GLOSSARY TERMS, CONT.
Rated SCFM The nameplate flow of the air compressor or blower. Repulper Rotor and Extraction Plate
Steam Trap Steam traps are automatic valves used in every steam system to remove condensate, air and other noncondensable gases while preventing or minimizing the passing of steam. If condensate is allowed to collect, it reduces the flow capacity of steam lines and the thermal capacity of heat transfer equipment. Total System Head The static head of a pumping system plus the frictional head of the system, typically measured in feet. Vacuum Pump A mechanical device that removes gas from a volume to create a vacuum. Variable Displacement Capacity control for rotary air compressors that uses a valve that is built into the compressor casing to control output to match demand by varying the displacement of the rotors. Variable Frequency Drive (VFD) An electronic controller that adjusts the speed of an electric motor by modulating the power being delivered. VFDs provide continuous control, matching motor speed to the actual demands of the pump, fan, or motor system. Motor speed fully modulates as the frequency of the alternating current is adjusted by the VFD. Variable Speed Drive Often used interchangeably with VFD. These drives are often used on smaller motors, direct current (DC) motors and multiple speed motors that do not need full modulation. Variable Torque Torque requirement changes at different speeds. Equipment such as centrifugal pumps and fans are variable torque. Voltage The difference in electric potential energy measured in volts.
A mixing system for defibered dried pulp bales for use in paper making. Manufacturers have recently redesigned repulper rotors making them energy-efficient. The extraction plate allows for the fit of the new rotor to the existing system. Rotary Vane Compressor A type of positive displacement air compressor. Screw Compressor A type of air compressor that is a positive displacement type which means that a given quantity of air is trapped in a compression chamber and the space that is occupied is mechanically reduced. Soft Start A type of device used to reduce the in-rush current of a motor during start-up. Sparging To agitate (a liquid) by means of compressed air or gas entering through a pipe. Spline Rotor Upgrade for Refiners Refiners are upgraded with spline technology to allow the splined rotor to balance on a splined hub, which is mounted to a non-floating fixed shaft. This improves the rotor centering which in turn increases the refiner efficiency and performance. Static Head The difference in elevation in which a fluid is to be pumped, typically measured in feet. Static Pressure The pressure associated with lifting the fluid to the static head height.
32
Powered by FlippingBook