200 150 100 50 0 0 Charging pressure MPa 0.5 1.5 Insertion force N 1 1. Screw the fitting into the hexagonal face of the S coupler, applying the appropriate wrench as close to the thread as possible. Place the wrench as close as possible to the thread. Do not apply pliers and pipe wrench to any other part other than the wrench flats. This may cause breakage or leakage. 2. Tightening torque 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. Handling of Thread Type Caution Plug Insertion Force in Pressurized Condition Insertion Force of Series KK130 3. When a fitting is over tightened, more of the sealant material is squeezed out. Remove the squeezed out sealant material. 4. When tightening is not sufficient, it will cause sealing failure or a loose fitting. 5. Re-using 1) Normally, a fitting with sealant can be re-used 2 to 3 times. 2) Remove the sealant material that is separated and adhering to a removed fitting with air blow, etc. If the separated sealant enters into nearby equipment, it will cause air leakage or malfunction. 3) When the sealant is no longer effective, wrap pipe tape over the sealant material and re-use the fitting. Do not use a sealant material other than pipe tape. 6. In cases where positioning is required, turning the fitting in the reverse direction after tightening will cause air leakage. Connection thread size NPT, R, Rc1/8 NPT, R, Rc1/4 NPT, R, Rc3/8 NPT, R, Rc1/2 Proper tightening torque N・m 7 to 9 12 to 14 22 to 24 28 to 30 1. Prepare a hose band separately when using a barb fitting. If the hose band is not used, the hose may come off. 2. When using a nut fitting, insert the hose all the way to the end and securely tighten it with the nut. When the insertion of the hose or the tightening of the nut are not sufficient, the hose may come off. 3. Disconnection may occur depending on the material or the O.D. accuracy of the hose; therefore be sure to confirm the applicability of the hose. Handling of Barb Fittings and Nut Fittings Caution Series KK130 Specific Product Precautions 4 Be sure to read before handling. Refer to front matter 56 for Safety Instructions, pages 13 to 16 for Fittings and Tubing Precautions. 196