AEC VacTrac Series Conveying Systems - Manual (Page 90)

Page 90 VacTrac™ Series Conveying Systems
WH2-605A.4 Mechanical Components
High Temperature
If operating temperatures are above the recommended limit for
filter bag material, damage may result.
Consult AEC Service for assistance if difficulties occur.
5-4 Maintaining VTPB Series Vacuum Power Unit
Non-Reversing Valves
Upper and lower non-reversing valves require periodic service to
keep VTPB Series vacuum power units operating at peak
efficiency. Contact the AEC Parts Department for information on
valve service kits and customer-recommended parts.
5 to 15 HP (3.73-11.19 kW) VTPB Units
Maintaining Upper Valves
Removing Upper Valves
1. Turn off and lock out the power switch for the vacuum
power unit. Disconnect and lock out the power main to the
unit; make sure to follow applicable safety regulations.
2. Turn off compressed air. Disconnect the compressed air
line running to the pressure relief regulator.
3. Loosen the hose clamps that connect the upper valve to the
incoming vacuum line and lower valve, and slide the hose
back.
4. Loosen the set screws that secure the valve to the blower
inlet.
5. Remove the valve from the power unit.
Disassembling Upper Valves
1. Remove the two (2) socket cap screws from the upper cap,
and remove the upper cap.
2. Remove the six (6) socket cap screws from the end plate.
Separate the end plate and air cylinder from the machined
body.