Cast iron piston compressor WK430-3-0/100AP power input 2.2 kW, suction capacity 420 l/min, pressure 10 bar, air tank 100 l, voltage 230/50 V/Hz
Code: WK430-3-0/100AP
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Product detailed description
WALTER WK430-3,0/100AP Cast Iron Piston Compressor - 100L, 230V
The WK430-3,0/100AP is the most balanced combination of all 5 WALTER series models that can be connected to a standard single-phase network. The all-cast iron 2V twin-cylinder unit has a power input of 2.2 kW, suction of 420 l/min, and an effective delivery of 340 l/min at 10 bar, with an operating speed of 1,276 rpm. The receiver is horizontal with a volume of 100 l, power supply 230 V / 50 Hz, noise level approx. 80 dB(A), and 3 years warranty after registration at waltercesko.cz.
A 100 l receiver on a single-phase motor is a compromise that makes sense: the reserve is sufficient to prevent the motor from cycling too frequently, while the machine still runs on a standard socket and fits in a garage. Those who do not have a three-phase connection in their workshop and want one machine for all common tasks usually find their solution here.
Configuration of this machine
Why choose this model
In a 230V machine, the starting current passes entirely through a single circuit, straining both the motor windings and the circuit breaker. A 100 l tank reduces the number of cycles to roughly half compared to the 50 l version — at a consumption of 150 l/min, from approximately 50 down to 25 starts per hour. This is the simplest way to extend the life of a single-phase machine and the only one that does not require electrical installation work.
The machine requires its own circuit with a slow-characteristic (Type C) circuit breaker. A socket shared with heating, a welder, or electric gates leads to the breaker tripping exactly when the compressor switches on. In a rented garage or workshop, this is the only thing worth verifying before ordering the machine.
A bleed valve relieves the cylinder head upon stopping, allowing the motor to start without back pressure in the discharge. The result is a lower starting current and less strain on the circuit breaker — for a 230V machine with dozens of cycles per day, this is the difference between trouble-free operation and a tripping breaker.
The cylinder liner is machinable and the rings are replaceable; head gaskets, valve plates, and V-belts are standard spare parts available from the importer in the CZ. Hobby machines are usually thrown away after wear and tear — this one is repaired.
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 WK430-3,0/100AP
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
The most common buyers are tradespeople or small workshops without a three-phase connection: garage auto services, home joineries, assembly companies, or gardening and agricultural operations. They require air daily, but in short bursts — blowing, inflating, ratchets, staplers, or occasional impact wrenches. Conversely, those planning continuous grinding or painting should note that the 2.2 kW single-phase class is insufficient for this, even with a 100 l tank.
Typical applications
- Blowing off and cleaning of parts, filters and workstations
- Tyre inflation and filling of pneumatic elements in garage services
- Staplers and nail guns for interior assembly
- Pneumatic 3/8" ratchet, drill and light-duty impact wrench
- Small-scale spraying of underbody and preservative materials
- Blowing out water pipes and winterising equipment
Where to choose a different model
At a consumption of 400 l/min, which is the upper limit for an impact wrench, a 100 l tank lasts approximately 3.3 minutes before the pressure drops. The WK430-3,0/200AP version, with the same pump and power supply, approximately doubles this duration.
View recommended model →The three-phase WK430-3,0/100P variant is mechanically the same machine, but without the requirement for a dedicated circuit and a slow-characteristic circuit breaker. If the connection can be provided, installation will be simpler and the machine will be gentler on the network.
View recommended model →The vertical VWK430-3,0/90AP is also 230 V, features a 90 l vertical tank and takes up approximately half the area of a horizontal machine. You will miss the remaining 10 l of reserves more easily than a square metre in the workshop.
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 — especially for single-phase machines: they require a dedicated circuit and a circuit breaker with a slow characteristic.
Related models and alternatives
The largest tank available in the 230 V range — double the reserve for peak demands.
View model →Identical configuration on 400 V, without the requirements for a dedicated circuit and a slow circuit breaker.
View model →Vertical 230 V version with a 90 l tank for workshops where floor space is limited.
View model →A smaller entry-level 230 V option if you only require air occasionally.
View model →Frequently asked questions
What are the electrical connection requirements?
Why 100 l instead of 50?
Why does my circuit breaker trip during painting?
Can I leave it running all day?
How do I know if my tank is large enough?
Additional parameters
| Category: | Compressors for all applications - hobby and industrial |
|---|---|
| Warranty: | 3 years |
| EAN: | 5905122000073 |
| Compressor type: | Piston compressor |
| Pressure: | 10 bars |
| Suction power: | 420 l/min |
| Displacement: | 340 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: | 2.2 kW |
| Mains voltage: | 230/50 V/Hz |
| Speeds: | 1,276 rpm |
| Number of cylinders: | 2 |
| Number of grades: | 1 – single-stage compressor |
| Lubrication: | Oleic |
| Noise: | 80dB(A) |
| Dimensions: | 1150 × 490 × 850 mm |
| Weight: | 86 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 GK420-22-100 💪🛠️
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