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A gear pump is amongst the most common types of pumps for applications of hydraulic fluid power. A gear pump works by using the meshing of gears in order to pump fluid by displacement. These devices are commonly used in chemical installations to pump fluid with specific viscosity. Two basic types of gear pumps are available. Internal gear pumps make use of an an internal and an external spur gear and external gear pumps make use of two external spur gears. Gear pumps pump a continuous amount of fluid for each revolution. This defines them as fixed or positive displacement. A few gear pump devices are designed to operate as either a motor or a pump.
As the gears rotate on the pump, this action works in order to separate the intake side of the pump, creating a suction and a void that is filled by fluid. This fluid is carried by the gears to the discharge side, whereby the fluid is displaced by the meshing of the gears. There are really small and tight mechanized clearances, that along with the speed of revolution effectively avoid the fluid from leaking backwards. The rigid construction of the houses and gears provides the pump its ability to pump highly viscous liquids and allow for excessively high pressures.
Lift trucks together with different forklifts can have particular labels for use in some hazardous locations. The mark denotes that this certain model of lift truck meets the minimum standards of ANSI/UL 553 used for electric lift trucks or ANSI/UL 558 meant for internal combustion engine lift trucks.
The use for labels utilized for lift lift trucks could be found in National Fire Protection Association NFPA 505 - Powered Industrial lift trucks including: Type Designations, Areas of Use, and Maintenance and Operation. Check with your local insurance carrier and Fire Marshall for additional information concerning the permitted uses of industrial powered lift trucks in your application.
If the forklift has been found to satisfy the outlined standards, the following labels can be attached. A marked truck will have the model designation put on the forklift nameplate and would have one of the following labels placed.
