Product Manual

QT/QTS Series Quincy Compressor
50161-108, January 2013 28 3501 Wismann Lane, Quincy Ill. - 62305-3116
Compressed Air Discharge System
The discharge piping should be of the same diameter as the compressor
discharge connection, or sized so that the pressure drop at any point in the
system does not exceed 10% of the air receiver pressure. Install aux iliary air
receivers near heavy loads or at the far end of a long system. This will insure
sufficient pressure if the use is intermittent, or sudden large demands are
placed on the system.
Discharge piping should slope to a drop leg (refer to Fig. 3-17, Typical
Drop Leg & Component Location) or moisture trap to pro vide a collection
point where moisture can be easily removed. All service line outlets should be
installed above the moisture traps to prevent moisture from entering the tool
or device using the air. Manual shutoff valves, protected by pressure relief
valves, should be installed at all service line outlets to eliminate leakage while
the tools are not in use.
The discharge piping from the tank of a stationary unit must be equipped
with a properly rated flexible connection. As with any piping, all parts of the
discharge piping should fit so as not to create any stress between the piping
and components.
Pneumatic Circuit Breakers or Velocity Fuses
The Occupational Safety and Health Act (OSHA), Section 1926.303, Paragraph
7, published in the Code of Federal Regulations 29 CFR 1920.1, revised July
1, 1982 states that all hoses exceeding 1/2” inside diameter shall have a safety
device at the source of supply or branch line to reduce pressure in case of a
hose failure”
These pneumatic safety devices are designed to prevent hoses from whip-
ping which could result in a serious or fatal accident.
Fig. 3-17 Typical Drop Leg & Component Location