Advanced Fluid Power, Inc. 5780 I-10 Industrial Parkway , Theodore , Alabama 36582 USA About Solutions products Downloads Companies Advanced Fluid Power, Inc. Products Model HDC79 - Air Operated Hydraulic Valve Model HDC79 - Air Operated Hydraulic Valve From Hydraulic Directional Control Valves 0 Share Single Air Piloted OR Double Air Piloted Hydraulic Valve - 2 position OR 3 position. Most popular related searches hydraulically operated valve valve operator Customer reviews No reviews were found for Model HDC79 - Air Operated Hydraulic Valve. Be the first to review! Add your review Publish your review Great! review successfully added!