1. Copyright © 2016 by The S.E.A. Group

2. Fit the SR900 Sling the neck strap around your neck
Copyright © 2016 by The S.E.A. Group

3. Fit the SR900 Sling the neck strap around your neck
Start from the bottom: fit the mask to your chin
Copyright © 2016 by The S.E.A. Group

4. Fit the SR900 Sling the neck strap around your neck
Start from the bottom: fit the mask to your chin
Cup the mask over your mouth and nose
Copyright © 2016 by The S.E.A. Group

5. Fit the SR900
Pull the upper strap with the rubber patch up and over your head
Make sure the upper strap sits on the crest of your head
Copyright © 2016 by The S.E.A. Group

6. Fit the SR900
Unclip and adjust the buckle if you need to tighten or loosen the strap. Close the buckle.
Even out tension by pulling the lower strap outwards a few times on both sides
Copyright © 2016 by The S.E.A. Group

7. Fit a filter
Make sure the filter holder is clean, intact and fitted with an inhalation membrane
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8. Fit a filter
Match up the bayonet fitting of the filter holder to the one in the mask
Copyright © 2016 by The S.E.A. Group

9. Fit a filter Insert the filter holder in the mask
Give it a ¼ turn clockwise to lock it in position
Reverse action to detach
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10. Fit a filter
Make sure the filter is turned the correct way (arrows toward mask)
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11. Fit a filter Place filter in the filter holder
Ease the filter securely into the groove
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12. Fit a filter Place a pre-filter in the pre-filter holder
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13. Fit a filter
Snap the pre-filter holder with pre-filter onto the main filter
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14. Check for leakage Fit the fully assembled respirator to your face
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15. Check for leakage
Cover the hole in the pre-filter holder with your hand
Breathe in and hold your breath for 10 secs
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16. Check for leakage
The mask should collapse slightly against your face and stay collapsed until you breathe out
If the mask returns to its normal shape quickly, there could be a leakage problem: tell your supervisor
Copyright © 2016 by The S.E.A. Group

17. Fit a hose
Make sure the hose is clean, intact, and fitted with an O-ring and an inhalation membrane
Single hose
Twin hose
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18. Fit a hose
Match up the bayonet fitting of the hose to the one in the mask
Copyright © 2016 by The S.E.A. Group

19. Fit a hose Insert the hose in the mask
Give it a ¼ turn clockwise to lock it in position
Reverse action to detach
Same action for single and twin hoses
Copyright © 2016 by The S.E.A. Group

20. Fit the hose to a device Check O-ring at end of hose
Line up lugs with slots in bayonet fitting
Give it a ¼ turn to lock in position
Reverse action to detach
Same for all devices with bayonet fitting
Copyright © 2016 by The S.E.A. Group

21. Connect SR900 to SR307 Adapter fits just like a filter
Copyright © 2016 by The S.E.A. Group

22. Use the remote filter holder
Fit the remote filter holder to the belt attachment. The square flange on the holder fits into the square hole on the attachment.
Slide the two parts together until the locking tongue locks into position.
Copyright © 2016 by The S.E.A. Group

23. Use the remote filter holder
You may choose to wear the remote filter holder horizontally or vertically.
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24. Use the remote filter holder
Horizontal or vertical, ensure that the hose connector is located on the upper side of the belt.
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25. Use the remote filter holder
Assemble the filter holder, filters, pre-filter and pre-filter holder
Copyright © 2016 by The S.E.A. Group

26. Use the remote filter holder
Match up the bayonet fitting of the filter holder with the remote filter holder
Insert the filter assembly into the remote filter holder
Give it a ¼ turn clockwise to lock it in position
Reverse the action to detach
Copyright © 2016 by The S.E.A. Group

27. Use the remote filter holder
The remote filter holder lets you wear the filter around your back on a waist belt.
The single hose is worn on either side of the body
The twin hose is worn on both sides of the neck
Copyright © 2016 by The S.E.A. Group

28. Prepare for welding Slip a protective cover over the hose.
Available for both the single and twin hose
If desired, secure with Velcro straps
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29. Prepare for welding
Fit the spark-catching mesh IN FRONT of the pre-filter in the pre-filter holder
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30. Prepare for welding The SR900 is ready for welding
Copyright © 2016 by The S.E.A. Group

31. Quick clean
Use warm soapy water and a clean soft cloth, or a Sundström cleaning tissue
Inspect and wipe the outside of the mask
You can leave the head strap on
Check that there are no cracks or other damage
Copyright © 2016 by The S.E.A. Group

32. Quick clean
Use warm soapy water and a clean soft cloth, or a Sundström cleaning tissue
Wipe the inside of the mask
Pay special attention to ‘nooks and crannies’ inside the respirator
Make sure the face rim and chin cup are clean
Copyright © 2016 by The S.E.A. Group

33. Quick clean
Replace the pre-filter with a new one and snap onto the main filter
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34. Quick clean
Store the assembled respirator in a sealed container away from any contaminants
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35. Thorough clean First, perform a quick clean
Remember to check for cracks or other damage
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36. Thorough clean
Remove the filter holder (if using) and wipe the inside of the filter holder
Pay special attention to the groove and the rim of the filter holder
Copyright © 2016 by The S.E.A. Group

37. Thorough clean
Remove each of the two exhalation valve caps on the mask
Gently pull the membranes out
Wipe the membranes and the valve seats clean
Check for cracks or damage
Reassemble
Copyright © 2016 by The S.E.A. Group

38. Thorough clean
Remove inhalation membrane from the filter holder or hose attachment
Check for cracks or damage
Clean membrane and valve seat
Reassemble
Make sure ALL valves are properly fitted.
Draw a few deep breaths through assembled respirator
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39. Thorough clean Make sure O-rings are fitted and intact
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40. Thorough clean If head strap is very dirty, remove and clean
Let dry before reattaching
Tip: use a toothbrush to clean
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41. Thanks for watching
Copyright © 2016 by The S.E.A. Group