Home / Markets / WEAVALVES / Products / Valves / Valves / Needle Needle Needle valves are manual linear motion valves for precise flow control in low flow, small pipe applications. Models provide excellent performance and reliability. They have a tamper-proof design and blowout-proof stem. A few models are designed to be used in pressure or non-critical vacuum applications. Series NVII Economical, Pressures Up to 2000 psi, Blowout-Proof StemNeedle Valve provides easy flow regulation in all applications, including shut off and throttling for pressure gages and instruments. Years of maintenance-free service can be expected. Series HNV For Use with Gas and Liquids, Pressures Up to 6000 psiNeedle Valve 1-Valve Block Manifolds is a barstock needle valve designed for isolating instruments from liquids or gases. Features fine threading and large seat area to ensure tight shutoff. Ideal for use with corrosives. Model TNV All PTFE and PCTFE Wetted PartsPTFE Needle Valve is designed for laboratory and industrial applications for regulating corrosive gases and liquids for high purity services. Designed to be used in pressure or non-critical vacuum applications.