Steam Desuperheaters Built and Tested in the USA

Desuperheating means reducing superheated steam temperature toward a required operating condition by spraying a controlled amount of water into the steam. The water absorbs heat as it evaporates, conditioning the steam for equipment and process use. B-Tech Valve products use fixed spray-ring or variable-nozzle designs, with water supplied through a separate temperature control valve where applicable.

B-Tech Valve offers the SPAD Small Pipe Attemperator Desuperheater, Steam Attemperator, and LPD Large Pipe Desuperheater. SPAD and Steam Attemperator models use fixed-nozzle spray rings with flange clamp mounting. The LPD uses a probe-type variable-nozzle, fully actuated control valve and desuperheater assembly for steam pipes 6 inches and larger.

Installation depends on the product design. SPAD and Steam Attemperator models clamp between two steam pipe flanges. The LPD Large Pipe Desuperheater uses flanged insertion at 90 degrees on the steam pipe. Application details, pipe arrangement, pressure class, and operating temperature should be reviewed during product selection.

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 design and operating conditions. B-Tech Valve can provide application guidance for selecting a suitable desuperheater configuration and pressure class.

The listed desuperheater and attemperator products are temperature rated up to 1,200°F (650°C). Actual selection should also consider steam conditions, water injection requirements, pipe size, pressure class, and downstream equipment protection. B-Tech Valve sizes products for the customer’s application when the required operating information is provided.

Applications include fossil and HRSG power plants, process plants, refineries, industrial boiler and cogeneration steam plants, and other facilities conditioning high-temperature steam. Typical objectives include improving heat transfer, increasing steam flow, protecting piping and seals, reducing boiler loads, and reducing fuel costs. Product selection is based on the steam system and installation requirements.