Cast iron piston compressor HWK1200-10/500P input power 7.5 kW, intake 1,120 l/min, pressure 13 bar, air receiver 500 l, voltage 400/50 V/Hz

Product detailed description

WALTER HWK1200-10/500P High-Pressure Cast-Iron Piston Compressor - 13 bar

The HWK1200-10/500P is the industrial high-pressure version of the most powerful WALTER platform. The 4V four-cylinder cast-iron unit with a power input of 7.5 kW (10 HP) has an intake of 1,120 l/min and delivers 960 l/min to the distribution line at a pressure of 13 bar. Speed 725 rpm, horizontal tank 500 l, power supply 400 V / 50 Hz, noise level approx. 80 dB(A), 3-year warranty after registration at waltercesko.cz.

High pressure and high flow rates are combined in only two machines in the range – this one and its 15 bar version. It is suitable for operations with a central distribution system containing at least one piece of equipment operating above 10 bar – the rest of the tools can then simply be adjusted via a regulator. Those who do not require high pressure can get 140 l/min more with the ten-bar WK1500-10/500P.

Configuration of this machine

• Cast-iron unit — 4V · 725 rpm · single-stage compression
• Pressure vessel — 500 l · horizontal
• Horizontal design
• Three-phase 400/50 V/Hz
• High-pressure version — 13 bar — for applications requiring more than 10 bar

Why choose this model

Who is it for

Designed for engineering and production halls with a central distribution system, where equipment requiring a prescribed pressure of over 10 bar operates alongside standard tools — presses, forming tools, test labs, diaphragm pumps, and certain sandblasting applications. The delivery rate of 960 l/min covers several outlets simultaneously, so you do not have to choose between a "workshop machine" and a "machine for process equipment" — this unit manages both from a single distribution line.

Typical applications

• Central air network in a hall with at least one piece of equipment operating at 12–13 bar
• Pneumatic presses, riveting lines, and forming tools
• Pressure and leak tests for larger assemblies up to 13 bar
• Sandblasting and blasting with higher working pressure
• Concurrent operation of several workstations using standard tools via pressure-reducing valves
• Feeding long piped air networks where pressure loss occurs over the distance

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

Why is the model named HWK1200 when the intake is 1,120 l/min?

For high-pressure HWK models, the number in the code is a nominal designation, not an actual parameter – this also applies to the smaller HWK700, which has an intake of 600 l/min. Please refer to the intake value of 1,120 l/min and the effective delivery of 960 l/min. For the same historical reason, the product URL contains the designation hwk1500.

Can the machine power both 13 bar equipment and standard tools simultaneously?

Yes, and this is its typical application. The tank maintains full pressure; you connect the equipment directly and other outlets via pressure regulators set to 6 to 8 bar. Simply sum your actual simultaneous continuous demands and compare them with 960 l/min – short-term peaks are balanced by the 500 l tank reserve.

How long does it take to fill a 500 l tank to 13 bar?

The calculation gives approximately 6.8 minutes from zero without consumption; actual filling time is usually slightly longer. A more interesting figure is how rarely the motor switches on during operation – at full pressure, the tank holds a reserve of about 2,500 l of free air above an eight-bar air network.

What are the electrical installation requirements?

It is a three-phase machine, 400 V / 50 Hz, with a power input of 7.5 kW. The supply and fusing are dimensioned according to the instructions in the machine manual and the cable length; always leave the installation to a qualified electrician. Incorrect connection to the mains is one of the reasons for the voiding of the warranty, so it is not worth guessing.

Does such a machine require an air dryer?

Neither a dryer nor filtration is included in the delivery. For equipment sensitive to moisture – pneumatic valves, painting, measuring and testing circuits – add these as separate units after the compressor outlet. For a 500 l tank, always ensure condensate is drained at least once a week.

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.