Piston Compressor AirCast СБ4/C-50 LB30A Remeza

1. Purpose and Operating Principle

The compressor operates on the classic reciprocating compression principle: the crankshaft, via a belt drive, moves the pistons in the cast-iron cylinders of the LB30 block; air is compressed and stored in the receiver, from which it is supplied to the consumer through the 1/2″ outlet connection. The rated capacity of the pump block (intake, without volumetric losses) is approximately 420 l/min, while the real output capacity is 340 l/min — this is the figure that should be used when selecting air tools.

2. Technical Specifications

Note: in the LB30A series (including the СБ4/C-100 LB30A) single-phase 220 V versions are the most common on the Moldovan market. Check the motor nameplate before installation.

3. Design Features

1. Cast-iron cylinder of the LB30 block. Cast iron has higher heat dissipation and wear resistance than aluminium counterparts — developed cooling fins allow the block to run longer without overheating.

2. Lower speed thanks to the belt drive. The belt transmission reduces crankshaft speed relative to the electric motor, increasing the service life of bearings and the valve gear.

3. Massive flywheel as a cooling fan. During operation the flywheel intensively cools the cylinders, providing additional cooling of the block.

4. Vibration resistance. The massive frame and high-quality flywheel balancing reduce vibration levels under full load.

5. High serviceability. Unlike domestic “disposable” compressors, piston rings, gaskets, valve plates and bearings for AirCast blocks are always available — one of the reasons for the popularity of the line on the CIS market.

4. Installation Recommendations

• Before connection clarify the actual electrical configuration of your specific delivery (single-phase 220 V or three-phase 380 V) — do not rely on conflicting website data; contact us or check the motor nameplate.

• Ensure free space around the flywheel for proper cooling of the block — installing the compressor tight against a wall or in a confined niche reduces cooling efficiency and may lead to overheating under prolonged load.

• Fill the pump-block crankcase with oil before the first start (if the compressor is supplied without oil) — dry running even for a short time damages the cylinder-piston group.

• Regularly drain condensate from the receiver — moisture accumulation causes internal corrosion and shortens receiver life.

• Check belt tension according to the schedule — a slack belt reduces real output and accelerates its own wear.

• Take breaks under prolonged load (painting, sandblasting) — despite effective flywheel cooling, continuous intensive operation requires rest periods to prevent overheating of the piston group.

5. Equivalents and Comparison

AirCast СБ4/C-50 LB30A belongs to the same line as models СБ4/C-100 LB24A and СБ4/C-50 LB24A (also Remeza) — at a comparable power of 2.2 kW these models deliver lower output (230 l/min versus 340 l/min for the LB30A thanks to the more productive LB30 block).

When choosing between models of the AirCast line or comparable equivalents from other manufacturers, pay attention to:

• real output capacity (not the rated “intake” capacity of the block);

• receiver volume relative to capacity — the higher the capacity at the same receiver volume, the faster the compressor recovers pressure under peak loads, but the more often the motor starts;

• block material (cast iron versus aluminium) — AirCast cast-iron blocks are designed for more intensive professional use;

• spare-parts availability — one of the main advantages of the AirCast/Remeza line on the Moldovan and CIS markets in general.

If you need help choosing between models of the line for a specific task (painting, tyre service, sandblasting), describe the operating conditions to us — we will help select the optimal combination of capacity and receiver volume.

6. Common Operating Mistakes

• Continuous running without breaks on energy-intensive tasks (painting, sandblasting) — even with effective flywheel cooling the piston group overheats during long uninterrupted work.

• Installation in a confined space without ventilation — blocks flywheel airflow and reduces cooling efficiency of the block.

• Skipping condensate drainage from the receiver — leads to internal corrosion and shortens receiver life.

• Connection without checking the actual electrical configuration — mismatch of expected voltage/phases can result in incorrect motor operation or damage.

• Ignoring belt tension — a slack belt slips, reducing real output and accelerating its own wear.

7. Applications

The AirCast СБ4/C-50 LB30A compressor is in demand in the following areas:

• Auto workshops and service stations — supply of impact wrenches (including powerful models), tyre-fitting machines, pneumatic jacks.

• Professional painting — HVLP and LVLP spray guns, airbrushing, priming with stable pressure without drops during prolonged work.

• Construction and repair — light and medium demolition hammers and concrete breakers, orbital and belt pneumatic sanders, local sandblasting (discs, small parts).

• Small-scale production — furniture manufacture (pneumatic staplers, clamps, drilling machines), woodworking (sawdust blow-off, pneumatic actuators), packaging lines.

8. Expert Opinion

Vitali Boluchevski, Lead Engineer, Acvatron SRL (18 years of experience):

“AirCast СБ4/C-50 LB30A is a classic ‘workhorse’ for a medium auto workshop or paint shop: the LB30 block gives a solid capacity reserve with a relatively small receiver, so the compressor quickly recovers pressure between cycles. The main practical advantage of the AirCast line on our market is spare-parts availability: rings, valve plates and gaskets for Remeza blocks can be found in almost any specialist shop, unlike disposable domestic compressors. I strongly recommend clarifying the actual electrical configuration before ordering and installation — block characteristics may differ depending on the motor configuration, and for long painting or sandblasting jobs allow cooling breaks.”

9. Frequently Asked Questions

1. What is the real capacity of the compressor — 420 or 340 l/min?
Real output capacity is 340 l/min. The 420 l/min figure is the calculated capacity of the pump block without volumetric losses; 340 l/min is the value that should be used when selecting air tools.

2. What is the supply voltage of this model — 220 V or 380 V?
⚠️ The exact electrical configuration needs clarification — contact us or check the motor nameplate before ordering to avoid a mismatch with your network. In Moldovan market practice the 220 V versions of the LB30A series are the most common.

3. Is a 50 l receiver enough for painting a whole car?
For local painting of individual parts and steady operation of HVLP/LVLP guns the volume and capacity are sufficient. For prolonged continuous painting of large surfaces we recommend cooling and pressure-recovery breaks.

4. Can a sandblasting unit be connected to this compressor?
Yes, for local sandblasting of small parts (discs, small elements, rust removal) the capacity is adequate. For large-scale sandblasting of large surfaces a higher-capacity compressor will be required.

5. How many air tools can be connected simultaneously?
At 340 l/min the compressor comfortably supports simultaneous operation of 2–3 small consumers or one powerful tool (e.g. an impact wrench).

6. Why is the block cast iron rather than aluminium — what is the difference?
Cast iron has higher heat dissipation and wear resistance, making the block more suitable for intensive professional use than the light aluminium blocks more often found on domestic models.