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9.12 Abrasive Spider (optional)
The optional abrasive spider is a device that is mounted in the top head of the abrasive blaster. The
spider is installed on blasters that will be installed below an abrasive storage hopper. The spider
creates a void area above the blaster abrasive inlet keeping the abrasive from sitting on top of the
popup. Abrasive piled on top of the popup restricts movement and can prevent the popup from
properly sealing. Pour abrasive into the vessel top head and allow it to flow in and form the areas of
dead abrasive above the spider plate and to the sides as shown above. The gap should be
approximately 1/4". The spider spacers can be removed to lower the spider disk. The spacers can be
cut shorter if necessary.
Pinch point hazard. Vessel pressurization will close the popup. Keep hands and fingers away from
popup. Disconnect air supply prior to performing popup maintenance.
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