Stainless steel made,durable used; Seating type configuration, place stable; Has timing switch, heat preservation time controller, easy operation; Bakelite star type screw rod, when operation not scald one's hand; Has swivel, easy exhaust the concentrate water; Water level control prevent dryout function, prevent heating tube dryout; Press meter can display container pressure and temperature, easy visual; Safety value can control the pressure and sterilized temperature, safety and reliable; Exhaust value can exhaust the cool air and condensed water; Radial bulging configuration, easy operation; The airproof ring made of silicon rubber is not only durable but also with better result.