Product Manual

QT/QTS Series Quincy Compressor

50161-108, January 2013 30 3501 Wismann Lane, Quincy Ill. - 62305-3116

Manual Tank Drain Valve Operation

The manual tank drain valve is located on the underside of the air tank. Some

tanks use an internal drain tube (Refer to Fig. 3-18, Internal Drain Tube)

to drain the moisture. Tank pressure is required to force moisture out of the

tank through the drain tube. Safe removal of tank moisture from the air tank

is dependent upon an internal tank pressure of no more than 30 PSIG. Higher

internal tank pressures are dangerous and could cause serious injury!

Oil and moisture residue must be drained from the air receiver

daily or after each use. Accumulations of oil residue in the receiver

can be ignited by embers of carbon created by the heat of compres-

sion, causing an explosion, damage to property and injury to per-

sonnel.

Do not open a manual tank drain valve on any air tank containing

more than 30 PSIG of air pressure!

Never attempt to relieve an air tank by removing a pipe plug or

any other system component!

Manually Draining An Air Tank:

Step 1) Disconnect & lockout the compressor from the

power source (electric models) or disconnect the spark

plug wire from the spark plug (gas engine models).

Step 2) Tanks subjected to freezing temperatures may

contain ice. Store the compressor in a heated area before

attempting to drain moisture from the tanks. Reduce

the air pressure in the tank to 30 PSIG by pulling the

pressure relief valve ring (refer to Fig. 3-19, Checking

Pressure Relief Valves & Relieving System Pres-

sure).

Step 3) Slowly open the drain valve and allow the

moisture and air mixture to drain from the tank.

Step 4) Once the moisture has been completely drained,

close the drain valve.

WARNING !

Fig. 3-19 Checking Pressure Relief Valves

& Relieving System Pressure