Audited Supplier
The T380 steam turbine is a multi-stage back-pressure steam turbine with a single-layer arrangement, featuring compact size and convenient installation. The main shaft operates at a rotational speed of 8,000 r/min, extendable up to 12,000 r/min. Its rotor employs an integrally forged design, and the flow passage consists of one regulating stage and four pressure stages. Axial steam seals between stages minimize steam leakage losses. The main steam valve operates automatically, controlled by high-pressure oil for opening and closing.
This turbine offers a power range of 200-2,000 kW and demonstrates broad applicability. Particularly in petrochemical applications, it drives high-speed direct-drive compressors, water pumps, and fans without requiring gearboxes. This configuration reduces potential failure points, lowers enterprise costs, and delivers low operational expenses for high-speed equipment with notable economic benefits.
Overall dimension drawing
Cross-sectional drawing
2 - Front Pedestal
3 - Front Bearing Housing
4 - Emergency Trip Mechanism
5 - Front Combined Journal-Thrust Bearing
6 - Hydraulic Control Block Assembly
7 - Control Valves and Linkage
8 - Front Steam Seal
9 - Nozzle Group/Nozzle Assembly
10 - 1st Stage Diaphragm
11 - 2nd Stage Diaphragm
12 - 3rd Stage Diaphragm
13 - 4th Stage Diaphragm
14 - Upper Half Casing
15 - Rear Steam Seal
16 - Lower Half Casing
17 - Rear Bearing
18 - Rear Bearing Housing
19 - Rotor
Process Flow
Steam Turbine Body| Item | Unit | Data |
| Product Code | T380 | |
| Rated Speed (Gearbox Reduction) | r/min | 7000~12000 |
| Number of Turbine Stages | 1 regulation stage + 4 pressure stages | |
| Governor Type | DEH Electro-Hydraulic Regulation | |
| Overspeed Protection Method | Two-out-of-three electrical overspeed protection + mechanical overspeed protection | |
| Overspeed Protection Actuation Speed | Rated speed × (1.09 - 1.11) | |
| Overspeed Protection Response Time | s | <0.5 |
| Vibration Value at Rated Speed | mm | ≤0.03 |
| Vibration Value at Critical Speed | mm | ≤0.15 |
| Maximum Axial Displacement | mm | ±0.4 |
| Weight | t | 3 |
| Bearing Lubrication Type | Forced lubrication | |
| Bearing Alarm Temperature | ºC | 85 |
| Turbine Dimensions (Length × Width × Height) | mm | 3300×1600×2000 |
| Turbine Center Height (from Operating Platform) | mm | 900 |
| Steam Seal Type | Comb-Tooth Labyrinth Seal | |
| Noise Level | dB | ≤80 |
| Unit Continuous Operation Time | hr/year | 8000 |
| Turning Gear Method | Electric Turning Gear |
Auxiliary System
| Item | Unit | Data | |
| Oil Station | Flow rate | L/min | 300 |
| Oil Pump Configuration | Oil pressure: Adjustable from 0.3 to 1.0 MPa Two AC oil pumps, one DC oil pump | ||
| Seal steam heater | Heat Transfer Area | m2 | 15 |
| Cooling Water Flow Rate | t/h | 35 | |
| Cooling Water Pressure | MPa | 0.2~0.4 | |
| Cooling Water Temperature (Normal/Maximum) | ºC | 27/33 | |
Emergency Shut-off Device
The emergency shut-off device is a protective mechanism that prevents the rotor from exceeding the allowable rotational speed, installed on the main oil pump casing connected to the main shaft. The emergency shut-off device used in this unit is a centrifugal flyweight type, which has an eccentric weight mounted radially on the main oil pump casing. At normal rotational speeds, a spring force balances it. When the unit's speed exceeds the rated speed by 9-11%, the flyweight is thrown out, causing the emergency shut-off throttle to disengage and activate.
