Cast iron WK1500 aggregate on base frame input power 7.5 kW, intake 1,400 l/min, pressure 10 bar, no air receiver, voltage 400/50 V/Hz

Product detailed description

WALTER WK1500P-PLATE cast-iron compressor unit on a base frame

WK1500P-PLATE is the most powerful standalone unit in the WALTER range. The 4V four-cylinder cast-iron design with a power input of 7.5 kW (10 HP) has an intake of 1,400 l/min, delivers 1,100 l/min to the distribution system at 10 bar, and runs at just 768 rpm. It is supplied on a base frame without a pressure vessel, with a 400 V / 50 Hz power supply, V-belt drive, noise level of approx. 80 dB(A), and a 3-year warranty upon registration at waltercesko.cz.

In the 7.5 kW class, a unit without a tank is often more practical than a complete machine – a full compressor with a 500 l tank is a bulky item that must be placed somewhere in the hall, whereas the unit and tank can be positioned separately. Another typical reason for purchase is the replacement of a worn-out unit on a large machine where the tank has a valid inspection and it makes no sense to discard it.

Configuration of this machine

• Cast-iron unit — 4V · 768 rpm · single-stage compression
• Unit on base frame — supply your own vessel
• Orientation set by your own tank
• Three-phase 400/50 V/Hz
• Standard pressure of 10 bar for common pneumatic tools

Why choose this model

Who is it for

It is the choice for industrial operations, assembly halls, sandblasting plants, or large metal fabrication shops building or reconstructing a central compressed air distribution system. It is purchased by companies that own or are acquiring a large pressure vessel and want the source in a compressor room, not in the middle of the workshop. The design of the pressure assembly and electrical installation is clearly a job for a professional – a 7.5 kW input is not something to guess at, and incorrect connection to the mains voids the warranty.

Typical applications

• Central compressed air source for an assembly hall or production plant
• Sandblasting and blasting with high continuous consumption
• Replacing the unit on a large compressor with a 500 l tank
• Compressor room with the pressure vessel located outside the production area
• Air network for three or more simultaneously operating outlets
• Source for equipment with high and irregular air consumption

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

What size tank do I need for this unit?

In this class, 500 l is the standard – just as with a complete machine on the same platform. A smaller tank would result in too many motor starts, and starts are the primary cause of wear in a piston compressor. The tank must have a valid inspection, a corresponding maximum pressure, and ports suitable for connecting the assembly.

What else do I need to arrange for the unit?

A pressure vessel with a valid inspection and ports suitable for connecting the assembly, a pressure switch, safety and non-return valves, a pressure regulator and outlet fittings, and a 400 V supply with fusing dimensioned according to the 7.5 kW power input. The scope of delivery will be confirmed by telephone – for assemblies of this size, the connection is always case-specific.

How is such a unit transported and installed?

This is a heavy item on a pallet; expect to use a forklift or a ramp – it cannot be moved by hand. Check the shipment before signing. Place the unit on a flat, rigid surface with sufficient space for cooling and service access, and ensure the connection to the tank is flexible, not a rigid pipe.

Do I need a dryer and filtration?

Neither a dryer nor filtration is included in the delivery. For a distribution system of this size, it is generally worthwhile – condensate in the piping damages tools and equipment, and significant amounts are produced at higher flow rates. The minimum requirement is regular, at least weekly, draining of condensate from your tank.

Can I feed one tank with two units?

Technically, this is a solution used in operations, but it requires a correctly designed pressure assembly with non-return valves, staggered switching pressures, and a tank dimensioned for the total output. Leave this to a compressed air distribution designer; improvisation on pressure equipment of this size is a risk.

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.