Most analytical instrumentation - and the accessories designed to be used with these systems - utilize standardized tubing connections. However, as flow rates are being driven lower and with the increased use of capillary tubing in various fluidic applications, there is a growing need for scientists to make reliable tubing for which the receiving ports were originally designed. To help accomplish this goal, Upchurch Scientific® manufactures a wide range to Tubing Sleeves.
Upchurch Scientific Tubing Sleeves are made from PEEK? and FEP polymers and feature standard outer diameters and tightly controlled inner diameters. Each sleeve is carefully cut to precise length, cleaned and inspected to ensure proper performance. By simply slipping the appropriate sleeve over the tubing you are connecting and then using a standard fitting to make the connection, you are assured of good performance and minimal dead volume.
Because most capillary tubing connections are made into coned receiving ports, where the port is not designed to be used with capillary tubing directly, special care must be used to ensure a good connection. While custom ferrules can help make these connections, they only offer a fixed-length nose - and because most tubing pockets will vary slightly in length, this can lead to leaking or dead volume.
To help save overall expense while maintaining a concentric connection with minimal dead volume, Upchurch scientific recommends the use of sleeves. Because sleeves are not permanently attached to a ferrule, they can easily adapt to varying tubing pocket depths. Additionally, because they are manufactured using Upchurch Scientific extruded polymer tubing, you are assured of the concentricity of the resultant connection.