HNV-SSS34B is a series HNV needle valve 1-valve block manifold. The series HNV needle valve 1-valve block manifold is a barstock style needle valves designed for isolating instruments from liquids or gases. The valve series features fine threading and large seat area to ensure tight shutoff. Wetted materials are 316 SS and PTFE making these ideal for use with corrosives. The HNV has been tested to assure vibration and thermal stability.