Profile: Dl Fluid Power Company is a manufacturer of a wide range of hydraulic, pneumatic and industrial automation systems. Our products include seamless tubes, hydraulics control valves, hydraulic oil pumps, and power pack accessories. Single ferrule hydraulic fittings are three piece designs comprising of a socket having a conical seat, a hardened progressive ring and a nut. Our hydraulic fittings are fabricated from steel, brass and stainless steel.