TERMS & DEFINITIONS
4
TERM
DEFINITION
AIR DISCHARGE SYSTEM
Dry bulk trailers are discharged using air pressure and are referred to as pneumatics. The discharge, aeration, top air, and blow down piping are described in a dedicated section of this manual. This refers or the intended use of the trailer, valves, seats and seals of a trailer that is intended to be used in the transportation of food products.
FOOD GRADE
HOPPER
Load carrying cavity of trailer.
LINE PRESSURE
Measured by a pressure gauge located in the hopper area street side. Line pressure is generated by the air supply from a blower introduced into the discharge system. This pressure should be lower than the tank pressure. essure relief device that protects the trailer from being over pressured. The pressure relief device must always be in proper working order. Often referred to as full trailer. It is a trailer with wheels at the front and rear. The front axle can rotate because there is a roller bearing (turntable) between the axles and the tank as Landing legs that are not adjustable or carried on the trailer. They are used to support an empty trailer. Measured by a pressure gauge located in the hopper area street side. Tank pressure is generated by the air supply from a blower introduced into the hopper. This pressure should exceed the line pressure for product to discharge.
PRESSURE RELIEF DEVICE
PULL TRAILER
STIFF LEG SUPPORT
TANK PRESSURE
TURNTABLE OR ROLLER BEARING
The turntable is located on the front of a pull trailer and is designed with roller bearings so that the lower frame and axles can rotate when the trailer is turning.
UNDERCARRIAGE
Support structure for kingpin plate and running gear.
WORKING PRESSURE
Pneumatic trailers are discharged by air pressure and the serial plate will display the working pressure of the vessel. Do not exceed this pressure.
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