Hitachi America, Ltd.Hitachi Industrial Equipment

Oil-Free Rotary Screw Air Compressors 335-900 hp (250-680 Kw)

While most manufaturers top out at 500hp, your compressed air needs don’t, and neither does Hitachi. The SDS Series features two-stage models up to 900hp. Not only do the Hitachi SDS compressors go bigger, they also last longer, thanks to Hitachi’s legendary reliability founded upon a culture of quality. Teachnological innovations found in the SDS Series, such as PLC control, result in a compressor that outperforms and outlasts the competition. With Hitachi, reliable premium air comes standard.

Speed
Stage
Cooling

Why Hitachi?

Discharge Silencer

Through the reduction of press pulsations, the discharge silencer reduces noise levels.

Noise Control Cover

Rboust construction aids in the reduction of noise leakage caused by vibration and air turbulence (inlet and vent).

Main Motor

Reliability is increased thanks to a totally enclosed fan-type motor (TEFC)

Oil Capture System

A Oil Mist Capturing System (OMCS) collects oil mist discharged from the gear casing.

Highly Durable Capactiy Regulator Valve

The intake valve is driven by a simple hydraulic piston allowing for a reduced pressure setting range during load, which improves the compressor’s efficiency.

New Air Block

1

3-D Screw Rotor (patented)

A new rotor design compensates for thermal deformation distribution due to air temperature differences from inlet to outlet. The rotors also received a new, patented resin coating, increasing durability.

2

Long-Life Bearings

Precision machining, high quality materials, advanced analysis, and lubricating theory are used in the design of the SDS Air Block bearings ensuring increased longevity.

3

Precision machining, high quality materials, advanced analysis, and lubricating theory are used in the design of the SDS Air Block bearings ensuring increased longevity.

Intuitive Control Panel

  • LCD Colour Touch Screen
  • Easily Input Settings
  • View Operation History (Value/Graph)
  • View Trip History (Detail/List)
  • Power Saving Control (Standard)

Optional

  • Multi-unit Control
  • Remote Communication
  • Remote Monitoring

Energy Conservation Via Inverter Control

1

Rotation speed control

An inverter suppresses discharge pressure fluctuations to approximately 1.45 psi (0.01 MPa), thereby reducing discharge pressure and power consumption. This allows for energy savings of around 14% compared to two-step devices when the load ratio is 60%.

2

Hitachi’s unique APC control

The addition of Hitachi’s unique Active Power Control (APC) function permits control of the end pressure, which enables greater energy savings of about 25% compared to two-step devices when the load ratio is 60%.

3

Wide range of rotation speed control

The rotation speed may be controlled at about 20-100% of capacity.

4

Greatly improved motor maintainability

The earth brush, indispensable for inverterdriven motors, was a consumable product. The new device adopts new structural parts that eliminate the need for maintenance work, significantly improving maintainability.