Instruction Manual
D100399X012
EW Valve
July 2017
4
Table 2. Shutoff Classification Per ANSI/FCI 70‐2 and IEC 60534‐4
Valve Seating Shutoff Class
EWD Metal
II (standard)
III (optional for NPS 6x4 through 12x6 valves with optional single graphite piston ring or for
NPS 10x8 and 12x8 valves with optional double piston rings)
IV (optional for NPS 6x4 through 12x8 valves with optional multiple graphite piston rings)
EWS Metal
IV (standard)
V (optional, consult your Emerson sales office or Local Business Partner)
EWS PTFE VI
EWT with all except
Cavitrol III cages
PTFE
Standard Air Test (maximum leakage is 0.05 mL/min/psid/inch port diameter)
V (optional)
Metal IV (standard)
Metal V (optional)
(1)
EWT with
1‐stage Cavitrol III cage
Metal
IV (standard)
V (optional)
EWT with 2‐stage Cavitrol III cage Metal V
1. Class V shutoff for EWT requires spring loaded seal ring, radius‐seat plug, wide‐bevel seat ring, and seat lapping. Not available with 8‐inch port, quick‐opening cage. Not available with
S31600 (316 SST) valve plug and seat ring.
Table 3. Additional Shutoff Classification for C‐seal Trim Per ANSI/FCI 70‐2 and IEC 60534‐4
Valve Valve Size, NPS Port Diameter, Inches Cage Style Leakage Class
EWD
(CL300, CL600)
6x4x2‐1/2 2.875
Equal Percentage, Linear, Whisper I,
Cavitrol III (2‐stage)
V (for port
diameters from 2.875
through 8‐inch with
optional C‐seal trim)
6x4
8x4
4.375
Equal Percentage, Linear, Whisper I,
Cavitrol III (1‐stage)
8x6 and 12x6 5.375 Whisper III (A3, B3, D3, D3), Cavitrol III (2‐stage)
8x6
12x6
7
Equal Percentage, Linear, Whisper I,
Cavitrol III (1‐stage)
10x8
12x8
8
Equal Percentage, Linear, Whisper I,
Cavitrol III (1‐stage)
Educational Services
For information on available courses for the Fisher EW valve, as well as a variety of other products, contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: 1-641-754-3771 or 1-800-338-8158
E-mail: education@emerson.com
emerson.com/fishervalvetraining
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Personal injury or equipment damage caused by sudden release of pressure or bursting of parts may result if the valve
assembly is installed where service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To
avoid such injury or damage, provide a relief valve for overpressure protection as required by government or accepted
industry codes and good engineering practices.
To Next Page
Loading...
Need help?
General
