Marquest Scientific is a manufacturer of fluid handling products and offers over a dozen needle valve models, as well as the "L" series, and a variety of accessories and replacement parts.

Georg Fischer Piping Systems offers needle valves for a wide range of applications. Models include the 1/2" type 522 and the SYGEF PVDF type 522 available in glove and angle configurations.

Dragon is a manufacturer of a variety of products, including general purpose, barstock, soft seat plug style, rodable soft seat plug style with Teflon packed bonnets, and various other needle valves (including custom designed products).

NET motion is an authorized supplier for Applied Materials, Intel and Seagate, and provides a variety of needle valves in various sizes for a wide range of industrial applications.