Bettis P/N 137462E
Revision
"A”
Page 15 of 18
4.1.6.5 End cap (4-20) port "hole". Checks the piston to cylinder seal (5-40) and piston
to center bar seal (5-25).
4.1.6.6 Housing adapter (6-10) to housing (1-10) joint. Checks o-ring seal 7-10).
4.1.7
Apply the pressure listed in step 4.1.3 to the end cap inlet port and allow the actuator to
stabilize.
4.1.8
Apply a leak testing solution to the following areas:
4.1.8.1 Cylinder to end cap joint. Checks o-ring seal (5-10) on CBA730 or checks
o-ring seal (5-15) on CBA830, CBA930 and CBA1030 actuators.
4.1.8.2 Housing adapter (6-10) inlet port hole. Checks the piston to cylinder seal (5-40)
and piston to center bar seal (5-25).
4.1.8.3 End cap ES, stop screw or M3 jackscrew o-ring seal.
4.1.8.4 Remove pressure from pressure inlet port in the end cap (4-20).
4.1.9
If an actuator was disassembled and repaired as a result of this procedure, the above
leakage test must be performed again.
4.1.10 After the actuator is installed back on the valve all accessories should be hooked up and
tested for proper operation and replaced, if found defective.
SECTION 5 - FIELD CONVERSIONS
5.1
HIGH TEMPERATURE SERVICE (-10 TRIM)
5.1.1
Disassemble and reassemble actuator per Sections 1 through Section 4 using new -10
(high temperature) Service Kit.
5.2
LOW TEMPERATURE SERVICE (-11 TRIM)
5.2.1
Disassemble and reassemble actuator per Sections 1 through Section 4 using new -11
(low temperature) Service Kit.
5.3
ADD AN EXTENDED STOP (ES) TO HOUSING ADAPTER (6-10)
NOTE: Prior to disassembly review all of Section 1 Introduction and Section 2 - Actuator
Disassembly, step 2.1 - General Disassembly.
