Oliver Valves is a manufacturer of engineered-to-precision valves. It operates under three companies: Oliver Valves, Oliver Valvetek, and Oliver Twinsafe. The companies offer needle and ball valves, needle valve manifolds, monoflanges and slimline monoflanges, double block and bleed valves, injection valves, sampling valves, distribution manifolds, instrumentation products, as well as subsea and pipeline valves. Oliver Valves caters to oil, gas, and petrochemical industries.