Ratermann Manufacturing, Inc. Customer Service 1-800-264-7793 y Email [email protected] y Order Online at Web Store www.rmiorder.com 21D-5 DK-LOK TUBE FITTINGS Technical Information Tubing Handling Tubing Selection Material DK-Lok Tube Fitting Pressure Rating Gas Application Material Vacuum Application Cryogenic Application High Pressure Application Tubing system, tubing should be considered as one Tubing is assembled by simple wrench less assembly and maintenance costs. Tubing is bendable. It allows lower pressure drop with fewer connections. This in turn reduces system costs because of less fabricating manpower. re-assemble Piping requires skilled worker for welding & threading Hardness Tubing hardness must be selected according to the information in the table 2 to 13. Surface Tubing must have a surface free from scratches, draw mark, dirt, Ovality sealing system on nut, ferrules, and body. Wallthickness The table 2 to 13 list tubing working pressure ratings in a wide range of wall thickness. A too thin wall may collapse and a too thick wall may not properly be deformed by the ferrule action. Do not use tubing wall thickness not listed in the table 2 to 13. Weld tubing Welded tubing should have a not measurable bead on its outside diameter. ee sealing system. - including gas leak proof and vacuum tight service. Gases (helium, hydrogen, nitrogen, air, etc.) can escape even the most minute leak-path due to their very small molecules. Tube therefore must be handled not to have scratches, draw mark, Use NOT thin wall tubing for gas applications. Heavier wall tubing resists the ferrule action whereas thin walltubing may collapse with little resistance to ferrule action. For Gas service, use the tubing wall listed on un-shadowed section in table 2 to 13. DK-Lok Tube Fittings have been proved to be excellent vacuum tight seal in many applications including analytical industry. DK-Lok Tube Fittings comply with the leakage requirements of TA-LUFT 2002. elb ailer ylh gih e div o r p le e t S ss elniat S 6 1 3 S S ni s g nittiF k o L- K D performance on cryogenic application. Cryogenic temperature is considered to be temperatures below -100˚F (-73˚C). Pressure 500 psig (34.5 bar) or higher is considered generally high pressure. In the high pressure system scratches, draw mark, nicks, For gas application, select the gas applicable tubing wall thickness from Table 2 to 13. Follow the suggestion on tubing selection, handling, and installation. Careful handling and storage practices will protect tubing from unnecessary scratches, nicks, or degrading the good tubing surface Tubing ends should be capped so any foreign materials will not fall inside during transportation and storage. Do not drag across tubing rack, cement, gravel or any rough surface. Do use correct tube cutter for tube material. The wrong cutter may result in excessive deformation of the tube end. Do not cut deep with each turn of cutting. Tube cutters and hacksaws should be sharp enough. Hacksaw blades should have at least 32 teeth per inch. The pressure rating of DK-Lok Tube Fitting is rated to the working pressure of connective tubing. The allowable working pressure of tubing in various materials is listed in the table 2 to 13. . Tube Fittings All dimensions are in millimeters unless specified and only for reference subject to change.
