Series
300 - Seat Temperature Ratings
|
Material
|
Temperature
Ratings °F
|
|
Buna-N
|
+10
to 180
|
|
Abrasive
Resistant Buna-N
|
+10
to 180
|
|
Neoprene
|
+20
to 200
|
|
EPDM
|
-30
to 275
|
|
EPDM
(18" and above)
|
-30
to 225
|
|
EPDM,
Food Grade
|
-30
to 225
|
|
Hypalon
|
0
to 275
|
|
Viton®
|
+10
to 275
|
|
High
Temperature Viton®
|
+10
to 400
|
|
PTFE
over Buna-N
|
+40
to 275
|
Although elastomers have an effective operating temperature range, when
used in valves these ranges may have to be modified. The temperature
ranges shown in the table have been adjusted accordingly.
For
Low Temperature: while the seat materials selected for use in Center
Line butterfly valves are capable of withstanding lower temperatures
without damage, the durometer of the elastomer is changed. This "hardening"
of the seat can increase the operation torque beyond the structural
limits of the stem and/or the disc to stem connection.
For
High Temperature: When using High Temperature Viton, the operating
pressure of the valve is reduced above 275°F.
Toll
Free: 1-800-447-4230
Fax: 713-462-4187
Local: (713) 462-4181
24 Hr. Pager (713) 764-2285
E-mail: valves@aivinc.com
Copyright© AIV, Inc. 2001
