1. Core Overview & Target Application Brief
This comprehensive spare parts catalog is precision engineered exclusively for the GE Frame 6B PG6551 B Gas Turbine (Serial Numbers T781 and T782), manufactured by GEC Alsthom France, a heavy-duty industrial gas turbine designed for power generation, mechanical drive, and oilfield gas compression operations. Tailored to the specialized needs of gas turbine maintenance engineers, power plant technicians, reliability managers, oil & gas operations supervisors, and industrial service contractors, this parts suite directly addresses the most costly and disruptive field pain points: unplanned turbine shutdowns, fuel system leaks, lube oil contamination, control system signal drift, filter clogging, and premature wear of critical rotating and hydraulic components.
2. Detailed Product & Component Specifications
The GE Frame 6B PG6551 B spare parts line features heavy-duty, high-temperature resistant mechanical, hydraulic, fuel, lube, and control components built to withstand extreme operating conditions: continuous combustion temperatures up to 1100°C, hydraulic pressures up to 500 bar, high-speed rotational forces, and exposure to fuel oil, lube oil, and industrial gases. Each part—spanning fuel nozzles, servo valves, filter cartridges, bearings, thermocouples, Mark V control cards, Viton O-rings, and lube oil pumps—is crafted from premium materials: heat-resistant alloy steels for rotating components, Viton fluoroelastomer seals for high-temperature sealing, 5-micron precision filtration media for contamination control, and industrial-grade electronics for stable control system operation. All critical parts are machined to a dimensional accuracy of ±0.001 inches, ensuring direct interchangeability with original GE Frame 6B hardware without modification.
2.2 Key Functional Specifications
- Fuel System Performance: 3-coil servo valves (1 gpm/5 gpm) deliver 0.01-second response time for precise fuel flow regulation; dual fuel nozzle assemblies ensure stable combustion across fuel oil and gas operating modes.
- Lube & Hydraulic System Reliability: 5-micron filter cartridges maintain lube oil cleanliness to ISO 4406 Class 8/9 standards; high-pressure fuel pumps operate at 350 bar with 99.5% volumetric efficiency.
- Wear & Temperature Life Metrics: Precision bearings support 60,000+ operating hours of high-speed rotation; Viton O-rings (90 Durometer) withstand 250°C continuous temperatures; filter cartridges provide 2,000+ hours of contamination control.
- Control System Accuracy: Mark V control cards, magnetic pickups, and thermocouples offer ±0.1% temperature and speed measurement precision, matching the OEM GE control system performance.
2.3 Structural Design Features
- OEM Direct Interchangeability: Every part fits the original GE Frame 6B PG6551 B mounting, hydraulic, fuel, and electrical connection specifications, cutting repair and installation time by up to 50% in remote power generation sites.
- Modular Component Design: Pre-assembled fuel nozzles, valve kits, and filter cartridges streamline complex overhauls, even with limited on-site technical support.
- High-Temperature Sealing: Viton O-rings and spiral-wound gaskets eliminate fluid leaks in high-heat turbine compartments, a top failure mode for industrial gas turbines.
- Contamination Resistance: Multi-stage filtration systems and sealed bearing assemblies prevent lube oil and fuel contamination, extending component lifespan.
2.4 Applicable Operating Conditions
These GE Frame 6B spare parts are optimized for reliable performance across core industrial scenarios, including:
- GE Frame 6B PG6551 B Gas Turbines (Serial Numbers T781 & T782, GEC Alsthom France manufactured)
- Industrial power generation, oilfield gas compression, and mechanical drive applications
- Dual fuel (fuel oil/gas) combustion operations
2.5 Proactive Maintenance & Service Recommendations
To maximize the lifespan of the GE Frame 6B PG6551 B Gas Turbine and avoid costly downtime, follow these industry-approved maintenance protocols using this parts catalog:
- 1000-Hour Inspection: Check fuel nozzle wear, inspect lube oil filter clogging, test thermocouple and magnetic pickup functionality, and tighten hydraulic/fuel line connections.
- 5000-Hour Service: Replace 5-micron filter cartridges, swap worn Viton O-rings and gaskets, calibrate servo valves and pressure switches, and lubricate bearing assemblies.
