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The WOODWARD 0-9907-2108 is not an actuator or a simple component, but rather a highly specialized safety device known as a QuickTrip overspeed protection system.
WOODWARD 0-9907-2108: QuickTrip Overspeed Protection System
The WOODWARD 0-9907-2108 is a critical safety system designed to provide independent and highly reliable overspeed protection for steam turbines, gas turbines, engines, and other prime movers. It acts as a final layer of defense, detecting dangerously high speeds and initiating a trip (shutdown) to prevent catastrophic equipment failure, potential personal injury, or loss of life.
Product Overview
This part number is part of Woodward’s QuickTrip series, which is known for its high safety integrity level.
- Product Type: Overspeed Protection System / Safety Trip System
- Manufacturer: Woodward
- Part Number: 0-9907-2108
- Model Designation: QuickTrip
- Safety Integrity Level (SIL): This particular model is SIL-3 certified. This is a very high level of safety integrity, indicating a low probability of dangerous failure and suitability for critical safety functions.
- Environmental Rating: It features chemically resistant seals and is rated for Zone 1 & 2 hazardous locations. This means it’s built to withstand harsh industrial environments where flammable gases or vapors may be present, and potentially even present under normal operating conditions (Zone 1).
- Function: Continuously monitors the rotational speed of a prime mover. If the speed exceeds a pre-set limit, the QuickTrip system rapidly initiates a trip signal, typically to a solenoid valve that dumps hydraulic pressure, causing the turbine or engine’s fuel or steam valves to close immediately, thus shutting down the prime mover.
Detailed Product Description
The Woodward 0-9907-2108 QuickTrip is engineered for maximum safety and reliability in the most demanding applications. Key features and characteristics include:
- SIL-3 Certification: Achieving Safety Integrity Level 3 (SIL-3) means the system has been rigorously designed and tested to meet stringent safety standards (e.g., IEC 61508/61511). This level is typically required for applications where the consequences of failure are severe.
- Independent Protection: QuickTrip systems are designed to operate independently of the primary control system (e.g., governor). This separation ensures that even if the main control system fails or malfunctions, the overspeed protection remains active.
- Fast Response: A critical feature of an overspeed protection system is its rapid response time. The QuickTrip is designed to detect and initiate a trip extremely quickly to prevent damage when an overspeed condition occurs.
- Redundant Speed Inputs: To enhance reliability, QuickTrip systems often utilize multiple independent speed sensors (e.g., magnetic pickups) to provide redundant speed signals, preventing a single sensor failure from causing a false trip or missing an actual overspeed event.
- Robust Construction: With chemically resistant seals and Zone 1 & 2 hazardous location ratings, the 0-9907-2108 is built for durability in corrosive or potentially explosive atmospheres common in power plants, oil & gas facilities, and chemical processing plants.
- Self-Diagnostics: Modern safety systems like QuickTrip typically include extensive self-diagnostic capabilities to continuously monitor their own health and alert operators to any internal faults.
- Digital Accuracy: Being a digital system, it offers high accuracy and repeatability in speed sensing and trip point setting.
Technical Specifications (for the 0-9907-2108 QuickTrip)
| Parameter | Value |
| Product Type | Overspeed Protection System |
| Manufacturer | Woodward |
| Part Number | 0-9907-2108 |
| Model Series | QuickTrip |
| Safety Integrity Level (SIL) | SIL-3 certified |
| Hazardous Area Rating | Zone 1 & 2 (with chemically resistant seals) |
| Function | Independent overspeed detection and trip initiation |
| Input | Multiple speed sensor inputs (e.g., magnetic pickups) |
| Output | Trip signal to shutdown device (e.g., solenoid valve) |
| Applications | Steam turbines, gas turbines, diesel/gas engines, prime movers |
| Reference Documentation | Woodward Industrial Products Catalog (Publication 25182) |
Typical Applications
The WOODWARD 0-9907-2108 QuickTrip Overspeed Protection System is vital in any industrial setting where high-speed rotating machinery poses a significant safety risk:
- Power Generation Plants: Essential for protecting large steam and gas turbines in thermal, combined cycle, and nuclear power plants.
- Oil & Gas Industry: Used on gas turbines driving compressors or generators in refineries, pipelines, and offshore platforms.
- Chemical Processing: Protecting turbines and engines in chemical plants where hazardous materials are present.
- Marine Propulsion: Ensuring the safe operation of marine turbines and large engines.
