The Siemens V94.3 family — including the V94.3A and the current SGT5-4000F designation — is a 300 MW-class heavy-duty gas turbine designed for 50 Hz grids. With more than 350 units installed and over 17 million equivalent operating hours, the SGT5-4000F is one of the most proven F-class machines in Siemens Energy's portfolio.
Operators of V94.3A/SGT5-4000F fleets need a reliable source for hot-gas-path castings, combustion hardware and compressor airfoils. ZURN Power supplies V94.3 spare parts manufactured to OEM material and dimensional specifications, with EN 10204 3.1 certification and full traceability.
V94.3 / SGT5-4000F Technical Specifications
| Parameter | V94.3 / SGT5-4000F Value |
|---|---|
| Frequency | 50 Hz |
| Simple-cycle output | 292–329 MW (ISO) |
| Combined-cycle output (1×1) | 475–485 MW |
| Combined-cycle output (2×1) | 950–970 MW |
| Thermal efficiency (simple cycle) | ~39.8–41% |
| Thermal efficiency (combined cycle) | ~59.7–61% |
| Compressor | 15-stage axial, pressure ratio ~17–20.1:1 |
| Turbine | 4 stages, fully air-cooled hot gas path |
| Combustion | Annular walk-in combustor, DLN hybrid burners |
| Fuel | Natural gas, LNG, sour gas, distillate, biodiesel, kerosene, condensate |
| Exhaust mass flow | ~724 kg/s |
| Exhaust temperature | ~599°C |
All data reflects published OEM documentation and field-verified operating experience. Specifications vary by unit vintage, upgrade package and ambient conditions.
Spare Parts We Supply for the V94.3
Our V94.3 parts program covers the full gas turbine, from compressor inlet to exhaust diffuser. Each component is manufactured to OEM geometry and material specifications, with dimensional inspection and material certification.
| Component | Materials / Notes | Typical Lead Time |
|---|---|---|
| Stage 1–4 turbine blades | IN738LC, René 80, DS/SX, MCrAlY+YSZ TBC | 10–16 weeks |
| Stage 1–4 turbine vanes / segments | X45, FSX-414, IN738, ceramic TBC | 10–16 weeks |
| DLN hybrid burners & heat shields | Hastelloy X, Nimonic 263, coated hardware | 6–10 weeks |
| Annular combustor heat shields | Nimonic 263, Hastelloy X, TBC | 8–12 weeks |
| Compressor blades rows 1–15 | 12Cr steel, 17-4PH, titanium/aluminum options | 4–8 weeks |
| Rotor discs, Hirth couplings, tie bolts | CrMoV steel, Inconel 718, precision machining | 8–14 weeks |
Applications
The V94.3 / SGT5-4000F is deployed in a wide range of power generation configurations:
- Large combined-cycle power plants
- Utility-scale base-load generation
- Cogeneration and district heating
- Industrial power for refineries, LNG plants and desalination
Quality & Certification
Every V94.3 spare part is produced under our ISO 9001:2015 and AS9100D quality system. Material sourcing starts with certified ingot or bar stock (EN 10204 3.1), followed by investment casting or precision machining, heat treatment, coating application and final dimensional inspection. We provide full documentation packages for operator quality records and insurance surveys.
Frequently Asked Questions
What is the difference between V94.3 and V94.3A?
V94.3A is an advanced evolution of the V94.3 with improved aerodynamics, cooling and materials. Both are now marketed by Siemens Energy as the SGT5-4000F. Part interchangeability depends on serial-specific revisions.
What is the Siemens SGT5-4000F power output?
The SGT5-4000F produces 292–329 MW in simple cycle and up to 485 MW in a 1×1 combined-cycle arrangement. A 2×1 plant can reach approximately 970 MW.
Can you supply V94.3A hot-gas-path parts?
Yes. We manufacture stage 1–4 blades, vanes, combustor heat shields and DLN burners for V94.3A/SGT5-4000F fleets.
Do V94.3 parts require OEM material certification?
Yes. All our V94.3 replacement parts ship with EN 10204 3.1 material certificates, dimensional reports and coating documentation where applicable.