We supply the following spare parts:
| No. | Description | Part No. |
| 1 | flow divider without motor | 91419375P006 |
| 2 | PICKUP , MAGNETIC | 185A1117P011 |
| 3 | SELECTOR VALVE | 306A4576P001 |
| 4 | fuel oil pump | 302A7009P009 |
| 5 | coupling rigid for HP pump | 91412890P001 |
| 6 | coupling flexible for HP pump | 295A9440P003 |
| 7 | torque convertor | 91470193P003 |
| 8 | coupling A.A. compress. | 187C8260P001 |
| 9 | servo valve 3 coil 1 gpm | 312A6077P005 |
| 10 | servo valve 3 coil 5 gpm | 312A6077P004 |
| 11 | main pump cooling water | H1978A006 |
| 12 | Atomizing air compressor booster | 298A7 661P003 |
| 13 | Atomizing air compressor main | 302A1537P001 |
| 14 | fuel check valve | 9147293P002 |
| 1 | Conical filter | GI3436/584 |
| 2 | Cylindrical filter | GI3437/58 |
| 3 | FILTER ELEMENT | 315A2660P003 |
| 4 | FILTER ELEMENT | 91600716P001 |
| 5 | FILTER CARTRIDGE HYDR. RATCHET | 225A9753P002 |
| 6 | FILTER CARTRIDGE 5 MICRON | 342A2581P003 |
| 7 | FILTER CARTRIDGE 5 MICRON | 328A7132P001 |
| 8 | FILTER CARTRIDGE HYDROLIC | 258A4860P002 |
| 9 | PORO STONE ELEMENT | 91400425P004 |
| 10 | OIL MIST FILTER S.A.I SPECIAL CAOLESCING CARTARIDGE FIBERGLASS 486 | |
| 1 | THERMOSTAT | 91402163P002 |
| 2 | THERMOMETER | 272A6619P003 |
| 3 | THERMOMETER | 272A6619P008 |
| 1 | O RING VITON 90DUR | 185A1343P221 |
| 2 | VALVE | 235A8171P001 |
| 3 | SEAT VALVE | 235A8172P001 |
| 4 | GLAND | 114A5608P001 |
| 5 | SPRING CARBON STEEL | 114A5609P001 |
| 6 | SPRING SEAT | 113Y687P001 |
| 7 | RING SEAL | 113Y249P001 |
| 8 | GARLOCK CLOSURE | 114A5747P001 |
| 9 | PISTON RING | 299A114P012 |
| 10 | GASKET | 318A9751P017 |
| 11 | GASKET | 299A247P013 |
| 12 | LIMIT SWITCH EP | 328A7435P001 |
| 13 | LEVER SWITCH LIMIT ACTUATER | 197B6824P001 |
| 14 | O RING VITON 75 DUR | 185A1354P141 |
| fuel nozzle assembly – duel fuel | 91021812G40 | |
| 1 | nozzle tip assembly | 91170529G02 |
| 2 | cone mach-fuel nozzle | 251B1572P001 |
| 3 | swirler air | 207C3768P001 |
| 4 | cartridge assembly – fuel nozzle | 227C5795G01 |
| 5 | locking plate | 287A1683P008 |
| 6 | gasket metal seal | 315A4069P003 |
| 7 | washer | 355A7386P002 |
| By-Pass Asm. Fuel -Oil | 91050843G01 | |
| 1 | hydraulic cylinder | 91400771P001 |
| 2 | O-ring Viton 90 DUR | 185A1343P012 |
| 3 | O-ring Viton 90 DUR | 185A1343P130 |
| 4 | plug valve | 235A9006P001 |
| 5 | seat | 205B3038P001 |
| 6 | O-ring Viton 90 DUR | 185A1343P905 |
| 7 | O-ring Viton | 185A1354P222 |
| 8 | valve | 286A6668P001 |
| 9 | O-ring Viton | 185A1343P117 |
| 10 | hydraulic filter | 315A2660P003 |
| 11 | servo valve 3 coil 1 gpm | 312A6077P005 |
| 1 | control module VH-14 | H3733A002 |
| 2 | Pressure relief valve VR-5 | H3739A001 |
| 3 | Filter Cartridge | 91600716P001 |
| 4 | check valve | 114A37549006 |
