Data Sheet

EW Valve
D100023X012
Product Bulletin
51.1:EW
August 2012
18
Figure 11. Detail of 2-Stage Cavitrol III Cage i n CL300
or 600 Fisher EWT Valve
W3331-1
CAGE
RETAINER/
BONNET
SPACER
Figure 12. Typical Trim Used in Cavitrol III Cage
Constructions with Steel or Stainless Steel Valves
(see tables 15)
NOTE:
DO NOT EXCEED THE MAXIMUM PRES SURE AND TEMPERATURE FOR THE
CLASS RATING OF THE BODY MATERIAL USED, EVEN THOUGH THE TRIMS
SHOWN MAY HAVE HIGHER CAPABILITIES.
A2732
PRESSURE DROP, PSI
PRESSURE DROP, BAR
LIQUID TEMPERAT URE, F
LIQUID TEMPERATURE, C
Table 15. Cavitrol III
(1)
Metal Trim Part Combination
Trim
Designation
Valve Plug Cage Cage Retainer
(2)
Seat Ring
76 Heat-treated S42000 (420 SST)
S17400 (17-4PH SST) with
H900 heat-treat condition
S31600 (316 SST)
S17400 with H900
heat-treat condition
1. Available only in EWT valve.
2. Not used in NPS 12x8 or 8x6 CL900 valves.
Table 16. Cavitrol III Valve Body/Trim Temperature Capabilities
TRIM
DESIGNATION
FROM TABLE 15
VALVE BODY and BONNET
MATERIAL TEMPERATURE
CAPABILITY
_C _F
Min Max Min Max
76
WCC carbon steel or WC9 chrome moly steel -29
These materials not
limiting factors
-20
These materials not
limiting factors
LCC carbon steel -46 -50
S31600 (316 SST)
NPS 4x2 valve
NPS 6x4 valve
NPS 8x4 valve
-29
-29
-29
204
149
135
-20
-20
-20
400
300
275
NPS 8x6 or 10x6
(1)
valve
(2)
NPS 12x6 valve
NPS 12x8 valve
(3)
-29
-29
-29
121
107
177
-20
-20
-20
250
225
350
1. NPS 10x6 has a valve outlet area identical to the NPS 8x6.
2. This valve body/trim combination not available in CL900 valve.
3. This valve body/trim combination available in all NPS 12x8 rating classes.