Maier novasys DP Series, Руководство по эксплуатации

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Repair Instructions
Series DP DN 10 – 50 ( ⅜
″
- 2
″ )
Repair
Repair is required during preventive maintenance or when leaks are
detected at housing holes (G).
Dismantling the unit

Remove locking ring 25.

Remove rotor 6-15 with deep groove ball bearings 23 from housing 1-2. If
necessary, use disassembly bolt and puller for ball bearings.

Remove counter ring 19 and O- ring 21 from rotor.

If bearings 23 are defective: extract left bearing 23 from rotor. Then
remove locking ring 24 and extract second bearing 23.

Depending on version, remove O-ring 22 or shaft sealing ring 31 from
housing.

Remove mechanical seal 18 is not rotating from housing.

Remove spring 20 from housing.

Remove O ring 21 from housing.
Evaluating the parts

The quality of the sealing surfaces of counter ring 19 and mechanical
seal 18 is of particular importance. Sealing surfaces are lapped.
Therefore, these parts always need to be replaced.

For safety reasons, replace O- rings 21.

Shaft sealing ring 31 or O- ring 22 - if applicable - must be replaced.

Replace or relubricate deep groove ball bearing 23.
Reassembling the unit

ATTENTION: All sealing parts must be dry when mounted. Never
use grease or oil. Make sure hands and tools are free from grease
and clean.

Mount deep groove ball bearing 23, locking ring 24, second deep groove
ball bearing 23 to rotor 6-15.

Mount O- ring 21 and counter ring 19 in rotor. Make sure not to scratch
the sealing surfaces.
The counter ring has a bead that fits into the bead of the rotor.

Mount O- ring 21 in housing groove.

Mount spring 20 in housing (make sure not to damage the O-ring).

Press down spring with bolt. Fixate this position with a screw driver
(see fig. 1). Now mount the mechanical seal.
.
R-dp_en.doc Rel.16.02.2011
1 Housing G 20 Pressure spring
2 Housing N * 21 O ring
6 Rotor RG 22 O ring
7 Rotor LG * 23 Ball bearing
8 Rotor RN 24 Locking ring
9 Rotor LN 25 Locking ring
14 Rotor K 26 Screw plug
15 Rotor K * 28 CU seal
* 18E Mech. seal E 30 grease nipple
* 18C Mech. seal C * 31 Shaft seal
* 19W Counter ring W
* 19C Counter ring C
* = wearing part
Attention :
For
thermal oil
, you MUST use parts 18E, 19W. O-rings 21
and shaft seal 31 must be made of Viton. Please specify
when ordering. Order bearing 23 version for thermal oil.

Press mechanical seal 18 into the housing (manually).
The two beads must engage in the housing. Tilting
must not be possible.

Place O- ring 22 into the housing. Versions with shaft
sealing ring 31: apply some ball bearing grease to the
interior of the shaft sealing ring.

Press rotor 6-15 with bearings and counter ring 19 into
housing.

Mount locking ring 25.

Remove screw driver used to hold the spring in
position. Check to make sure the spring is straight.
Spare parts
It is recommended to stock the wearing parts mentioned
above. Always specify the part number and the complete
type designation of the rotary joint as per type
designation plate when ordering spare parts.
- We reserve the right to technical modifications -
Fig. 1: Locking the spring by means of a screwdriver
for mounting the mechanical seal.
Christian Maier GmbH & Co • Maschinenfabrik • Heidenheim
Würzburger Str. 67-69 • D-89520-Heidenheim / P.O.Box 16 09 • D-89506 Heidenheim
Tel. +49-7321-317-0 • Fax +49-7321-317-139 • e-mail: vdk@maier-heidenheim.de