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3. Piping materials without flexibility such as steel tube piping, are prone to be effected by excess moment load and vibration from the piping side. Use flexible tubing in between to avoid such an effect. Caution 3. Refer to the Fittings and Tubing Precautions (pages 44 to 47) for handling One-touch fittings. 2. Wrapping of pipe tape When screwing piping or fittings into ports, ensure that chips from the pipe threads or sealing material do not enter the piping. Also, if pipe tape is used, leave 1.5 to 2 thread ridges exposed at the end of the threads. Winding direction Pipe tape Expose approx. 2 threads Air Supply Warning 1. Type of fluids Please consult with SMC when using the product in applications other than compressed air. 2. Take measures to ensure air quality, such as by installing an aftercooler, air dryer, or water separator. Compressed air that contains a large amount of drainage can cause malfunction of pneumatic equipment such as filters, regulators, and lubricators. Therefore, take appropriate measures to ensure air quality, such as by providing an aftercooler, air dryer, or water separator. 3. Drain flushing If condensation in the drain bowl is not emptied on a regular basis, the bowl will overflow and allow the condensation to enter the compressed air lines. It causes malfunction of pneumatic equipment. If the drain bowl is difficult to check and remove, installation of a drain bowl with an auto drain option is recommended. For compressed air quality, refer to Air Preparation Equipment Selection Guide (Best Pneumatics No. 5). 4. Use clean air. Do not use compressed air that contains chemicals, synthetic oils including organic solvents, salt or corrosive gases, etc., as it can cause damage or malfunction. When synthetic oil is used for the compressor oil, depending on the type of synthetic oil used, or on the conditions of use, there may be adverse effects on the resin of the pneumatic equipment or on the seals if the oil is flowed out to the outlet side, so the mounting of a main line filter is recommended. Piping Warning 1. To screw a piping material into a component, tighten with the recommended tightening torque while holding the female thread side. If the tightening torque is not enough, looseness and seal failure can occur. On the other hand, excess tightening torque can cause damage to the threads. Furthermore, tightening without holding the female thread side can cause damage due to the excess force that is applied directly to the piping bracket. 2. Avoid excessive torsional moment or bending moment other than those caused by the equipment’s own weight as this can cause damage. Support external piping separately. Caution 1. Preparation before piping Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips, cutting oil and other debris from inside the pipe. F.R.L. Units Precautions 2 Be sure to read this before handling. .1 After tightening by hand, use a tightening tool to tighten an additional 1/6 to 1/4 turn as a guideline. Recommended Tightening Torque Unit: N・m Torque Connection thread 1 to 1.5 .1 7 to 9 12 to 14 28 to 30 36 to 38 48 to 50 M5 1 2 22 to 24 28 to 30 40 to 42 48 to 50 1 8 1 4 3 8 1 2 3 4 1 1 4 1 1 2 40