Gear uses the new technique that has the international advanced level in 80s' to be round arc sin curve dentition. Compared with involute gear, that there is no the outline surface during the period of intersection is the most out stanging merit.So there is no abrasion on the surface, running balance, no rudimental liquid phenomera, little noise, long natural life and high efficiency. The pump gets rid of the tie of troditional design, so it enters into a new field including design, production and use. The pump sets up transformation relief valve as overfreight protection.The whole circumfluenece pressure is 1.5 times as the pump rating expelling pressure according to need in the allowable range. But this kind of relief value can't be as reducer value for a long time, you can fix it as need .
There are two designs for the airproof of axes end, one is mechanical airproof ,the other is stuffing airproof, You can make sure by use and need.
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