Data Sheet

EW Valve
D100023X012
Product Bulletin
51.1:EW
August 2012
12
Table 5. Fisher EWD, EWS, and EWT Metal Trim Part Combinations
(1)
Except for Valves with Cavitrol III or Whisper
Trim III Cages
TRIM DESIGNATIONS VALVE PLUG CAGE
SEAT
Disk Seat, Retainer for PTFE
Seat Constructions
Seat Ring for Metal Seat
Constructions
1 (standard trim for all valves except
EWT and those in CF8M. Trim 57 is
standard for EWT. Trim 29 is standard
for all valves in CF8M)
S41600 heat treated CB7CU-1 (S17400)
heat treated
---
J S41600 or CA15
(5)
(S41000) for
EWD, EWS
J CA6NM for EWD-1,
EWS-1, EWT-1
3and3H
(2)
S31600 w/seat and
guide hard faced
w/CoCr-A
hardfacing alloy
R30006 (alloy 6)
(3)
S31600 w/seat hard faced
w/CoCr-A hardfacing alloy
(4)
S31600
w/seat hard faced w/CoCr-A
hardfacing alloy
(4)
4
(6)
S31600 CB7CU-1 (S17400)
heat treated
S31600 S31600
27 S31600 w/seat and
guide hard faced
w/CoCr-A
hardfacing alloy
CF8M w/electroless
nickel coating
(ENC)
S31600 w/seat hard faced
w/CoCr-A hardfacing alloy
(4)
S31600 w/seat hard faced
w/CoCr-A hardfacing alloy
(4)
29
(6)
(standard for all valves
in CF8M)
S31600 CF8M w/electroless
nickel coating (ENC)
S31600 S31600
37 and 37H
(2)
S31600 w/seat and
guide hard faced
w/CoCr-A
hardfacing alloy
CB7CU-1 (S17400)
heat treated
S31600 w/seat hard faced
w/CoCr-A hardfacing alloy
(4)
S31600 w/seat hard faced
w/CoCr-A hardfacing alloy
(4)
57 (standard for all EWT valve bodies
in all materials except CF8M)
S41600 heat treated CB7CU-1 (S17400)
heat treated
S31600 ---
1. Nonferrous alloy combinations are also available. Consult your Emerson Process Management sales office for details.
2. Trims 3H and 37H have clearances for high-temperature service.
3. Available only in linear, quick-opening, equal percentage, and Whisper Trim I cages.
4. Solid cast alloy 6 seat ring is used instead for NPS 4x2, 10x8, and 12x8 valve s izes.
5. CA15 is used for NPS 8x6 CL900 EWD and EWS.
6. Not for use with Whisper Trim I with 5-3/8inchandlargerports.
ANSI/FCI Class VI Shutoff Capabilities
EWS valves with metal seat constructions and EWT valves with soft seat and metal seat constructions can provide
ANSI/FCI Class VI shutoff capabilities. See tables 6 and 7.
Table 6. Class VI Shutoff Availability
Valve Port Size, Inches Seat Minimum Seat Load
EWS
± 7
Metal 300 lbs/lineal inch
EWT
² 3.4375 ± 7
Soft See Catalog 14
EWT
² 3.4375 ± 7
Metal 300 lbs/lineal inch
Table 7. Class VI Trim Materials
VALVE CAGE VALVE PLUG SEAT RING SEAL RING
TRIM TEMPERATURE LIMIT
_C _F
EWS
S31600 (316 SST)
/ENC
S31600/CoCr-A
(alloy 6) seat
S31600 NA Not a limiting factor
EWT
S31600 / ENC S31600 S31600/PTFE UHMWPE
(1)
R30003 -29 to 66 -20 to 150
S31600 / ENC S31600/CoCr-Aseat S31600 UHMWPE R30 003 -101 to 66 -150 to 150
S17400 (17-4PH SST) S41600 S31600/PTFE UHMWPE R30 003 -29 to 66 -20 to 150
S17400 S41600 S31600 UHMWPE R30003 -29 to 66 -20 to 150
1. UHMWPE (Ultra High Molecular Weight Polyethylene)