WALTER SK 55 KSP Screw Compressor power input 55 kW, air delivery 9.41 m³/min at 8 bar, direct drive, fixed speed, 7-year warranty

Code: SK-55-KSP
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Šroubový kompresor WALTER SK 55 KSP
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up to 14 days
Delivery to:
02.11.2026
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The first model in the series with a G 2″ connection, designed for larger operations with constant demand. The 2,158 × 1,331 mm housing is shared with the SK 75 KSP, weight 1,128 kg, noise level 68 dB(A).

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Product detailed description

WALTER SK 55 KSP screw compressor with G 2″ connection, the first model of the larger housing

The SK 55 KSP is the first model in the SK KSP range in a 2,158 × 1,331 × 1,600 mm housing and with a G 2″ connection. At 8 bar it delivers 9.41 m³/min, at 10 bar 8.7, and at 13 bar 7.13 m³/min.

Compared to the SK 45 KSP, it has 10 kW more power input and weighs 438 kg more (1,128 kg versus 690 kg). The noise level of 68 dB(A) is 2 dB(A) higher.

9.41m³/min air delivery at 8 bar
55kW motor power input
68dB(A) noise level
8–13bar operating pressure

Configuration of this machine

  • Screw element coupled directly to the motor · fixed speed without inverter · three-stage oil separation
  • Air delivery of 9.41 m³/min at 8 bar, 8.7 at 10 bar, and 7.13 at 13 bar
  • Housing shared with the SK 75 KSP, weight 1,128 kg
  • G 2″ connection, 68 dB(A) noise level
  • Power supply 400 V / 3 / 50 Hz, WALTER CONTROLLER control unit
Piping and oil distribution in the housing of the WALTER SK KSP compressor
Piping and oil lines in the housing
Electric motor with cooling fins in the WALTER SK KSP compressor
Electric motor with cooling fins

Who it suits

For larger operations with several outlet points, where consumption is constant and the simplest design without an inverter makes sense. At a weight of 1,128 kg, the floor load capacity needs to be checked.

When to choose a different model

More air in the same cabinet

In the same housing, the SK 75 KSP delivers more air: at 8 bar 12.7 m³/min, i.e. 35% more, and the machine is 97 kg heavier.

Two-stage compression

With two-stage compression and an inverter, there is the SF 55 DSP: at 8 bar it delivers up to 11.86 m³/min, 26% more, and the noise level is 3 dB(A) lower. However, it weighs 1,663 kg.

What the parameters imply — calculated values

0.171m³/min of air delivery per 1 kW of input power at 8 bar
76%of the air delivery at 8 bar remains at a pressure of 13 bar

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 large is the housing compared to the SK 45 KSP?
2,158 × 1,331 × 1,600 mm versus 1,500 × 1,030 × 1,280 mm. The machine is longer, wider and taller, and weighs 438 kg more.
What is the connection?
G 2″, i.e. one size larger than on the SK 45 KSP (G 1½″). The SK 75 KSP has the same connection.

The machine is covered by a 7-year warranty on the entire machine. Warranty conditions, maintenance, and a comparison of all 17 models can be found in the category WALTER SK KSP screw compressors: direct drive without losses.

Ventilek advises

The housing is 2,158 mm long and 1,600 mm tall, so it cannot simply be tucked into a corner of the workshop. It needs its own dedicated space with access for servicing.

Additional parameters

Category: Air compressors
Warranty: 7 let
Compressor type: Screw compressor
Pressure: 8 bar, 10 bars, 13 bar
Air delivery: 9 410 l/min
Pressure vessel volume: It isn't
Connecting: 2"
Motor power: 55 kW
Mains voltage: 400/50 V/Hz
Lubrication: Oleic
Noise: 68 dB(A)
Weight: 1 128 kg
Engine: Electric
Drive: Direct
Air dryer: No
Retrieved from: Professional
Development: Stationary
Inverter: No

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