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
nControls pressure drops up to 586 bar (8,500 psi).
nAdvanced 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.
nOptional 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.