|Balloon filling regulator.
This is a common type of regulator used to fill helium balloons from a high-pressure tank. The gauge reads the pressure of the tank itself (notice the scale goes up to 3000psi, a very high pressure). The regulator reduces the pressure to maybe about 50psi (this is not adjustable). To release helium you slip the balloon over the rubber nozzle and push it to one side or another. This type of regulator works only with latex balloons, not the metalized Mylar type. Those must be filled with a special ultra-low pressure regulator because they have no stretch: They go from being full to bursting over an extremely small range of gas volume, so they must be filled to a measured pressure, not to a certain volume.
Source: eBay seller npappas0013
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009