Document No.ZL-OM01001
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Piping to the Vacuum (V) Port
(1) Allow a sufficient margin of tube length when piping, in order to prevent twisting, tensile,
moment loads, vibration or impact being applied to the tubes and fittings. This can cause
damage to the tube fittings and crushing, bursting or disconnection of tubing.
(2) Piping to the product is assumed to be static piping. If the tube moves, it may become worn,
elongated or torn due to tensile forces, or disconnected from the fitting. Ensure the tube is in a
static condition at all times before using.
(3) Prevent the connected tube from being rotated. If the fittings are used in this way, the fitting
may fail.
(4) Do not lift the product by holding the piping after the tube is connected to the vacuum (V) port.
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One-touch Fittings Precautions
1. Insertion of tube
1) Cut the tube perpendicularly, being careful not to damage the external surface. Use SMC’s
tube cutter TK-1, 2 or 3 for cutting. Do not cut the tube with pliers, nippers, scissors, etc. If the
tube is cut by any tools other than a tube cutter, the cut surface of the tube will be slanted or flat,
making it impossible to be connected securely, or causing the tube to come off or air leakage
after the tube is connected. Also, allow a sufficient margin of tube length.
2) Hold the tube and push it in slowly, inserting it securely all the way into the fitting.
3) After inserting the tubing, pull on it gently to confirm that it will not come out. If it is not installed
securely all the way into the fitting, problems such as leakage or disconnection of the tube can
occur.
2. Removal of the tube
1) KQ2 series is used for the vacuum (V) port. For this series, the tube can be removed by
pushing one part of the release button.
2) Hold down the release button while pulling out the tube. If the release button is not held down
fully, there will be more bite so it will be more difficult to pull out the tube.
3) If the removed tubing is to be used again, cut off the section of the tubing which has been
gripped. Using the gripped portion of the tube as it is can cause problems such as air leakage or
difficulty in removing the tube.
Precautions for Use of Other Manufacturers' Tubes
If tubes of brands other than SMC are used, confirm that the materials and tolerance of the
tubing outside diameter will satisfy the following specifications.
1) Nylon tube
/-0.1mm
2) Soft nylon tube
/-0.1mm
3) Polyurethane tube /-0.15mm and -0.2mm
Do not use tubing which does not meet these outside diameter tolerances. Connection to the
fitting may fail, causing disconnection of the tube and air leakage.
