Data Sheet

EW Valve
D100023X012
Product Bulletin
51.1:EW
August 2012
11
Table 3. Shutoff Classifica tions per ANSI/FCI 70-2 and IEC 60534-4
Valve Seating Shutoff Class
EWD or EWD-1 Metal
II (standard)
III (optional for NPS 6x4 through 12x8 valves)
IV (optional for NPS 6x4 through 12x8 valves with optional multiple graphite piston rings)
EWS or EWS-1 Metal
IV (standard)
V (optional, consult your Emerson Process Management sales office)
EWS PTFE VI
EWT with all except
Cavitrol III cages
PTFE
V (optional)
Metal
IV
V
(1)
EWT with
1-stage Cavitrol III cage
Metal
IV (standard)
V (optional)
EWT with 2-stage Cavitrol III cage
or 2- or 3-stage Cavitrol III cage
Metal or PTFE V
EWT-1 Metal IV
1. Class V shutoff for EWT requires spring-loaded seal ring, radius-seat plug, and wide-bevel seat ring. Not available with 8-inch port, quick-opening cage. Not available with S31600 (316 SST)
valve plug and seat ring (trims 4, 29, 85).
Table 4. C-seal Shutoff Classification
Valve Valve Size, NPS Port Diameter, mm (Inches) Cage Style ANSI/FCI Leakage Class
EWD
(CL300, 600)
6x4x2-1/2 73 (2.875) Eq. %, Linear, Whisper I, Cav III (2-stage)
V t o 593_C (1100_F)
(for port
diameters from
73 through 203.2 mm
(2.875 through 8-inch) with
optional C-seal t rim)
6x4
8x4
111.1 (4.375) Eq. %, Linear, Whisper I, Cav III (1-stage)
8x6
12x6
136.5 (5.375) Whisper III (A3, B3, D3, D3), Cav III (2-stage)
8x6
10x6
(1)
12x6
177.8 (7) Eq. %, Linear, Whisper I, Cav III (1-stage)
10x8
12x8
203.2 (8) Eq. %, Linear, Whisper I, Cav III (1-stage)
1. NPS 10x6 has a valve outlet area identical to the NPS 8x6.
EWT Valve With Cavitrol III Cage
1. Choose a trim combination for the service
conditions according to figure 12, while making sure
from table 15 that this combination provides the
desired trim materials. Then, make sure from table 16
that the valve body/trim temperature limits are not
exceeded.
2. Finally, check in table 20 that packing and other
valve parts are available in materials that meet the
desired service conditions.
EWD, EWS, or EWT Valve With
Whisper Trim III Cage
1. Choose a trim combination for the service
conditions according to figure 15, while making sure
from table 17 that this combination provides the
desired trim materials. Then, make sure from
table18thatthevalvebody/trimtemperaturelimits
are not exceeded.
2. Finally, check in table 20 that packing and other
valve parts are available in materials that meet the
desired service conditions.
EWD-1, or EWT-1 Valve With
Whisper Trim III Cage
1. Choose a trim combination for the service
conditions according to figure 16 or 17, while making
sure from table 19 that this combination provides the
desired trim materials.
2. Finally, check in table 20 that packing and other
valve parts are available in materials that meet the
desired service conditions.