With over 40 years of experience designing, engineering, & manufacturing Instrumentation Valves and Fittings , Hy-Lok continues to set the world standard for quality and performance. Hy-Lok manufactures Instrumentation Tube, Flare & Pipe Fittings in sizes 1/16 inch through 2 inch, Ball Valves, Double Block and Bleed, Needle & Check Valves. Hy-Lok USA, Inc. is the American Master Distributor with a team of over 100 years of sales & service experience in instrumentation valve & fittings projects