PISCO VG Series, Руководство пользователя, Страница: 16 / 21

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38
Caution
1. Remove dusts or drain before piping. They may get into the peripheral
machine / facilities and cause malfunction.
2. When inserting an ultra-soft tube into push-in fitting, make sure to place
an Insert Ring into the tube edge. There is a risk of causing the escape of
tube and a fluid leakage without using an Insert Ring.
3. The product incorporating NBR as seal rubber material has a risk of
malfunction caused by ozone crack. Ozone exists in high concentrations
in static elimination air, clean-room, and near the high-voltage motors,
etc. As a countermeasure, material change from NBR to HNBR or FKM is
necessary. Consult with PISCO for more information.
4. Special option “Oil-free” products may cause a very small amount of a fluid
leakage. When a fluid medium is liquid or the products are required to be
used in harsh environments, contact us for further information.
5. In case of using non-PISCO brand tubes, make sure the tolerance of the
outer tube diameter is within the limits of Table 1.
●Table 1. Tube O.D. Tolerance
mm size Nylon tube Polyurethane tube inch size Nylon tube Polyurethane tube
ø
1.8mm
─ ±
0.05mm
ø
1/8
±
0.1mm
±
0.15mm
ø
3mm
─ ±
0.15mm
ø
5/32
±
0.1mm
±
0.15mm
ø
4mm
±
0.1mm
±
0.15mm
ø
3/16
±
0.1mm
±
0.15mm
ø
6mm
±
0.1mm
±
0.15mm
ø
1/4
±
0.1mm
±
0.15mm
ø
8mm
±
0.1mm
±
0.15mm
ø
5/16
±
0.1mm
±
0.15mm
ø
10mm
±
0.1mm
±
0.15mm
ø
3/8
±
0.1mm
±
0.15mm
ø
12mm
±
0.1mm
±
0.15mm
ø
1/2
±
0.1mm
±
0.15mm
ø
16mm
±
0.1mm
±
0.15mm
ø
5/8
±
0.1mm
±
0.15mm
6. Instructions for Tube Insertion
① Make sure that the cut end surface of the tube is at right angle without
a scratch on the surface and deformations.
② When inserting a tube, the tube needs to be inserted fully into the push-
in fitting until the tubing edge touches the tube end of the fitting as
shown in the figure below. Otherwise, there is a risk of leakage.
Tube end
Sealing
Tube is not fully inserted up to tube end.
③ After inserting the tube, make sure it is inserted properly and not to be
disconnected by pulling it moderately.
※. When inserting tubes, Lock-claws may be hardly visible in the hole, observed
from the front face of the release-ring. But it does not mean the tube will
surely escape. Major causes of the tube escape are the followings;
①Shear drop of the lock-claws edge
②The problem of tube diameter (usually small)
Therefore, follow the above instructions from ① to ③, even lock-claws
is hardly visible.