Your PressureBall tube will maintain the bounce in new tennis balls by repressurising the outside of the ball so that the internal pressure put into the ball at manufacture doesn’t escape. New balls are sold in pressurised cans for this very reason.
PressureBall is in essence a reusable pressure tube. Since new balls are manufactured with an internal pressure of 14 psi then those balls need to be stored in PressureBall at the same level. If you have balls that have lost some of their bounce then “PressureBall” will revive them.
Things to watch for:
You must release the pressure in PressureBall before the clamp will slide off
PressureBall should be stored warm (summer temperatures around 25 celsius , maximum 35 celsius at 20psi). The colder the environment that the tube is kept in, the slower the rejuvenation process will be.
If you store flat balls to revive their bounce you will notice that the pressure levels in PressureBall will drop over the next few days as the compressed air moves into the tennis balls. Keep repressurizing the tube to 20 psi to speed the rejuvenation process (The higher the tube pressure the quicker the rejuvenation process will be). This could take a week if the balls are quite soft. Once the tube no longer drops in pressure then store the balls at 14 psi.
If you try to restore very flat balls at 20psi you may find that the balls “collapse”. You will need to back off the pressure until the balls pop back into shape again and then repressurise to a level just below where they collapsed. Leave the balls at this level for a couple of days and then slowly increase the pressure in the PressureBall tube .
At 14 psi PressureBall can be left in high ambient temperatures (car interior during peak summer) without any adverse effects but if you are using the tube at 20 psi then it is not advisable to expose it to these types of high temperatures as the tube may stretch.
PressureBall comes with the closure clamp at the end of the tube and this allows the tube to take 1 to 8 tennis balls.
Do not move the clamp position further towards the open end of the tube than this position
If you want a shorter tube the clamp can be shifted further towards the inflation valve end but this must be done before you first inflate PressureBall . Once inflated , the tube between the inflation valve and the closure clamp will distort slightly and the clamp will not be able to seal the tube successfully along this distorted area . If you choose to clamp the tube at a shorter distance you can continue clamping in this position and you still have the option of clamping at a longer length later. If you subsequently choose to clamp at a longer length you will not be able to return to the short clamp position .
The Pressure ball pump is small and compact. If you are using more than one tube a larger pump will make the inflation process less tedious. Any bicycle pump or car tire pump will be suitable providing you have some means of measuring the pressure. Electric auto mini compressors are good. The pump supplied needs to be pumped twice after attaching to the valve to ensure accurate pressure readings on the gauge.
To Deflate the Tube
Depress the valve pin in the center of the valve using any sharp object , nail, hairpin etc. The most convenient method is to use the end of the lever on the top of the pump that is lifted to lock the pump to the valve during inflation.
If you are using your own pump please ensure it is correctly calibrated as many commercially available bicycle pumps can read incorrectly by more than 5psi.
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