As we know, the electronic tube is an essential accessory for high frequency preheating machine, and its quality is paramount.

Actually, for a long time before, the brand of electronic tube for high-frequency preheating machines was the well known brand---Toshiba. However, in March 2016, Canon officially acquired Toshiba's medical equipment division, including the renowned Toshiba electronic tube.

Therefore, Canon tube became the new industry leader as the primary supplier of tubes for high frequency preheating machine.

Nowadays, all newly purchased Shunhao brand preheating machines are equipped with the top brand high quality Canon Tube.

There are two models of vacuum tubes available for 10KW preheaters: the standard model 8T20RB and the cheaper E3130. The 8T20RB is a bit expensive, but features a long lifespan and excellent quality, while the E3130 is more affordable but has a shorter lifespan of 1.5 years.

Both models are using for 10KW preheater, 8T69RB is bigger and expensive one but long life time with high capacity; And E3130 is much smaller one and cheaper one, but short life time with limited capacity, which you need to replace it frequently.

So, we would like to suggest using the standard one 8R69RB, which is easier for you to maintain your production.

If you are looking for a preheating machine that guarantees quality and reliability, Canon Tube is an ideal choice, and Shunhao machine will be a good choice.