Instruction Manual
D103553X012
Large ET and ED Valves
July 2017
2
Educational Services
For information on available courses for Fisher Large ET/EWT and ED/EWD valves, 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
Description
Fisher NPS 12 through 30 CL150 through CL600 ET/EWT and ED/EWD series control valves are used for either
throttling or on/off control of a wide variety of liquids and gasses.
ET/EWT series valves utilize a hanging cage and a seat ring that is threaded into the cage. These valves have two spring
loaded seal rings, one between the cage and plug and another between the seat ring and valve body, which provide up
to a Class V standard shutoff. They are used for low to medium temperature applications between -46_C (-50_F) and
232_C (450_F). This temperature range can be extended to 316_C (600_F) for nonoxidizing service and to 260_C
(500_F) for oxidizing service by using the High Temperature (HTS1) seal.
The temperature range of the ET/EWT series can be extended to cryogenic temperatures as low as -198_ (-325_F) with
the ET-C and EWT-C specialized versions of these valves. The specialized valves feature unique trim, seals, and a longer
extension bonnet to tolerate the extreme cold.
ED/EWD series valves utilize a hanging cage and a seat ring that is bolted into the body. These valves have two graphite
piston rings between the cage and plug, which provide up to a Class IV standard shutoff. They are used for high
temperature applications between 316_C (600_F) and 593_C (1100_F). Shutoff can be improved to Class V by using
the Bore seal.
A range of severe service trims are available for noise abatement or cavitation control. Noise abatement trims help
with aerodynamic noise attenuation in gas services and feature a Whisper Trim III or WhisperFlo cage. Cavitation
control trims help prevent the damaging effects of liquid cavitation and include either a Cavitrol III cage (for services
without entrained particulate) or Dirty Service Trim (DST) set (for services with entrained particulate).
Specifications
Typical specifications for these valves are shown in table 1.
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