Description - Emerson Fisher EU Instruction Manual

Instruction Manual

D102010X012

Table 2. WhisperFlo Trim Specifications

Trim Material and Selection

J 316 Stainless Steel w/ hardfacing

J 410 Stainless Steel, hardened

J Others per application

Temperature Capability

J EUT and EWT: -73 to 316_C (-100 to 600_F)

J EUT‐2 and EWT‐2: -73 to 232_C (-100 to 450_F)

J EUD and EWD: -29 to 538_C (-20 to 1000_F)

J Others per application

Maximum Pressure Drops

As shown in this bulletin. Also see Bulletin 80.3:010

WhisperFlo Aerodynamic Attenuation Trims

WhisperFlo Aerodynamic Trim Pressure Ratings

Up to 1500 psi drop

Velocity Limits

WhisperFlo trim is designed for 0.3 MACH as an

inherent outlet velocity limit. This velocity limit of 0.3

MACH may be exceeded for demanding applications

1. Other pressures on application.

2. The pressure/temperature limits in this instruction manual and in any applicable standard limitations should not be exceeded.

All valve types covered in this manual (EUD, EUT, EUT‐2, EWD, EWT, and EWT‐2 valves) can be used for either

throttling or on‐off control of a wide variety of liquids and gasses. They are single‐port, globe‐style valves with cage

guiding, balanced valve plugs, and a push‐down‐to‐close action. EUT, EWT, and EWT‐2 valves have a spring‐loaded

PTFE seal between the plug and cage; the EUD and EWD valves have two graphite piston rings between the plug and

cage. See figure 5, 6, or 7 for seal details.

EUT‐2 and EWT‐2 valves have a seat ring threaded into the cage. A spring‐loaded PTFE seal is used to seal between the

seat ring and the valve body. Standard seating is metal‐to‐metal, but optional soft metal seats are also available. A

typical EUT‐2 or EWT‐2 valve is shown in figure 5.

EUD and EWD valves have a seat ring bolted into the valve body with cap screws. Seating is metal‐to‐metal. A typical

EUD or EWD valve is shown in figure 6.

EUT and EWT valves have a seat ring bolted into the valve body with cap screws. These valves have metal‐to‐metal

seating and use PEEK anti‐extrusion rings in the plug seal arrangement to increase the upper temperature limit of the

seal to 316_C (600_F). A typical EUT valve is shown in figure 7.

Cavitrol III, Whisper Trim III, and WhisperFlo trim cages are available in these valves. Cavitrol trim helps eliminate

cavitation damage in liquid service in a properly sized valve and Whisper Trim III and WhisperFlo trim cages help

attenuate aerodynamic noise in gas service.

Fisher WhisperFlo trim represents state of the art solutions for applications that demand ultimate aerodynamic noise

attenuation.

with adequate care and corrections in aerodynamic

noise prediction - consult your Emerson Automation

Solutions sales office

Flow Characteristic

Linear (restricted linear cages and special,

characterized cages are available‐‐consult your

Emerson Automation Solutions sales office)

Rangeability

65:1

High rangeability in excess of 250:1 is available in

some constructions. Contact your

office

or Local Business Partner for details

Flow Direction

(1,2)

Standard: Flow up‐‐through the seat ring and out

through the cage orifices

Noise Attenuation

Approximately -40 dBA maximum depending on the

nP/P

ratio per IEC 60534‐8‐3 calculation procedure

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EU and EW Series Valves

July 2017

Emerson sales

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