Parker 003371001 337 Series Brass Micrometer Flow Control Valve, 1/4" NPTF Port, 250 psi, Fine Adjustment, 28 scfm

The "337" Series Flow Control Valves meter flow of air in one direction and allow free flow in the reverse direction. The "337" Series valves are manufactured with a fine tapered needle providing precise flow control, even at low flow rates. The perimeter of the adjustment knob features numerical micrometer position markings providing a visual indication of the setting. Once the desired flow is selected, a set screw can be tightened to maintain the setting. Stainless steel needle, urethane check seal, buna N needle seals, aluminum knob, stainless steel spring and zinc- plated steel retainer. 2.28" Open height and 2.03" closed height. 28 scfm Adjustable flow and 75 scfm free flow at 100 PSIG inlet pressure with full pressure drop.