Reference Manual

18−6
cavitating application. The end user needs to
ensure that there is not a sparger or diffuser
downstream emitting back pressure on the valve.
This will cause cavitation rather than flashing.
Tight shutoff is needed on this application because
it prevents loss of condenser vacuum, loss of
condensate pressure and flow to the deaerator,
and saves money in terms of wasted pump
horsepower.
Design Considerations:
D Cavitation
D Tight shutoff (Class V)
D Typical service conditions are 300-500 psi at
100-150 °F
Typical Specifications:
D easy-e, HP, EH or Cavitrol IV trim
D Cavitrol III Trim
D HTS1 option with Improved Pressure
Balance Seal
D FIELDVUE digital valve controller with low
travel cutoff
Optional:
D NotchFlo or Dirty Service Trim
D Protected Inside Seat
Control Valve Selection
PROCESS FISHER VALVE PRODUCT DESIGN
Valve
Tag #
Water/Steam Power Cycle
V150/
V300
V500
Control
-Disk
E-Body EH HP
Steam
Condi-
tioning
Typical
Valve
Size
Application Description
Control
Function
LV-1 M.P. Heater Drain T S P
2I
LV-2 L.P. Heater Drain T S P
2I
LV-3 Condensate Collection Tank Level T P P
4I
LV-4 Demineralized Make-up Water T P S
4I
FV-1 BFW Regulator T S P
6I
FV-2 BFW Regulator Bypass T S P
2I
FV-3 BFW Pump Recirculation T S P
2I
FV-4 Deaerator Heating Steam T S P
12I
FV-5 Condensate to Deaerator T P S
4I
FV-6 Contaminated Condensate Dump O/O P S
4I
FV-7 Condenser Hotwell Recirculation T P S
2I
FV-8 Condenser/Cooling Tower Water O/O P
18I
FV-9 Sootblower Steam O/O P S
4I
FV-10 High Pressure Steam Vent T S P
4I
FV-11 Superheater Attemperation Water T S P
1I
FV-12 Continuous Blowdown T P (HPA)
1I
FV-13 Intermittent Blowdown O/O P (HPA)
1I
PRV-1
High/Medium Steam Pressure
Reducing
T P S (TBX)
8I
PRV-2
Medium/Low Steam Pressure
Reducing
T P S (TBX)
8I
P=Primary Valve Choice
S=Secondary Valve Choice
T=Throttling Service
O/O=On/Off Service