Product category:
Hydraulic Components
News Release from: Parker Hannifin | Subject: GAE permanent pressure gauge adapter
Edited by the Engineeringtalk Editorial
Team on 23 June 2004
Maintaining pressure is key to optimum
performance
Parker Hannifin's Cylinder Division has a new permanent pressure gauge adapter for use with BAE series bladder accumulators.
Parker Hannifin's Cylinder Division has a new permanent pressure gauge adapter for use with BAE series bladder accumulators In combination with any one of a number of pressure gauges, it offers users a clear indication of gas precharge pressure without the need to connect up a supplementary gauge
Designed specifically for use with bladder accumulators, the GAE permanent pressure gauge adapter will see use in a number of industrial applications; Parker is also keen to highlight its use in concrete pumping - an unusual, mobile sector application for this technology.
According to Andrew Delaney, from Parker's Cylinder Division: "This application is a graphic illustration of a bladder accumulator's performance capabilities as well as its tolerance to contamination".
"The new adapter enables optimum system performance to be maintained, while its steel construction offers a long, reliable service life".
"With chromated surfaces, corrosion is not an issue".
The relationship between precharge pressure and system pressure is critical if hydraulic applications are to maintain optimum efficiency.
Hydropneumatic accumulators provide a means of regulating performance by using the differing mechanical properties of liquids and gases.
As gases are compressible while liquids are not, gas compressed by fluid at system pressure enables energy to be stored and released when a predetermined pressure level is met.
This stored energy can be used to supplement pump pressure and allows smaller system components to be used.
Accumulators are also useful as a source of energy in emergencies and for damping pulsating flows due to pump action.
The adapter simply mounts onto the gas valve of the bladder allowing clear and unhindered access to both the pressure gauge and, space permitting, the gas valve on its side.
When adjustment is required, it can also be used in conjunction with a UCA charging and gauging assembly, which offers the benefit of quick and easy charging and monitoring of precharge pressure.
Maximum working pressure for the adapter is 330bar and its working temperature range is between -15 and +80C.
Connection to the bladder/accumulator is via a 7/8-14UNF port, the pressure gauge is attached using a G1/2 port and the gas valve port on the side is 1/2-20UNF - all common port sizes ensuring maximum compatibility.
Accumulators come in many guises; all performing similar functions.
These include acting as a supplementary source of energy when system pressure falls below precharge pressure, damping out any pump oscillations, improving system efficiency, supplementing pump delivery, compensating for thermal stresses in the system and absorbing hydraulic shocks.
They are precharged with an inert gas such as nitrogen, which is first compressed through precharging and then by the application of system pressure to the hydraulic fluid.
In this compressed state, the nitrogen acts as a gaseous "spring" storing energy which is released when system pressure falls below the precharge level.
Precharge pressures can be set by the manufacturer or by the customer using a charging and gauging kit.
These kits can also be used when the adapter is in use to perform supplemental checking and adjustment of precharge pressure. Request a free brochure from Parker Hannifin ...
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