Piston Compressor СБ4/C-270 LB75 (AirCast / Remeza), Belt Drive, Cast-Iron Block, 270 l Receiver

1. Purpose and Operating Principle

The belt drive (instead of a direct coaxial drive) reduces vibration and noise on the frame, while the large flywheel on the shaft also acts as a fan, intensively cooling the cylinder fins and lowering the risk of overheating during prolonged operation.

2. Technical Specifications

⚠️ Unconfirmed parameters (not stated in the public part of the product page — clarify with a manager if needed):

• Compressor weight.

• Crankshaft speed (rpm) and noise level, dB(A).

• Grade and volume of compressor oil filled at the factory.

3. Design Features

Model designation breakdown:

Design solutions:

• Cast-iron LB75 pump block — high heat dissipation thanks to the cast-iron cylinder and developed cooling fins, greater wear resistance than aluminium counterparts.

• Belt drive instead of direct coaxial drive — lower frame vibration and noise at the same power.

• Large flywheel on the shaft acts as a fan, cooling the cylinders and reducing the risk of overheating under intensive duty.

• The 270 l receiver combined with high pumping speed smooths peak loads without frequent motor start/stop cycles.

• Serviceable design — piston rings, valve plates, gaskets and bearings for AirCast blocks are widely available on the CIS and Moldovan markets.

4. Installation Recommendations

• Connection requires a three-phase 380 V supply with a protective circuit breaker rated for the starting current of the 5.5 kW motor — a single-phase 220 V network is not suitable for this model.

• Install on a level base with sufficient space around the flywheel and cylinders for free cooling-air flow — the flywheel acts as a fan and its airflow must not be blocked by nearby walls or equipment.

• Outlet connection 1/2″ — when connecting, clarify the fitting thread type (parallel BSPP or tapered BSPT) and choose sealing accordingly: flat gasket for BSPP, PTFE tape for BSPT.

• After the first 50–100 operating hours perform the first oil change, then every 500 operating hours.

• Drain condensate from the 270 l receiver daily — moisture accumulation leads to receiver corrosion and water entering the pneumatic network.

• Regularly check belt tension — a slack belt reduces output and accelerates its own wear.

5. Equivalents and Comparison

Within the AirCast/Remeza range (same belt-drive series, cast-iron blocks):

Exact cross-reference part numbers to other brands (Abac, Fiac, Fini, etc.) are not given on the product page — when selecting a replacement of another brand, match output capacity, maximum pressure and receiver volume, and confirm specific equivalence from the chosen model’s data sheet.

6. Common Mistakes

• Attempting to connect the compressor to a single-phase 220 V network — the model is designed only for three-phase 380 V supply.

• Omitting daily condensate drainage from the receiver — receiver corrosion and water in the air line over time.

• Postponing the first oil change beyond the recommended 50–100 operating hours — accelerated pump-block wear during the running-in period.

• Installing the compressor tight against a wall or equipment on the flywheel side — restricted cylinder cooling and risk of overheating during prolonged operation.

• Ignoring belt tension — loss of output and premature belt failure.

7. Applications

The СБ4/C-270 LB75 compressor is used where a stable supply of a large volume of compressed air is required by medium and large enterprises: auto workshops and tyre services, professional paint shops (pneumatic spray guns and sanding tools), furniture production and assembly (edge processing, sanding, preparation for painting, including CNC lines), construction and finishing work, woodworking and small industrial plants.

8. Expert Opinion

“AirCast СБ4/C-270 LB75 is one of the most balanced models in its class. The cast-iron LB75 block together with the 270-litre receiver handles auto-service and paint-shop duties very well, and the serviceability of this line removes dependence on a single spare-parts supplier,” notes Vitali Boluchevski, Lead Engineer, Acvatron SRL, 18 years of experience.

9. FAQ

What is the real output capacity of the compressor?
Intake capacity is 950 l/min; real output capacity at about 8 bar is roughly 740–880 l/min depending on operating conditions.

Can this compressor be used from an ordinary 220 V socket?
No, the model requires three-phase 380 V supply; for a single-phase network other models in the range with a 220 V motor should be considered.

How often does the compressor need servicing?
First oil change after 50–100 operating hours, then every 500 operating hours; in addition it is recommended to drain condensate from the receiver daily and periodically check belt tension.

What tasks is a 270-litre receiver suitable for?
Smoothing peak loads at medium and large sites — auto workshops, paint shops, furniture production — where air demand is uneven and it is important to avoid frequent motor start/stop cycles.