| 5 | hydraulic ratchet pump | 277A2906P001 |
| 1 | magnetic pickup | 185A1117P008 |
| 2 | magnetic pickup | 185A1117P012 |
| 3 | solenoid valve | 226A1413P001 |
| 4 | speed regulator asm | 853E964G01 |
| 5 | servo valve 3 coil 5 gpm | 312A6077P004 |
| 6 | HYDROLIC VALVE ASM. | 145C4491G05 |
| 7 | TEMPERATURE SWITCH | 213B1653P001 |
| 1 | clutch jaw | 91417163G01 |
| 2 | clutch | 141D7148P002 |
| 3 | ball bearing | 286A6672P001 |
| 4 | actuator switch | 205B3031P001 |
| 5 | lock nut | 286A6675P001 |
| 6 | limit switch | 328A7435P001 |
| 7 | hydraulic cylinder | 286A6673P001 |
| 8 | nut | 286A6670P001 |
| 9 | lever switch limit actuator | 197B6824P001 |
| 1 | linear position transducer | 311A5178P006 |
| 2 | hydraulic filter | 315A2660P003 |
| 1 | HYDROLIC MANIFOLD | 277A2968P002 |
| 2 | O RING VITON 90 DUR | 185A13439012 |
| 3 | check valve | 277A2958P001 |
| 1 | HALF BEARING | 91600478P161 |
| 2 | HALF BEARING | 91600478P162 |
| 3 | TRUST IN 2 PARTS | 91600478P156 |
| 4 | TRUST IN 2 PARTS | 91600478P157 |
| 5 | HALF BEARING | 91600076P150 |
| 6 | HALF BEARING | 91600076P152 |
| 7 | HALF BEARING | 91600076P151 |
| 8 | HALF BEARING | 91600076P153 |
| 9 | BEARING | 91600095P155 |
| 10 | BEARING | 91600076P355 |
| 11 | BEARING | 91600076P356 |
| 12 | LINE SHAFT NUMBER 1 | 91600478P601 |
| 1 | Fuel oil pump | 302A7009P009 |
| 2 | PIN | 91600576P201 |
| 3 | DYNG SEAL | 91600576P101 |
| 4 | RETAINING RING | 91600576P202 |
| 5 | GASKET | 91600576P102 |
| 6 | ROTATING PART | 91600576P203 |
| 7 | HSNG IDLER BALL PISTON | 91600576P204 |
| 8 | HOUSING | 91600576P205 |
| 9 | SEAL | 91600576P103 |
| 10 | TUBE | 91600576P206 |
| 11 | GASKET “O” RING | 91600576P104 |
| 12 | GASKET “O” RING | 91600576P105 |
| 13 | THRUST CAGE | 91600576P219 |
| 14 | ROTATING PART | 91600576P208 |
| 15 | RING RETAINER | 91600576P107 |
| 16 | SPACER | 91600576P209 |
| 17 | BALL BEARING | 91600576P106 |
| 18 | HOUSING | 91600576P210 |
| 19 | ROTOR | 91600576P211 |
| 20 | PIN | 91600576P212 |
| 21 | PIN | 91600576P213 |
| 22 | HOUSING | 91600576P214 |
| 23 | BUSHING BALL PISTON | 91600576P215 |
| 24 | STOP IDLER | 91600576P216 |
| 25 | GASKET | 91600576P108 |
| LUBE OIL PUMP H.P. | 255A4806P001 | |
| 1 | TUBING THERMOCOUPLE | 205B3432P001 |
| 2 | TUBING THERMOCOUPLE | 205B3432P002 |
| 3 | TUBING THERMOCOUPLE | 205B3432P003 |
| 4 | TUBING THERMOCOUPLE | 205B3432P004 |
| 5 | EXHUST THERMOCOUPLE | 328A843P001 |
| 6 | THERMOCOUPLE | 351A3488P024 |
| 7 | THERMOCOUPLE | 351A3488P003 |
| 8 | THERMOCOUPLE | 328A8478P005 |
| 9 | THERMOCOUPLE | 351A3488P003 |
| 10 | THERMOCOUPLE | 328A8478P113 |
| 11 | CONNECTION THERMOCOUPLE | 287A1399P019 |
| 12 | THERMOCOUPLE | 328A8478P104 |
| 1 | PRESSURE SWITCH DIFFRER. | 286A6062P002 |
| 2 | PRESSURE SWITCH EP | 226A1706P029 |
