Desuperheater Valves for Power and Process Steam

The SPAD is a small-pipe attemperator with a fixed-nozzle spray-ring design that clamps between two steam-pipe flanges. The LPD is a large-pipe, probe-type desuperheater with a variable-nozzle, fully actuated control valve and 90-degree flanged insertion. B-Tech Valve identifies the LPD for steam pipes 6 inches and larger and the SPAD for smaller steam piping.

The product range is available in ASME B16.34 pressure classes 150, 300, 600, 900, 1500, 2500 and 2700. Availability depends on the selected product and configuration. Reviewing the steam-system design, pipe connection, operating pressure and temperature helps determine the suitable pressure class for a new valve or replacement component.

The listed desuperheater valves and replacement parts are rated for temperatures up to 1200°F (650°C). Actual suitability should be confirmed against the complete steam-system conditions, including pressure, temperature, water supply, pipe size and control requirements. B-Tech Valve can review application information when selecting or sizing a product.

The SPAD and Steam Attemperator use water supplied from a separate temperature control valve. Their fixed spray-ring and nozzle arrangement is installed between steam-pipe flanges, allowing water injection into the steam flow. Final application suitability depends on the available water supply, steam conditions, pipe arrangement and required temperature control.

B-Tech Valve offers replacement parts for desuperheater valves, including American-made components compatible with ASME B16.34 pressure classes from 150 through 2700 and temperatures up to 1200°F (650°C). The parts are intended for applications such as steam-trap protection, rotating-seal protection and steam-flow optimization. Product selection should match the existing valve and service conditions.

The products are used in power plants and process plants, including power-plant steam systems, process-plant steam systems, industrial boiler and cogeneration applications, refineries, chemical facilities, pulp and paper facilities, and related high-temperature steam systems. Applications include steam attemperation, equipment protection, heat-transfer improvement and boiler-load reduction.