Pressure Reducing & Desuperheating (PRDS) Systems
Pressure Reducing and Desuperheating (PRDS) systems reduce high-pressure, high-temperature steam to a lower pressure and controlled temperature suitable for downstream process or heating use. Navjivan Valves supplies pilot-operated, self-contained, direct-acting and combined PRDS systems.
Product Overview
A PRDS combines pressure reduction with desuperheating (water injection to control outlet steam temperature) in a single integrated system, commonly used where boiler steam pressure and temperature are higher than what a downstream process or heat exchanger requires. Correctly specified PRDS systems improve energy efficiency, protect downstream equipment, and provide stable steam conditions to the process.
Types of PRDS Systems
Pilot-Operated PRDS Systems
Use a pilot control mechanism to precisely regulate the main pressure-reducing valve, offering tight pressure control across varying load conditions.
Self-Contained PRDS Systems
Integrate the pressure-sensing and control function within the valve itself, without requiring external instrumentation or power, suitable for simpler installations.
Direct-Acting PRDS Systems
The simplest configuration, where the downstream pressure acts directly on a spring-loaded mechanism to regulate the valve position.
Combined PRDS Systems
Integrate pressure reduction and desuperheating functions into a single valve body, reducing installation footprint and piping complexity.
Specifications
| Function | Combined steam pressure reduction and temperature control (desuperheating) |
|---|---|
| Configurations | Pilot-operated, self-contained, direct-acting, combined |
| Typical Service | High-pressure/high-temperature steam reduced to process conditions |
Specifications reflect the products currently supplied by Navjivan Valves. Exact availability may vary by size and material — please confirm with our team for your specific requirement.
Applications
- Steam Distribution Systems
- Power Plants
- Process Heating
- Petrochemical Plants
- Pharmaceutical & Food Processing
- District Heating
Materials of Construction
PRDS systems are specified per project requirements, with body materials and internals selected according to the steam pressure, temperature and desuperheating water quality.
Key Features
- Combines pressure reduction and desuperheating in one integrated system
- Pilot-operated designs give tight control across varying steam loads
- Self-contained and direct-acting options available for simpler installations
- Improves downstream equipment protection and steam system efficiency