Gate control valve CV-14,
Gate drain valve DV-23,
1 1/2 in.
Sight glass, SG-1
Waste water tank
Gage drain valve
Swing cheek valve SCV-24,
Gate drain valve DV-25,
Gate drain valve DV-20,
Drain valve, DV-22, 1 in.
10. Gate drain valve DV-19 2 in.
Figure 2-16. Lower Control Valves, Erdlator and Related Parts.
Close ventrock CV-6 (1, fig. 2-13) located above erdlator tank on raw water line to slurry feeder.
Open gate control valve CV-9 (3) located above erdlator tank on raw water main influent line.
Open gate control valves CV-10 (5) and CV-11 (7) located above erdlator tank in aspirator aeration manifold.
Close gate valve BPV-12, (4) located on water level alarm piping above erdlator tank.
Close drain cock DC-13 (9) located on water level alarm piping above erdlator tank.
Close the quick acting gate control valve CV-34, (4, fig. 2-17) located on coagulated water line to filter pump (1).