December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
30
Section 3: Actuator Reassembly
Actuator Reassembly
3.6.22.3
The vent check port hole in housing. This checks Polypak seal (4 - 30) that
seals piston rod (3 - 40) to inner end cap (3 - 10).
3.6.22.4
Remove pressure from the pressure inlet port.
3.6.23
If an actuator was disassembled and repaired, the above leakage test must be
performed again.
3.6.24
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 parts will be tested in controlled
conditions in accordance with the requirement of PED by pressuring both sides of the
piston to avoid damage and over torquing of the actuator components. If further future
testing in the field is necessary, Emerson should be contacted for guidance.
