Product category:
Process Hardware (Pipes, Nozzles, Heaters, etc)
News Release from: AxFlow | Subject: Blacoh Sentry
Edited by the Engineeringtalk Editorial
Team on 29 June 2005
Pulsation dampeners protect process
systems
The Blacoh Sentry protects pipes, valves, fittings, meters and inline instrumentation from destructive pulsations, vibrations, surges, cavitation, thermal expansion and water hammer.
Pulsation and hydraulic shock created by the reciprocating nature of positive displacement pumps can have potentially damaging effects on a pumping system Typically defined as the amplification of a system's pressure and liquid flow, pulsation is most commonly caused by the acceleration and deceleration of the pumped fluid
This article was originally published on Engineeringtalk on 29 Jun 2005 at 8.00am (UK)
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However, it is possible to counter the effects of pulsation and hydraulic shock through the introduction of a pulsation dampener as close as possible to the pump outlet.
Charged to approximately 80-90% of the liquid line pressure, the pulsation dampener absorbs the pulsation, with the amount of pulsation absorbed being a function of the dampener size relative to the stroke volume of the pump.
Of the many types of pulsation dampener available, by far the most popular is now the hydropneumatic appendage type model, which consists of a pressure vessel containing compressed gas, generally air or nitrogen, separated from the process liquid by a diaphragm.
AxFlow's Blacoh Sentry range of pulsation dampeners has been developed to satisfy the widest possible mix of applications, where pressures can be as high as 276bar and temperatures ranging from -51 to +205C.
Capable of producing a near steady fluid flow up to 90% pulsation and vibration free, the Blacoh Sentry protects pipes, valves, fittings, meters and inline instrumentation from destructive pulsations, vibrations, surges, cavitation, thermal expansion and water hammer.
As a result, they can create a steady and continuous flow when dosing, blending or proportioning additives, as well as enabling a uniform application of material in spraying and coating systems.
Available from AxFlow for all positive displacement pumps with discharge sizes from 3.8 to 152.4mm, Sentry units are simple to install and suited to fast in-place maintenance.
Bodies are available in a full range of chemically resistant materials and bladders are suitable for even the most corrosive applications.
Pulsation dampeners are the most efficient and effective means of preventing pumping systems from the harmful effects of pulsation, and will also contribute to enhancing the all-round performance and reliability of the fluid handling equipment.
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