Emerson Bettis RGS F Series, Installation, Operation And Maintenance Manual

Page 1: ...Installation Operation and Maintenance Manual RGS011110 2 Rev 0 April 2016 Bettis RGS F Series Double Acting Actuators ...

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Page 3: ... Attachment 3 2 2 Accessory Mounting 4 2 3 Piping and Operation 4 2 4 Travel Adjustment 7 Section 3 Troubleshooting 9 Section 4 Maintenance 10 4 1 Periodic Maintenance Schedule 10 4 2 Lubrication 10 4 3 Piston Seal Replacement 10 4 4 Rod Seal Replacement 13 4 5 Yoke Seal and Bushing Replacement 15 4 6 Pins and Rollers Replacement 19 Appendix A 21 A 1 Force Module 21 A 2 Torque Module 23 ...

Page 4: ...nning maintenance Bettis RGS F Series actuators are composed of three basic sub assemblies two force modules and a torque module The force modules contain the pistons which provide linear motion The torque module contains the yoke which converts the force modules linear motion into torque and operates the valve Every actuator assembled by Bettis is tested prior to shipment to our customers Order s...

Page 5: ...Section 2 Installation Bettis actuators may be mounted in any position orientation If necessary lift the actuator with straps placed inside the framework of the body Never lift the actuator by the cylinders tie rods or travel stops Lifting the actuator with the valve attached is not generally recommended Figure 1 ...

Page 6: ...the actuator is in the same position as the valve It may be necessary to stroke the actuator to determine the correct mounting orientation Attach the actuator to the valve using the proper bracket and coupler or with a Bettis Universal Mounting Plate UMP if provided Using all mounting holes indicated on Bettis dimensional drawings tighten all fasteners hand tight then torque the fasteners to the c...

Page 7: ...m allowable pressure is not exceeded Air driven stainless steel actuators with stainless steel or composite cylinders are not harmed by wet air so long as freezing does not occur Aluminum and chrome plated steel cylinders may be harmed over time by the presence of water WARNING DO NOT EXCEED PRESSURE RATING Exceeding the stated maximum pressure may result in damage to equipment and danger to perso...

Page 8: ...the shaft and turning the actuator top side down Double Acting Left Hand pressure on the end cap ports pushes the pistons inward and causes counterclockwise rotation Pressure to the base plate ports pushes the pistons outward resulting in a clockwise rotation Double Acting Right Hand pressure on the end cap ports pushes the pistons inward and causes clockwise rotation Pressure to the base plate po...

Page 9: ...sure ports P3 and P4 must be utilized for proper operation P1 and P2 are typically connected and powered by a single air pathway P3 and P4 are typically connected and powered by a single air pathway P5 is a breather port that should be fitted with a filter or strainer On double acting models P5 may also be plugged without affecting actuator operation Figure 4 P1 P3 P4 P2 P1 P3 P4 P2 P5 2 P5 2 ...

Page 10: ...ul not to misplace the travel stop O rings 3 Ensure actuator lockout if provided is disengaged 4 Apply pressure to P3 and P4 to force the pistons fully outward then relieve all pressure 5 Unthread Travel Stop A 2 four to five full turns 6 Adjust Travel Stop A 1 until travel is set to the desired position It may be necessary to apply pressure to P3 and P4 between adjustments to determine final posi...

Page 11: ...they contact the clevis simultaneously It will be necessary to apply pressure to P1 and P2 between adjustments to determine the final position of travel 6 With pressure to P1 and P2 thread in Travel Stops B 2 until they are in firm contact with the clevis Figure 6 7 With pressure still to P1 and P2 ensure that all Travel Stops B are in firm contact with the clevis and tighten all travel stop nuts ...

Page 12: ...on 4 3 Improper Travel Travelstopsarenotcorrectlyset See Section 2 4 Internal cylinder contaminants preventing normal stroke See Section 4 3 Damaged valve Consult valve manufacturer Operating Strokingtooslowly Supply pressure too low Verifyoperatingpressurewillsupply torque needed to operate valve correctly Internal cylinder contaminants preventing normal stroke See Section 4 3 Damaged valve Consu...

Page 13: ... substances in electrical and electronic equipment RoHS 2 4 2 Lubrication Bettis actuators are lubricated for life For special applications grease fittings may be provided Use the grease fittings if applicable incorporated into the torque module of your actuator to apply additional lubricant The frequency of this lubrication will depend on the application of the actuator For any questions regardin...

Page 14: ...pproved lubricant if they are replaced 7 Inspect the piston bolt for any corrosion or wear pitting cracking If excessive corrosion or wear is apparent a new actuator or actuator components may be necessary Figure 8 Piston O ring Wiper Ring Piston Bolt 8 Lubricate the internal surface of the cylinder with a light coat of the correct Bettis approved lubricant and slide the cylinder back over the pis...

