| WOODWARD / RB5 · UG-10 | Overview Technical Application FAQ Quote |
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WOODWARD GOVERNOR SERIES
RB5 / UG-10
Mechanical-Hydraulic Speed Governing for Steam Turbine Applications
The RB5 / UG-10 configuration is associated with turbine speed-governing applications where a mechanical-hydraulic governor operates the fuel or steam admission control linkage. The UG-10 is the high-output member of the UG-5.7 / UG-8 / UG-10 lever-governor family, with a rated work output of 11.7 ft-lb (15.9 J).
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Inventory Example
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01 / CORE PROFILE
Built Around Mechanical-Hydraulic Control
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The UG Lever governor is designed as a mechanical-hydraulic governor for controlling diesel, dual-fuel engines, or steam turbines. In a turbine installation, the governor output mechanism is mechanically connected to the control linkage so that speed regulation can be translated into movement of the fuel rack or valve mechanism required by the prime mover. UG-10 provides the highest work output among the UG-5.7, UG-8 and UG-10 lever versions. Its maximum output-shaft travel is 42°, while the recommended operating travel is approximately two-thirds of the available travel from no-load to full-load. This leaves useful overtravel at both ends for shutdown and maximum-fuel requirements. |
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02
CONTROL PATH
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Speed → Hydraulic Action → Output Shaft → Prime-Mover Linkage
The governor works through mechanical and hydraulic elements rather than functioning as a digital controller. Correct mechanical linkage, governor mounting, drive alignment and oil conditions are therefore central to dependable operation. Woodward specifies that the governor must be mounted squarely on the drive pad, with the correct coupling and without binding, excessive side loading or axial force on the drive shaft. |
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03 / SYSTEM FIT
Where RB5 / UG-10 Matters
For an RB5 steam-turbine package using a UG-10 governor, the governor sits inside the mechanical speed-control chain between the turbine's operating conditions and the steam-control linkage. This makes the governor relevant when the turbine cannot maintain expected speed, when the control linkage does not follow the expected governor movement, or when a governor-related condition is suspected during startup or load changes. A governor issue can have consequences beyond speed deviation. If the control chain cannot correctly position the turbine control mechanism, the machine may experience unstable speed response, inability to reach the intended operating condition, unexpected loading behavior or an operational trip. For rotating equipment, extended downtime can affect the turbine train, generator availability and the wider production process. |
FIELD SEARCH TRIGGERS
What makes this model relevant during a plant event?
Unexpected turbine speed behavior
Governor output or linkage response concerns
Startup or load-transition instability
Maintenance replacement planning
Risk of prolonged turbine downtime
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MOUNTING
Square mounting on the drive pad
The governor must be securely mounted without rocking or movement. |
DRIVE COUPLING
Correct coupling and alignment
Binding, excessive side loading or axial force on the drive shaft must be avoided. |
LINKAGE
Useful travel without overconstraint
The recommended governor travel leaves reserve movement for shutdown and maximum-fuel conditions. |
SERVICE CHECK
Verify the exact configuration
Governor type, drive arrangement and linkage configuration should be checked before replacement. |
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05 / SAME FAMILY
UG-5.7 · UG-8 · UG-10
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The UG Lever family includes UG-5.7, UG-8 and UG-10 versions. The basic operating, adjustment and troubleshooting principles are shared across the family, while the work-output rating differs by governor size. UG-5.7 is rated at 5.2 ft-lb (7.1 J), UG-8 at 9.7 ft-lb (13.2 J), and UG-10 at 11.7 ft-lb (15.9 J). The UG-10 also uses the higher 150 psi (1034 kPa) oil pressure specified for this model, compared with 120 psi (827 kPa) for the UG-5.7 and UG-8. These distinctions matter when evaluating a replacement for an existing turbine installation. |
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20 YEARS · INDUSTRIAL AUTOMATION
Two Decades of Moving Industry Forward
Since 2005, Amikon has grown from its Hong Kong foundation into a global supplier serving industrial automation and control-system spare-part requirements. Our portfolio covers a broad range of automation components, including PLC, HMI, DCS, panel-control equipment, industrial PC and VFD-related parts. Two decades of continuous development have shaped a supply operation focused on helping customers locate difficult-to-source industrial control components. |
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Reliable sourcing starts with the right model.
Industrial parts support · Global delivery · Practical replacement coordination
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FAST QUOTE / RB5 · UG-10
Tell us exactly what your turbine needs.
For a faster quotation, please provide Part Number, Quantity, Destination, Required Date, and Machine/System. This helps us match the requested governor configuration with your application requirements. |
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| Delivery | 3–5 days | Warranty | 12 months |
| Packing | Brand New | Payment Term | T/T |
| Delivery Way | E-packing / FedEx / EMS / TNT / DHL / UPS | ||
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AFTER DELIVERY
Return / Replacement
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If you have any question after receiving the item, please contact us within 7 days. Returned items should remain in their original condition and be accompanied by the specific reason for return. After the returned item is received, we will arrange an appropriate return or replacement according to the order situation. Shipping costs arising from the return are the buyer's responsibility. |
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Why is RB5 / UG-10 a critical replacement consideration for a steam turbine?
Because the governor forms part of the turbine speed-control chain. A governor that cannot correctly regulate or position its output mechanism can affect speed response and operating stability. For a production turbine, prolonged troubleshooting or an unsuitable replacement can extend the period before the machine can return to normal operation.
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What makes RB5 / UG-10 different from smaller UG-5.7 or UG-8 versions?
The important distinction is work output and oil pressure. UG-10 is rated at 11.7 ft-lb (15.9 J) and uses 150 psi (1034 kPa) oil pressure, while UG-5.7 and UG-8 use lower work-output ratings and 120 psi (827 kPa). This is why a replacement should be matched to the actual governor configuration rather than selected only by the UG family name.
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How should RB5 / UG-10 output travel be considered when replacing a governor?
UG-10 has a maximum output-shaft travel of 42°. Woodward recommends using approximately two-thirds of the available travel between no-load and full-load positions, leaving overtravel available for shutdown and maximum-fuel requirements. The turbine linkage therefore needs to be checked as part of replacement planning instead of treating the governor as an isolated component.
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Why should RB5 / UG-10 drive alignment be checked before installation?
The governor drive is mechanically coupled to the prime mover. Woodward warns that incorrect alignment, binding, excessive side loading or force pushing the drive shaft into the governor can create serious mechanical problems and may contribute to an overspeed or runaway condition. Correct mounting and coupling are therefore part of safe replacement work.
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What should buyers verify before ordering RB5 / UG-10 for an existing turbine?
Confirm the exact governor configuration, the prime-mover application, drive arrangement, linkage geometry, oil-pressure requirement and the required output travel. For a quotation, provide the complete part number, quantity, destination, required date and machine/system. These details reduce the risk of selecting a governor that belongs to the same general family but does not match the installed mechanical arrangement.
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Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
Amikon - We serve all walks of life in worldwide, help to provide and support their business processes, and adapt to the specific needs of each industry. PLC : Allen Bradley Rockwell, GE FANUC, Schneider Modicon Quantum DCS : ABB, Siemens MOORE, Foxboro, Westinghouse, YOKOGAWA ESD : Triconex, HIMA, Bently Nevada, ICS Triplex Excitation Cards : ABB, GE Marke Sales manager : Jessica | Email : sales3@amikon.cn Mobile : 86-18030235311 | Skype : jessica01235483
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