1/ Squeeze the bladder to discharge the air from it. Lubricate the inside of the shell by turning it around its axis. Use either the process fluid or a similar liquid (to approximate. 10% of the accumulator volume for capacities up to 5 litres or 5% for higher capacities). If the liquid is low in viscosity (lower than 5cSt) consult OLAER.

2/ Lubricate the bladder and insert it into the accumulator shell. Check that the bladder is not folded or twisted. For a large capacity accumulators, use a suitable tool (a bladder extractor).

3/ Check that the charging valve slides freely. Insert the top plug and the anti-extrusion ring into the accumulator shell.

4/ Attach the bladder stem to the top plug with the locknut. Install the top plug assembly on the anti-extrusion ring and pull.

5/ Insert O-ring & back-up -ring. Make sure the back-up ring is not twisted. Reinstall the flange washer, the name plate and locking ring. Tighten up with a C spanner. Tighten gas valve with tube spanner.

 

Fluid port end

6/ Insert the fluid port and the anti-extrusion ring in the shell.

7/ Pull the fluid port once the fluid port and the anti-extrusion ring are inserted in the shell .

8/ Install the O-ring first, and then the back-up ring on the fluid port.

9/ Make sure the back-up ring is not twisted, (using an appropriate tool)

10/ Put the flange washer and the locking ring on the fluid port . Tighten up with a C spanner.

11/ Make sure the components are centered by striking lightly the fluid port body at various angle using a rubber mallet

12/ Tighten bleed plug on the fluid port.

13/ Before charging the accumulator with nitrogen, turn the accumulator shell around its axis to lubricate its inner wall evenly. Immediately after this operation, charge the bladder slowly with nitrogen to a pressure of 1 to 1.5 bar with the accumulator in the horizontal position. It is most important the bladder streches uniformally prior to it closing the poppet valve at the bottom of the Accumulator.

As a guide see charging process table.

Please note this is a slow process and should be done with a Nitrogen bottle regulator.