The STC-ECO is a sealed motor compressor unit from Siemens Energy. It is a compact, fully integrated, sealless motor-compressor unit with low complexity. It has been specifically designed to meet the requirements of the most demanding applications in the upstream business.
The STC‑ECO is a fully integrated, sealless motor‑compressor unit designed for demanding upstream, midstream and downstream dirty‑gas applications. Its canned design eliminates seals, providing major improvements in plant safety, uptime and environmental compliance.
The unit is available in four power ratings (LP1, LP2, HP1, HP2) with a built‑in variable‑speed drive, a compact footprint (4.8 × 4.1 × 4.6 m) and a footprint reduction of over 40 % compared with conventional compressors. Maintenance intervals exceed five years, and the design complies with API 617 and NACE standards.
| Power (MW) – LP1 | 7.5 |
|---|---|
| Rated speed (rpm) – LP1 | 12 200 |
| Speed range (typical) | 30 – 105 % |
| Dimensions (m) | 4.8 × 4.1 × 4.6 |
| Footprint reduction | > 40 % |
It is designed for dirty‑gas applications in upstream, midstream and downstream sectors, such as field depletion, gas‑and‑oil separation, gas gathering and gas lift.
The unit uses a sealless, canned design that eliminates seal leaks, resulting in zero emissions for hazardous and toxic gases.
The STC‑ECO is designed for maintenance intervals of five years or more.
Four power ratings are offered: LP1 7.5 MW, LP2 10 MW, HP1 15 MW and HP2 20 MW.