Lutz-Jesco MAGDOS LA, Руководство по эксплуатации

Страница: 19 / 44

Hydraulic installations
Connecting a leakage drain
19
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170502
BA-10010-02-V01
Solenoid-diaphragm dosing pump
MAGDOS LA / LD
Operating instructions
8.4.2 Making the glue-in connection
a
b
Fig. 12: Glue-in connection
Perform the following working steps:
1.
Cut the PVC tube to length.
2.
Push the union nut (1) onto the tube.
3.
Stick the bonded coupling sleeve (2) to the tube (follow the
instructions of the adhesive manufacturer).
4.
Screw the union nut onto the valve of the dosing pump. Use a gasket
that is suitable for the dosing medium.
ü
Glue-in connection made.
8.4.3 Making the cemented connection
a
b
Fig. 13: Cemented connection
Perform the following working steps:
1.
Cut the tube to length.
2.
Cut the thread (2) onto the end of the tube.
3.
Push the union nut (1) onto the tube.
4.
Seal the thread. When choosing your sealing material, take into
account its resistance to material, temperature and pressure.
5.
Screw the union nut onto the valve of the dosing pump. Use a gasket
that is suitable for the dosing medium.
ü
Cemented connection made.
i Under normal conditions, you only need to screw the hydraulic
connections finger-tight. However, due to the material settling,
the pre-tension of the screw connection can slacken. This
means that you must re-tighten the screw connection before
carrying out commissioning.
8.5 Connecting a leakage drain
Lutz-Jesco GmbH dosing pumps are produced to the highest of quality
standards with a long service life. However, some parts are subject to
operational wear. This is the case particularly with the diaphragms that
are continuously subjected to forces during the suction and discharge
strokes and to the effects of the dosing medium.
If a diaphragm ruptures, the dosing medium starts to leak. This leakage is
drained via the leakage opening. On the flange of the dosing head, there
are three openings for this purpose. Depending on the alignment of the
dosing pump, the leakage is drained via the downward opening.
Fig. 14: Openings of the leakage drain
NOTE
Damage to drives due to effervescent media
If a hose is connected to the leakage drain and it is routed back into
the dosing tank, effervescent media can enter the drive and damage
it.
ð
Collect the leakage in a collecting pan.
ð
As an alternative, you can route the leakage back to to the dosing
tank using a funnel. You should install the funnel at an adequate
distance from the leakage opening.
8.6 Connecting the dosing head venting facility
MAGDOS LA / LD dosing heads have an integrated dosing head venting
facility (except for dosing heads made of stainless steel).
For the procedure when venting, refer to chapter 11.1.1 „Venting the
dosing pump“ on page 27.
Fig. 15: Dosing head venting facility with hose connection