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Emerson Bettis CBA 30 Series, Разборка и сборка

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Service Instructions

137462E Rev. D

 

August 2015

25

Section 6: Troubleshooting

Troubleshooting

Section 6: Troubleshooting

6�1 

Fault Insertion

In the unlikely event of a fault developing, the following Fault Location Table is provided to 
assist the service engineer to perform troubleshooting. This table is designed to cover as wide 
a range of Emerson Bettis actuators as possible. Reference to equipment not supplied should 
be ignored.

Table 3� 

Fault Location Table 

 

SYMPTOM

POTENTIAL CAUSES

REMEDY

Erratic movement

Irregular supply of operating
medium

Check operating medium for consistent supply 
pressure and correct as necessary

Inadequate lubrication

Dismantle, relubricate and reassemble

Worn parts

Dismantle. Visually inspect for significant 
wear. Actuator replacement may be required

Defective valve

Consult the valve OEM's documentation

Short stroke

Incorrectly set stops
(valve and /or actuator)

Check the position of the travel stops and 
readjust as necessary

Hardened grease

Dismantle, remove any hard grease,
relubricate 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

Ensure supply pressure is above the minimum  
operating pressure of the actuator and that  
output torque produced at supply pressure 
exceeds valve torque demand

Incorrect speed control settings Adjust speed controls to increase flow

Exhaust port blocked

Remove and clean the exhaust port silencers 
and replace

Pipe work blocked, crushed
or leaking

Examine the pipe work for blockages, 
crushed pipe or leakage. Clear or replace  
as necessary

Defective controls

Examine the controls, refurbish or renew as 
necessary. Refer to component  
manufacturer's documentation

Defective piston seal

Dismantle the cylinder assembly, remove the 
defective piston seal. Fit new seal  
and reassemble

Defective rod seal

Dismantle the cylinder assembly, remove the 
defective rod seal. Fit new seal  
and reassemble

Defective housing seal

Dismantle the housing assembly, remove the 
defective seal. Fit new seal and reassemble

High valve torque or valve seized Consult the valve OEM documentation

Содержание Bettis CBA 30 Series

Страница 1: ...Service Instructions 137462E Rev D August 2015 CBAX30Double ActingSeriesPneumaticActuators Disassembly and Reassembly ...

Страница 2: ......

Страница 3: ...tion 2 Actuator Disassembly 2 1 General Disassembly 7 2 2 Pneumatic Cylinder Disassembly 8 2 3 Housing Disassembly 9 Section 3 Actuator Reassembly 3 1 General Reassembly 11 3 2 Housing Reassembly 12 3 3 Pneumatic Cylinder Reassembly 15 Section 4 Actuator Testing 4 1 Actuator Testing 19 Section 5 Field Conversions 5 1 High Temperature Service 10 TRIM 21 5 2 Low Temperature Service 11 TRIM 21 5 3 Ad...

Страница 4: ...f Contents Section 6 Troubleshooting 6 1 Fault Insertion 25 6 2 Operational Test 26 Section 7 Removal and Decommissioning 7 1 Removal and Decommissioning 27 Section 8 Document Revision 28 Appendix A List of Tables 29 Appendix B List of Figures 30 Appendix C List of Drawings 31 ...

Страница 5: ...age 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 technically competent technician who shoul...

Страница 6: ...product is only intended for use in large scale fixed installations excluded from the scope of Directive 2011 65 EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment RoHS 2 M3 Jackscrew or jackscrew assembly 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...

Страница 7: ...t 1 6 Lubrication Requirements 1 6 1 The actuator should be relubricated at the beginning 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 1 6 2 All temperature services 50 F to 350 F 45 5 C to 176 6 C use Bettis ESL 5 lubricant ESL 5 lubricant i...

Страница 8: ...gn particles and moisture Actuators should not be stored in 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 installa...

Страница 9: ...n normal operating position as per SCHEMATIC INSTRUCTIONS 1 11 2 Check connections 1 Pneumatic hydraulic components connected as per schematic enclosed or in service manual supplied 2 Pneumatic supply connected to the identified ports 3 Electrical connection terminals are secured 4 Wiring as per enclosed diagram or service manual supplied 1 11 3 When actuator is first placed into service it should...

Страница 10: ...um operating pressure of actuator or control components 1 11 6 Slower operating time may be obtained by using flow control valves to meter the exhaust Excessive exhaust flow metering may cause erratic operation 1 12 Actuator Operation 1 12 1 Controlled Operation Controlled operation is accomplished by pressurizing and or depressurizing the appropriate cylinder inlet s of a double acting Do not exc...

