Fisher EWS Series Instruction Manual page 2

EW Valve
End Connection Styles
Flanged Ends: CL300, CL600, or CL900
Raised-face or ring-type joint flanges per ASME
B16.5
Buttwelding Ends: Styles per ASME B16.25
schedules consistent with ASME B16.34 are:
J J
Schedules 40 or
J
valves, Schedule 80 or
CL900 valves, or Schedule
J
120 for NPS 12x8 CL900 valves.
Maximum Inlet Pressures, Temperatures, and
(1)
Pressure Drops
Consistent with applicable
J (3)
or CL900 pressure/temperature ratings per
ASME B16.34, but do not exceed the pressure,
temperature, and pressure drop conditions
specified when the valve was ordered. Also see
the Installation section.
Also see Bulletin 80.3:010 WhisperFlor
Aerodynamic Attenuation Trims
Shutoff Classifications
See table 2
C-seal trim: High-temperature, Class V per
ANSI/FCI 70-2 and IEC 60534-4
See table 3
WhisperFlo Trim:
J Class IV per ANSI/FCI 70-2 and IEC 60534-4
J Others per application
Flow Characteristics
J
Standard Cages:
J
equal percentage
Whisper Trimr and Cavitrolr Cages: Linear
WhisperFlo Trim: Linear (restricted linear cages
and special, characterized cages are
available—consult your Emerson Process
Management sales office)
Flow Directions
Design EWS and Standard Cage: Normally up
Design EWD or EWT with Standard Cage:
1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.
2. Certain bonnet bolting material selections may require a CL600 easy-e valve assembly to be derated. Contact your Emerson Process Management sales office.
3. There are two different CL900 NPS 8x6 valve bodies, one for use only with Cavitrol III cages and the other for use with all other constructions. A CL900 valve with Cavitrol III cage can
take full CL900 pressure drops. For information on other NPS 8x6 constructions that can take full CL900 pressure drops, contact your Emerson Process Management sales office. All other
trim constructions are limited to CL600 pressure/temperature limits even though installed in a CL900 valve.
2
Table 1. Specifications
80 for all CL300 and CL600
J
XXS for NPS 8x6
J J
80, 100, or
J J
CL300, CL600
J
Linear, quick opening, or
Normally down
Whisper Trim Cages: Always up
Cavitrol Cages: Always down
WhisperFlo Trim: Flow up (standard)—through
the seat ring and out through the cage orifices
Approximate Weights
See table 4
WhisperFlo Trim Material and Selection
J 410 Stainless Steel
J Others per application
See appropriate valve body bulletin
(2)
,
WhisperFlo Pressure/Temperature Capability
J –29 to 427_C (–20 to 800_F)
J Others per application
See appropriate valve body bulletin for
complementary information
WhisperFlo Aerodynamic Trim Pressure
(1,2)
Ratings
Up to 1500 psi drop
WhisperFlo Velocity Limits
WhisperFlo trim is designed for 0.3 MACH as an
inherent outlet velocity limit. Variations higher and
lower may be applied per special applications
WhisperFlo Rangeability
100:1
WhisperFlo Noise Attenuation
Approximately –40 dBA maximum depending on
the nP/P
procedure
See Fisherr Specification Manager
Additional Specifications
For specifications such as materials, port
diameters, valve plug travels, yoke boss
diameters, and stem diameters, refer to the Parts
List
Instruction Manual
ratio per IEC 534-8-3 calculation
1
Form 2376
March 2007