Welcome to YPS-Langley YPS-Langley Valves is a leading supplier of stainless steel and nickel alloy gate, globe and check valves for the hydrocarbon processing and chemical industries. For more details on the company and some of the projects weve worked on in the past, go to the . YPS-Langley performs a , including the design and manufacture of bespoke, specialist valves and.. Your business Update Now