CKD MN4KB2 Series Instruction Manual page 18

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INSTALLATION
(4) When selecting from tubes commercially available, carefully study the accu-
racy of the outside diameter as well as the wall thickness and the hardness.
The hardness of an urethane tube should be 93°C or more (as measured by
a rubber hardness meter).
With a tube that does not have a sufficient accuracy of the outside diameter
or the specified hardness, a decrease in the chucking force may cause dis-
connection or difficulty in inserting.
Tube dimensions
Outside diameter
mm
φ4
φ6
φ8
φ10
(5) Minimum bending radius of tubes
Observe the minimum bending radius of tubes. Neglecting the minimum
bending radius may cause disconnection or leaks.
Tube bore
φ4
φ6
φ8
φ10
(6) Cutting a tube
To cut a tube, use a tube cutter to cut the tube perpendicularly to the length
of the tube. Inserting an obliquely cut end of a tube may cause air leakage.
(7) Tube connections
Do not bend a tube immediately at where it is connected to the joint but lead
it out straight from the end of the joint for a length equal to or greater than
the outside diameter of the tube. The tension applied sideways through the
tube should not exceed 40N.
(8) Blank plug to be used
For use with a solenoid valve with a one-touch joint, select the blank plug
specified by us:
[SM-213928-A/2]
Inside diameter mm
Nylon Urethane
φ2.5 φ2
φ4 φ4
φ5.7 φ5
φ7.2 φ6.5
Minimum bending radius mm
Nylon Urethane
10 10
20 20
30 30
40 40
Blank plug GWP□-B Series
―17―
Outside diameter allowance
Soft or hard nylon
Urethane φ4, φ6
Urethane φ8, φ10
±0.1mm
+0.1mm
-0.15mm
+0.1mm
-0.2mm