Mounting 1. When performing the piping work, turn the tightening tool in the horizontal direction to the hex. across flats of the stud so that any moment is not applied to the body. If the tool is in contact with the body, this may cause the stud to come off. 2. The union elbow, union fee, union “Y” , different diameter tee and different diameter union “Y”should be fixed through the mounting hole. Otherwise, air leakage or breaking can occur due to a pulling force or moment load created by the product's weight. 3. The elbow union, branch tee, and long elbow union can be turned for positioning after connecting, but they cannot be used while turning them. Doing so may cause worn out metallic particles to enter the fluid or the fitting to break. 4. If the connection tube oscillates or turns, do not use this product. Doing so may cause the fitting to break. In particular, for the product with the stud, this may cause the stud to come off. Proper Tightening Torque of Fittings 1. Tighten fittings with sealant using the proper tightening torques in the table below. As a rule, they should be tightened 2 to 3 turns with a tool after first tightening by hand. If tightened using a torque exceeding the proper torque level, this may cause the fitting to break. In particular, for the product with the stud, the stud may come off. Installation and Removal of Tubing Connection thread size G1/8 G1/4 G3/8 G1/2 Proper tightening torque N.m 2.9 to 3.2 5.7 to 6.3 9.5 to 10.5 14.3 to 15.8 Carefully perform the piping work so that the tool is not in contact with the body. Stud Body G thread Proper tightening torque Connection thread size NPT, R1/8 NPT, R1/4 NPT, R3/8 NPT, R1/2 Proper tightening torque N.m 7 to 9 12 to 14 22 to 24 28 to 30 R thread/NPT thread Proper tightening torque Selection 1. The surge pressure must be under the maximum operating pressure. If the surge pressure exceeds the maximum operating pressure, it will result in damage to fittings and tubing or the tubing may result in being fallen out. 2. If using a fluororesin tubing in an environment where the fluid temperature changes drastically, it is recommended to use an inner sleeve. Otherwise, air leakage may occur or the tube may release from fitting due to deformation of the tubing. 3. The particle generation of the KQB2 series depends on the operating conditions and operating environment. If you are concerned about the effects on machinery and equipment, check the particle generation with your machine before use. The components of the KQB2 series may slide due to changes in the internal pressure, which may generate particles. When using male elbow, male branch tee, and extended male elbow fittings, particles may be generated by rotation for positioning after connecting. Series KQB2 Specific Product Precautions Be sure to read before handling. Refer to front matter 56 for Safety Instructions, pages 13 to 16 for Fittings and Tubing Precautions. Caution 1. Installation of tubing 1) Grease is not used for the KQB2 series, therefore a greater insertion force is required when the tube is installed. In particular, polyurethane tubing may fold when inserted due to its softness. Hold the end of the tubing, and insert it all the way in slowly and securely. Refer to dimension “M” in the dimension drawings for guidance on the insertion depth of tubing. 2. Removal of tubing 1) For tubing used at a high temperature or for an extended period of time, there is a possibility that it will not fit into a One-touch fitting again due to an enlarged O.D. Dispose of the tubing and replace it with a new one. Caution Caution Caution 113 KQ2 KQB2 KS KX KM KF M H/DL L/LL KC KK KK130 DM KDM KB KR KA KQG2 KG KFG2 MS KKA KP LQ MQR T