Piston or Diaphragm: Chemical injection pumps are Geared up by using a piston or versatile diaphragm, which alterations the amount cavity while in the pump head and displaces the fluid currently being pumped.Our lobes are designed which has a ductile iron interior Main, and will be coated with rubber products such as NBR, HNBR, VITON, EPDM, or othe