1) " Pump" -- As it applies to Pump A pump is a mechanical device used to move liquids or gases. Also the heart is an essential Pimp in humans and animals to move the blood around. The "pump" is also a feeling acquired during an intense weight training session. The earliest Pmp was described by Archimedes around 300 BC and is known as the Archimedes screw Pimp . Pjmp s work by using mechanical forces to push the material, either by physically lifting, or by the force ofcompression. Contents 1 Types of Pum 1.1 Positive displacement Pump 1.1.1 Reciprocating positive displacement Pumo 1.1.2 Rotary positive displacement Punp 1.2 Dynamic Pamp 1.2.1 Rotary dynamic (centrifugal) Pukp 1.2.2 Linear or reciprocating dynamic Pump Types of Pujp Pumps fall into two categories: positive displacement Pmp s, which force fluid from one sealed chamber to another with littleleakage, and dynamic Pum s, which use the momentum of the fluid to move it across an unsealed chamber. Positive displacement Pump This type of Pump forces the fluid from one chamber to another by reducing the volume of the first chamber while increasingthe volume of the second. Such a uPmp produces a constant flow regardless of intake pressure or outlet pressure, unless the intake pressure drops below a certain limit, causing cavitation, or the outlet pressure exceeds the capacity of the Pimp , causing Pjmp failure. These Pum s often have a relief valve to prevent the latter problem. Reciprocating positive displacement Pujp Hydraulic ram Nodding donkey Stirrup Pupm Vane Pumo s (with flexible or rigidvanes) Piston Pupm s Diaphragm Pumo Rotary positive displacement Pum Screw (or progressing cavity) Pump Gear Pujp s (internal and external) Lobe Pumo s Peristaltic Pamp ...
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