User Guide

Rotary Valve Selection Guide
Product Flier
PF51.3:010
October 2010
11
Other Valve Options
V150S VALVE TRIM
W9177/IL
ENVIRO-SEAL Packing System
W7557/IL
Vee-Ball VALVE BALL WITH ATTENUATOR
W7555/IL
Cavitating Liquids and Noisy Gasses . . .
Severe-service attenuator reduces liquid cavitation
and aerodynamic noise.
Materials for Sour Service . . . Materials and
manufacturing procedures are available for
compatibility with NACE MR0103 and MR0175/ISO
15156.
Protection Against Process Fluid Emissions . . .
Optional ENVIRO-SEAL packing systems provide an
improved shaft seal to help prevent the loss of
valuable or hazardous process fluids. These
live-loaded systems provide longer packing life and
reliability.
Alloy Valve Guidelines
 Emerson Process Management expertise has
combined its knowledge of metals and foundry
techniques with valve user experience in creating
high alloy valves that fight corrosion successfully.
 Guidelines have been developed to help the valve
user specify alloy valves correctly. Techniques have
also been implemented that verify a foundry’s ability
to cast alloy valves properly and has established
stringent specifications that guide the foundry in
providing quality results.
 Valve user guidelines include — Avoid the use of
alloy tradenames, Don’t specify wrought for cast,
Forego non-destructive testing
 Steps used to qualify a foundry include —
Weldability tests to gauge the foundry’s ability to
pour alloy materials, Dedicating casting patterns
solely to high-alloy service
 Stringent specifications developed by Emerson
Process Management include — Raw Material
Composition and Quality, Heat Qualification, Visual
Inspection, Weld Repair, Heat Treatment, and
Nondestructive Testing