Profile: F. S. Welsford Company provides valves and process control equipment. We offer a complete line of pressure & temperature regulators, pneumatic & electric control valves, sanitary valves and accessories. We offer brands such as Sitron, Optimux and Aquatrol. Our process products include basket strainers, pressure switches, steam traps, bag filters, liquid filters and mechanical controllers. The Optimux butterfly control valve has cammed disc for accurate throttling. It has a flow capacity greater than globe, plug and cammed control valves. The PM50 hex power valve combines a primary block valve, a bleed valve and a secondary shutoff valve into one small unit. It is a line-mounted two valve manifold, that functions as a shutoff and bleed valve for static pressure instrumentation.