Brand: CMC
Model: CPM 7.5-10/270
Condition: Used
Engine power: 5.5 kW (≈7.5 HP)
Maximum pressure: 10 bar
Tank: 270 litres
Indicated air flow rate: approximately 600 litres/min (data from original advertisement)
Power supply: 400 V / 3 ph / 50 Hz
Sound level: 64 dB(A) (in the distributor's advertisement)
Weight: about 175 kg
Dimensions: 1531 × 612 × 1394 mm
Timed condensate drain included
Certifications: complete with CE – separator tank – CE safety valve
System type: compressor with integrated tank, silenced
Continuous use (100% duty) quoted for similar models
Note: used to check the conditions of the drain, tank, pressure, engine status
If you're considering purchasing a used compressor, let me introduce you to this excellent opportunity: the used CMC CPM7.5-10/270 compressor is a machine that can deliver excellent performance if carefully selected. I repeat: CMC CPM7.5-10/270 , CMC CPM7.5-10/270 , CMC CPM7.5-10/270 —and I'll try to explain why it's worth it, what it's made of, and what to check.
The CMC CPM7.5-10/270 compressor is a compact industrial unit mounted on a 270-liter tank. Visually, you'll notice the motor body, the compressor section, the cylindrical tank, any protective panels, the timed condensate drain, and the data plate showing the power and operating pressure. Since it's used, it's normal to find signs of use: slightly faded paint, some scratches or marks on the steel, residual dust or moisture. But the important thing is that the critical parts—motor, tank, safety valve, drain—are functional and certified.
Here's how the CMC CPM7.5-10/270 is made and what components it contains:
Three-phase electric motor of 5.5 kW (approximately 7.5 HP) powered by 400 V/3Ph/50Hz: provides the necessary power to the compressor head.
Compressor head (mechanical part of air compression) connected to the engine, with adequate technology to reach 10 bar of maximum pressure.
storage tank , which allows pressure stabilisation and compressed air storage.
Timed condensate drain : An important component for removing moisture from the tank and maintaining air quality and system reliability.
Safety valve, oil/air separator and air filter : ensure safety, quality of the air delivered and system protection.
Protective panels and silencer : given the noise level of approximately 64 dB(A), the machine is designed for a working environment with low noise levels compared to larger equipment.
Electrical panel and controls : start button, pressure switch, pressure gauge, switches, possible Star-Delta start if provided.
Air outlet pipes and connections : to connect the downstream pneumatic system.
Base or support feet : for a stable installation, which must contain vibrations and guarantee durability.
The machine measures approximately 1,531 × 612 × 1,394 mm (length × width × height). The tank has a capacity of 270 liters. The maximum operating pressure is 10 bar (≈145 psi). The flow rate of approximately 600 l/min (advertised data) means the compressor is suitable for powering medium-sized tools or pneumatic systems. Its weight of 175 kg makes it relatively easy to handle for an industrial machine, but it still requires proper flooring and fixing. Since it is used, it is important to check the condition of the tank (no corrosion, any leak tests), the safety valve, and the motor.
For optimal use of the CMC CPM7,5-10/270 compressor you can consider some useful formulas:
Energy consumed (in kW h) = Motor power × operating time (h) × load factor.
If a 5.5 kW motor operates at 80% for 7 h: E = 5.5 × 0.8 × 7 ≈ 30.8 kWh.
Theoretical air production : Flow rate (+ tank) = approximately 600 l/min = 0.6 m³/min → 36 m³/h (if working continuously).
Accumulation ratio (tank) : Tank volume/flow rate = 270 l / (600 l/min) = 0.45 min ≈ 27 s. This gives an idea of the air buffer available before the pressure drops significantly.
Pressure drop per volume of air : If you consume air rapidly and the tank does not refill, Δp = (Q × t) / V tank (simplified) can help you estimate how long you can operate before the engine needs to be activated again.
Compressed air cost : you can estimate the cost per m³ as (electrical power (kW) × cost kWh) / hourly production (m³/h).
With these formulas you can estimate whether the CMC CPM7,5-10/270 compressor is suitable for your compressed air cycle, calculate how much it costs to use it, how much buffer you have with the 270 l tank, and check whether the 10 bar pressure is sufficient for your application.
While not intended to "process materials" like a tool, the CMC CPM7.5-10/270 compressor is used to power pneumatic systems: pistons, tools, and machines requiring compressed air up to 10 bar. It can power, for example, small pneumatic parts, riveting machines, punching machines, painting machines, blowing systems, control devices, etc. Typically used in workshops, laboratories, and small-to-medium production facilities, where stable air and pressure up to 10 bar are required.
