Woodward UG‑10D (8521‑0136) Universal Mechanical‑Hydraulic Governor for Reciprocating Engines & Steam Turbines

Description

Woodward UG‑10D (8521‑0136) Universal Mechanical‑Hydraulic Governor for Reciprocating Engines & Steam Turbines

Product Details

The UG‑10D, part number 8521‑0136, is classic self‑contained mechanical‑hydraulic universal governor from Woodward. Origin: USA. Lifecycle status: EOL discontinued, no new original factory production; market stock mainly consists of NOS surplus, overhauled & fully tested refurbished units for power generation and oil‑gas field maintenance projects.

This governor features integrated internal oil pump and reservoir, driven by engine/turbine shaft via dedicated drive gear. Supports isochronous (constant speed) and droop mode operation. It controls fuel rack position for diesel, gas, dual‑fuel engines or steam turbine steam valves, stabilizes rotating speed under variable load conditions. Actuator output stroke 22 mm, output torque sufficient for large engine fuel linkage. Weight approx 4.3 kg. No external hydraulic power source required. Multiple adjustment knobs on front panel for speed setting, droop adjustment, gain and stability tuning. Widely deployed on generator sets, gas compressor drives, marine main engines and steam turbines.

Applications

‑ Diesel / gas generator set prime mover speed control ‑ Oil‑gas pipeline gas‑compressor engine governing ‑ Industrial reciprocating engine and steam turbine speed regulation ‑ Marine propulsion and auxiliary generator engine control ‑ Power plant emergency backup genset legacy equipment maintenance ‑ Retrofit & spare‑part replacement for existing UG‑series governor systems ‑ Field overhaul inventory for engine‑governor service workshops

8521-0136

Related Series Models (6+)

1. 8521‑0312 (UG‑10D alternate part number)
2. UG‑8 (Small‑size mechanical hydraulic governor)
3. UG‑15 (High‑output torque variant)
4. PG‑PL (Compressor‑specialized mechanical governor)
5. 9907‑1200 (Woodward digital controller)
6. 505 / 505E digital turbine controller
7. 2301A load‑sharing controller

Key Features

1. Self‑contained mechanical‑hydraulic governor with built‑in oil pump and oil reservoir, no external hydraulic supply required.
2. Dual operation mode: isochronous constant‑speed for generator sets, droop mode for parallel gensets and compressor drives.
3. Front‑panel manual adjustment for speed setpoint, droop, sensitivity and stability parameters.
4. Robust heavy‑duty mechanical construction, high shock and vibration resistance for engine‑mount installation environment.
5. Large output torque, directly drives engine fuel rack or turbine steam valve linkage.
6. Driven by equipment shaft via dedicated UG drive gear assembly.
7. Manufactured in USA; EOL obsolete, only NOS or overhauled tested spare‑parts available.
8. Worldwide service network supports overhaul, calibration and spare‑component supply for legacy UG‑series units.

Main Functions

1. Continuously sense shaft rotational speed via mechanical drive input, compare actual speed against setpoint.
2. Adjust fuel rack / steam valve position, stabilize engine or turbine rotating speed under varying load conditions.
3. Realize isochronous constant‑speed control for standalone generator units, maintain stable output frequency.
4. Droop mode enables safe parallel operation of multiple generator sets or compressor prime movers.
5. Manual local speed adjustment via front‑panel knob for commissioning and on‑site tuning.
6. Built‑in hydraulic damping ensures stable operation, suppress speed oscillation under load fluctuation.
7. Cooperate with external stop mechanism to realize emergency overspeed shutdown protection logic.
8. Serve as core speed‑governing component for legacy large‑bore reciprocating engines and steam‑turbine prime‑mover systems.