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How to Fill Nitrous Bottles (CONTINUED)
4. Tighten line.
5. Place the cylinder on the scale and note weight. There will be a slight weight increase due to nitrous control
valve assembly.
6. Fully open the valve on the Nitrous Oxide source bottle.
7. Slowly Open the nitrous control valve assembly.
8. At this point, it is recommended to carefully loosen the line leading to the cylinder to be filled until you hear
a hissing sound followed by a whitish cloud of liquid nitrous. This ensures that there is liquid in the line as
well as ensuring that the source bottle is not empty.
9. When this is seen, re-tighten the line.
10. Fully open the valve on cylinder to be refilled. Wait for pressure in the source bottle and bottle being filled
to equalize. Note the scale reading.
11. Open the air pressure control valve on the compressed air on/off valve assembly. Watch the scale reading.
12. Close the air pressure valve when cylinder being filled reaches its full weight.
Note: If cylinder being refilled reaches 1100 psi before the full weight of the bottle is reached, stop the
pump by turning off the compressed air valve. Invert the bottle and repeat this several times until
you feel the bottle temperature drop. You can then turn the pump back on and continue pumping.
Also, as the pressure creeps up in the bottle being filled, you may be able to hear the nitrous pump
slow down. This is normal as it is now trying to push the liquid nitrous into the now pressurized
(more dense) liquid in the bottle. At this point, is may help to invert the bottle while the pump is on
so that the new liquid now pushing through the gaseous (less dense) nitrous liquid in the bottle.
13. Close the valve on cylinder being filled.
14. Close the valve on nitrous control valve assembly.
15. Slowly loosen the line from cylinder being filled until you hear a light hissing noise.
16. Allow the all nitrous pressure to vent from the line. This should only take a few seconds.
If hissing persists, tighten line and return to step 13.
17. Close the valve on the nitrous oxide source bottle.
18. While holding the nitrous control valve assembly line pointed away from yourself, slowly open the valve on
the nitrous control valve assembly just enough to relieve contents left in feed line.
You have now completed the refill of the bottle.
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Edelbrock Nitrous Systems
2700 California Street
Torrance, California 90503
Tech Line (800) 416-8628
Tech Fax (310) 972-2730
Rev. 12/00