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

Page 18 Page 20
Page 19
Image 19
Multitech 1777.8/7-10 G3 operating instructions Removing a double-acting mechanical seal
Page 18 Page 20

1777.8/7-10 G3 specifications

The Multitech 1777.8/7-10 G3 is a prominent device designed for the evolving landscape of communication technology. This multi-functional solution becomes essential for businesses and organizations that demand flexibility and reliability in their network infrastructure.

One of the main features of the Multitech 1777.8/7-10 G3 is its support for multiple communication interfaces. This device can handle several protocols, enabling seamless connectivity regardless of the environment. The built-in support for both voice and data services makes it an attractive solution for various applications, from remote offices to industrial settings.

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Moreover, the integration of VoIP capabilities allows users to benefit from cost-effective voice communication solutions. This convergence of voice and data services streamlines operations and reduces overall costs while maintaining high-quality service.

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To summarize, the Multitech 1777.8/7-10 G3 is a testament to modern communication technologies, combining flexibility, security, and ease of use while equipping businesses with the tools necessary for efficient operations in a rapidly changing digital landscape.
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