... , resistance to wear, especially resistance to hydrofluoric acid.Zirconia ceramic plunger has a service life about 7~10 times longer ... As critical part in plunger pump, Zirconia plunger is widely used in electrical industry, ceramic industry, oil industry, food industry, ... replace metal plunger.It is shown that by applying Zirconia ceramic plunger in oil industry, production capacity of oil could ...