For more than 10 years DWT is the no. 1 in tyre gas market with more than 2500 installed units in Europe und Asia. A perfect technical concept convinced our customers. Anyway there are still some open questions concerning tyre gas. We herewith try to give some professional answers:

Can the standard handfiller be used as well for nitrogen?
Yes, nitrogen is even better because it is dry and not oxidative.

Is it possible to fill the tyre directly on setting pressure with nitrogen?
Yes, this reduces working time and even improves the mixture of the gas in the tyre, because you purge it. This is only sensfull if you use s a nitrogen generator, because nitrogen from a cylinder is 50 times more expensive.

Is a high nitrogen purity harmfull for the tyre, because oxygen molecules can accumulate inside and increase the pressure?
At very high purities of nitrogen in the tyre theoretically oxygen molecules can accumulate in the tyre, due to lower partial pressure of oxygen. But normally you will never reach these high purities in the tyre, because the final purity in the tyre is always lower than the purity of the producing generator. Anyway this effect will never ever lead to pressure increase, because even nitrogen is leaving the tyre faster than oxygen is coming in. Mostly this argumentation is used to offer the customer a low quality nitrogen generator.

How many tyres should be filled with nitrogen to make an investment for a nitrogen generator economic?
Depending on type of generator the pay-off is reasonable if you fill more than 100 tyres/month.

Is tyre gas harmfull for environment?
No, nitrogen is produced from the air that you breathe, only the oxygen molecules are removed.

Is it possible to refill the tyre, which is already filled with nitrogen, at the petrol station with air?
Generallly yes, but you reduce the quality of tyre gas, because you fill up the tyre with air, which containes oxygen.

Is it useful to vacuumize the tyre, to improve the quality of the mixture?
No, full vacuum destroys the carcass and small vacuum is not really an improvement. It is better to purge the tyre or to fill straight on setting pressure.

Is nitrogen nocif?
No, but large volumes of nitrogen in small rooms can cause suffocation, because nitrogen purges as well the room and removes the oxygen. So a sufficient ventilation of the room must be provided.
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