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5.6. Remove the jam nut to release the old actuator boss and o-ring. Clean the o-ringseat and apply sufficient high vaccum grease (Dow Corning) on the o-ring and it’sgroove. Install a new actuator boss and o-ringboss. The junction box can beremoved to make the removal and installation of the actuator boss easier.5.7. Refill the container (still in horizontal position) with the correct type and quantityof suppressant powder, using a funnel. When filling larger containers it isnecessary to incline the container slightly to prevent air becoming trapped in thecontainer.5.8. Clean the seat and install a new rupture disc and new O-ring. Apply sufficient highvacuum grease (Dow corning) on the O-ring and its groove.5.9. Re-install the holddown on the rupture disc, lubricate the bolts (item 19) andtorque to 81 Nm uniformly in a criss-cross pattern in one-third increments (26 Nm- 53 Nm - 81 Nm).5.10. Remove the opened spreader nozzle cover from the spreader nozzle assembly.Apply a new cover on the spreader nozzle.5.11. When a telescopic spreader nozzle is used, clean all the moving (not painted) partsand lubricate them with chassis grease. Inspect the condition of the quad-ring andexchange if necessary. Install the quad-ring on the tip of the nozzle to ensureoptimal nozzle position.5.12. Mount the container and re-install the container washers & nuts, torque uniformlyin a criss-cross pattern in one-third increments increments (26Nm –53Nm – 81Nm)using a torque wrench.5.13. Install a new actuator see SECTION 6.5.14. The container can now be pressurissed. Check the container identification plate forthe applicable fill pressure and pressurise with dry nitrogen (initial filling pressure:62 barg at 22°C ambient temperature). Refer to Figure 5 for the required fillingpressure when the ambient temperature differs from 22°C. Check for leaks using asuitable leak detection spray or liquid.Document 8.8601.00.4 Page 12
6 ACTUATOR INSTALLATION & HANDLINGWARNING: ONLY QUALIFIED FIKE PERSONNEL HAVE THE AUTHORITY TO INSTALL /REMOVE ACTUATORS.The actuators of the Fike Explosion Protection Systems are widely used in industrial applications butmust be respected for their extremely fast response and the possibility of accidental detonation. Whenactuators are handled in accordance with all proper safety practices, accidental detonations should notoccur.WARNING: TO PREVENT POSSIBLE INJURY, THE ACTUATORS MUST BE DISCONNECTEDAND SHUNTED WHEN PERFORMING ANY OF THE FOLLOWINGPROCEDURES.6.1 ACTUATOR ASSEMBLYEach actuator is transported in a safety boss with two safety caps. In order to exchange an overdueactuator, an additional, empty actuator transport boss is required to hold the overdue actuator.WARNING: ACTUATORS ARE INDIVIDUALLY LABELLED TO ENABLE PROPERIDENTIFICATION. DO NOT REMOVE THIS LABEL!In the figure below a detonator in safety housing is shown (typical arrangement).Figure 6: Detonator assembly (typical)N° Item description N° Item description27 Original cap detonator wire 33 Pipe28 Shunted lead wires 34 Detonator29 Detonator tag 35 Jam nut30 Cable length 1 m 36 Safety cap31 Retainer nut 37 O-ring32 2 component epoxy glue 38 Detonator bossDocument 8.8601.00.4 Page 13
Page 1 and 2: 8.8601.00.4EXPLOSION PROTECTION SYS
Page 3 and 4: TABLE OF CONTENTS1 INTRODUCTION ...
Page 5 and 6: 1 INTRODUCTION1.1 SCOPEThis documen
Page 7 and 8: Armed: the EPSC is active and will
Page 9 and 10: 3 HRD SUPPRESSION CONTAINER3.1 DESC
Page 11 and 12: 3.2.2 HRD-container: Component part
Page 13: 4 HRD SUPPRESSION CONTAINER INSTALL
Page 18 and 19: 6.2 PERSONAL SAFETY MEASURESWhen ha
Page 20 and 21: 7.2 PERIODIC INSPECTION:The followi
Page 22 and 23: 8 DE-COMMISSIONING PROCEDURE / CHEC

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