Steven Levy Enterprises buys and sells new, unused, and used industrial surplus sampling valves. Browse our inventory of sampling valves available for purchase. Sampling Valves are valves dedicated to drawing a live sample from process piping. System operators use use the sampling valve to extract a sample from the production line, safely store it, and transport to a laboratory for analysis. Tell us what surplus sampling valves you have for sale or call us at 713-910-4337.