Product Overview
The Woodward 9907-1199 is a robust electric-pneumatic current-to-pressure converter meticulously designed to interface electronic control systems with pneumatic actuators in industrial automation environments. As an integral part of Woodward’s 9907 series, the Woodward 9907-1199 transforms precise 4-20 mA DC input signals from PLCs or DCS into proportional 3-15 psi pneumatic output pressures, enabling accurate valve positioning and flow regulation in demanding process control applications. This converter’s core functions revolve around high-fidelity signal conversion with minimal hysteresis, ensuring stable operation for throttle controls, governor linkages, and servo mechanisms where response time and reliability directly impact system performance. Positioned as a cost-effective yet dependable solution within the Woodward ecosystem, the Woodward 9907-1199 delivers exceptional value by bridging analog electrical signals to pneumatic domains, reducing integration complexities and enhancing overall automation efficiency in turbine and compressor setups.
In sophisticated industrial systems, the Woodward 9907-1199 excels through its universal mounting versatility and wide environmental tolerance, supporting seamless deployment in both new installations and retrofits. Its solid-state electronics provide repeatable performance with low power demands, while built-in safeguards against overpressure and signal anomalies protect downstream equipment. This positions the Woodward 9907-1199 as a vital enabler for closed-loop controls, where it facilitates dynamic adjustments to maintain setpoint stability amid varying loads. Engineers rely on its straightforward calibration process, which aligns output spans to specific actuator requirements, minimizing commissioning efforts and operational variances.
The enduring value of the Woodward 9907-1199 manifests in its contribution to predictive maintenance strategies, as consistent signal fidelity helps detect early deviations in pneumatic circuits, averting costly disruptions. By prioritizing affordability without sacrificing durability, this converter empowers facilities to achieve precise process orchestration, fostering safer, more productive operations across energy and manufacturing sectors.
Technical Specifications
| Product Model | 9907-1199 |
|---|---|
| Manufacturer | Woodward |
| Product Type | Electric-Pneumatic Current-to-Pressure Converter |
| Input Signal | 4-20 mA DC |
| Output Signal | 3-15 psi (proportional pneumatic) |
| Input Voltage | 18-30 VDC |
| Operating Temperature | -40°C to +85°C |
| Hysteresis | ≤ 0.5% of span |
| Repeatability | ± 0.3% of span |
| Air Supply Pressure | 20-25 psi (recommended) |
| Mounting | Universal (any orientation) |
| Dimensions | 100 mm x 80 mm x 60 mm |
| Weight | 0.6 kg |
| Enclosure Rating | NEMA 4X equivalent (dust and splash resistant) |
| Power Consumption | < 1 W |
| Certification | CE, RoHS compliant |
Main Features and Advantages
The Woodward 9907-1199 employs advanced piezoresistive sensing technology to achieve superior linearity in signal conversion, with hysteresis limited to 0.5% of span, ensuring that pneumatic outputs mirror electrical inputs with exceptional fidelity even under fluctuating supply pressures. This precision minimizes actuator drift, allowing for tighter control loops in fuel admission systems where even minor deviations can affect efficiency or safety margins.
Compact and adaptable design: Its diminutive footprint of 100 x 80 x 60 mm and universal mounting brackets enable effortless integration into space-constrained enclosures or field-mounted setups, accommodating horizontal, vertical, or inverted orientations without performance degradation. For the Woodward 9907-1199, this flexibility proves invaluable in retrofitting legacy pneumatic controls, slashing installation costs while maintaining compatibility with standard DIN rails or pipe stands.
Environmental fortitude: Rated for -40°C to +85°C operations, the Woodward 9907-1199 withstands extreme thermal cycles, vibration, and humidity common in turbine halls or offshore platforms, thanks to its rugged epoxy-sealed housing that repels contaminants and corrosion. This resilience extends mean time between failures (MTBF) beyond 100,000 hours, offering a compelling advantage over fragile electromechanical alternatives.
Simplified diagnostics and maintenance: Integrated LED indicators signal input validity and output status at a glance, while the unit’s overrange protection—up to 42.5 VDC—prevents damage from transient spikes. The Woodward 9907-1199 supports zero and span adjustments via accessible potentiometers, empowering on-site tuning without specialized tools, which accelerates commissioning and troubleshooting.
At the heart of the Woodward 9907-1199‘s appeal is its balance of economy and reliability, delivering 0.3% repeatability at a fraction of premium converter costs. This democratizes high-performance pneumatics for mid-tier applications, enabling users to enhance system responsiveness, reduce energy waste through precise modulation, and comply with emission standards effortlessly. In an era of tightening operational budgets, the Woodward 9907-1199 stands as a strategic asset, optimizing throughput while safeguarding investments in automated processes.
Application Field
In gas turbine power generation, the Woodward 9907-1199 drives variable geometry actuators for inlet guide vanes, converting governor commands into pneumatic pressures that fine-tune airflow during load ramps, mitigating surge risks and stabilizing combustion under variable grid demands. This application resolves signal latency issues in remote supervisory controls, ensuring rapid response to frequency fluctuations and enhancing fuel efficiency in peaking plants.
Marine propulsion systems harness the Woodward 9907-1199 to modulate fuel rack positions on diesel engines, where its wide temperature tolerance handles engine bay heat while delivering proportional outputs for throttle precision amid rolling seas. By interfacing with electronic engine management units, it addresses vibration-induced signal noise, promoting smoother acceleration and reduced wear on high-horsepower shafts in naval or commercial vessels.
Petrochemical refineries deploy the Woodward 9907-1199 in anti-surge control for centrifugal compressors, translating 4-20 mA recycle valve signals into reliable pneumatic strokes that prevent stall conditions during process upsets. Its low hysteresis supports antisurge map adherence, solving overmodulation problems in multi-stage compression and minimizing recycle gas losses for sustained throughput.
Within industrial steam systems, the Woodward 9907-1199 positions desuperheater spray valves to regulate superheat temperatures, interfacing boiler controls with water injection actuators for uniform steam quality in turbine feeds. This targeted use counters thermal stratification in headers, averting tube failures and enabling consistent power output in cogeneration facilities.
The Woodward 9907-1199 consistently tackles integration bottlenecks in hybrid electro-pneumatic architectures, from emissions-compliant engine retrofits to precision fluid handling in food processing, delivering adaptive control that bolsters safety, cuts operational variances, and aligns with sustainability goals through optimized resource utilization.
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