Data Sheet

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Fisherr ET, EAT, and ETR
Sliding-Stem Control Valves
Fisher ET, EAT, and ETR general-purpose control valves
(figures 1, 2, and 3) are used for throttling or on-off
controlofawidevarietyofliquidsandgases.Allthree
valve designs have single ports, balanced valve plugs,
and cage guiding. Metal-to-PTFE seating for stringent
shutoff requirements is standard in all valves except
those with Cavitrolt III cages. Metal-to-metal seating
forhighertemperaturesisstandardforvalveswith
Cavitrol III cages and optional for all other valves.
The temperature limits of ET valves can be extended
above 232_C(450_F) by using PEEK
(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.
The ET product line is available for a wide range of
applications, including sulfide and chloride
stress-cracking environments common to the oil and
gas production industries. To discuss available
constructions, contact your Emerson Process
Management sales o ffice and include the applicable
codes and standards required for these environments.
The easy-et Valve Family
ET, EAT, and ETR control valves are part of the versatile
easy-e family of Fisher industrial control valves. easy-e
valves share the following characteristics:
Multiple trim material choices
Interchangeable, restricted-capacity trims and
full-sized trims to match variable process flow
demands
FISHER ET CONTROL VALVE
WITH 667 ACTUATOR
W1916-3
Different cage/plug styles that provide particular
flow characteristics for highly-specialized
applications. The standard cage comes in three
different flow characteristics:
J quick-opening,
J linear, or J equal percentage.
Whisper Trimt I, Whisper Trim III (figure 6), and
WhisperFlot cages (figures 4 and 5) attenuate
aerodynamic noise in gaseous service.
To help eliminate cavitation damage in a
properly-sized valve, a standard-travel, Cavitrol III,
one-stage cage (figure 8) and a long-travel, Cavitrol
III, two-stage cage are available in the NPS 1
throughNPS8ETcontrolvalve.
ET Valve
D100022X012
Product Bulletin
51.1:ET
December 2012

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