Samson 3271 Original Instructions Manual

Also see for 3271: Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions

Contents

6-2 EB 8310-6 ENStart-uplonger be correct. This may apply, for exam-ple, to the configuration ID or the symbol af-ter reversal of the direction of action.Î Immediately renew any nameplates orlabels with incorrect or outdated infor-mation.Î Add any new values to the nameplate. Ifnecessary, contact SAMSON to obtain anew nameplate.Risk of actuator damage due to excessivelyhigh or low tightening torques.Observe the specified torques on tighteningactuator components. Excessively tightenedtorques lead to parts wearing out quicker.Parts that are not tightened far enough mayloosen.Î Observe the specified tightening torques(u AB 0100).Risk of actuator damage due to the use ofunsuitable tools.Î Only use tools approved by SAMSON(u AB 0100).6.1 Preloading the springsRefer to Fig. 6-1By preloading the springs in the actuator, thefollowing can be achieved:− The thrust is increased (only actuatorswith "stem extends")− In combination with a SAMSON valve:the actuator travel range can be adaptedto a smaller valve travel range6.1.1 Tensioning the springsRisk of actuator damage due to the springsbeing tensioned unevenly.Î Distribute clamping bolts and nuts evenlyaround the circumference.Î Tighten the nuts gradually in a crisscrosspattern.1. Distribute the long bolts (A22) evenlyaround the circumference.2. Screw the long nuts (A23) together withshims (A25) onto the clamping bolts(A22) until they rest on the bottom dia-phragm case (A2).3. To tension the springs evenly, tighten thenuts (A23) gradually in a crisscross pat-tern until both diaphragm cases (A1, A2)rest on the diaphragm (A4). Hold thebolt head stationary with a suitable tooland apply the tightening torque to thenuts. Observe tightening torques.4. Insert the short bolts (A20) through theintended holes in the diaphragm cases(A1, A2).NOTICE!NOTICE!NOTICE!