ARO 4KB98 Needle Valve

The ARO 4KB98 Needle Valve is an inline pneumatic flow control valve designed for precise throttling in compressed-air systems, with 1/2 in NPT female inlet and 1/2 in NPT female outlet connections. It uses a knob-adjusted needle plunger for fine, incremental flow control and supports uni-directional operation, making it suitable for metering air in automation and packaging lines. The valve is rated for a maximum flow of 90 scfm and operates across a pressure range of 0 to 200 psi, with an ambient temperature tolerance from 0 °F to 200 °F. Its body is constructed from composite material, offering a compact profile with overall dimensions of approximately 3-3/8 in (height) by 1-5/16 in (width) by 2-13/16 in (length). The part is identified by 104104-N04 (Mfr. Model 104104-N04), and is the same class of inline needle valve associated with the 4KB98 catalog entry. This configuration and port sizing align with standard 1/2 in NPT pneumatic fittings, enabling straightforward integration into existing circuits where precise flow adjustment is critical.