Desuperheaters With an Integral Spray Control Valve

The LPD Large Pipe Desuperheater is designed for steam pipes 6 inches and larger. Its probe-type variable nozzle control valve and desuperheater arrangement are intended for large-pipe applications in power plants and process plants. Final selection should consider the steam system, installation arrangement, operating conditions, and required control performance.

The LPD uses a 90° flanged insertion into the steam pipe. This installation method places the probe-type assembly into the steam line while providing a flanged connection for the installation arrangement. Customers should provide relevant piping and operating information so the application can be reviewed for fit, orientation, and system requirements.

The LPD is offered in ASME B16.34 pressure classes 150, 300, 600, 900, 1500, 2500, and 2700. The appropriate class depends on the steam-system design and operating conditions. B-Tech Valve can review application information to help identify a suitable configuration for the piping, pressure requirements, and plant service.

The LPD is temperature rated up to 1200°F (650°C). This supports high-temperature steam applications where conditioning is needed to improve heat transfer or protect downstream components. Actual selection should account for the complete operating envelope, including steam conditions, piping requirements, pressure class, and the intended plant application.

These desuperheaters are used in power plants and process plants for applications such as increasing steam heat-transfer capability, protecting piping and steam traps, protecting rotating seals, increasing steam flow, and decreasing boiler loads. They can also support efforts to reduce fuel costs when properly selected and applied within the steam system.

Selection typically requires the steam-pipe size, installation arrangement, operating pressure and temperature, desired pressure class, and the application objective. Information about steam flow and control requirements is also useful when reviewing a variable nozzle design. B-Tech Valve provides application-engineering guidance for power and process plant customers evaluating desuperheater configurations.