Emerson Bettis CBB Series User Manual

October 2015
Service Instructions
VA001-196-30 Rev. 1
20
Section 4: Actuator Testing
Actuator Testing
Section 4: Actuator Testing
4�1 Actuator Testing
4�1�1 Leak Test: A small amount of leakage may be tolerated. Generally, a small bubble
which breaks about three seconds after starting to form is considered acceptable.
4�1�2 All areas, where leakage may occur, are to be checked using a commercial leak
testing solution.
WARNING: DO NOT EXCEED RATED PRESSURE
Pressureisnottoexceedthemaximumoperatingpressureratinglistedontheserial
number tag (20).
4�1�3 All leak testing will use the customer normal operating pressure or the actuator
name tag normal operating pressure (NOP).
NOTE:
When testing the actuator use a proper adjusted regulator to apply pressure to the actuator.
4�1�4 Before testing for leaks, apply and release the pressure listed in step 4.1.3 to both
sidesofthepiston.Repeatthiscycleapproximatelyve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 CBB315, 420, and 525 or cylinder to cylinder
adapter to housing joints on CBB520 and 725 actuators.
4�1�6�2 Ontheoutboardendofhousing(1-10)atthecenterbarhexnut.Check
the center bar to housing O-ring seal (5-20).
4�1�6�3 Housing stop screw / ES / M3 jackscrew O-ring seal (2-30).
4�1�6�4 Torque shaft (1-30) to housing (1-10) interface. Check O-ring seals (2-25)
and (2-20).
4�1�6�5 End cap (4-20) port “hole”. Checks the piston to cylinder seal (5-40) and
piston to center bar seal (5-20).
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. Check O-ring seal (5-10) on CBB315, 420, and
525 or check O-ring seal (5-15) on CBB520 and 725 actuators.
4�1�8�2 Housing (4-10) inlet port hole. Checks the piston to cylinder seal (5-40)
and piston to center bar seal (5-20).
4�1�8�3 End cap stop screw or M3 jackscrew O-ring seal.
4�1�8�4 Remove pressure from pressure inlet port in the end cap (4-20).

Emerson Bettis CBB Series Specifications

General

Brand	Emerson
Model	Bettis CBB Series
Category	Controller
Language	English