Fluid Line Products”Wear Chek oil-sampling valve provides leak-free sampling of systemfluids without the need for system shutdown. The unit can be openedwith a pushbotton control. Double seal construction and automaticpositive closing ensure zero leak performance in return lines andblocks, oil galleries, and pilot circuits. The unit”s one-piece,T-shaped design is rugged and compact to support installation in tightspaces. Material of construction is Zinc-plated steel. Operatingpressure range is zero to 600 PSI. Minimum burst pressure is 2,400 PSI.Operating temperature range is -30 F to 250 F. Minimum particlerestriction is 400 microns.