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-DSP
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Šroubový kompresor WALTER SF 55 DSP
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up to 14 days
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02.11.2026
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The more powerful of the pair of two-stage machines in a shared housing with the SF 45 DSP, for operation with several larger consumers at the same time. It weighs 1,663 kg, connection G 2″, noise level 65 dB(A).

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Product 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.

11.86m³/min maximum air delivery at 8 bar
55kW motor power input
65dB(A) noise level
8–13bar operating pressure

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
Two-stage screw block and separation tank of the WALTER SF DSP compressor
Two-stage screw airend and separator tank, SF DSP series
Compression diagram: savings of the two-stage block compared to the single-stage block
The green area is the saving of two-stage compression over single-stage

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

0.216m³/min of air delivery per 1 kW of power input at 8 bar
+26%air at 8 bar compared to the single-stage SF 55 KSP

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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