Mechanical Spray Desuperheaters for Steam Lines

The SPAD Small Pipe Attemperator Desuperheater and Steam Attemperator use a fixed-nozzle spray-ring design that clamps between two steam pipe flanges. Both are fed water from a separate temperature control valve. The Steam Attemperator is sized for each customer’s application, while the SPAD is identified for small-pipe service by B-Tech Valve.

The LPD Large Pipe Desuperheater is a probe-type assembly with a variable-nozzle, fully actuated control valve and desuperheater. It is designed for steam pipes 6 inches and larger and installs through a 90-degree flanged insertion. The design supports steam conditioning while helping protect piping, steam traps, rotating seals, and other downstream equipment.

The listed products are available in ASME B16.34 pressure classes 150, 300, 600, 900, 1500, 2500, and 2700. The appropriate class depends on the steam system and application requirements. B-Tech Valve can use the line conditions and equipment details provided by the customer to support product selection and application sizing.

The SPAD, Steam Attemperator, and LPD product information identifies temperature ratings up to 1200°F (650°C). Actual selection should account for the steam conditions, piping arrangement, pressure class, water supply, and control requirements. Customers should provide application data so B-Tech Valve can review the suitability of the selected design.

These desuperheaters are used in power plants and process plants to condition steam and increase its heat-transfer capability. Product applications also include protecting piping and steam traps, protecting rotating seals, increasing steam flow, decreasing boiler loads, and reducing fuel costs where the system design supports those objectives.

Selection considers steam pipe size, pressure class, temperature, desired steam condition, installation arrangement, available water supply, and control requirements. Fixed-nozzle spray-ring designs clamp between steam pipe flanges, while the LPD uses a variable-nozzle probe installation for pipes 6 inches and larger. B-Tech Valve provides application-sized solutions based on project information.