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Operating instruction bladder accumulator BLAK - English
2
Function
2.1
General functional description
Roth pressure equipments are cylindrical pressure vessels with a separating element between gas
and fluid volumes (see Fig. 1-1).
They are used in hydraulic systems among others for energy accumulator.If the fluid pressure rises
above the gas filling pressure, hydraulic energy is stored in fluid form. This may be utilised for work
steps when the fluid pressure falls below the pressure of the compressed gas.
2.2
Filling and testing the pressure equipment
During or after filling with N2, use foaming agents to test all screwed connections, shut-off
valves, connections and joints for gas-tight sealing.
In principle, use Roth filling and testing device and observe the relevant operating
instruction.
The pre-inflation pressure (P0) depends on the ambient temperature (isochore behavior of N2, see
Chapter 2.2.1). Fill with N2 slowly up to 5 bar when pre-inflating the bladder, (bladder touching tank).
Ignoring this may incapacitate the bladder immediately.
The screw cap of the gas valve is to be mounted again after each filling procedure
.
Never use oxygen or other flammable gases to fill the pressure vessel
!
