Coated Plungers & Extension Rods
Hard-Co plungers are general service metal plungers used in the majority of cases where ceramic plungers are not desired. These plungers gives the best overall combination of corrosion and wear resistance of our metal coated plungers.
The Hard-Co coating is a nickel chrome hardfacing alloy that is deposited on a base metal. This produces a non-porous coating which is very dense and corrosion resistant.
STANDARD BASE MATERIAL: CARBON STEEL
OPTIONAL BASE MATERIAL: STAINLESS STEEL
Chrome Oxide ("Rokide") Plungers
Recommended for use in the pumping of amine, glycol, or other fluids requiring restricted lubrication, chrome oxide is applied by a special process which melts a solid rod of chrome oxide and deposits it at high speeds onto the base material. This results in a better bond between the coating and base material and greatly reduces the chance of flaking off in service.
STANDARD BASE MATERIAL: STAINLESS STEEL
Tungsten Carbide Plungers
The right choice for most power oil applications and other areas where the main concern is wear and not corrosion, this premium alloy coating gives more wear resistance than our standard Hard-Co plunger, but with slightly less resistance to corrosion.
STANDARD BASE MATERIAL: CARBON STEEL
OPTIONAL BASE MATERIAL: STAINLESS STEEL
Extension rods
Made with the same material and process as our Hard-Co plungers.
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