Multitec

Mechanical seals

Caution

Mechanical seals are precision components. The

 

seat ring and the spring-loaded ring must always

be replaced together, i.e. always replace the entire mechanical seal.

To ensure trouble-free operation of the mechanical seal, the seal faces and the tools must be absolutely clean. Mechanical seals must be installed with utmost care.

The contact faces shall only be cleaned immediately before assembly takes place. They must not be greasy (grease, smudges ...) or damaged.

Individual seal components such as O-rings made of EPDM must never come into contact with oil or grease.

Mechanical seal reassembly is effected in reverse order to dismantling.

When mounting the spring-loaded ring, we recommend to wet the shaft protecting sleeve with clean fluid handled.

The seat ring and the spring-loaded ring shall always be mounted by hand resp. fingers, making sure that pressure is applied evenly, without tilting.

Horizontal baseplate-mounted pump units

Caution

On pump versions C and D, the correct direction

 

of rotation must be observed for mechanical

seals with uni-directional springs.

Left--hand spring

 

Right--hand spring

 

Shaft

 

Shaft

 

rotation:

 

 

 

rotation:

 

anti-clock-

View

 

clockwise

 

wise

towards

 

 

the spring- loaded ring

Fig. 39

Sealing elements

Caution Sealing elements made of EPDM must never

come into contact with oil or grease.

Defective O-rings (which have sustained mechanical damage such as cuts, cracks and deformation as well as changes in properties from deposits or embrittlement) must be replaced. Gaskets shall always be replaced by new ones.

If possible, the gasket shall be mounted without the use of mounting aids like grease or adhesives, unless authorized mounting aids are used.

22

7.4.3.1 Leakage at the mechanical seal

-Check axial alignment of the seal.

-Inspect gasket 400.1.

-Remove seal cover 471.1 (471.2 for bellows-type seals) and check position of seat ring in the seal cover.

-Check the O-ring on sleeve 523.1.

-Check O-ring 412.4.

7.4.4Bearings

Plain bearing

in installation types A - B - E / Ex - F / Fx - V / Vx are re-installed in reverse order to dismantling.

Rolling element bearings

The rolling element bearings are generally mounted on the bearing sleeve and tightened with shaft nut 920.2 / 920.6 / 920.7.

They are re-installed in reverse order to dismantling. The position of the keywayed nuts 920.6 (contact surface = plane surface with recess) marked during dismantling (7.3.3.2) must be complied with.

Check the concentricity and face run-out of ring 500.1 with a dial gauge for variants with oil lubrications.

Page 22
Image 22
Multitech 1777.8/7-10 G3 operating instructions Mechanical seals, Horizontal baseplate-mounted pump units, Sealing elements

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.

In terms of technologies, the device stands out with its advanced modular design. Users can easily customize the device with different interface cards based on their specific communication needs. This adaptability ensures that organizations can scale their operations without needing to invest in entirely new hardware as their requirements change.

The Multitech 1777.8/7-10 G3 also emphasizes high security and reliability. It implements multiple security features, including encryption and authentication processes, safeguarding sensitive data transmission. These features are particularly important for organizations that must comply with strict regulatory requirements.

Another characteristic of the Multitech 1777.8/7-10 G3 is its robust performance under various operating conditions. The device is engineered for durability and can withstand significant environmental stresses, making it ideal for deployment in less than optimal locations.

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.

The user-friendly interface of the Multitech 1777.8/7-10 G3 ensures that system administrators can easily configure and manage the device. comprehensive monitoring and reporting functions enable businesses to keep track of their network performance, ensuring that they can address any potential issues proactively.

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.