HRSG Attemperators for Combined Cycle Plants

B-Tech Valve offers fixed-nozzle spray-ring designs and probe-type variable-nozzle designs. The SPAD Small Pipe Attemperator Desuperheater uses a spray ring and flange clamp mounting, while the LPD Large Pipe Desuperheater uses a variable-nozzle actuated control valve with flanged insertion for larger steam piping.

Attemperators are selected according to the steam system and application. Relevant considerations include pipe size, pressure class, operating temperature, water supply, installation arrangement, and required steam conditioning performance. B-Tech Valve states that its Steam Attemperator is sized for each customer's application.

The listed attemperator and desuperheater products are available in ASME B16.34 pressure classes 150, 300, 600, 900, 1500, 2500, and 2700. Final selection should match the plant piping specification and operating requirements.

The listed products are rated for temperatures up to 1200°F (650°C). Actual suitability depends on the complete steam system, operating conditions, materials, installation details, and the selected product configuration.

The SPAD is a small-pipe spray-ring desuperheater that clamps between two steam pipe flanges and is suited to smaller piping. The LPD is a probe-type variable-nozzle control valve and desuperheater for pipe sizes of 6 inches and larger, with 90-degree flanged insertion.

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). Parts are stocked in-house for quick turnaround availability.