AEC VacTrac Series Conveying Systems - Manual (Page 93)

VacTrac™ Series Conveying Systems Page 93
Mechanical Components WH2-605A.4
Reinstalling Lower Valves
1. Replace the O-rings in the machined body.
2. Position the valve on the vacuum power unit. Tighten the
set screws that secure the valve to the blower outlet.
3. Reconnect the valve to the T-Y tube by sliding the radiator
hose back into place. Tighten the hose clamps.
4. Reconnect the copper compressed air tube to the fitting on
the lower valve.
5. Push the discharge silencer into the valve body, and secure
it with the screws. On units with optional sound enclosures,
push the short silencer into the valve body, reinstall the U-
bend, and secure both ends with the radiator hose and hose
clamps.
25 and 30 HP (18.65-22.38 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 on the upper
valve.
3. Loosen the set screws securing the inlet filter, and remove
the filter.
4. Loosen the hose clamps that connect the upper valve to the
T-Y tube, and slide the hose back.
5. Loosen the set screws that secure the valve to the blower
inlet.
6. Remove the valve from the power unit.
Disassembling Upper Valves
1. Remove the pipe coupler and the pipe nipple from the
valve.
2. Remove the two (2) socket cap screws from the upper cap,
and remove the upper cap from the valve body.