Ball & Plug ValvesA VALVE IS A DEVICE THAT REGULATES, DIRECTS OR CONTROLS THE FLOW OF A FLUID BY OPENING, CLOSING, OR PARTIALLY OBSTRUCTING VARIOUS PASSAGEWAYS. Valves are technically valves fittings, but are usually discussed as a separate category V81Pressures rating of 68.9 bar (1000 psig) and 137 bar (2000 psig) Catalog Spec. Stainless Steel and Brass 1/8 to 1 in. Hoses Male Adapter, Female Adapter Tube Adapter DK-Lok Tube Fitting Adapter Hose Sleeve Brief Description DK-Lok Hose Adapter Fittings are designed for use with soft plastic or rubber tubing. Standard hose barb design is for use with hose sleeve or hose clamp. DK-Lok hose adapter fittings are reusable Stainless steel and brass construction. Stainless steel and brass construction.