Product Description

Kupczyk Piston Oil Compressor – Model KK 740/270

Higher Power and Performance for Professionals – Durability, 270-Liter Capacity, and 450 l/min Effective Output

Piston compressors from the Polish brand Kupczyk are a guarantee of quality and reliability. Over 30 years of experience in compressor sales has enabled the creation of a product line offering exceptional value for money. The KK 740/270 model is a higher-output variant from the esteemed KK series, engineered for larger automotive workshops, tire service centers, and manufacturing plants requiring a substantial compressed air buffer to power multiple tools simultaneously.

Why Choose the KK 740/270 Model?

Real Benefits in Daily Operation:

• 450 l/min Effective Output: High delivery performance ensuring smooth, uninterrupted operation even with high-demand pneumatic tools.

• Powerful 4.0 kW (5.5 HP) Motor: Ample power reserve for the most demanding industrial and workshop applications.

• 270-Liter Receiver Tank: Large buffer capacity allowing longer work cycles without frequent motor restarts.

• Low-Speed K-740 Pump (1000 rpm): Reduced pump speed translates directly to extended service life, slower component wear, and quieter, cooler operation.

• 10 bar Maximum Pressure: Versatile working pressure suitable for a wide range of workshop tasks.

Technical Specifications

• Power Supply: 400 V ~ 50 Hz

• Tank Capacity: 270 liters

• Compressor Speed: 1000 rpm

• Number of Cylinders: 2

• Compression Stages: 1

• Noise Level: 96 dB(A)

• Theoretical Displacement: 740 l/min (44.4 m³/h)

• Effective Output: 450 l/min (27.0 m³/h)

• Maximum Pressure: 10 bar

• Motor Power: 4.0 kW (5.5 HP)

• Rated Current: 9.2 A

• Lubrication: Oil-lubricated

• Total Weight: 195 kg

• Dimensions: 1500 x 535 x 1060 mm

Technical Documentation & Compliance

When purchasing a Kupczyk compressor, you receive a full documentation package required for equipment registration and regulatory compliance.

Package includes:

• Declaration of Conformity

• Pressure Vessel Certificate with technical drawing (compliant with Directive 2014/68/EU)

• Safety Valve Certificate

• User Manual

Rugged Construction – Built for Years of Service

This heavy-duty two-cylinder oil-lubricated piston pump is engineered for reliable, continuous operation under heavy loads. Key construction features include:

• Cast Iron Cylinders: Outstanding wear resistance for extended durability.

• Side Air Cooler: Efficiently lowers compressed air temperature before it enters the tank.

• Aluminum Alloy Pistons: Precision-fitted for optimal performance.

• Stainless Steel Valves: Designed for long-term operational life.

• Large Pulley: Provides maximum airflow and cooling across the pump unit.

• Low-Speed Kupczyk K-740 Pump: Reduces vibration and noise levels.

• Protective Metal Guard: Ensures operator safety during operation.

• Oil Sight Glass: Allows quick and effortless daily oil level checks.

Complete Equipment – Ready to Work

The compressor is delivered as a complete, fully equipped unit ready for installation:

• Pressure Switch (Presostat): Features an unloader valve for easier motor startup and integrated thermal overload protection.

• Certified Safety Valve: Ensures safe operating pressure limits.

• Non-Return Check Valve: Prevents backflow from the receiver.

• Pressure Regulator: Equipped with a pressure gauge for precise output regulation and two quick-connect couplings.

270-Liter Receiver Tank – Stability and Safety

The heavy-duty pressure tank is powder-coated, corrosion-protected, and hydraulic pressure tested to 16.5 bar. It features:

• Condensate Drain Valve: Easily accessible for routine moisture drainage.

• Transport Handle: Facilitates positioning and maneuvering.

• Solid Mounting Base: Features anchoring points for maximum stability during operation.

Ideal Applications

The KK 740/270 model is the perfect choice for:

• Medium to large automotive repair garages and body/paint shops

• Woodworking, furniture making, and metal fabrication workshops

• Supplying centralized compressed air lines and driving multiple workstations simultaneously

Why Professionals Choose Kupczyk

Mechanics and industrial technicians across Europe choose Kupczyk equipment for its core strengths:

• Uncompromising reliability under heavy daily workloads

• Durable, field-tested engineering

• Full availability of spare parts and technical service support

• Outstanding balance of build quality and technical performance

Frequently Asked Questions (FAQ)

How does the KK 740/270 differ from the KK 520/200 model?

The KK 740/270 delivers significantly higher effective output (450 l/min vs. 315 l/min), a more powerful motor (4.0 kW vs. 3.0 kW), and a larger receiver tank (270 L vs. 200 L). It is specifically engineered for facilities with greater compressed air demands.

Does this machine require a 3-phase power supply?

Yes, the compressor operates on a 400 V three-phase power supply.

What documentation is provided with the compressor?

The unit comes with a full technical documentation kit, including vessel inspection certificates, safety valve compliance certificates, and a complete operator manual.

Which oil should be used and how often should it be changed?

We recommend using dedicated Kupczyk® piston compressor oil. Oil changes should be performed every 300–500 operating hours or at least once a year.

Invest in a Proven Workhorse

Choosing the Kupczyk KK 740/270 compressor means investing in high-performance, dependable equipment built for demanding tasks. It delivers stable air supply to your pneumatic tools, top-tier manufacturing quality, and full compliance with international safety standards.