ANSI HI 9.5-2000 pdf download Pumps – General Guidelines for Types, Definitions, Application, Sound Measurement and Decontamination
9.2.1.47 smothering gland: A gland that has pro- vision for introducing liquids at lower temperature than the liquid being pumped, to condense vapors that may escape through the stuffing box packing or mechanical seal.
9.2.1.48 steam jacket: A passageway through which steam can be circulated to control the tempera- ture of the pumped liquid without coming in contact with the pumped liquid.
9.2.1.49 stop valve: A valve used to stop the flow in a fluid-handling system.
9.2.1.50 stuffing box: The portion of the casing or cover through which the shaft extends and in which packing or seal is placed to limit leakage.
9.2.1.51 stuffing box bushing: A replaceable sleeve or ring placed in the end of the stuffing box opposite the gland.
9.2.1.52 suction nozzle: A portion of the pump casing that serves as an adapter or connection between the pump and suction piping.
9.2.1.53 tachometer: An instrument that mea- sures the revolutions per minute of a rotating shaft.
9.2.1.54 timing gear: A part used to transmit torque from one rotor shaft to another and to maintain the proper angular relationship of the rotors. It may be outside or inside the pumping chamber and is some- times called a pilot gear.
9.2.1.55 torsional dynamometer: A measuring device used to determine the torque being transmitted in a power train.
9.2.1.56 transmission dynamometer: A device used to determine pump input power.
9.2.1.57 universal joint: A device used to connect shafts that are not necessarily aligned.
9.2.1.58 vacuum breaker piping: A pipe connecting the vacuum breaker valve to the pump.
9.2.1.59 vent piping: A device that releases or “vents” air out of the pump or piping system.
9.2.1.60 venturi meter: A form of flow measuring device that contains no moving parts and operates on the principle of pressure to velocity conversion.
9.2.2 Slurry application terms
9.2.2.1 apparent viscosity: The viscosity of a non-Newtonian slurry at a particular rate of shear, expressed in terms applicable to Newtonian liquids.
9.2.2.2 critical carrying velocity: The mean velocity of the specific slurry in a particular conduit, above which the solids phase remains in suspension, and below which solid-liquid separation occurs.
9.2.2.3 effective particle diameter: Single size particle used to represent the behavior of a mixture of various sizes of particles in a slurry. This designation is used by some engineers to calculate system requirements and pump performance.
9.2.2.4 friction characteristic: A term used to describe the resistance to flow that is exhibited by solid-liquid mixtures at various rates of flow.
9.2.2.5 heterogeneous mixture: A mixture of solids and a liquid in which the solids are not uniformly distributed.
9.2.2.6 homogeneous flow (fully suspended solids): A type of slurry flow in which the solids are thoroughly mixed in the flowing stream and a negligible amount of the solids are sliding along the conduit wall.