Page 15: ...tighten and then torque the hex nuts to half and then full values according to the table below using the pattern designated Table 3 Cylinder Size In Ft Lbs Nm 6 15 20 8 35 48 10 35 48 12 35 48 16 56 76 20 58 79 24 87 118 Figure 9 4 Bolt Pattern 1 4 2 3 1 3 5 2 4 6 6 Bolt Pattern 12 Bolt Pattern 1 11 3 7 9 5 2 12 4 8 10 6 10 Bolt Pattern 1 8 10 5 3 7 2 9 6 4 8 Bolt Pattern 1 2 3 4 5 6 7 8 ...

Page 16: ...actuator to service 4 4 Rod Seal Replacement 1 Follow steps 1 to 4 of Section 4 3 2 Apply heat to piston hub and set screw to break thread locker and remove set screw Figure 10 3 Unthread the piston from the piston bolt Figure 11 4 Use heat to break thread locker Remove all socket head cap screws SHCS se curing the seal retainer to the base plate and slide the seal retainer off the open end of the...

Page 17: ... the internal seal carrier O ring on the threads of the piston bolt 9 Secure the seal carrier with the seal retainer and the socket head cap screws removed in step four Apply medium strength thread locker and torque to 44 in lb 5 Nm 10 Apply medium strength thread locker to the internal threads of the piston and thread the piston back onto the piston bolt to the point of refusal 11 Apply medium st...

Page 18: ...The following steps can be followed to replace the yoke seal and or bushings 1 Depressurize the actuator and remove all supply lines 2 Remove the actuator from the valve 3 Ensure lockout if provided is disengaged 4 Remove the hex nuts which secure the force modules to the torque module of the actuator Do this for both force modules Figure 13 5 Separate the force modules from the torque module This...

Page 19: ... and bolts securing the two halves of the body together Figure 15 7 Separate the two halves of the body This may require the use of a pry bar as the joint between the body halves is filled with sealant during assembly 8 Remove the yoke from the bottom half of the torque module Figure 16 Top Body Plate Yoke Assembly Bottom Body Plate ...

Page 20: ...and larger the O ring is in a groove in the body 10 Visually inspect the body slots as well as the pins and rollers on the clevises for wear If excessive wear is present new slide inserts if applicable pins rollers or a new actuator may be necessary for further safe reliable operation 11 Remove the original sealant from the joining edges of the two separate halves of the body 12 Position the yoke ...

Page 21: ...rt both force modules into the torque module simultaneously to ensure that both are joined correctly with the torque module 16 Coat the threads of the hex nuts removed in step four with medium strength thread locker and secure the force modules to the torque module with the hex nuts Torque the nuts to the corresponding value in the table below Table 5 Model Ft Lbs Nm 2200 2250 2300 120 163 2375 24...

Page 22: ...e mod ule This will cause the piston bolt to protrude from the force module and allow the user to inspect it 3 Inspect the piston bolt clevis pin and rollers for wear This includes any pitting or cracking Replace the necessary components Spare parts may be obtained through your Bettis distributor 4 Apply heat to break the thread locker on the set screw 5 To replace pins or rollers remove the set s...

Page 23: ...ricant and reassemble them Apply high strength thread locker Align pin slot with hole in the clevis and install set screw torque the pin set screw to the corre sponding value in the table below Table 6 Model Ft Lbs Nm 2200 35 4 2250 44 5 2300 2375 106 12 2488 2575 212 24 Figure 22 7 Repeat steps 2 to 6 of this Section on the second force module 8 Repeat steps 16 to 18 of Section 4 5 ...

Page 24: ...April 2016 Installation Operation and Maintenance Manual RGS011110 2 Rev 0 21 Appendix Appendix Appendix A A 1 Force Module 1 3 2 4 5 7 11 12 15 13 14 17 16 20 19 21 22 24 25 18 23 26 27 28 10 8 9 6 ...

Page 25: ...ut FM Mount 8 Stud 9 Hex Nut Tie Rod Backup 10 Base Plate 11 External Seal Carrier O ring 12 Seal Carrier 13 Internal Seal Carrier O ring 14 Seal Retainer 15 Piston Set Screw 16 Seal Retainer Bolt 17 Piston Bolt 18 Piston 19 Wiper Ring 20 Piston O ring 21 Tie Rod 22 Cylinder 23 Cylinder Seal 24 End Cap 25 Tie Rod Nut 26 Travel Stop A 27 Travel Stop O ring 28 Travel Stop Nut A Not present on cylind...

Page 26: ...April 2016 Installation Operation and Maintenance Manual RGS011110 2 Rev 0 23 Appendix Appendix A 2 Torque Module 3 4 5 6 7 15 12 8 14 13 1 9 11 2 10 ...

Page 27: ...dix 4 6 2 Torque Module Part Number Number Part 1 Travel Stop B 2 Travel Stops Nut B 3 Top Hat Mounting Bolt 4 Top Hat Bolt 5 Top Hat 6 Top Hat Indicator 7 Top Hat Base 8 Body Assembly 9 Yoke Bushing 10 Body Assembly Nuts 11 Yoke O ring 12 Yoke Thrust Washer 13 Body Bottom 14 Yoke 15 Body Top ...

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