Страница 11: ...re starting the general disassembly of the actuator it is a good practice to operate actuator with the pressure used by the customer during normal operation Notate and record any abnormal symptoms such as jerky or erratic operation 2 1 1 Remove all operating pressure from actuator NOTE In place of stop screws the actuator may be equipped with one or two ES ES Extended Stops or M3 M3HW located on o...

Страница 12: ... wheel 12 10 2 2 1 2 2 Remove optional hex drive hub or hand wheel 12 10 from M3 jackscrew 4 30 2 2 1 2 3 Remove caution tag 12 40 from M3 jackscrew 4 30 2 2 1 2 4 Loosen and remove hex nut 4 40 from M3 jackscrew 4 30 NOTE For CBA730 through CBA1030 M3 or M3HW models the M3 jackscrew 4 30 cannot be removed now The M3 used in these models can be removed later in this procedure using step 2 2 7 2 2 ...

Страница 13: ...BA1030 standard housing adapter stop screw or extended stop ES use step 2 3 1 1 CBA730 M3 M3HW through CBA1030 M3 M3HW use step 2 3 1 2 2 3 1 1 CBA730 through CBA1030 housing adapter stop screw or extended stop screw ES 2 3 1 1 1 Loosen and remove hex nut 6 40 and washer 6 90 from stop screw 6 30 located in housing adapter 6 10 2 3 1 1 2 Remove stop screw 6 30 from housing adapter 6 10 NOTE ES 6 3...

Страница 14: ...e position indicator 1 50 from torque shaft 1 30 2 3 5 Remove retaining ring 2 90 from torque shaft 1 30 2 3 6 Remove thrust washer 2 80 and thrust bearing 2 70 from torque shaft 1 30 2 3 7 Remove the torque shaft 1 30 by pushing it out the bottom of housing 1 10 2 3 8 Remove yoke key 1 40 from torque shaft 1 30 2 3 9 Remove yoke 1 20 from housing 1 10 2 3 10 Actuator equipped with a M3 or M3HW mo...

Страница 15: ...WITH NEW 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 Before installation coat all moving parts with lubricant 3 1 4 2 Coat all seals with lubricant before installing into seal grooves 3 1 5 Torque shaft upper bearing and ...

Страница 16: ...to outer diameter seal groove located in the M3 jackscrew adapter 6 55 3 2 1 3 Apply a light coating of lubricant to the threads of M3 jackscrew 6 30 3 2 1 4 Install and rotate the M3 jackscrew 6 30 into M3 jackscrew adapter 6 55 NOTE Rotate the M3 jackscrew into the adapter until the inboard end of the jackscrew is up against the adapter 3 2 1 5 Install M3 jackscrew adapter 6 55 with M3 jackscrew...

Страница 17: ...d install in the grooves located in the upper torque shaft through hole of housing 1 10 NOTE The cup of wiper seal will be installed facing down into the housing 3 2 5 Coat u cup seal 2 40 with lubricant and install into the groove located in the lower torque shaft through hole of housing 1 10 the inner most groove nearest the yoke 1 20 NOTE The cup of rod wiper seal will be installed facing into ...

Страница 18: ...al groove located in the center bar hole of housing adapter 6 10 3 2 16 Install hex nut 8 20 onto one end of center bar 8 10 3 2 17 Coat entire length of center bar assembly 8 10 with lubricant including the threads 3 2 18 Insert center bar assembly 8 10 into the center hole of housing adapter 6 10 Slide center bar assembly through housing adapter until center bar assembly nut is flush against the...

Страница 19: ... 3 3 2 1 and 3 3 2 2 3 3 2 1 Install cylinder adapter 4 15 onto housing flange with the stepped outer diameter of cylinder adapter 4 15 facing away from housing 1 10 3 3 2 2 Install one o seal 5 15 onto stepped diameter of cylinder adapter 4 15 3 3 3 Coat all areas of piston 4 50 with lubricant 3 3 4 Coat rod bushing 5 50 with lubricant and install into the internal rod bushing groove located in t...

Страница 20: ...BA730 models install the lubricated cylinder 4 10 over the piston and up against the O ring seal on the flange of housing 1 10 3 3 13 Coat O ring seal 5 20 with lubricant and install into inner diameter seal groove located in the center bar hole of end cap 4 20 NOTE Actuators equipped with an end cap M3 jackscrew 4 30 pre install M3 into end cap 4 20 per step 3 3 14 and then install pre assembled ...

