MWH offers a wide range of high-quality inlet and exhaust valve spindles for the most demanding engine applications. For engines running on Gas or with low-Sulphur fuels, MWH has developed proprietary seat coatings to extend component life. MWH produces valve spindles from Nickel-based superalloys, stainless steels, and Iron-based alloys. Most valve spindles manufactured from these alloys can be welded with Stellite, Triballoy, Colmonoy, and MWH's proprietary hardfacing alloys.