Fluid Control Systems Selected product range

154Diaphragm Control Valve, forged stainlesssteel body, pneumatically operatedProcess Valves 2731 ForgedComplete Burkert system usingType 2731 with TopControl 8630Type 8630PositionerTopControlcontinuousThe diaphragm control valve Type 2731 consists of apneumatically operated piston actuator, a diaphragmand a valve body from forged stainless steel.The actuator has been designed so that thestroke can be continuously changed. This makes afavourable characteristic possible for the continuouschange of the flow.The Type 2731 can be actuated by the TopControlContinuous Type 8630, SideControl Type 1067 orType 8635 forming a mechanical and functional unitand thus offering a complete control valve system.Using this control valve, continuous regulation tasksfor fluids can be solved.Validation / certificationType 1067PositionerSideControl•Certification of Conformity for Raw MaterialEN-ISO 10204 3.1.B•Attestation of compliance with the orderEN-ISO 10204 2.1•Test report EN-ISO 10204 2.2•3A Certification•Certification of Conformity for Pickling andElectropolishing Processes•Certification of Conformity for the SurfaceQuality DIN4762-DIN4768-ISO/4287/1•Certification of Conformity for the 100% Weldinspection or Endoscopy RCCM RSEM ASME•FDA CFR No. 21 177.2600 Certification•Test Certification and Conformity Certificationfor the Final Assembly of Diaphragm Valves•ISO 9001 Certification• Hermetical separation of fluids from theoperating mechanism by diaphragm• Integrated cascade process controller withPID algorithm• Automatic self-adjustment of basicparameters means autotune for the valveand for PID• Zero dead volumeType 8635Positioner SideControlTechnical dataMaterialsBodyActuatorSealing materialsProcess mediaViscositySurface finish(average surface finish)internal mechanical polishedOn requestinternal electrical polishedinternal mirror finishMedia temperatureEPDMPTFE/EPDM -10 to+130°CAmbient temperatureControl medium(for coupling with a positioner)Pilot pressureThreads for pilot airForged stainless steel 1.4404/316L/BN2Fe