ANSI HI 9.1-9.5:2000 pdf download.Pumps一General Guidelines for Types, Definitions, Application, Sound Measurement and Decontamination.
ANSI HI 9.1-9.5 applies to all industrial/commercial pumps, including centrifugal, vertical, rotary and reciprocating types. It includes: types; definitions; design and application; airborne sound measurement and decontamination.
9.1 Types of pumps
industrial/commerical pumps are used in an infinite variety of applications, and many different configurations of design are used to satisfy these requirements.
The different designs can be typified diagrammatically, as shown in Figure 9.1 on the following page. The first distinction is the manner in which the machine adds energy and moves the liquid.
9.1.1 Positive displacement pumps
Positive displacement pumps add energy by trapping liquid in a confined space and forcibly moving it out of the pump and into the discharge pipe. This pumping action is done by one of three methods:
1) Reciprocating action of plungers, pistons, bellows or diaphrams;
2) Rotary action of mechanical devices such as gears, screws, vanes, etc.;
3) Blow case arrangements using pressurized air to displace liquid.
9.1.2 Kinetic pumps
Kinetic pumps add energy by high-speed rotating wheels or impellers and fall into the following categories:
— Centrifugal, both horizontal and vertical turbine types;
— Regenerative turbine;
— Rotating casing with pitot tube.
Each of the above pump types are described further in one of the sections of this series of standards as follows:
9.2 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 predetermined pressure, thus providing virtually unobstructed passage for pressure relief.
9.2.1.6 bypass piping: Alternate conduit through which liquid may be made to flow around any component(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.ANSI HI 9.1-9.5 pdf download.