Prefilter/Spark Arrestor
Use of the foam prefilter (3M™ Prefilter TR-6600) and metal mesh spark arrestor/prefilter (3M™
Spark Arrestor TR-662) is optional in many situations. They can be used individually or in combination.
Both act by helping to block larger particles from reaching the main filter, and if changed (TR-6600) or
cleaned (TR-662) frequently may help to extend the useable life of the main filter. The spark arrestor
may be cleaned by rinsing it under water. NOTE: Use of the spark arrestor is mandatory for welding
and all situations where the 3M™ Versaflo™ Powered Air Purifying Respirator TR-600 may be
exposed to sparks, molten metal or other hot particulates. Failure to use the spark arrestor when
needed may allow the filter to catch fire, or be damaged and allow contaminants to enter the
respirator and may result in injury, sickness or death. The foam prefilter and the metal mesh spark
arrestor must be used with a filter cover.
Filter Covers
Filter covers are available for each size of filter. Use of filter covers are highly recommended. Filter
covers help protect the filter body and filter media from damage from external forces. The filter cover
must be in place if operating the PAPR in a decon shower or while being subject to liquid spray. The
filter cover helps the PAPR resist water spray directed towards the wearer, such as if going through a
decon shower. The filter cover is required when using a prefilter or spark arrestor prefilter.
Install and remove HE filter, filter/cartridge, prefilter, spark arrestor and cover
Install and remove the filter/cartridge in non-hazardous locations only.
1. Inspect the filter/cartridge to be installed:
• Filter/cartridge is intact with no tears, cracks, distortion or other damage.
• The inner circular gasket is present and intact with no tears, cuts or distortions. Wipe the filter
seal with a clean cloth if necessary. Dispose of and replace filter/cartridge if damage is noted or
suspected. NOTE: The 3M™ Versaflo™ Powered Air Purifying Respirator TR-600/TR-800 Filter/
Cartridge Assemblies have both an inner circular gasket (Fig. 3-6) and outer rectangular barrier
(Fig. 3-5). The inner gasket is the primary seal between the filter and blower. The outer barrier
acts to keep dirt and debris from behind the filter.
2. To install the filter/cartridge:
• Confirm the TR-600 is powered off. Do not install or replace filter/cartridges while the motor/
blower is running.
Option 1: Using the filter/cartridge with prefilter/spark arrestor and filter cover.
Fig. 4 (Recommended for most applications.)
NOTE: Use the specified filter cover for the filter/cartridge. See "Specifications" section for correct pairing.
• Hold the filter cover so it faces down (Fig. 4-1).
• (If required) Insert the metal mesh spark arrestor/prefilter into the cover, ensuring the cutouts are
aligned properly (Fig. 4-2).
• (If required) Insert the foam prefilter, ensuring the cutouts are aligned properly (Fig. 4-3).
• Insert the filter/cartridge into the filter cover ensuring the bottom latching tab snaps into place
(Fig. 4-4). The filter/cartridge label must be visible in the cover window (Fig. 13).
• Place the hinge side of the filter/cartridge into the motor/blower (Fig. 5-1) and snap latch side into
the filter latch (Fig. 5-2).
• Gently tug on filter/cartridge to ensure proper attachment at both sides.
Option 2: Using the filter/cartridge without the filter cover.
(May typically be used in applications when filter/cartridges are changed very frequently to reduce
potential for cross-contamination.)
NOTE: Using the filter/cartridge without the filter cover leaves it more susceptible to damage from
external forces and liquid spray.
• Place the hinge side of the filter/cartridge into the motor/blower hinge (Fig. 5-1) and snap latch
side into the filter latch (Fig. 5-2).
• Gently tug on filter/cartridge to ensure proper attachment at both sides.
6