Screw compressor WALTER SF 55 DSP input power 55 kW, air delivery 4.74–11.86 m³/min at 8 bar, two-stage, IE5 motor, 7-year warranty
Code: SF-55-DSPProduct detailed description
Two-stage screw compressor WALTER SF 55 DSP for higher air consumption
The SF 55 DSP is the most powerful model in the housing it shares with the SF 45 DSP. At 8 bar it delivers up to 11.86 m³/min, at 10 bar 10.58, and at 13 bar 7.99 m³/min.
The single-stage SF 55 KSP delivers 9.41 m³/min at 8 bar, while the two-stage SF 55 DSP delivers 26% more. However, the machine is heavier: 1,663 kg versus 1,128 kg.
Configuration of this machine
- Two-stage screw block · direct drive 1:1 · IE5 magnetic motor with inverter
- Three pressures: 8, 10 and 13 bar
- Housing shared with the SF 45 DSP, weight 1,663 kg
- G 2″ connection, 65 dB(A) noise level
- Power supply 400 V / 3 / 50 Hz, WALTER CONTROLLER control unit


Who it suits
It suits applications where several larger appliances run simultaneously and the distribution system needs stable pressure. At 13 bar, the control range is 3.2–7.99 m³/min.
When to choose a different model
Lower consumption
SF 45 DSP is in the same housing and delivers up to 9.14 m³/min at 8 bar. It weighs 1,144 kg.
Higher consumption
SF 75 DSP delivers up to 15.7 m³/min at 8 bar, but is in a larger housing (2,256 × 1,469 × 1,700 mm).
What the parameters imply — calculated values
The values are calculated from the maximum air delivery at 8 bar and serve for comparing models with each other, not as a guaranteed value.
Frequently asked questions
- How much air does it deliver at 10 bar?
- The regulation range is 4.23–10.58 m³/min. The inverter continuously adjusts it according to demand.
- How does it differ from the single-stage SF 55 KSP?
- The two-stage block delivers more air at the same power input (11.86 vs. 9.41 m³/min at 8 bar) and has an IE5 magnetic motor.
The machine is covered by a 7-year warranty on the entire machine. Warranty terms, maintenance, and a comparison of all 13 models can be found in the category WALTER SF DSP screw compressors: two-stage compression.
Ventilek advises
Whoever is looking for the most powerful machine in a 2,132 × 1,318 × 1,600 mm cabinet will end up with the SF 55 DSP. Above 11.86 m³/min at 8 bar, a larger cabinet will be needed.
Additional parameters
| Category: | Air compressors |
|---|---|
| Warranty: | 7 let |
| Compressor type: | Screw compressor |
| Pressure: | 8 bar, 10 bars, 13 bar |
| Air delivery: | 11 860 l/min |
| Pressure vessel volume: | It isn't |
| Connecting: | 2" |
| Motor power: | 55 kW |
| Mains voltage: | 400/50 V/Hz |
| Lubrication: | Oleic |
| Noise: | 65 dB(A) |
| Weight: | 1 663 kg |
| Engine: | Electric |
| Drive: | Direct |
| Air dryer: | No |
| Retrieved from: | Professional |
| Development: | Stationary |
| Inverter: | Yes |
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WALTER Kompressortechnik - Innovative Solutions for Compressors
- About the company WALTER: WALTER Kompressortechnik is a renowned manufacturer of air compressors and accessories, known for its quality, reliability and innovative technologies. The company focuses on providing highly efficient solutions for various industries.
- Product portfolio:
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