Desuperheaters for US Sugar Mills

Desuperheaters help control steam temperature before it reaches downstream equipment. This can protect piping, steam traps, and rotating seals from excessive heat exposure. B-Tech Valve designs include fixed-nozzle spray-ring units and probe-type variable-nozzle units, allowing the equipment arrangement to be matched to the application and steam piping configuration.

B-Tech Valve offers the SPAD Small Pipe Attemperator Desuperheater, a fixed-nozzle spray-ring design that clamps between two steam pipe flanges, and the LPD Large Pipe Desuperheater, a probe-type variable-nozzle control valve and desuperheater for pipes 6 inches and larger. The Steam Attemperator is also a fixed-nozzle spray-ring design.

The listed desuperheater designs are available in ASME B16.34 pressure classes 150, 300, 600, 900, 1500, 2500, and 2700. The appropriate class should be selected against the steam system’s design and operating requirements. B-Tech Valve can provide application guidance when reviewing line conditions and equipment specifications.

The listed SPAD, Steam Attemperator, and LPD products are temperature rated up to 1,200°F (650°C). Actual application suitability should be confirmed against the mill’s steam conditions, piping arrangement, pressure class, water supply, and downstream equipment requirements before specifying a unit.

The SPAD uses a fixed-nozzle spray ring and clamps between two steam pipe flanges, making it suited to small pipe applications. The LPD uses a probe-type variable nozzle with a fully actuated control valve and inserts at 90° into the steam pipe. The LPD is designed for pipe sizes 6 inches and larger.

The SPAD and Steam Attemperator are fed water from a separate temperature control valve. Their fixed spray-ring arrangements introduce water into the steam flow for temperature conditioning. The LPD combines a variable-nozzle control valve and desuperheater in one assembly. Water-control requirements should be reviewed with the application and operating conditions.