back pressure

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back pressure

[′bak ‚presh·ər]
(mechanics)
Pressure due to a force that is operating in a direction opposite to that being considered, such as that of a fluid flow.
(mechanical engineering)
Resistance transferred from rock into the drill stem when the bit is being fed at a faster rate than the bit can cut.

Back Pressure

 

the pressure of steam or gas at the end of the expansion process in a heat engine, such as a steam or gas turbine or a steam engine. The term “back pressure” is used to define the final pressure that exists when the expansion does not terminate in the condensation of the steam. In a steam turbine with back pressure, the exhaust steam is not condensed and, instead, is used as a source of heat for either an industrial process or another turbine.

back pressure

Pressure developed in opposition to the flow of liquid or gas in a pipe, duct, conduit, etc.; due to friction, gravity, or some other restriction to flow of the conveyed fluid.

back pressure

A pressure exerted backward; in a field of fluid flow, a pressure exerted contrary to the pressure producing the main flow. Specifically, the pressure inside the exhaust system of a reciprocating engine that prevents the flow of burned gases from the cylinders.
References in periodicals archive ?
To keep the backpressure as low as possible, BASF experts have developed innovative production and coating technologies.
Venting also allows the gating system to perform as designed, with a minimum amount of backpressure, resulting in faster fill times and increased production efficiency.
com/express), an innovative HPLC column designed to provide the analysis speed and resolving power of sub-2-micron columns with a 50% reduction in backpressures.
If there is a glitch in machine function can you readily see if it is in first, second, or backpressure stages?
Considering check-valve leakage, recovery-time variances, screw wear, higher backpressure for mixing colors, and other factors, a prudent safety factor would be 10% to 15% additional capacity.
Superficially porous particle technology, first introduced by Agilent, provides analytical resolution similar to sub-2 om particles, with significantly less backpressure, enabling rapid LC on any HPLC or UHPLC instrument.
Overfeeding the extruder creates compound backpressure in the feed opening.
The subject of the public contract is the supply and installation of a new backpressure turbine with a minimum output of 4 mw, which will operate with a pressure gradient of 6.
introduced its Machine Shut Off (MSO) nozzle that's said to provide positive gate opening and shut-off, eliminates drooling caused by backpressure, and improves cycle times through quicker recovery.
The slip ring design allows the tread to be stopped by hand due to the low backpressure rollers.
3ah (EFM) PHY-MAC (media access control) backpressure and OAM loopback.
Contract notice: Adjusting the energy management company deza, as - install backpressure turbine tg3