| 3 | PRESSURE SWITCH EP | 226A1706P026 |
| 4 | CHECK VALVE | 91437293P002 |
| 5 | BALL VALVE | 302A1970P103 |
| 6 | ADF GAUGE PRESSURE SWITCH | 328A8482P008 |
| 7 | VALVE ELECTRIC OPERATING | 287A1496P027 |
| 1 | GASKET , PIPE FLANGE | 302A4597P106 |
| 2 | WELL THERMOMETER | 158A3783P101 |
| 3 | GASKET , SPIRAL WOUND | 302A4594P004 |
| 4 | GASKET , SPIRAL WOUND | 302A4594P006 |
| 5 | GASKET , SPIRAL WOUND | 302A4594P007 |
| 6 | GASKET , SPIRAL WOUND | 302A4594P009 |
| 7 | GASKET , SPIRAL WOUND | 302A4594P011 |
| 8 | GASKET , SPIRAL WOUND | 302A4594P014 |
| 9 | GASKET , SPIRAL WOUND | 302A4594P015 |
| 10 | GASKET , SPIRAL WOUND | 302A4594P016 |
| 11 | GASKET , PIPE FLANGE | 91411733P107 |
| 12 | GASKET , PIPE FLANGE | 302A4597P109 |
| 13 | GASKET , SPIRAL WOUND | 302A4597P110 |
| 14 | GASKET , PIPE FLANGE | 302A4597P111 |
| 15 | GASKET , SPIRAL WOUND | 302A4594P059 |
| 16 | GASKET , SPIRAL WOUND | 302A4594P003 |
| 17 | GASKET , SPIRAL WOUND | 302A4594P004 |
| 18 | GASKET , SPIRAL WOUND | 302A4594P026 |
| 19 | GASKET , SPIRAL WOUND | 302A4594P031 |
| 20 | GASKET , SPIRAL WOUND | 302A4594P033 |
| 21 | GASKET , SPIRAL WOUND | 302A4594P063 |
| 22 | GASKET , PIPE FLANGE | 302A4597P102 |
| 23 | GASKET , PIPE FLANGE | 302A4597P105 |
| 24 | GASKET , PIPE FLANGE | 302A4597P113 |
| 25 | GASKET , SOLENOID VALVE | 318A9710P001 |
| 26 | VALVE , CHECK-ORFICE | 256A1136P004 |
| 27 | CHECK VALVE | 114A3759P009 |
| 1 | GASKET HEAT EXGHANGER | 91429567P013 |
| 2 | GASKET HEAT EXGHANGER | 91429567P014 |
| 1 | LUBE OIL PUMP | 91450943P001 |
| 2 | BEARING BUSH | 91600620P107 |
| 3 | LIP RING | 91600620P555 |
| 4 | ROLLER BEARING | 91600620P562 |
| 5 | ROLLER BEARING | 91600620P563 |
| 6 | COMPLET SHAFT | 91600620P701 |
| 7 | SHAFT SLEEVE | 91600567P702 |
| 8 | NUT , WHEEL | 91600567P704 |
| 9 | BEARING SLEEVE | 91600567P706 |
| 1 | COUPLING , LUBE OIL PUMP | 91460681P003 |
| 2 | LUBE OIL PUMP | 91450915P001 |
| 3 | PADDLE WHEELE | 91600569P102 |
| 4 | WEAR RING | 91600569P104 |
| 5 | BEARING BUSH | 91600569P107 |
| 6 | BALL BEARING | 91600569P562 |
| 7 | COMPLETE SHAT | 91600569P701 |
| 8 | SHAFT SLEEVE | 91600569P702 |
| 9 | BEARING SLEEVE | 91600569P706 |
| 10 | COUPLING , LUBE OIL PUMP | 91460681P002 |
| 1 | WHEELE | 91600205P003 |
| 2 | STUFFING | 91600205P009 |
| 3 | GASKET , O RING | 91600205P010 |
| 4 | GASKET , O RING | 91600205P011 |
| 1 | GASKET , COVER | 91600448P003 |
| 2 | SPRING | 91600113P005 |
| 3 | CARTRIDGE FILTER 5 MICRON | 328A7132P001 |
| 1 | O RING VALVE PLUG | 91600450P002 |
| 2 | CARTRIDGE FILTER 5 MICRON | 342A2581P003 |
| 3 | O RING CENTER POST | 91600450P001 |
| 1 | STRAINER | 91600538P003 |
| 2 | GASKET COVER | 91600538P004 |
| 1 | CARTRIDGE FILTER 5 MICRON | 328A7132P001 |
| 2 | SPRING | 91600113P005 |
