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-KSPProduct 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.
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


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
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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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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- Mobile compressors: lightweight and easily portable compressors that allow easy use in a variety of locations, ideal for construction and field work.
- Scroll and special compressors: provide quiet operation and are suitable for specific applications requiring minimal vibration and noise.
- Innovation and quality: WALTER emphasizes continuous development and improvement of its products to ensure maximum customer satisfaction. Their compressors are equipped with advanced technologies to optimise performance and save energy.
- Customer support and service: the company offers comprehensive service, including installation, maintenance and diagnostics, ensuring the long-term reliability and efficiency of their equipment.

