Brochure

Turbine Bypass
Fisher
®
Pulp and Paper Solutions | 31
Product Solutions
As with any superheated steam cycle, the temperature of the superheat needs to be controlled to ensure that it does not exceed the material
limits of the process equipment. Temperature control is accomplished by use of an attemperator or desuperheater that injects a controlled
amount of cooling water into the superheated steam ow.
Ring and insertion style attemperators are designed to work in conjunction with supporting superheat and reheat control valves. This system
prevents damage to the process equipment and extends its service life. Some attemperators use anti-ashing nozzles to provide the required
amount of water needed for accurate temperature control.
Steam Conditioning
Power and Steam Cycle
n HIGH RANGEABILITY Water ange connections offer high rangeability for excellent system control.
n HIGH TEMPERATURE CAPABILITIES Materials and design are suitable for temperatures up to 593° C (1100° F).
n EXTENDED SERVICE LIFE Some insertion style attemperators use vortex shedding technology to minimize
vibration and extend service life.
n TEMPERATURE CONTROL Variable geometry spray nozzles ensure complete mixing and rapid vaporization
of spraywater.
Fisher TBX steam conditioning control valve and 585 CLS actuator Fisher DMA/AF-HTC Insertion Style Desuperheater
Power and Steam Cycle