Center Line® Resilient Seated Butterfly Valves

 

Pressure and Temperature


Center Line Resilient Seated Butterfly Valves
Series 200
Series 225-250

Series 200

Seat Temperature Ratings
Material Temperature Ratings °F
Buna-N +10 to 180
Abrasive Resistant Buna-N +10 to 180
Neoprene +20 to 200
EPDM (2"-16") -30 to 275
EPDM (18" & Above) -30 to 225
EPDM, Food Grade (2"-12") -30 to 225
Viton® +10 to 275
High Temp. Viton® +10 to 400
PTFE over Buna-N
(125 psi, 2" - 12")
+40 to 250


Note:
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 may increase the operating torque beyond the structural limits of the stem and/or the disc to stem configuration.


For High Temperature: When using High Temperature Viton®, the operating pressure of the valve is reduced above 275°F.


Field Replacement: Replacing seats in sizes 14" and above requires factory service.


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Series 225-250

Seat Temperature Ratings
Material Temperature Ratings °F
Buna-N +10 to 180
EPDM (2"-16") -30 to 275
EPDM (18"-24") -30 to 225
Abrasive Resistant Buna-N +10 to 180
Neoprene +20 to 200
Viton® +10 to 275
High Temp. Viton® +10 to 400
PTFE(Series 250 only) +40 to 250


Note:
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 may increase the operating torque beyond the structural limits of the stem and/or the disc to stem configuration.


For High Temperature: When using High Temperature Viton®, the operating pressure of the valve is reduced above 275°F.


Field Replacement: Replacing seats in sizes 14" and above requires factory service.


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