Article Needle Valves (Bace5c9) Parker U Series Union Bonnet Valves have been engineered for use at pressures up to 6,000 (414 bar) and temperatures as high as 1,200 °F (649 °C). Instrument Bleed Valves - Bleed valves allow for quick, easy manual bleed-off of system pressure.Pressure injection carburetors are distinctly different from float-type carburetors as they do not incorporate a vented float chamber or suction pickup from a discharge nozzle located in the venturi tube. The needle valve is bi directional, while the flow control is one directional only. Technimex needle valves, also needle valve called plunger valves are used for flow control with high different pressures. For example, if you have a 2 inch Standard Port valve your flow characteristics will be closer to that of a 1.5 inch fluid path. AXEON Stainless Steel Needle Valves are manufactured from 316L Stainless Steel and feature a two piece, panel mountable design allowing for flexibility during installation.Confirm t...