ANSI HI 9.1-9.5-2000 pdf download Pumps – General Guidelines for Types, Definitions, Application, Sound Measurement and Decontamination
9.2 Definitions HI General Pump Definitions
9.2.1 Hardware terms
9.2.1.1 accumulator: A mechanical device which stores pressure energy of any noncompressible liquid held under pressure by an external source against some dynamic force.
9.2.1.2 alleviator: A device, usually a pressure vessel with a liquid-gas interface used to absorb or reduce the hydraulic “shock” or “water hammer” caused by rapidly closing valves.
9.2.1.3 bearing: A device which supports or positions the pump shaft. It may be either a rolling element bearing (ball or roller) or fluid film type (sleeve and journal), and it may be internal (wetted by the pumped liquid) or external.
9.2.1.4 body: An external part which surrounds the periphery of the pumping chamber. It is sometimes called a casing or a housing.
9.2.1.5 burst disc (rupture): A thin membrane or diaphragm, usually of metal, fitted in a suitable holder in the wall of a pressure vessel. Physical proportions of the disc are selected so that it will rupture at a pre- determined pressure, thus providing virtually unob- structed passage for pressure relief.
9.2.1.6 bypass piping: Alternate conduit through which liquid may be made to flow around any compo- nent(s) in a liquid handling system.
9.2.1.7 check valve: A valve which permits flow in one direction only.
9.2.1.8 column, piping: A vertical pipe by which the pump is suspended.
9.2.1.9 compound gauge: A gauge capable of measuring vacuum and pressure.
9.2.1.10 dead weight tester: An instrument used for calibrating gauges. Known hydraulic pressures are generated by means of weights loaded on a calibrated piston.
9.2.1.11 dynamometer (see transmission dynamometer): A device used to determine pump input power.
9.2.1.12 eddy current drive coupling: A device in which drive coupling excitation of a coil sets up a mag- netic drag that controls the output speed.
9.2.1.13 end plate: An external part that closes an end of the body to form the pumping chamber. One or more are used, depending on the construction of the pump. It is sometimes called a head or cover. 9.2.1.14 flexible coupling: A device for connect- ing two rotating shafts that is designed to accept lim- ited, varying amounts of misalignment between shafts.
9.2.1.15 fluid drive: A drive in which hydraulic fluid serves as a means of transmitting power from one part of the system to another.
9.2.1.16 foot valve: A check valve installed at the foot of the suction line.
9.2.1.17 gland, packing: An adjustable follower that compresses packing in a stuffing box.
9.2.1.18 heat exchanger: A device that transfers heat from one fluid to another.
9.2.1.19 inlet or suction port: One or more openings in the pump through which the pumped liquid may enter the pumping chamber.
9.2.1.20 jacketed pump: A pump in which the body and/or end plates incorporate passageways through which steam, oil, water or other fluids can be circulated, typically to control the temperature of the pump and/or the pumped liquid.
9.2.1.21 lantern ring: Sometimes referred to as seal cage and used in the stuffing box between pack- ing rings to provide a means of introducing lubrication or sealing mediums in the packed stuffing box.
9.2.1.22 lip seal: A device that normally statically seals on its outside diameter by means of an interfer- ence fit and also dynamically seals to a rotating or reciprocating shaft by means of a flexible, radial- loaded lip.