PRD18 Positive Pressure Relief Door
The PRD18 positive pressure relief door is designed to open automatically to prevent exploding ductwork in the event dampers close while the fan is still operating. It:
- Opens outward at a specified pressure setting relieving pressure within the duct to equalize the pressures.
- Automatically closes and resets when the pressure is equalized or the system shuts down.
- Is constructed of galvanized steel.