SV 400/2 require lubricating oil in the compression chamber?
No. The side channel compression process is oil-free and non-contact within the process-air path.
Can Vacuum Pumps UK assist with an SV 400/2 application?
Yes. Provide the required airflow and normal operating differential, or send us the blower and motor nameplates for an existing unit, and we can assist with selection, supply, service or repair.
Need a Becker SV 400/2 4 kW Side Channel Blower?
Contact Vacuum Pumps UK for Becker blower supply, technical selection, accessories, servicing and repair.
Send us your existing blower details or tell us the airflow and operating differential required.
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