Bellows Filler

Fill thermostat bellows with gas or liquid to charge them.
picture of Bellows Filler

Quick Stats


Salary Range
$18,000 – $49,000

Data from U.S. Department of Labor


What do Bellows Fillers do?

Fills thermostat bellows with gas or liquid to charge bellows, using vacuum tank or cabinet, crimping equipment, brazing iron, and solder seal equipment, by either of following methods: Inserts capillary tube of bellows into charging manifold of cabinet and closes cabinet windows to seal cabinet. Manipulates controls of cabinet to purge capillary tubes of air and fill tubes with gas. Observes gauges to verify that internal temperature of cabinet meets specifications, and turns valve to maintain specified gas pressure in bellows. Positions bellows assemblies into vacuum tank with bulb end down. Closes tank lids, tightens lugs to seal tank, and opens valves to create vacuum in tank. Turns valve on vacuum tank and connection line between vacuum tank and filling tank to draw liquid into tank and force liquid into bellows. Removes bellows from tank or cabinet and crimps bulb end of capillary tube to seal in gas or liquid fill, using crimping equipment. Brazes crimped end of tube, using brazing iron or solder seal equipment. Submerges portion of capillary tube in water, when filling tube with combination of liquid and gas, to partially condense gas. Places filled bellows in tray or storage boxes.


Should I be a Bellows Filler?

You should have a high school degree or higher and share these traits:
  • Detail Oriented: You pay close attention to all the little details.
  • Reliable: You can always be counted on to do a good job.
  • Levelheaded: You hold your emotions in check, even in tough situations.

  • How to become a Bellows Filler

    Bellows Fillers generally graduate from high school and get on-the-job training. Think about earning a Certificate or Associate’s degree to increase your chances of finding a good job. Check out these schools offering Bellows Filler-related education!
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