425H-1.webp

425h Specifications, Features & Compatibility Guide

3 bar, specifically engineered for the high-demand environments of construction and rental job sites.This 2000 kg portable unit utilizes an oil-injected rotary screw pump driven by a 117 kW (157 HP) diesel engine to maintain a continuous duty cycle without performance drops.

Quick Answer

Absolutely, invest in the Sullair 425H if your projects demand unwavering high-pressure air delivery on challenging Indian job sites. Its 425 cfm at 10.3 bar, powered by a 117 kW diesel engine, ensures continuous, efficient operation without performance drops. This unit is built for contractors prioritizing sustained output and verified efficiency over initial low cost, ensuring long-term operational savings.

The Sullair 425H is ideal for Indian construction and rental professionals demanding continuous, high-pressure air and long-term efficiency. Skip it for residential-scale tasks or if your budget strictly prioritizes minimum upfront costs over verified performance and sustained operational savings.

✓ Who Should Buy

  • performance suitable for residential spaces.
  • Verified efficiency of standard rating for reduced long-term operational costs.
  • Structural stability for consistent cleaning under rigorous use cases.
  • Hardware durability via premium components and advanced technology.
  • Built-in grid protection with Standard power cycle voltage management.

✕ Who Should Avoid

  • Spaces or usage requirements exceeding residential rated capacity.
  • Installations prioritizing minimum capital expenditure over high-efficiency performance.
  • Unstable grid conditions exceeding the functional threshold of Standard power cycle.
  • Environments incompatible with compressors physical and thermal dissipation specs.
Product Overview
The Sullair 425H provides 425 cfm of free air delivery at 10.3 bar, specifically engineered for the high-demand environments of construction and rental job sites. This 2000 kg portable unit utilizes an oil-injected rotary screw pump driven by a 117 kW (157 HP) diesel engine to maintain a continuous duty cycle without performance drops. Housed in a powder-coated galvanneal sheet metal enclosure, the 425H includes a 246 L fuel tank to minimize refueling frequency during long shifts. The direct drive system ensures efficient power transfer from the motor to the pump, while the 76 dB(A) noise level at 7 meters allows for operation in noise-sensitive locations. Safety is managed through a low oil shutdown system and thermal protection, while the moisture separator ensures the 12 m³/min airflow remains suitable for downstream pneumatic equipment and air tools.

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Engineering Analysis
The 425H engineering is centered on the 117 kW direct drive configuration, which eliminates belt slippage and improves mechanical efficiency when generating 425 cfm of airflow. Its oil-injected rotary screw pump is designed for continuous duty, meaning the 10.3 bar maximum pressure can be sustained indefinitely as long as the 246 L fuel tank is supplied. The 2000 kg weight is distributed across a towable trailer with anti-vibration mounts to protect the internal engine-to-pump alignment during transport across uneven terrain. By utilizing a 12 m³/min free air delivery rate, the 425H can simultaneously power multiple 90 lb breakers or large-scale sandblasting nozzles. The inclusion of a moisture separator and a pressure relief valve ensures that the high-volume output does not compromise tool longevity or operator safety. Furthermore, the 76 dB(A) acoustic signature is achieved through precise enclosure venting that maintains airflow for the air-cooled system without allowing excessive sound leakage.

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