Connectors threaded fittings

Fig.2.8 A connector with a slip-proof push-fit connection (left) and a threaded fitting connection. P, plastic tubing E, male end with slip-proof design B, connector body O. rubber O-ring F. threaded fining and PTFE tubing with flanged end.

There is a second basic type of compression fitting (Fig. 3.1b), the female fitting, which you will see on occasion. Some column ends have a protruding, threaded connector and will require this type of fitting. This fitting is made... 

D Fitting body E Fitting nut F Rubber washer G Stainless steel washer H Pair of nuts I Pair of nuts for connector J Threaded rod... 

Figure 3.34. Schematic diagram of the high-pressure thermobalance enclosure. A, end plate with threaded opening for gas inlet fitting B, Buna-N O-ring C. pressure cell D. high-pressure connector for control cable E, balance movement F. furnace chamber G. furnace thermocouple H, furnace heater wire in Marinite insulation J. hexdrive bolts K, end plate with threaded opening for gas outlet fitting (68).

The connectors can be divided into three groups, (1) push fitted, (2) threaded (Omnifit or Swagelok type), and (3) permanently glued. Push fitted are most common when properly made, they are reliable and have no dead volume. Threaded connectors are easy to reassemble, reliable but somewhat costly, being available as HPLC fittings, furnished with a standard thread. They are used in commercial setups, such as the CHEMIFOLDS in the TECATOR/BIFOK FIAstar Analyzer. 

E-I Standard Connections for Regulator Outlets, Torches, and Fitted Hose for Welding and Cutting Equipment. Establishes the dimensions of the threaded connector, the tailpiece, and the coupling nut for 18 different connections that may be used to connect gas hoses with torches and regulator outlets. Also specifies the performance requirements that must be met by the completed assemblies at the time of manufacture or rebuilding to promote safety and reliability in service (16 pages). 

Returning cylinders. Preparing Empty Cylinders for Eetum Be sure that the dust caps are ti tly screwed onto the male and female self-seaUng couplings and the nitrogen inlet caps are in place when the tanks are not in use. This is essential to prevent possible contamination and vapor leaks from the connectors. Make sure that the threads and internal body of all fittings are clean. 

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