SA250~400 Series Screw Air Compressors

Once a plant reaches a certain scale, a compressor stops being a single piece of equipment and becomes infrastructure. When a large compressor room goes down, it is not one workstation that suffers but an entire production line, or the whole site. What such operations ask of a compressor comes down to two things: steady and economical.

The Fusheng SA250~400 Series high-power screw air compressor is aimed at large compressor rooms. It covers 250~400kW, with air delivery of 34.8~70m³/min and working pressure of 0.7~1.25MPa, and 6kV and 10kV models are also available. Its strengths are a proven, reliable design, low maintenance cost and adaptability to a wide range of operating conditions.

How Selection Works at High Power

Above 250kW the logic of selection is quite different from that of small machines. Smaller units may be judged on price and flexibility, but a large machine has to be assessed over its whole life: electricity accounts for a bigger share, downtime costs more, and the convenience of maintenance and the availability of spare parts directly determine whether the compressor room can run reliably over the long term.

As a proven series, the SA250~400 is designed to that logic: stable and reliable, low in maintenance cost, and built to adapt to a wide range of conditions. For a large plant, that means fewer surprises and more controllable running costs.

Adapting to Many Conditions: Stability by Design

Adapting to many conditions sounds vague, but in practice it matters. A large compressor room often serves several production lines and workshops at once, so the duty is complex and swings in ambient temperature and load are wider. A machine that runs steadily under those conditions relies on a mature platform and solid construction rather than any single specification.

That is where the value of a proven model lies: a structure validated over many years means well-understood failure modes and ample service experience, giving more certainty in both routine maintenance and troubleshooting.

6kV / 10kV Models: Made for Large Sites

The SA250~400 offers optional 6kV and 10kV models, which is one expression of its practicality in large plants. A high-voltage motor can be connected directly to the site's high-voltage distribution system, reducing transformer stages and the associated equipment investment — an option worth evaluating carefully for sites with heavy power demand and a higher distribution voltage.

When selecting, the voltage level should match the site's existing distribution conditions, with starting method, cabling and protection arrangements worked out at the same time.

Complete Spare Parts Support Removes the Worry

When a high-power compressor stops for want of a part, every day spent waiting is a loss. The SA250~400's emphasis on complete spare parts support means users can obtain the parts they need promptly for routine maintenance and overhauls, cutting the long stoppages caused by missing components. In a large compressor room, parts availability is itself part of reliability.

Technical Specifications

The specification table also covers air-cooled and water-cooled models, starting method, outlet size, dimensions and weight; figures for each individual model can be found in the full parameter chart further down the page.

Who It Suits

• Large manufacturing plants: heavy air demand requiring plant-wide or area-wide centralised supply;
• Sites with high-voltage distribution: where high-voltage supply is available, 6kV / 10kV models can be evaluated;
• Complex duty with large load swings: where adaptability and stability of the model matter most;
• Users sensitive to downtime who value spare parts support: steady parts supply makes maintenance more certain.

Selection Advice

1. Select on the basis of plant-wide air planning: a high-power compressor room should be sized on air demand calculated across existing and planned lines together;
2. Evaluate the voltage option: 6kV / 10kV models must match the site's distribution conditions, with the associated equipment costed as well;
3. Choose air or water cooling by site conditions: high-power units dissipate a lot of heat, and water and air cooling each suit different situations;
4. Weigh spare parts and service response: downtime on a large unit is costly, so service and parts support deserve more consideration than price.

Conclusion

A high-power compressor is not so much a purchase of one machine as an investment in long-term uptime. Through a proven platform, a choice of voltage levels and a reasonably complete spare parts system, the SA250~400 answers what large compressor rooms care about most: stability, adaptability and less downtime. For a plant operating at scale, those are the variables that genuinely decide running cost.