Buying Guide

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Revision 3/31/2016
Ball Valve Seat Materials
25% Reinforced PTFE
NIBCO uses short strand fiberglass as a reinforcement for our higher pressure carbon steel and alloy ball valve products.
Adding reinforcement increases the pressure containing capabilities of PTFE by reducing its tendency to cold-flow.
Carbon-Filled PTFE
Carbon-filled PTFE is an excellent seat material for steam applications as well as high efficiency oil-based thermal fluids. Other
fillers, including graphite, enable this seat material to have better cycle life than other filled or reinforced PTFE seats. Chemical
resistance equal to other PTFE and filled PTFE products.
Color Code
25% reinforced PTFE resin has a color code of RED. This
pigment is permanently molded into the PTFE resin matrix.
Temperature Range
-20° to +400° F temperature range in ball valve applications.
Pressure Range
27" vacuum to 2,000 PSI non-shock water, oil or gas.
Unique Features
Improved dimensional stability. Good wear properties.
Typical Applications
Steam service, natural and bottled gas distribution.
NIBCO Figure Number Designation “R”
Product Availability
T-560-CS-R/S6-R
Color Code
Carbon filled PTFE has a natural pigment of BLACK.
Temperature Range
-20° to +500° F temperature range in ball valve applications.
Pressure Range
27" vacuum to 2,000 PSI non-shock water, oil or gas.
Unique Features
Higher cycle life than other PTFE resins.
Typical Applications
High pressure steam and thermal fluids.
NIBCO Figure Number Designation
“F” (in flanged) and “C” (in threaded).
Product Availability
F-510/530-CS-F/S6-F-66
F-515/535-CS-F/S6-F-66
AT-585-70-66
TM-585-70-66
Chemical Compatibility
Please consult the most current edition of the NIBCO Chem-Guide for recommendations regarding chemical compatibility of material exposure to specific media and media-treatment additives. The
NIBCO Chem-Guide is a general guide on the topic of chemical compatibility and is by no means an exhaustive resource on the subject. Ultimately, proper material selection is the responsibility of the
installer and/or end-user, taking into account all aspects of a system’s design and intended use.
Galvanic Potential in Piping Systems
Galvanic corrosion or dissimilar metal corrosion is an electrochemical process that is created through the electrical interaction of two different metals under the influence of a conductive media (i.e.
an electrolyte). An electrolytic cell, much like a battery, is generated by these dissimilar metals using water as the electrolyte. The electrical charge, developed within the electrolytic cell, drives a
preferential attack on the more electrically active metal with the water acting as the recipient of the discarded metal ions. Such galvanic attack is often encountered in service where iron or steel
components are installed, and later corrode, in a largely copper piping system. Please consult NIBCO Technical Bulletin NTB-0714-01 Dielectric Products Relative to Electrolysis and Galvanic Corrosion.