Data Sheet

EW Valve
D100023X012
Product Bulletin
51.1:EW
August 2012
2
(PolyEtherEtherKetone) anti-extrusion rings in
combination with a spring-loaded PTFE seal. The PEEK
anti-extrusion rings expand to close off the clearance
gapbetweentheplugandthecagewherethePTFE
seal may extrude at high temperatures and pressures.
The temperature limits are extended to 316_C (600_F)
for non-oxidizing service and to 260_C(500_F) for
oxidizing service.
Note
Refer to Fisher bulletin 51.1:EWN (D100024X012) for
information on EWN Series valves with Whisper Trim III
cages.
Note
Refer to Fisher bulletin 80.3:010 (D102362X012) for
information on WhisperFlot Aerodynamic Noise
Attenuation Trim.
Features
 Compliance with the Clean Air Act– ENVIRO-SEAL™
packing systems provide an improved stem seal to
help prevent the loss of valuable or hazardous
process fluid. The ENVIRO-SEAL packing systems
featurePTFEorGraphiteULFpackingwith
live-loading for reduced packing maintenance.
 Noise Attenuation–In an EW Series valve, noise
produced by high flow rates and large pressure
drops can be reduced by up to 18 dbA with a
Whisper Trim I cage, by up to 30 dbA with a Whisper
Trim III cage, and by up to 40 dbA with a WhisperFlo
cage.
 Piping Economy–Expanded end connections of EW
Series valve bodies may reduce the need for line
swages while accommodating oversized piping
arrangements used to limit fluid flow velocities.
 Temperature Compensation–On designs with the
seat ring threaded into the valve body (figure 4), the
hung cage feature helps reduce gasketing problems
caused by thermal expansion and contraction of
long parts, such as the cage assembly.
 Standard Trim Parts across the easy-e product
line–Included are FGM gaskets, packing flange,
studs, and nuts.
 High-Temperature, Class IV or Class V
Shutoff–Optional multiple piston rings (figure 14)
for EWD and EWD-1 valve bodies permit Class IV
shutoff up to 593_C (1100_F).
Use of C-seal trim for EWD (see figure 5) permits
Class V shutoff up to 593_C (1100_F).
 Increased Pressure/Temperature Ratings–NPS 12x8
CL900 EW Series valve bodies with buttwelding end
connections are capable of i ncreased ASME ratings
called Intermediate Standard Ratings. The extra
strength of the valve body allows these valves to be
used where pressures and temperatures exceed
Standard Class ratings in ASME B16.34.
See Bulletin 59.1:027, Increased Pressure/
Temperature Ratings for EH and EW Series Steel
Valves (D100076X012), for further information.
 Sour Service Capability– Unless otherwise noted,
references are to NACE MR0175-2002. Optional
materials are available to meet NACE MR0103 and
NACE MR0175 / ISO 15156. Material requirements
under these standards vary by edition and year of
issue; the specific standard must be specified.
Table of Contents
Features 2.....................................
Specifications 3................................
C-seal Trim Description 6........................
ENVIRO-SEAL and HIGH-SEAL Packing Systems 6.....
Available Configurations 10......................
Material Selection Guidelines 10..................
ANSI/FCI Class VI Shutoff Capabilities 12............
Fisher TSO (Tight Shutoff) Trim Capabilities 13......
Installation 13.................................
Dimensions 29.................................