Brochure

Reheat Spray Valve
Sootblower Valve
Varying load requirements cause varying steam
temperatures. In order to ensure optimum heat rate and to
protect the steam turbine, the steam temperature in the
superheat sections of the boiler must be controlled.
Fisher superheat spray valves accurately control the
amount of water injected into the steam attemperator or
cooler, providing optimal main steam temperature control
and stability. This prevents damage to the turbine and
results in efcient turbine operation.
When ring fuels such as coal, oil, or other waste
products, degradation of the boiler tubes becomes a
concern. Deposits from the combustion process can
collect on the heat exchanging tubes, which reduces
thermal efciency and may cause operational problems.
Fisher sootblower valves provide steam to the
sootblower system to remove deposits from the boiler
tubes while withstanding high pressure, high vibration,
and thermal cycling to maintain unit efciency.
To increase the thermal efciency of a steam generator
and improve the overall heat rate of a unit, a reheater
is incorporated in the power cycle. This is a particularly
challenging application and requires a reheat spray valve
to maintain precise reheat temperature control.
Fisher reheat spray valves provide optimal hot reheat
steam temperature control and high rangeability, while
minimizing the damaging effects of cavitation.
The Main Steam System
Superheat Spray Valve
10 | Fisher
®
Power Solutions
PRODUCT FEATURES
n High rangeability for excellent system control.
n Advanced sealing technology provides Class V shutoff and extends service life.
n Customized sootblower trim reduces noise and withstands heavy vibration.
n Anti-cavitation trim reduces noise and vibration.