Cast iron piston compressor WK430-3-0/100P input power 2.2 kW, intake 420 l/min, pressure 10 bar, air receiver 100 l, voltage 400/50 V/Hz
Code: WK430-3-0/100P
Related products
Product detailed description
WALTER WK430-3,0/100P Cast-Iron Piston Compressor
The WK430-3,0/100P combines an entry-level 2.2 kW cast-iron unit with a 100 l horizontal tank. The 2V twin-cylinder draws in 420 l/min, delivers 340 l/min to the distribution system at 10 bar, and operates at 1,276 rpm. It is powered by a three-phase 400 V / 50 Hz supply, with noise levels of approximately 80 dB(A), and a 3-year warranty upon registration at waltercesko.cz.
The 100 l tank is the smallest size in this power class that prevents the motor from cycling constantly: at a continuous draw of 150 l/min, it results in approximately 25 starts per hour compared to 50 for the 50 l version. The 100 l capacity is just below the recommended tank-to-intake ratio (which for 420 l/min is 125 to 210 l) — in practice, this is a reasonably balanced platform configuration that won't take up unnecessary space in a small workshop.
Configuration of this machine
- Cast-iron unit — 2V · 1,276 rpm · single-stage compression
- Pressure vessel — 100 l · horizontal
- Horizontal design
- Three-phase 400/50 V/Hz
- Standard pressure of 10 bar for common pneumatic tools
Why choose this model
Half the number of starts compared to the 50 l version
With a difference of 2 bar between the cut-in and cut-out pressure, the 100 l tank delivers approximately 200 litres of free air per cycle. At a continuous draw of 150 l/min, this means roughly 25 starts per hour instead of 50 for the 50 l version. The service life of a piston compressor depends precisely on the number of starts, not on the total operating hours accrued.
A tank that approaches the recommended ratio from below
A general rule of thumb is 0.3 to 0.5 litres of tank capacity per 1 l/min of intake; for 420 l/min, this results in 125 to 210 l. The 100 l volume is therefore just below the range but sufficient in practice — unlike the 50 l volume, which is significantly below it. Those wishing to be within the recommended range should opt for the 200 l version.
Covers peak demand above machine output for 3.3 minutes
A 1/2" impact wrench can briefly draw up to 400 l/min, which is more than a machine with a 340 l/min output can produce. The 100 l tank compensates for this difference for approximately 3.3 minutes of continuous work before the pressure drops — compared to only 1.7 minutes for the 50 l version.
Three-phase motor without the need for a dedicated circuit
The 400 V version distributes the starting current across three phases, eliminating the need for a separate circuit and a slow-trip circuit breaker required by the single-phase WK430-3,0/100AP variant. If you have a three-phase connection in your workshop, this is the simpler path from an installation perspective.
Who is it for
This model is most commonly found in small metal fabrication shops, metalworking shops, or joineries that have a 400 V distribution board and a single workstation where compressed air is used. It is also suitable for smaller car repair shops where ratchets and impact wrenches are used in intervals of several minutes, allowing time for repressurisation. This is not a machine for two simultaneous workstations or continuous grinding — for such applications, a higher power class is required.
Typical applications
- Blow guns and cleaning of workpieces in metal fabrication
- Staplers, nailers and pneumatic drills in joinery
- 3/8" pneumatic ratchet and light impact wrench in a smaller garage
- Tyre inflation and pressure testing of small components
- Pneumatic clamping of simple fixtures
- Blow guns and mould cleaning in small-scale production
When to choose a different model
You require air continuously and for longer periods
With a 200 l tank on the same unit, the number of starts at a consumption of 150 l/min drops from approximately 25 to 13 per hour, and the tank covers peaks above the machine's delivery for more than 6 minutes instead of 3.3. At the cost of filling from zero taking 5.9 minutes instead of 2.9.
You continuously need more than 340 l/min
The 3.0 kW three-cylinder platform provides 440 l/min of effective delivery at a lower 1,202 rpm. With the same 100 l tank, it is the direct step up from this model if you lack power for a grinder or spray gun, rather than storage capacity.
You do not have a three-phase connection in your workshop
The WK430-3,0/100AP model is the same machine for standard 230 V. Allow for a dedicated circuit, a slow-characteristic circuit breaker, and a supply cable dimensioned according to the length.
What the figures tell you — calculated values
The values are calculated and are meant for comparing the models with each other, not as guaranteed figures.
Design and technology
Related models and alternatives
WK430-3,0/100AP
Same configuration for standard 230 V, for workshops without a three-phase connection.
WK430-3,0/200P
Same unit with a 200 l tank: half the starts and double the peak reserve.
VWK430-3,0/90P
Vertical variant of the same unit for workshops with limited floor space.
WK550-4,0/100P
A class higher with the same tank size: 3W three-cylinder, 440 l/min and lower 1,202 rpm.
Frequently asked questions
- Why is the intake rated at 420 l/min, but the delivery is only 340?
- Intake is the volume the unit draws in; delivery is what actually reaches the distribution system after losses in the compression chamber. The ratio for this platform is approximately 81%. Always size your tools according to the 340 l/min delivery; the intake mainly identifies the model – the number 430 in the name roughly corresponds to it.
- How long does it take to fill the 100 l tank?
- The calculation gives approximately 2.9 minutes from zero to 10 bar without consumption. In operation, however, the tank is only topped up by 2 bar from the cut-in to the cut-out pressure, which is a matter of tens of seconds. This is an isothermal estimate; actual filling time is usually slightly longer.
- Can it handle a spray gun for painting?
- Yes for minor repairs and small parts, but no for continuous painting. An HVLP spray gun consumes 250 to 400 l/min continuously, while the machine's delivery is 340 l/min — the 100 l reserve only covers a short interval, after which the machine will run continuously and pressure will still drop at the upper limit of the gun's consumption. For regular painting, a 3.0 or 4.0 kW class machine is appropriate.
- Is 100 l enough for two people in a workshop?
- No. A delivery of 340 l/min covers one tool with pauses; if two workstations operate simultaneously, the reserve will be depleted and both will have to wait for repressurisation. Sum up only the tools that will actually run simultaneously, add 30% for leaks in the distribution system, and choose the machine based on the result — for two outlets, this means moving up by at least two power classes.
- Does this machine need an air dryer?
- For a standard workshop using blow guns, ratchets, and staplers, no — weekly draining of condensate from the tank is sufficient. Add a dryer and filtration as separate units after the compressor outlet if you intend to paint or connect moisture-sensitive equipment. The machine is supplied without a dryer and without a noise-reducing cover.
The machine comes with a 3-year warranty after registration with the importer. Warranty terms, the maintenance schedule and a comparison of all 28 models are in the category WALTER cast-iron piston compressors.
Ventilek’s tip
The hundred-litre is the happy medium: the motor cuts in less often and it still fits in a corner. If in doubt, take this one.
Additional parameters
| Category: | Air compressors |
|---|---|
| Warranty: | 3 years |
| EAN: | 5905122000066 |
| Compressor type: | Piston compressor |
| Pressure: | 10 bars |
| Suction power: | 420 l/min |
| Air delivery: | 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: | 400/50 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 💪🛠️
Product rating
Be the first who will post an article to this item!
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:
- Screw compressors: we offer a wide range of screw compressors that are designed for maximum energy efficiency and long life. Ideal for high demanding industrial applications.
- Reciprocating compressors: these compressors are robust and reliable, suitable for smaller applications and workshops where high flexibility and low running costs are required.
- 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.
