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Service Instructions

137463E Rev. D

August 2015

CBAX30 Spring-Return Series Pneumatic Actuators

Disassembly and Reassembly

Содержание Bettis CBA*30-SR series

Страница 1: ...Service Instructions 137463E Rev D August 2015 CBAX30Spring ReturnSeriesPneumaticActuators Disassembly and Reassembly ...

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Страница 3: ...nstallation 4 1 11 Actuator Start up 5 1 12 Actuator Operation 6 Section 2 Actuator Disassembly 2 1 General Disassembly 7 2 2 Spring Cylinder Disassembly 8 2 3 Housing Disassembly 9 Section 3 Actuator Reassembly 3 1 General Reassembly 10 3 2 Housing Reassembly 10 3 3 Spring Cylinder Reassembly 13 Section 4 Actuator Testing 4 1 Actuator Testing 16 4 2 Return to Service 17 Section 5 Field Conversion...

Страница 4: ...tructions 137463E Rev D II Table of Contents Section 8 Document Revision 22 Appendix A List of Tables 23 Appendix B List of Drawings 24 B 1 Part No VA129743 CBA300 SRX Assembly Drawing 24 B 2 Part No 129745 CBA300 SRX M3HW Assembly Drawing 25 ...

Страница 5: ... actuator series is five years NOTE Storage time is counted as part of the service interval 1 1 3 This procedure is applicable with the understanding that all electrical power and pneumatic pressure has been removed from the actuator 1 1 4 Remove all piping and mounted accessories that will interfere with the module s that are to be worked on 1 1 5 This procedure should only be implemented by a te...

Страница 6: ...on of the use of certain hazardous substances in electrical and electronic equipment RoHS 2 M3 Jackscrew or jackscrew assembly M3HW Jackscrew assembly with handwheel ES Extended Stop s 1 3 General Safety Information 1 3 1 Products supplied by Bettis in its as shipped condition are intrinsically safe if the instructions contained within this Service Instruction are strictly adhered to and executed ...

Страница 7: ...eginning of each service interval using the following recommended lubricants NOTE Lubricants other than those listed in steps 1 6 2 should not be used without prior written approval of Bettis Product Engineering The lubricant item number on some assembly drawings is item 5 while the Bettis service kits lubricant item number is item number 500 1 6 2 All temperature services 50 F to 350 F 45 5 C to ...

Страница 8: ... an atmosphere that is harmful to resilient seals Contact factory for extended storage period 1 10 Actuator Installation 1 10 1 Since there are many valve and actuator combinations it is not practical to include detailed instructions for each type Mountings are designed to be as simple as possible to keep the guess work out of the installation 1 10 2 Actuators that are shipped from the factory wit...

Страница 9: ...ld be cycled with regulated pneumatic pressure This is necessary because the seals have been stationary causing them to take a set Therefore the actuator should be operated through several cycles to exercise the seals so as to achieve a service ready condition 1 11 4 The actuator speed of operation is determined by a number of factors includes 1 Power supply line length 2 Power supply line size 3 ...

Страница 10: ... Controlled Operation Controlled operation is accomplished by pressurizing and or depressurizing the appropriate cylinder inlet s of a double acting Do not exceed pressures indicated on actuator nameplate 1 12 2 Manual Operation All pressure must be vented or equalized on both sides of the pneumatic piston prior to manual operation ...

Страница 11: ...Notate and record any abnormal symptoms such as jerky or erratic operation 2 1 1 Remove all operating pressure from actuator allowing the spring to stroke The spring will rotate the yoke to its fail position NOTE In place of stop screws the actuator may be equipped with one or two ES ES Extended Stops or one M3 M3HW 6 30 located on outboard end of housing 1 10 2 1 2 Record the settings of stop scr...

