METAL PLUNGERS Don-Nan offers plungers for both insert and tubing pumps. Precision ground on the OD, our plungers meet all API specifications. Available in pin-end and box-end. Pins are available in Monel, stainless steel, alloy, and other materials as requested. SPRAY METAL Don-Nan's spraymetal plungers are recommended for severe corrosion and abrasive conditions. Our precision tubes are ground on the OD and flame sprayed with a nickel base alloy powder containing chromium, boron and silicon to create a hard coating (R'c 58/62). Available with different pins and also box end plungers for tubing pumps. CHROME PLATED Don-Nan's chrome plungers have a hard chrome plate (R'c 70) that are resistant to abrasion where corrosion is not a factor. Available in all sizes with box end plungers for tubing pumps. GROOVED PLUNGERS Available in both spray metal and chrome plated. OTHER PLUNGERS Soft Packed Cup & Ring Discpack Rings Pressure Actuated Ring Phenolic Ring Lubripump Plunger Special design's upon request