Data Sheet

EW Valve
D100023X012
Product Bulletin
51.1:EW
August 2012
13
Fisher TSO (Tight Shutoff) Trim Capabilities
See figure 6 and tables 8, 9, and 10. For additional information contact your Emerson Process Management sales
office.
Table 8. TSO (Tight Shutoff) Leakage Class
Leakage Class Maximum Leakage Test Medium Test Pressure Test Procedure
TSO (Tight Shutoff)
Valves with TSO trim are factory
tested to a more stringent Fisher test
requirement of no leakage at time of
shipment.
Water Service P
(1)
ANSI/FCI Class V test procedure B
1. Specify service  Pwhenordering.
Table 9. TSO Shutoff A vailability
VALVE CONSTRUCTION
EWT Std or Cavitrol III trim. Replaceable, protected soft seat
Table 10. Port Diameters, Valve Plug Travel, Yoke Boss Diameters for TSO (Tight Shutoff) Trim
VALVE TRIM
MAX
TRAVEL
YOKE BOSS SIZE PORT DIAMETER
C
V
REDUCTION AT 100%
TRAVEL
(1)
UNBALANCE
AREA
mm Inch mm Inch
Nominal Actual TSO
mm Inch mm Inch Inch
2
EWT NPS 6x4 Std 50.8 2 90 3-9/16 111 4.375 106 4.1875
4% (linear)
3% (equal percent)
0.154
EWT NPS 8x6
and 10x6
(2)
Std
50.8 2
90
127
3-9/16
5
179 7 173 6.8125
2%
0.30
102 4 90 3-9/16 2%
1. This column lists the percent reduction of published maximum C
V
of the trim listed in the TRIM column.
2. NPS 10x6 has a valve outlet area identical to the NPS 8x6.
Installation
Unless limited by seismic criteria, the valve body can
be installed in any position (as long as sufficient
support is provided if a fabricated extension bonnet is
used). However, the normal method is with the
actuator vertical above the valve, since nonvertical
positionsmaycauseuneventrimwearanddecreased
trim life.
Flow through the valve body must be in the direction
indicated by the flow direction arrow on the valve
body. Consider installing an upstream strainer,
especially if the valve body includes slotted or
multihole Whisper Trim or Cavitrol cages.
Dimensions are shown in figure 20.