Страница 21: ...he ES cylinder stop screw or M3 jackscrew 4 30 is at the top of the actuator WARNING COMPLETE STEP 3 3 17 If step 3 3 17 is not completed as described the center bar O ring seals 5 20 may become a source of pressure leakage and cause the actuator to fail 3 3 17 Install the second hex nut 8 20 onto the cylinder end of center bar 8 10 Adjust the two hex nuts 8 20 such that the approximate same numbe...

Страница 22: ...nd cap 4 20 3 3 20 M3 hex drive hub or hand wheel 12 10 installation as follows 3 3 20 1 Install hex drive hub 12 10 or handwheel 12 10 onto M3 jackscrews 4 30 and 6 30 Align the hole of the drive hub with the hole located in the outboard end of M3 jackscrew 4 30 and 6 30 3 3 20 2 Install caution tag 12 40 onto M3 jackscrews 4 30 and 6 30 3 3 20 3 Install retainer ring 12 30 and groove pin 12 20 i...

Страница 23: ...e pressure listed in step 4 1 3 to both sides of the piston Repeat this cycle approximately five times This will allow the new seals 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 Cylinder to housing joint on CBA730 or cylinder to c...

Страница 24: ...ust be performed again 4 1 10 Shell Pressure Test Optional pressure 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 ...

Страница 25: ...uator Disassembly step 2 1 General Disassembly 5 3 1 Stop screw 6 30 removal from housing adapter 6 10 5 3 1 1 Loosen and remove hex nut 6 40 and washer 6 90 from stop screw 6 30 located in housing adapter 6 10 5 3 1 2 Remove stop screw 6 30 from housing adapter 6 10 NOTE Prior to reassembly review all of Section 3 Actuator Reassembly step 3 1 General Reassembly 5 3 2 ES 6 30 installation into hou...

Страница 26: ...emoval from end cap 4 20 5 4 1 1 Loosen and remove hex nut 4 40 and washer 4 90 from stop screw 4 30 located in end cap 4 20 5 4 1 2 Remove stop screw 4 30 from end cap 4 20 5 4 2 ES 4 30 installation 5 4 2 1 Lubricate ES 4 30 and install into end cap 4 20 5 4 2 2 Install O ring seal 5 30 onto ES 4 30 NOTE Move the O ring seal 5 30 down the ES until it is next to the end cap 4 20 5 4 2 3 Install w...

Страница 27: ...ousing Disassembly steps 2 3 2 and 2 3 3 5 5 3 Prior to actuator reassembly review all of Section 3 1 General Reassembly 3 2 Housing Reassembly and 3 3 Pneumatic Cylinder Reassembly 5 5 4 If new M3 housing adapter 6 10 is not pre assembled with the M3 then assemble M3 to the housing adapter 6 10 per Section 3 2 step 3 2 1 WARNING M3 INSTALLATION LIMITATIONS The M3 cannot be installed on a standard...

Страница 28: ... 20 is not pre assembled with the M3 then assembly M3 to the outer end cap 4 20 per Section 3 3 step 3 3 14 WARNING M3 INSTALLATION LIMITATIONS The M3 cannot be installed on a standard CBA actuator unless the M3 targets are installed on the piston assembly as shown in Figure Number 2 If the M3 is operated with a piston that does not have a target the groove pin 12 20 is subject to failure 5 6 5 Ad...

Страница 29: ...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 30: ...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 31: ...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 32: ...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 VAWCO2755 May 2012 C UPDATED C Rico May 2012 VAWCO2746 Aug 2015 D UPDATED C Rico Aug 2015 Signatures on file Bettis Houston Texas ...

Страница 33: ...ce Instructions 137462E Rev D August 2015 29 Appendix Appendix Appendix A List of Tables Table 1 CBA 300 Model Numbers 1 Table 2 Actuator Weight 4 Table 3 Fault Location Table 25 Table 4 Revision Overview 28 ...

Страница 34: ...August 2015 Service Instructions 137462E Rev D 30 Appendix Appendix Appendix B List of Figures Figure 1 Bushing Installation 15 Figure 2 M3 Targets 23 ...

Страница 35: ...Service Instructions 137462E Rev D August 2015 31 Appendix Appendix Appendix C List of Drawings C 1 Part No 129742 CBA300 Assembly Drawing ...

Страница 36: ...August 2015 Service Instructions 137462E Rev D 32 Appendix Appendix C 2 PartNo 129744 CBA300 M3HWAssemblyDrawing ...

Страница 37: ......

Страница 38: ...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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