Instruction Manual
D103553X012
Large ET and ED Valves
July 2014
4
Control valves with WhisperFlo cages provide additional aerodynamic noise attenuation in very demanding vapor or
gas applications with high-pressure drops. A WhisperFlo cage with an appropriately sized valve body is designed to
reduce the noise level up to -40 dBA. For special applications, -50 dBA attenuation can be achieved.
Specifications
Typical specifications for these valves are shown in tables 1 and 2. Some of the specifications for a given valve
assembly as it comes from the factory appear on the actuator nameplate if the valve is part of a complete control valve
assembly.
Installation
WARNING
To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve
assembly where service conditions could exceed the limits given in this manual or on the appropriate nameplates. Use
pressure-relieving devices as required by government or accepted industry codes and good engineering practices.
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
The valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions. Because some valve body/trim material combinations are limited in their pressure drop and
temperature range capabilities, do not apply any other conditions to the valve without first contacting your Emerson
Process Management sales office.
WARNING
If you are hoisting the valve, use nylon slings to protect the surfaces.
Carefully position the slings to prevent damage to the actuator tubing and any accessories. Also, take care to prevent
people from being injured in case the hoist or rigging slips unexpectedly. Refer to table 6 for valve assembly weights. It is
important to use adequately sized hoists and chains or slings to handle the valve.
1. Before installing the valve, inspect the valve and associated equipment for any damage and any foreign material.
2. Make certain that the valve body interior is clean, that pipelines are free of foreign material, and the valve is
oriented so that pipeline flow is in the same direction as the arrow on the side of the valve.
CAUTION
For long service life and more effective operation, the process liquid must be clean. If the valve being installed has a
Whisper Trim, WhisperFlo, or Cavitrol Trim cage with small internal flow passages, impurities or entrained solids in the
