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Help CenterWoodward 9904-802 Pressure-Reducing Speed Regulator
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I. Core Positioning and Replacement Compatibility
Product Positioning: Stainless steel screw-type mechanical-hydraulic speed reduction governor of the TG17 series, designed for speed control of 2400 rpm asynchronous turbomachinery, providing stable speed regulation and load adaptability.Replacement Model: Interchangeable with the old TG17 (2400 rpm) governor of the same series, with consistent mounting and interface compatibility, and compliant with ATEX explosion-proof standards.Key Identification: 9904-802 TG17 (2400 RPM) ATEX COMPLIANT, Stainless Steel Screw, OTSD-free, output rotation direction tailored to specific working conditions.
II. Working Principle and Structure
Speed Regulation Mechanism: The drive shaft senses the rotor speed, compares it with the internal set value, and controls the speed control valve via the rotating output shaft to adjust steam/fluid flow for stable speed maintenance.Structural Design: Equipped with a stainless steel screw-type actuator and a die-cast aluminum housing, featuring corrosion resistance, vibration resistance and long service life, suitable for harsh industrial environments.Operation Logic: Adopts speed reduction regulation mode without synchronization (constant speed) function, adapted to variable load working conditions, and achieves closed-loop control through mechanical-hydraulic feedback.
III. Technical Parameters
| Parameter Item | Value | Remarks |
|---|---|---|
| Rated Speed | 2400 rpm | Optimized operating point |
| Maximum Speed | 2900 rpm | Instantaneous upper limit |
| Minimum Speed | 1800 rpm | Stable operating lower limit |
| Idle Speed | 2010 rpm | No-load idle setting |
| Overspeed Setting | 1200 rpm | Speed reduction regulation threshold |
| Output Rotation Direction | Tailored to Working Conditions | Matched on demand |
| Structural Type | Stainless Steel Screw | Stainless steel screw-type |
| Explosion-Proof Certification | ATEX Compliant | Meets EU explosion-proof standards |
| Overspeed Test Device (OTSD) | None | OTSD function not supported |
| Compatible Model | TG17 (2400 rpm) of the Same Series | Direct replacement with compatible interfaces |
IV. Installation and Maintenance
Installation Compatibility: Compatible with the TG17 (2400 rpm) governor of the same series, with identical mounting holes, drive shaft and output shaft interfaces for direct replacement.Lubrication Requirements: Use special lubricating grease; regularly inspect the lubrication status of the screw mechanism and bearings to prevent jamming.Maintenance Cycle: It is recommended to conduct action calibration and leakage inspection every 6 months to ensure regulation accuracy and response speed.Environmental Adaptability: Operating temperature ranges from -40°C to +85°C, IP54 protection grade, with vibration and impact resistant design, suitable for industrial sites.
V. Application Scenarios
Suitable for 2400 rpm turbine-driven equipment without the need for synchronous operation, including:
Pumps, compressors/turboexpanders
Pressure and inlet draft fans
Off-grid generators, industrial steam turbines, etc.
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