SMC Networks ZK2 A Series - Limitations of Use and Exhaust Considerations

-74-
No. ZK2-OM01301
12. Limitations of Use
■Exhaust from Ejector
The exhaust resistance should be as small as possible to obtain the full ejector performance. There should
be no shield around the exhaust slit for silencer exhaust type. When the product is installed, one of the ports
should be open to atmosphere.
For port exhaust type, back pressure may increase depending on the piping size and length. Ensure that the
back pressure does not exceed 0.005 MPa (5 kPa). For the nozzle products with a nozzle diameter for a large
amount of exhaust air (air consumption + suction flow), such as ø1.5(ZK[ ] 15), precaution should be taken on
vacuum pressure decrease. Figure A below shows the relation between the exhaust piping (piping diameter
and length) and vacuum pressure When connecting pipes on port exhaust types with an outer diameter of Ø8
or more, connect them so that the joints do not interfere with each other (Fig. B).
Exhaust slit
(On both sides)
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0 1000 2000 3000 4000 5000 6000
真空圧力［
kPa］
配管長さ［mm］
［測定条件】
・供給圧0.4MPa
・真空ポート全閉
・排気側配管の先端は開放
注）実測値であり保証
値ではありませんので
ご了承願います。
TU0805
T0806
TU1065
T1075
Note) The values are
measured values. Not
guaranteed values.
[Measuring conditions]
- Supply pressure 0.4 MPa
- Vacuum port is fully closed
Piping length [mm]
Fig. A. Vacuum pressure for piping (ZK2□15)
Vacuum pressure [kPa]
Fig. B Example of piping
Nipple
（KQ2N08-99）
Tube
（TU0805 or T0806）
Straight type of
different diameter
（KQ2H08-10A）
Tube
（TU1065 or T1075）