Abstract: A hybrid pump includes an impeller, a magnetic drive configured to control rotation of the impeller, a drive shaft combined with the magnetic drive and a motor. The drive shaft rotates in response to rotation of an axis of the motor, the magnetic drive rotates when the drive shaft rotates, the impeller rotates in response to rotation of the magnetic drive, a drive body of the magnetic drive is formed of plastic, and the drive shaft is formed of metal.

Abstract: A plastic pump comprises a complete body having an inner body made of a fluorine resin and an outer body made of a plastic material by molding the plastic material in a first mold after fixing a pre-manufactured inner body to the first mold, an impeller made of a fluorine resin material by means of injection molding, and an impeller cover made of a plastic material by molding the plastic material in a second mold to protect the impeller, and a fluid transporting path is lined with the fluorine resin of the inner body.

Abstract: The present invention relates to a method for manufacturing a high performance butterfly valve liner, comprising: a pre-processing step of preparing in advance a PTFE sheet and a cap in a predetermined size and thickness; a first welding step of welding the cap on a hole after forming the hole at a specific position of the prepared PTFE sheet; a second welding step of welding the end of the PTFE sheet after the first welding so as to form the PTFE sheet in a cylindrical shape; and a flaring step of carrying out flaring for spreading the end of the cylindrical PTFE sheet in the shape of a trumpet by means of a flaring tool, thereby finishing a liner. According to the method for manufacturing a high performance butterfly valve liner of the present invention, easy and simple manufacture is possible thereby reducing work time and manufacturing costs. In addition, a large-diameter valve can be readily manufactured without limitations on the size to be formed.