Cast iron piston compressor WK550-4-0/100P power input 3 kW, suction capacity 530 l/min, pressure 10 bar, air receiver 100 l, voltage 400/50 V/Hz
Code: WK550-4-0/100P
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Product detailed description
WALTER Cast Iron Piston Compressor - WK550-4,0/100P
The WK550-4,0/100P features a three-cylinder cast iron unit in a 3W configuration mounted on a compact 100 l air receiver. The power input is 3.0 kW, with an intake of 530 l/min and an effective delivery rate of 440 l/min at 10 bar, with a pump speed of 1,202 rpm. It is powered by a three-phase 400 V / 50 Hz supply, with noise levels of approximately 80 dB(A) according to the manufacturer's methodology, and a 3-year warranty upon registration at waltercesko.cz.
It is the smallest and most mobile horizontal machine in the 3.0 kW class: you get a full displacement of 440 l/min without a bulky tank that would turn the compressor into a permanent fixture. It is designed for spaces where room is limited or where the machine must be moved to the work — as a powerful second source for larger operations, for assembly sites, or for workshops with heavy but intermittent demand.
Configuration of this machine
Why choose this model
A displacement of 440 l/min compared to 340 l/min in the 2.2 kW platform provides nearly a third more air, while maintaining the same tank size. This step elevates performance to the level required by orbital sanders or pneumatic choppers, which continuously draw 300 to 450 l/min — the 440 l/min displacement covers all but the most demanding tools at the upper limit of consumption.
The three-cylinder unit distributes the load over three smaller strokes instead of two larger ones, resulting in more compression cycles per revolution. The operation is smoother and output pulsations are lower than in a two-cylinder unit of comparable volume — a benefit appreciated by anyone working with a spray gun.
The small tank combined with high displacement ensures the fastest filling among horizontal 3.0 kW machines: according to manufacturer specifications, it takes approximately 2.3 minutes to go from zero to 10 bar. After the morning startup or draining of condensate, the machine returns to operation practically immediately.
The 100 l horizontal tank on wheels is the shortest horizontal variant in the 3.0 kW class. It fits where a 200 l or 270 l tank would be an obstruction, and can be easily moved around the workshop. The vertical VWK550-4,0/90P takes up even less floor space, although it is not mobile.
Design and technology
Piston, rings and cast-iron liner
The cast-iron cylinder liner and piston rings are standard service parts — the unit can be refurbished after years of use rather than discarded.
Intake filter with steel mesh
The new generation metal insert withstands repeated blowing out with compressed air, whereas a paper insert would tear after a few cleanings.
Head gaskets and valves
The redesigned cylinder head gaskets maintain pressure even after thermal cycles; valve plates are stocked as spare parts.
Inspection on a 3D measuring machine
Key dimensions of the unit are verified on a coordinate measuring machine — this ensures that parts from different series fit together perfectly.
Technical Data WK550-4,0/100P
What the data sheet doesn't tell you — calculated values
Values are calculated from manufacturer parameters and serve for comparing models with each other, not as a guaranteed figure.
Who is it for
Typical buyers include auto repair shops or metalworking facilities that already own one compressor and require a second, full-performance source for a remote station, or workshops with limited space that refuse to compromise on power. It also suits installation companies with a fixed base that need 440 l/min for tools but lack a permanent location to bolt down a compressor. Conversely, those planning continuous air consumption for hours should opt for the same pump unit with a larger tank — with 100 l, the machine will cycle frequently.
Typical applications
- 1/2" impact wrench and blow gun at a single service station
- Random orbital sander with pauses between operations
- HVLP spray gun for minor paint repairs
- Drills, ratchets and staplers at an assembly workstation
- Air source for a remote station in a larger operation
- Temporary workstation where the machine can be moved around the workshop
Where to choose a different model
A 100 l tank provides only 200 litres of free air per cycle with a pressure differential of 2 bar — with a constant draw of 200 l/min, this means approximately 33 starts per hour. With 200 l, this drops to 16, and with 270 l, to 12. If the machine runs for an entire shift, this is a more critical parameter than the dimensions.
View recommended model →The vertical VWK550-4,0/90P features the same three-cylinder pump unit and the same delivery rate, but on a vertical 90 l tank. It takes up roughly half the floor space and can be placed against a wall, which is not possible with a horizontal 100 l tank.
View recommended model →The WK550P-PLATE is the same pump unit with a motor on a base frame, without a tank. It is suitable for replacing an exhausted pump unit or when building your own custom assembly. Tank inspections and certifications remain your responsibility.
View recommended model →Service and maintenance to maintain the warranty
Inspections may be carried out by an authorised WALTER service centre or by yourself — provided that original parts and fluids are used and proof of purchase is retained.
3 year WALTER warranty
36 months after registration at waltercesko.cz
The warranty is provided by Walter Kompressortechnik Česko s.r.o. (Ostrava). Machine registration extends the warranty to 36 months from the date of purchase; proof of purchase is required to claim the warranty.
- Claim assessment within 14 working days, approved repairs free of charge and completed within 30 days
- After 4 repairs and a further defect, you are entitled to a replacement of the machine with a fault-free one
- You may perform the prescribed inspections yourself — using original parts and providing proof of purchase
Transport and Commissioning
The machine is delivered on a pallet. Before the first start, check the oil level, direction of rotation, and the tightness of connections; after the first 8 hours of operation, tighten the cylinder head bolts to a torque of 25 Nm. Leave the electrical connection to a professional — for three-phase machines, it is necessary to verify the correct phase sequence.
Related models and alternatives
Same three-cylinder unit with a 200 l tank: half the starts and a reserve in the recommended ratio.
View model →Vertical version of the same class — half the floor space requirement with the same delivery rate.
View model →One class lower with the same tank: 2.2 kW and 340 l/min for less demanding operations.
View model →Just the pump unit on a base frame, for when you already have a functional pressure vessel.
View model →Frequently asked questions
Why only 100 l for a 530 l/min intake?
Is 1,202 rpm still considered a slow-running machine?
Can it handle a pneumatic angle grinder?
How quickly does the tank fill?
Can it be moved between workstations?
Additional parameters
| Category: | Compressors for all applications - hobby and industrial |
|---|---|
| Warranty: | 3 years |
| EAN: | 5905122000103 |
| Compressor type: | Piston compressor |
| Pressure: | 10 bars |
| Suction power: | 530 l/min |
| Displacement: | 440 l/min |
| Pressure vessel volume: | 100 L |
| Design of pressure vessel: | Lying down |
| Connecting: | Quick coupling DN 7.2, Ball valve 1/2" |
| Motor power: | 3.0 kW |
| Mains voltage: | 400/50 V/Hz |
| Speeds: | 1,202 rpm |
| Number of cylinders: | 3 |
| Number of grades: | 1 – single-stage compressor |
| Lubrication: | Oleic |
| Noise: | 80dB(A) |
| Dimensions: | 1460 × 640 × 1150 mm |
| Weight: | 115 kg |
| Accessories: | Pressure regulator, Wheels, Handle, Quick coupler, Ball cock |
| Engine: | Electric |
| Soundproofed: | No |
| Drive: | V-belts |
| Air dryer: | No |
| Retrieved from: | Professional |
| Development: | Mobile |
| In stock: | External warehouse |
Demonstrace výkonu litinového pístového kompresoru GK530-30-200 🌟🔩
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