Barksdale Controls 9021-M-B Valve

The Barksdale 9021-M-B Valve is a 3-position directional control valve from the 9020 (Series 9000) family, engineered with Shear-Seal technology for reliable high‑pressure performance in demanding environments. It uses 1/4" NPT ports and delivers a closed-center flow pattern, with working media including air (pneumatic) and hydraulic oil. Rated up to 350 psi for either air or hydraulic service, it also lists a 250 psi back pressure rating and a 250 psi manipulator pressure; it carries a proof pressure of 1.5x working pressure except at the return port. Construction features Buna N gaskets, brass pressure seals, and an anodized aluminum body with a hard‑anodized aluminum rotor; net weight is 1.18 lb. Port size is 1/4" NPT with a minimum flow passage diameter of 0.375", and the valve is offered in 3-position detent variants (including -M, and also -MC and -MR). Common applications include acting as a pilot valve for pneumatic actuators, gas manifold controls, or manual control of 2-position cylinders.