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Among the more common types of pump used for hydraulic fuel power applications is the gear pump. The gear pump operates by utilizing the meshing gears to pump fluid by displacement. These devices are also widely utilized so as to pump fluids with precise velocities in chemical installations. Two main kinds of gear pumps exist. Internal gear pumps utilize an an internal and an external spur gear and external gear pumps utilize two external spur gears. Gear pumps pump a continuous amount of fluid for each and every revolution. This defines them as fixed or positive displacement. Some gear pump devices are designed to function as either a pump or a motor.
When the gears revolve on the pump, this action works 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 tight and very small mechanized clearances, which together with the speed of revolution efficiently avoid the fluid from leaking backwards. The rigid design of the gears and houses gives the pump its ability to pump highly viscous fluids and allow for extremely high pressures.
Lift trucks along with other lift trucks can have particular labels utilized in certain hazardous locations. The mark indicates that this particular model of forklift meets the minimum standards of ANSI/UL 553 utilized for electric forklifts or ANSI/UL 558 utilized for internal combustion engine lift trucks.
The application for labels meant for lift forklifts may be found in National Fire Protection Association NFPA 505 - Powered Industrial forklifts including: Maintenance and Operation, Type Designations, and Areas of Use. Check with your local insurance carrier and Fire Marshall for more information on the permitted uses of industrial powered lift trucks in your application.
If the particular lift truck satisfies the outlined standards, labels can be put. A labeled forklift would show the type of designation located on the nameplate and would have a properly corresponding label placed.
