The pressure mechanical valve provides fast filling speed, no hygiene corner pocket, few sealing parts, and precise liquid level control. The whole valve is made of 304 stainless steel. The filling valve opens and begins filling when it moves down and touches the bottle mouth, the filling valve moves up and leaves the bottleneck when it finishes filling. The drink liquid supply adopts the automatic pneumatic valve magnetic liquid-level switch to control the liquid tank automatically. Rolling bearing made of stainless steel 304, the sealing ring is made of EPDM material, plastics is made of UMPE.