Appendix F. Civil Engineering Report Part 2

                                           SPEL AUTO CLOSURE DEVICE (ACD)

• SPEL ACDThe Automatic Closure Device (ACD) is found in the first chamber of a PuraceptorTM. The purpose of
the ACD is to close the separator off automatically when the maximum storage capacity of light liquid is attained.
The ACD is to ensure that in the event of a major spillage, pollutants do not pass into the drainage system; it
should not be regarded as a substitute for an automatic alarm / monitoring system.

Prior to installation
Prior to installation the ACD retaining tube should be covered to prevent ingress of concrete etc., which could fall onto the ACD and
upset it’s calibration.
Operation and Maintenance
If the tank should fill with light liquid, the ACD which is calibrated for a specific gravity of 0.85, will automatically sink and
close off the SPEL PuraceptorTM.
Normally routine maintenance would include removing light liquid intercepted within the PuraceptorTM. If a SPEL automatic alarm / monitoring
system is incorporated, it will automatically indicate when the PuraceptorTM should be emptied. Only in an emergency will the PuraceptorTM fill to
it’s maximum and operate the ACD.
In such an event the PuraceptorTM should be completely sucked out and the ACD lifted out. Check that the ACD is in good working condition – ie.
Lifting hook secure and sealed; float not leaking; knuckle joint free and clean; sealing ring intact and complete. Clean with warm soapy water
before re-inserting.
To re-insert the ACD, partially fill the PuraceptorTM with clean water (if necessary) to ensure the ACD when re-inserted remains floating.
Re-insert the ACD.


Finally check the ACD is floating after it has been replaced.

                                                                                        Automatic closure device SPEL PuraceptorTM Class 1
                                                                                                    separators (two chamber)
SPEL PuraceptorTM Class 1 separators – Two Chamber Models
Commissioning
After the tank has been installed, leave the water in.
1. Remove the ACD from the packing box, taking care not                                                                      S/S lifting hook, if fitted
   to cause damage.
                                                                               Water level
2. Insert the ACD into the retaining tube using the lifting eye, if fitted,                                         Initial operating position
   ensuring it floats correctly with the float (top section approx. 50mm)                                           of the automatic closure
   just visible above the water level.                                                                              device (no oil present)




                                                                                                                              Automatic closure
                                                                                                                              device tube



                                                                                                                              Automatic closure device
                                                                                                                              (closed position)




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