The WOODWARD 9907-1200, also cataloged as the 9907-1200 Pressure Regulating Valve Control, operates as a dedicated hardware component for closed-loop valve positioning and pressure loop execution within turbine liquid or gas delivery systems.

Hardware Specifications

Actuator Loop Feedback Response and Thermal Dissipation

The control electronics sample valve position feedback and line pressure signals to dynamically calculate drive currents for the pressure regulating valve driver. Internal stabilization algorithms maintain tight control over actuator loop feedback response, eliminating mechanical pressure overshoot during sudden hydraulic load variations. Internal driver stages utilize the heavy-duty enclosure as an integral heat sink, managing thermal heat sink dissipation profiles during continuous high-current valve actuation.

Frequently Asked Questions

Q: How does the unit process pressure feedback signals to prevent valve hunting?

A: The internal processing circuits apply dynamic lag-lead filtering and proportional-integral loop calculations to stabilize actuator loop feedback response, dampening high-frequency pressure spikes and preventing control loop oscillations.

Q: What are the primary grounding requirements for input pressure transducer wiring?

A: All pressure sensor and valve feedback lines must use twisted-shielded pair conductors with the cable shield terminated at a single point on the control unit chassis ground terminal to avoid ground loop current interference.

Field Installation Guidelines

1. Mount the 35.8 x 28.2 x 9.5 cm chassis securely on a flat vertical mounting plate using all four corner mounting holes to handle mechanical vibration.
2. Ensure the main 24 VDC power supply feed is protected by an appropriately rated inline fuse or circuit breaker before energizing the module.
3. Route low-level pressure transducer wiring through grounded metal conduit separate from high-current actuator drive lines.
4. Connect the main chassis ground terminal to the local protective earth grid using a short, heavy-gauge copper grounding jumper.
5. Maintain a minimum surrounding air clearance of 50 mm around the enclosure housing to ensure uninhibited heat dissipation.