OpGL-XT™ Fabricated Angle Body Control Valve - Fabricated Angle Body Control Valve. In addition to our rugged, versatile line of standard Optimux OpGL Globe Control Valves, which are typically built with cast bodies in stainless or carbon steels, Trimteck also excels at engineering, designing, and manufacturing custom sliding stem valves with bodies fabricated from bar stock. We call these fabricated bar stock valves Optimux OpGL-XT Globe Control Valves.