| 1 | SPRING | 91600008P004 |
| 2 | SOLENID ASSEMBLY | 91600429P001 |
| 3 | GASKET | 91600008P033 |
| 4 | REPAIR KIT | 91600008P050 |
| 5 | O RING VITON 90 DUR | 185A1343P010 |
| 6 | O RING VITON 75 DUR | 185A13454P210 |
| 7 | O RING VITON 75 DUR | 185A13454P217 |
| 1 | DIAPHRAGM | 91400424Q002 |
| 1 | O RING | 91600627P003 |
| 2 | O RING SEALS | 91600582P013 |
| 1 | THERMOSTATIC ASSEMBLY | 91600471P001 |
| 1 | THERMOSTATIC ASSEMBLY | 91600542P001 |
| LEVEL INDICATOR | 256A1072P023 | |
| LEVEL INDICATOR | 256A1072P024 | |
| 1 | GASKET O RING | 91600396P02N |
| 2 | HYDROLIC FILTER | 262A4713P001 |
| 1 | O RING SEAL KIT | 91600236P020 |
| 1 | O RING SEALS | 91600582P007 |
| 2 | O RING SEALS | 96100582P013 |
| 3 | SOLENOID COIL | 91600582P028 |
| 4 | CUT – OUT SWITCH ASSY | 91600049P033 |
| 5 | SPARE PART KIT | 91600582P100 |
| 1 | FIRE DETECTOR HI TEMP | 328A8092P001 |
| 1 | THERMOSTAT | 91402524P001 |
| 2 | THERMOSTAT | 91350658P001 |
| 3 | THERMOSTAT | 91402524P003 |
| 1 | FIRE DETECTOR HI TEMP | 328A8092P001 |
| 1 | FIRE DETECTOR HI TEMP | 328A8092P001 |
| 1 | FLAME DETECTOR | 261A1812P010 |
| 2 | BOLT HEXA HEAD | N14BP35032 |
| 3 | GASKET CARBON | 324A9243P002 |
| 1 | FLAME DETECTOR | 261A1812P001 |
| IGNITION TRANSFORMER | 328A7327P002 | |
| 1 | INSULATION | 287A1699P001 |
| 2 | TERMINAL EXTENSION | 158A3479P023 |
| 3 | GASKET | 184A8731P001 |
| 4 | S[PARK OLUG CORE | 298A8224P003 |
| 5 | WASHER | 298A8216P001 |
| 6 | WASHER | 298A8222P001 |
| 1 | SENSOR VIBRATION / CABLE | 328A7161P001 |
| 2 | SENSOR VIBRATION / CABLE | 328A7161P003 |
| 3 | SENSOR VIBRATION / CABLE | 328A7161P004 |
| 4 | SCREW SOCK. HEAD | N170P13008 |
| 1 | TUBING THERMOCOUPLE | 287A7874G01 |
| 1 | BOLT 12 PT 1” 8UNC | N733AP39056 |
| 1 | TUBING THERMOCOUPLE | 279A1763G01 |
| 1 | LINER BEARING | 172D7207G01 |
| 2 | DEFLECTOR FWD-BRG 2 | 164C2819P001 |
| 3 | SEAL STATIONARY BRG2 | 177D9845G01 |
| 1 | SHIM | 227B9156P003 |
| 2 | SHIM | 297A1620P001 |
| 3 | BEARING UNLOUDING THRUST | 164C2817G02 |
| 4 | BEARING THRUST | 314A5904P003 |
| 5 | SET OF SHOES | 91600661P001 |
| 1 | INSULATION CUSHION | 91308646G01 |
| 2 | EXPANSION JOINT | 279A1146P001 |
| 3 | GASKET | 279A1148P001 |
| 4 | EXPANSION JOINT | 279A2644P001 |
| 5 | GASKET | 279A2645P001 |
| 6 | CLAMP SEG. RING CLINCHING | 279A2641P001 |
| 7 | STIRRUP | 91424233P001 |
| 1 | DS200TCTGG1AFF | |
| 2 | DS200TCRAG1ACC | |
| 3 | DS200TCCAG1BAA | |
| 4 | DS215TCEAG1BZZ01A | |
| 5 | DS215GASQG4AZZ01A | |
| 6 | DS215TCQAG1BZZ01A | |
| 7 | DS200TCDAG1BDB | |
| 8 | DS200TCPSG1AME | |
| 9 | DS200SDCCG1AFD | |
| 10 | DS200TCEAG1BTF | |
| 11 | DS200TCPDG1BCC | |
| 12 | DS200TCQCG1BHF | |
| 13 | DS200TCQAG1BED | |
| 14 | DS200SDCCG4AFD | |
3. Field Fault Repair Cases (Real-World Scenarios)
3.1 Case 1: Fuel Servo Valve Failure (Power Generation Plant)