Here's how to use the used CMC CPM7.5-10/270 compressor:
Check that the installation is correct: tank securely fastened, base level, 400V/3f/50Hz power supply correctly connected, earthing present.
Preliminary check: compressor oil level (if lubricated), drain any residual condensation from the tank, check that the safety valve is working, that the pressure switch is calibrated for 10 bar.
Start the engine: the pressure switch should bring the engine up to 10 bar; the tank will collect air.
Connect the compressed air line: make sure the piping is sized correctly to avoid excessive pressure drops.
Check operation under load: activate a tool or pneumatic piston and observe whether the pressure holds at 10 bar, and whether the motor is not overloaded (absorption, noise).
During use: monitor oil level, compressor temperature, condensate drain – important for air quality and durability.
After use: turn off the engine, release residual pressure from the line if necessary, perform daily maintenance: drain condensation, clean the air filter.
The CMC CPM7,5-10/270 compressor can be combined with accessories such as:
Dryer (compressed air dryer) to remove humidity and ensure dry air.
Oil/air filter and condensate separator for improved air quality.
Monitoring and control system (digital pressure gauge, pressure recorder, machine hour clock).
Additional silencer if noise sensitive environment.
Additional tank for greater air storage.
Check valves, automatic drains, high-quality pipes.
Remote control panel or automatic start depending on the load.
To evaluate whether the used CMC CPM7.5-10/270 compressor is a good deal:
Check working hours and maintenance history: fewer hours and regular maintenance = better.
Tank: check the construction date, presence of CE certification on the tank, any pressure tests, internal corrosion.
Safety valve and condensate drain: must be functioning correctly.
Engine and compressor: Check for excessive vibration, strange noises, oil or air leaks.
Oil level and air filter condition: if the filters are new or well-maintained, it's a positive sign.
Air lines and gaskets: check for leaks.
Verify that the declared pressure of 10 bar is actually reached and maintained under load.
Check CE documentation: on the tank, "CE safety valve", "CE certificate", as indicated in the advertisement.
Paint condition, previous working environment: if used in harsh conditions (humidity, dust), it requires more maintenance.
If all these aspects are met, you have a good used compressor.
If the used compressor does not clearly have the CE marking or complete documentation, you need to check:
Tank: must comply with the Pressure Equipment Directive (PED 2014/68/EU) and have an appropriate plate.
Safety valve correctly calibrated and maintained.
Electrical system in compliance with machinery/electrical system regulations (e.g. CEI in Italy).
Tank mounting and brackets: must be stable and compliant.
Use and maintenance instructions available.
Safety signs (pressure, compressed air hazard) are present.
If anything is missing, it may need to be updated before use.
CMC is a well-known manufacturer of industrial compressors; with a range of models and power ratings, it offers solutions with tanks, filters, dryers, and accessories. Buying a used CMC compressor means owning a machine from a recognized brand, with spare parts and technical support available.
The CMC CPM7,5-10/270 compressor is used in various industrial sectors:
Mechanical workshops and maintenance: to power pneumatic tools, riveters, pneumatic drills.
Painting and bodywork: compressed air for paint guns, blowing.
Medium industrial production: power supply for pneumatic lines, automatic machines.
Laboratories and inspection centers: where stable air at 10 bar is needed.
Small to medium-sized companies that want an industrial compressor without investing in high-powered machines.
Buying a used CMC CPM7.5-10/270 is convenient because:
The power of 5.5 kW/7.5 HP with a 270 litre tank and 10 bar pressure is already a very valid combination for many applications.
The purchase cost of a used one is much lower than a similar new model.
If the machine has been well maintained, it can give many more years of service.
Reduce your initial investment and you can reinvest in accessories or air conditioning.
It's a quick deal: used items are often immediately available.
The CMC brand ensures spare parts and support, making used a sensible choice.
CMC Compressor Model CPM7,5-10/270 X 10BAR ON 270 LT TANK Condition New With Timed Condensate Drain Power 7.5 HP Motor 5.5 kw Pressure 10 bar FAD 600 lt/min Power supply 400/3/50 V/Ph/Hz SDS Start Silenced 64 dB(A) Weight and dimensions kg 175 -1531x612x1394mm Complete with: CE Certificate - User manual - CE separator tank - CE safety valve
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