Graham Corporation
8
2.6 Belt Drives
CAUTION:
TO PREVENT PERSONAL INJURY, DO NOT OPERATE THE
PUMP WITHOUT PROPERLY GUARDING THE DRIVE BELTS.
When pumps are supplied with belt drives, follow the belt manufacturer’s instructions to set the
tension.
2.7 Service Liquid Piping Arrangements
The operating principle of a liquid ring pump depends on a continuous supply of clean service
liquid, which is normally water. The liquid enters the pump through a connection on the casing
and is discharged from the pump along with the gas. There are two basic piping arrangements
that can be used for liquid ring pump applications. A once-through method with no recovery of
the service liquid and a recirculation method which re-uses the service liquid.
Both of these arrangements have four basic elements:
1) A supply of service liquid.
2) A means to control flow of service liquid.
3) A means of stopping the flow of service liquid when the pump is off.
4) A means of separating the gas / liquid exhaust mixture.
It is recommended to use a strainer to ensure that foreign matter does not enter the pump with
the service liquid supply or make-up source. See Diagrams 1 and 2 for the proper piping
arrangement scheme.
CAUTION: COMPLETE ALL PIPING INSTALLATION AND MAKE SURE A
SUPPLY OF SERVICE LIQUID IS AVAILABLE BEFORE
STARTING THE PUMP.
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