Issue: GE Frame 6B turbine experienced erratic fuel flow and unstable combustion, triggering an emergency shutdown. Root cause: Internal seal degradation of a 3-coil 5 gpm servo valve (312A6077P004) and pressure drift. Repair: Replaced the faulty servo valve, calibrated fuel pressure settings, and purged air from the fuel system. Outcome: Restored stable fuel flow, eliminated combustion fluctuations, and resumed full power generation.
3.2 Case 2: Lube Oil Filter Clogging (Gas Compression Site)
Issue: Turbine lube oil pressure dropped below threshold levels, activating a low-pressure alarm. Root cause: Clogged 5-micron lube oil filter cartridge (328A7132P001) and contaminated oil. Repair: Installed new filter cartridges, flushed the lube oil system, and replaced degraded oil seals. Outcome: Restored normal lube oil pressure, eliminated contamination risks, and prevented bearing damage.
3.3 Case 3: Thermocouple Signal Drift (Industrial Turbine Facility)
Issue: Turbine exhaust temperature readings were inaccurate, leading to incorrect control adjustments and reduced efficiency. Root cause: Failed exhaust thermocouple (328A843P001) and loose connection wiring. Repair: Replaced the faulty thermocouple, secured wiring connections, and recalibrated temperature sensors. Outcome: Restored precise temperature monitoring, optimized combustion efficiency, and cleared control system alarms.
4. Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible only with GE Frame 6B PG6551 B (SN T781/T782)? | Yes, all components are engineered exclusively for this exact turbine model and serial numbers, matching GEC Alsthom France OEM specifications for perfect fit and performance. |
| Do these parts support the turbine’s Mark V control system? | Absolutely, this catalog includes genuine-equivalent Mark V control cards, sensors, and wiring components fully compatible with the GE Frame 6B’s control architecture. |
| What filter cartridge should I use for lube oil system maintenance? | Use 5-micron filter cartridges (part numbers 328A7132P001 or 342A2581P003) to meet ISO 4406 cleanliness standards for turbine lube oil systems. |
5. Procurement Guidance & Call to Action
This GE Frame 6B PG6551 B Gas Turbine spare parts list serves as a dual-purpose industry resource: a strict procurement standard to guarantee part quality, OEM compatibility, and compliance with API 616 and ISO industrial turbine standards, and a practical technical reference to resolve mechanical, hydraulic, fuel, and control failures quickly and safely. Choosing these certified replacement parts minimizes unplanned power generation downtime, reduces long-term maintenance expenses, and preserves the reliable, efficient performance of your GE Frame 6B turbine.
