Cast iron piston compressor HWK1200-10/500P-15P input power 7.5 kW, intake 1,060 l/min, pressure 15 bar, air receiver 500 l, voltage 400/50 V/Hz

Product detailed description

WALTER HWK1200-10/500P-15P High-Pressure Cast-Iron Piston Compressor – 15 bar

The HWK1200-10/500P-15P achieves the highest pressure in the entire WALTER range – 15 bar. The 4V four-cylinder cast-iron unit with a power input of 7.5 kW (10 HP) has an intake of 1,060 l/min and delivers 900 l/min to the distribution system at 15 bar. At the same time, it has the lowest RPM of all 28 models – 688 rpm. 500 l tank, power supply 400 V / 50 Hz, noise level approx. 80 dB(A). The machine comes with a 3-year warranty after registration at waltercesko.cz.

The combination of 15 bar and a delivery rate of 900 l/min is unique in the range and is aimed at operations where high pressure is a production requirement, not just a safety margin. If your equipment tops out at 13 bar, the HWK1200-10/500P version provides 60 l/min more. If you only need a high volume of air at 10 bar, the WK1500-10/500P is the right choice.

Configuration of this machine

• Cast-iron unit — 4V · 688 rpm · single-stage compression
• Pressure vessel — 500 l · horizontal
• Horizontal design
• Three-phase 400/50 V/Hz
• High-pressure version — 15 bar — for applications requiring more than 10 bar

Why choose this model

Who is it for

This machine is designed for production facilities or testing laboratories where 15 bar is a technical requirement: production and testing of pressure components, hydraulic and pneumatic elements, lines with presses and forming tools, and pressure testing of larger assemblies. It is purchased by companies that have piping, fittings, and regulators rated for over 10 bar and know exactly what pressure their equipment operates at. For a workshop with standard tools, this machine is unnecessarily oversized.

Typical applications

• Pressure and leak testing of assemblies and piping up to 15 bar
• Testing laboratories for hydraulic and pneumatic components
• Production lines with pneumatic presses and forming tools
• Equipment operating at 13 bar that requires a reserve above the operating pressure
• Extensive piping networks with high pressure losses
• Simultaneous operation of several outlets where a large reserve is necessary for peak loads

Where to choose a different model

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

Frequently asked questions

Is the entire air network in the hall prepared for 15 bar?

Verify this before installation. Everything between the compressor and the regulation station – piping, valves, hoses, filters, quick couplers, shut-off valves – must be sized for the full tank pressure, not the operating pressure you use. Beyond the pressure reducing valve, components rated for the set value are sufficient. Standard workshop equipment is often only supplied for up to 10 bar.

Why does the machine with the highest pressure have the lowest RPM?

Higher pressure means higher stress on the compression chamber; structurally, this is compensated for by slowing down the unit rather than increasing its speed. Therefore, RPM decreases across the entire range as pressure increases: 768 rpm at 10 bar, 725 at 13 bar, and 688 at 15 bar. A side effect is the shortest piston ring sliding path in the entire range.

How long does it take to pressurise a 500 l tank to 15 bar?

The calculation gives approximately 8.3 minutes from zero without consumption; real filling times tend to be slightly longer. Among the machines with a 500 l tank this is the longest time, but simply because the tank holds the most air in the whole range – in operation, it only repressurises between the cut-in and cut-out pressures.

Can I power standard pneumatic tools from it?

Yes, via a pressure reducing valve set to the tool's required pressure. Conversely, for tools, this is the most stable source in the entire range – the network pressure practically does not fluctuate because the reserve in the tank is huge relative to the working value. Just remember that components upstream of the regulator must withstand 15 bar.

Does the high-pressure machine follow the same service schedule?

Yes, the schedule is identical for the entire range: tighten cylinder head bolts to 25 Nm after the first 8 hours, daily oil and connection checks, weekly condensate drainage, monthly filter cleaning, the first oil change after 100 hours, and then at least once every six months. Compliance is even more critical in high-pressure operations.

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.