Brochure
Boiler Feedpump Recirculation Valve
Fisher
®
Power Solutions | 9
The boiler feedpump recirculation valve faces some
of the toughest conditions of any control valve in a
power plant. The boiler feedpump takes its suction
from the deaerator at relatively low pressure, and
increases the pressure to approximately 10% above
the main steam pressure. During startup or low load
conditions, ow to the boiler may not be adequate
to meet the minimum ow requirements of the
boiler feedpump.
Fisher boiler feedpump recirculation valves protect
the feedpump by ensuring adequate ow is passing
through the pump at all times. They are engineered
to handle extreme cavitation caused by high
temperatures and pressure drops. Where issues
with ow accelerated corrosion exist, Fisher boiler
feedpump recirculation valves allow high levels of
entrained particulate to pass.
PRODUCT FEATURES
nControls pressure drops up to 586 bar (8,500 psi).
nAdvanced sealing technology provides tight shutoff and extends service life.
n High turndown handles extreme flow rates.
n Anti-cavitation trim reduces noise and vibration for extended service life.
n Characterized cage provides low-ow cavitation protection during initial operation and necessary ow as
pressure rises.
nOptional trim allows passing of 19 mm (.75 inch) particulate.
n Globe and angle body designs available.
n Pneumatic piston actuator provides highly accurate step positioning and stable valve response.