Waukesha Cherry-Burrell Introduction
10/2012 95-03087 Page 9
Operating Parameters
Temperature Range:
The recommended operating temperature is determined by the
material used for the seals.
No special precautions are required for applications within a tem-
perature range of 32°F to 180°F (0°C to 82°C).
For applications above 190°F (88°C), clearances can be affected
by excessive thermal expansion when the valve is installed in
compact fabrications or manifolds. Valve bodies have thicker
cross-sections than tubing, but thermal expansion can affect
clearances in interconnecting piping sections.
If operating below 32°F (0°C):
• Control air must have an appropriately low dew point.
• Valve stems must be protected from icing to ensure long
work
ing life for valve stem seals.
Solenoid valves may not be used in the control module in room
environments below 32°F (0°C) and over 140°F (60°C), as func-
tion cannot be guaranteed.
Seal Compatibility
Table 1: Seal Compatibility for FKM/EPDM Seals
Fluorelastomer
(FKM) Seals
EPDM Seals
Thermal Range
of Application
32°F to 375°F
(0°C to 190°C)
0°F to 275°F
(-18°C to 135°C)
Chemical
Resistance
Silicone oil and grease Silicone oil and grease
Ozone, aging and
weather resistant
Ozone, aging and
weather resistant
Oils and fats Hot water and steam
u
p to 275°F (135°C)
Aliphatic, chlorinated
an
d aromatic
hydrocarbons
Many organic and
inorganic acids
Cleaning agents, soda
a
nd potassium alkalis
Many polar solvents
(a
lcohols, ketones,
esters)
Not compatible
with
Superheated steam Mineral oil products
(oils, greases and
fuels)
Formic and acetic
acids
Contact WCB Application Engineering for other fluid
compatibility.
FKM and EPDM seals comply with FDA regulations.
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