14 EB 8091-1 ENDesign and principle of operation3.2 VersionsThe modular design allows an insulating sec-tion or metal bellows to be fitted to the stan-dard valve version.If valve accessories (e.g. positioner, limitswitch etc.) are to be mounted to the valveversion with flanges, we recommend mount-ing an insulating section or bellows seal. Thisprovides more space to mount valve accesso-ries.ActuatorsIn these instructions, the preferable combina-tion with a Type 3271 or Type 3277 Pneu-matic Actuator is described. The pneumaticactuator (with or without handwheel) can bereplaced by another pneumatic actuator in adifferent size, but with the same travel.Î Observe the maximum permissible actu-ator force.If the travel range of the actuator is largerthan the travel range of the valve, the springassembly in the actuator must be preloadedso that the travel ranges match. See associ-ated actuator documentation.The basic pneumatic actuator can be re-placed by a pneumatic actuator with addi-tional handwheel or by an electric actuator.3.3 Technical dataThe nameplates on the valve and actuatorprovide information on the control valve ver-sion. See section 2.1 and the actuator docu-mentation.More information is available in Data Sheetu T 8091-1.ComplianceThe Type 3510 Valve bears the EAC mark ofconformity:Temperature rangeDepending on the version, the control valveis designed for a temperature range from 14to 428 °F (–10 to +220 °C). The use of aninsulating section or bellows seal extends thetemperature range from –325 to +842 °F(–196 to +450 °C). Special materials areavailable for temperatures up to 1200 °F(650 °C).Leakage classDepending on the version, the followingleakage class according to ANSI/FCI 70-2or IEC 60534-4 applies:− Leakage class IV with metal seal− Leakage class V for high-performancemetal sealTipNoteNote