Страница 12: ...om end cap 4 20 2 2 3 Remove acorn nut 8 20 and gasket seal 5 60 from center bar assembly 8 10 2 2 4 Use a ratchet and socket on the welded nut located on the housing end of center bar assembly 8 10 rotate center bar assembly 8 10 counter clockwise CCW This will cause end cap 4 20 to gradually unscrew from center bar assembly 8 10 2 2 5 Continue to rotate center bar assembly 8 10 counter clockwise...

Страница 13: ... 4 Remove retaining ring 2 90 from torque shaft 1 30 2 3 5 Remove thrust washer 2 80 and thrust bearing 2 70 from torque shaft 1 30 2 3 6 Remove the torque shaft 1 30 by pushing it out one side of housing 1 10 2 3 7 Remove yoke key 1 40 from torque shaft 1 30 2 3 8 Remove yoke 1 20 from housing 1 10 2 3 9 Actuator equipped with a M3 or M3HW mounted in the housing adapter 6 10 complete steps 2 3 9 ...

Страница 14: ...EW PARTS Actuator parts that reflect any of the above listed characteristics may need replacement with new parts 3 1 4 INSTALLATION LUBRICATION INSTRUCTIONS Use the correct lubrication as defined in Section 1 step 1 6 3 1 4 1 Beforeinstallationcoatallmovingpartsandthethrustwasher 8 30 with lubricant 3 1 4 2 Coat all seals with lubricant before installing into seal grooves 3 1 5 Torque shaft upper ...

Страница 15: ...onto groove in M3 jackscrew adapter 6 55 3 2 1 7 Install O ring seal 7 30 onto M3 jackscrew 6 30 NOTE Move the O ring seal 7 30 down the M3 jackscrew until it is next to the M3 jackscrew adapter 3 2 1 8 Install hex nut 6 40 onto M3 jackscrew 6 30 NOTE Rotate the hex nut down the M3 jackscrew until it is next to the M3 jackscrew adapter 3 2 2 Lubricate ES or stop screw 6 30 and install into housing...

Страница 16: ...s CBA Service Kit 3 2 12 Install the new retaining ring 2 90 into the groove located on the upper area of torque shaft 1 30 CAUTION VERIFY RETAINING RING Verify that retaining ring 2 90 is properly seated in the groove of torque shaft 1 30 3 2 13 Rotate the torque shaft 1 30 so that the arms of yoke 1 20 point outward 3 2 14 Coat O ring seal 5 20 with lubricant and install into inner diameter seal...

Страница 17: ...er adapter 4 15 facing away from housing 1 10 3 2 22 2 InstalloneO ringseal 5 15 ontosteppeddiameterofcylinderadapter 4 15 3 3 Spring Cylinder Reassembly NOTE Review Section 3 steps 3 1 1 through 3 1 4 before proceeding with spring cylinder reassembly In section 3 3 where the step indicates to lubricate coat or apply lubricant use lubricant as identified in Section 1 step 1 6 for lubricating the p...

Страница 18: ... removed install stop screw 4 30 or ES 4 30 into end cap 4 20 NOTE Position spring cylinder 4 10 so that spring tag 4 60 will be adjacent to accessory mounting pads located on the actuator housing 3 3 14 Install end cap 4 20 onto center bar assembly 8 10 by rotating the end cap in a clockwise direction 3 3 15 Position the end cap 4 20 so that the breather port is at the bottom and the stop screw E...

Страница 19: ...ecorded in Section 2 step 2 1 2 under General Disassembly Tighten both stop screw hex nuts 4 40 and 6 40 securely while holding ES stop screws or M3 jackscrews in position 3 3 25 M3 hex drive hub or handwheel installation as follows 3 3 25 1 Install caution tag 12 40 onto M3 jackscrew 6 30 3 3 25 2 Install hex drive hub 12 10 or handwheel 12 10 onto M3 jackscrew 6 30 and align the hole of the driv...

