4V-1.05/12.5
Piston Compressor 7.5 kW, 12.5 bar, 1050 l/min — 300 L Receiver, 4-Cylinder V-Block, 2-Stage Compression
The 4V-1.05/12.5 is a professional oil-lubricated piston compressor with a 4-cylinder V-block and 2-stage compression for applications where standard 8–10 bar pressure is not sufficient. With 7.5 kW of power, 1050 l/min delivery, 12.5 bar working pressure and a 300-litre receiver, it delivers stable, continuous compressed air supply for industrial facilities, large auto repair shops, truck tyre services and sandblasting workshops.
Technical Specifications — 4V-1.05/12.5
| Type | Oil-lubricated piston compressor |
| Block configuration | 4V — 4-cylinder V-block |
| Compression type | 2-stage |
| Power (kW) | 7.5 |
| Working pressure (bar) | 12.5 |
| Air delivery (l/min) | 1050 |
| Receiver volume (L) | 300 |
| Drive type | Belt drive |
| Cylinder liner material | Cast iron |
| Outlet connection | 1/2 inch |
| Dimensions L × W × H (mm) | 1530 × 600 × 1200 |
| Brand | MZB Compressor |
Design Features: Why the 4V-1.05/12.5 Outperforms Standard Models
4-Cylinder V-Block — over 1 cubic metre per minute
The V-configuration of 4 cylinders provides optimal balance and achieves a delivery rate of 1050 l/min at 7.5 kW. This layout distributes load evenly across the crankshaft, reduces vibration and ensures rapid pressure build-up even when multiple consumers are connected simultaneously.
2-Stage Compression — efficiency at high pressure
At 12.5 bar, single-stage compressors overheat significantly and lose efficiency. In the 4V-1.05/12.5, air is compressed in stages: the first pair of cylinders creates intermediate pressure, the air is cooled, and then the second pair brings it to the working pressure of 12.5 bar. This reduces discharge temperature and extends the service life of the oil and piston assembly.
300-Litre Receiver — air reserve for peak loads
The 300 L receiver acts as a powerful buffer: it absorbs peak loads when multiple pneumatic tools start simultaneously, allows the motor to rest between compression cycles and smooths pressure pulsations in the pipeline. This is especially important during sandblasting and pneumatic press operation.
Cast-Iron Cylinder Liners and Reinforced Crankshaft
Cast iron provides a significantly longer service life compared to aluminium alternatives. With proper maintenance, the compressor is designed for years of intensive use without major overhauls. The reinforced crankshaft and connecting rods withstand the stresses of multi-shift operation without deformation.
Pulley-Fan Cooling
The integrated fan on the belt pulley blows air over the finned cylinder surfaces with every revolution, providing effective heat dissipation even under prolonged loads. This prevents oil overheating and premature piston ring wear.
Applications for the 4V-1.05/12.5 Compressor
Truck Tyre Service and Heavy Machinery
The tyres of heavy goods vehicles, quarry, construction and agricultural machinery require pressure above the standard 8–10 bar. The 4V-1.05/12.5 provides the necessary 12.5 bar for fast and complete inflation of large-diameter wheels.
Industrial Sandblasting
The combination of 1050 l/min delivery and 12.5 bar pressure enables effective removal of deep corrosion, scale and old coatings from metal structures, bridges and industrial equipment. Ample air reserves prevent the sandblasting unit from “running out of breath” during extended operation.
Pneumatic Presses and CNC Machines
Laser and plasma systems, presses, pneumatic clamps and manipulators require stable, high inlet pressure. Pressure drops below the working level cause defects and production stoppages. The 4V-1.05/12.5 maintains stable 12.5 bar pressure for reliable industrial equipment operation.
Construction and Road Works
Heavy pneumatic jackhammers, drilling equipment and cable jetting systems require significant air consumption at high pressure. The 1050 l/min delivery rate supports several pieces of equipment running simultaneously.
Full-Service Auto Repair and Body Shop
A centralised pneumatic main for 10 or more bays simultaneously without pressure loss. High pressure compensates for drops in long pipelines, ensuring normal pneumatic tool operation at every bay. Recommended to complement the system with a refrigerated air dryer to protect tools from condensate.
4V-1.05/12.5 vs Other Models: When You Need This Compressor
| Parameter | W-0.9/8 | 4V-1.05/12.5 |
|---|---|---|
| Pressure (bar) | 8 | 12.5 |
| Air delivery (l/min) | 900 | 1050 |
| Power (kW) | 7.5 | 7.5 |
| Receiver (L) | — | 300 |
| Compression type | Single-stage | 2-stage |
| Sandblasting / heavy machinery | ❌ | ✅ |
If 8 bar is sufficient for your equipment, consider the more affordable W-0.9/8. If you need pressure above 10 bar, a receiver and 2-stage compression — the 4V-1.05/12.5 is the optimal solution in the MZB range.
Why Buy the 4V-1.05/12.5 from Acvatron
- Official supply — direct supply from MZB Compressor, competitive pricing.
- Warranty and service in Chisinau — official warranty, technical support and spare parts in stock at str. Sarmizegetusa 12, office 129.
- Tailored configuration — Acvatron specialists select a dryer, filters and fittings for your pneumatic pipeline.
📞 +373 2269605720 |
💬 WhatsApp |
📍 Chisinau, str. Sarmizegetusa 12, office 129
Frequently Asked Questions about the 4V-1.05/12.5 Compressor
Why does this compressor operate at 12.5 bar instead of the standard 8–10 bar?
The 12.5 bar pressure compensates for losses in long pipelines and enables operation with industrial sandblasters, pneumatic presses and heavy vehicle tyres. This is achieved through 2-stage compression in the 4-cylinder V-block.
Why is a 300 L receiver needed at a delivery rate of 1050 l/min?
The 300 L receiver absorbs peak loads when multiple consumers connect simultaneously, allows the motor to rest between compression cycles and smooths pressure pulsations. Especially important for sandblasting and pneumatic presses.
What are the advantages of 2-stage over single-stage compression?
Air is pre-compressed, cooled, then compressed to final pressure. This reduces discharge temperature, improves efficiency at pressures above 10 bar and greatly extends piston assembly service life compared to single-stage alternatives.
Is the 4V-1.05/12.5 suitable for a centralised enterprise pneumatic main?
Yes. The 1050 l/min delivery and 300 L receiver support a centralised main for multiple consumers. The 1/2-inch outlet fits standard fittings. We recommend adding a refrigerated dryer to protect equipment from condensate.
What oil should be used and how often should it be changed?
Mineral compressor oil SAE 40. First change after 50 hours of run-in, then every 200–300 operating hours. For intensive use (over 8 hours/day) — every 150–200 hours.
