Multitech 1777.8/7-10 G3 operating instructions Removing a double-acting mechanical seal

Page 19
19

 

Multitec

 

 

7.3.5.2 Removing an air-cooled mechanical seal

7.3.5.3 Removing a water-cooled mechanical seal (seal

(seal code 64)

code 64)

Fig. 33

N.B.: This mechanical seal design is used for application

Fig. 35

temperatures from 140 to 200￿C and Multitec sizes 32 to 100.

The pump shall only be coupled to a motor with enclosure IP 55.

Note: This mechanical seal design is used for temperatures

- Remove the bearing as described in sections 7.3.3.1 and

 

7.3.3.2.

 

from 140 to 200￿C and sizes 125 and 150 (optional for sizes

-

Remove O-ring 412.10.

32 to 100).

- Pull off spacer sleeve 525.1.

 

 

-

Loosen bolts 901.11.

-

Drain the pump and remove the circulation line at the

- Remove bearing housing 350.1.

 

pipe union 731.15.

- Remove mechanical seal cover 471.1 with the seat ring and

 

-

Remove the rolling element bearing as described in sec-

 

gasket 400.1.

 

 

tions 7.3.3.1 and 7.3.3.2.

-

Remove key 940.5.

 

-

Remove O-ring 412.10.

- Pull off sleeve 523.1 with the rotating assembly of

-

Pull off spacer sleeve 525.1.

 

mechanical seal 433.7. (Two holes are provided in the

 

-

Undo nuts 920.3.

 

sleeve for engaging a puller.)

 

-

Remove bearing housing 350.1.

- Take off seal housing 441.4.

-

Remove O-ring 412.4.

-

Remove mechanical seal cover 471.1 with the seat ring

On between-bearings pumps (pump version C or D) the

 

and gasket 400.1.

mechanical seal shall be removed as follows:

-

Remove key 940.5.

- Remove screws 900.2 and hood 683.1.

-

Pull off sleeve 523.1 with the rotating assembly of mech-

- Undo axis 87-5 with fan impeller 831.1.

 

anical seal 433.7. (Two holes are provided in the sleeve

- The threaded insert 915 must remain in the shaft 210.

 

for engaging a puller.)

 

Caution

On previous versions (prior to 03/2002) and if

-

Remove cooling jacket 66-2.

 

 

assembled in the factory, the fan shaft 87-5 was

-

Take off seal housing 441.4.

fitted using

Loctite 222.

-

Remove O-ring 412.4.

 

Caution

On previous versions and when re-assembling,

 

 

 

 

secure fan shaft 87-5 and fan impeller 831.1 with

7.3.5.4 Removing a double-acting mechanical seal

Loctite 222.

 

-

Remove support 59-7.

Mechanical seals in tandem and back-to-back arrangement are

- Remove the bearing as described in section 7.3.3.1 as well

fitted as per customer specifications. There is a wide variety of

 

as spacer sleeve 525.1 and bearing housing 350.1.

variants, types and brands. Please refer to the general

Remove the mechanical seal as described above.

assembly drawing and the documentation supplied with the

pump for orientation.

Fig. 34

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Contents Operating instructions 1777.8/7-10 G3 High-pressure pumps in ring-section designWorks No Type series Multitec Contents Multitec Index Section Adjusting dimensions for couplingMultitec General SafetyTransport, storage MultitecDescription Product AccessoriesClose-coupled pumps Multitec Installation at siteFoundation / Checks to be carried out prior to installation Installing the pump/unit100 120 Nm Aligning the pump / drive Coupling guardBe tightened to the following torques Tightening torque Thread Strength Drive Non-drive EndProtection against foreign matter Connecting the pipingMax. permissible pipeline forces material codes 10, 11, 12 Max. permissible pipeline forces material codes 20 toChecking the direction of rotation Connection to power supplySetting the time relay Vacuum balance lineMultitec Commissioning, start-up / Shutdown Gland packing Temperature of the fluid pumpedStart-up ShutdownDensity of fluid pumped Switching frequencyReturning to service after storage Minimum flowsPump Multitec Servicing / maintenanceBearings and lubrication General instructionsCoupling Oil quality / Oil changeMotor Shaft seal Mechanical sealRadial suction nozzle Dismantling the bearingsDismantling the non-drive-end bearings Plain bearing Axial suction nozzleGrease lubrication Grease lubrication figsOil lubrication with lip seal fig Oil lubrication with labyrinth seal figReplacing the shaft protecting sleeve Removing a double-acting mechanical seal With the rules of sound engineering practice ReassemblyDismantling the hydraulic system Intermediate bearing bush Intermediate bearing diffuserStuffing box housing Reassembly of hydraulic systemSeals Gland packing Leakage at the mechanical seal Mechanical sealsHorizontal baseplate-mounted pump units Sealing elementsTightening the shaft nuts on Multitec pumps MTC 100/125/150 Fixed bearingRolling element bearing sizes Grease-lubricated bearings Radial bearing Temperature of the rolling element bearingsRe-adjusting the clearance gaps Maximum clearance gaps Installation and returning to serviceMultitec Trouble-shooting Pump sizes 32 to General assembly drawingPump sizes 100, 125 Close-coupled pump up to pump sizeRadial suction nozzle Vertical design Pump sizes 32, 50Pump sizes 125 529 List of componentsDescription 525.1/2/4 Spacer sleeveBild Achtung AttenzionKSB Aktiengesellschaft

1777.8/7-10 G3 specifications

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