Страница 20: ... to seek their service condition 4 1 5 Apply the pressure listed in step 4 1 3 to the housing side of the piston and allow the actuator to stabilize 4 1 6 Apply a leak testing solution to the following areas 4 1 6 1 SpringcylindertohousingjointonCBA730 SRorspringcylindertocylinder adaptertohousingjointsonCBA830 SR CBA930 SR andCBA1030 SR actuators 4 1 6 2 On the out board end of housing 6 10 at th...

Страница 21: ... test could be performed on PED certified actuator by applying pressure to both sides of the piston simultaneously for a period of two 2 minutes If any leakage occurs across a static seal the unit must be disassembled and the cause of leakage determined and corrected WARNING PED PRESSURE TESTING The actuators main pressure bearing parts will be tested in controlled conditions in accordance with th...

Страница 22: ...on 2 5 1 2 Converting to CCW 5 1 2 1 Assemble actuator with spring cylinder assembly on the right side of housing and housing adapter assembly on left side using the orientation below Refer to Section 3 5 1 3 Converting to CW 5 1 3 1 Assemble actuator with cylinder assembly on the left side of housing and housing adapter assembly on right side using the orientation below Refer to Section 3 Figure ...

Страница 23: ...te and reassemble Debris left in the cylinder or housing during maintenance Disassemble cylinder assembly to remove debris Reassemble cylinder assemble as necessary Defective valve Consult the valve manufacturer s documentation Apparent lack of torque Inadequate supply pressure Ensuresupplypressureisabovetheminimum operatingpressureoftheactuatorandthat outputtorqueproducedatsupplypressure exceedsv...

Страница 24: ...uator valve Upon successful completion of the above described Full Stroke Test procedure the Test Coverage can be considered 99 6 2 2 Partial Stroke Test when requested The Partial Stroke Test On line can be performed to improve the PFDAVG value and to satisfy PFDAVG average probability of failure on demand value A typical partial stroke value is 15 of the stroke and the recommended test interval ...

Страница 25: ...rn OFF the power medium and bleed off all pressure first including storage tank if present Next bleed off pilot pressure disconnect pneumatic pressure supply pilot tubing and electrical wiring if equipped Before starting the disassembly a large area should be created around the actuator so to allow any kind of movement Separate the parts composing the actuator according to their nature ex metallic...

Страница 26: ...ion Section 8 Document Revision Table 4 Revision Overview ECN DATE REV BY DATE Released May 2002 A B Cornelius May 2002 19527 Apr 2007 B UPDATED L Ramirez Apr 2007 VAWCO2292 Jan 2012 C UPDATED N Mundy Jan 2012 VAWCO2746 Aug 2015 D UPDATED C Rico Aug 2015 Signatures on file Bettis Houston Texas ...

Страница 27: ...e Instructions 137463E Rev D August 2015 23 Appendix Appendix Appendix A List of Tables Table 1 CBAX30 SR Model Numbers 1 Table 2 Actuator Weight 4 Table 3 Fault Location Table 19 Table 4 Revision Overview 22 ...

Страница 28: ...August 2015 Service Instructions 137463E Rev D 24 Appendix Appendix Appendix B List of Drawings B 1 Part No VA129743 CBA300 SRX Assembly Drawing ...

Страница 29: ...Service Instructions 137463E Rev D August 2015 25 Appendix Appendix B 2 Part No 129745 CBA300 SRX M3HW Assembly Drawing ...

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Страница 31: ...ongmeadow Business Estate East P O Box 6908 Greenstone 1616 Modderfontein Extension 5 South Africa T 27 11 451 3700 EUROPE Holland Fasor 6 Székesfehérvár 8000 Hungary T 36 22 53 09 50 Strada Biffi 165 29017 Fiorenzuola d Arda PC Italy T 39 0523 944 411 www emerson com bettis 2018 Emerson All rights reserved The Emerson logo is a trademark and service mark of Emerson Electric Co BettisTM is a mark ...

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