|
|
|
| |
Home > Install&Used Usage Instruction
|
|
A key to the mechanical's stable, safe and reliable performance for long lies in its proper installation and use. If not installed or used in a proper way, that will result in its defective sealing performance, shorter life or seal failure. Here is a brief introduction to notes for installation and use for your information: |
¢ñ.Check: whether the dimensional accuracy, the geometric accuracy and interrelations of relevant parts in mounting the mechanical seal conform to requirements.
1. See the drawing below for the dimensional tolerance, surface roughness and chamfer transition shape of the mechanical seal's related shaft and stationary seat.
2. The shaft's radial runout shall be ¡Ü0.04mm and axial float ¡Ü0.3mm.
3. The verticality of the joint positioning end face between the seal chamber and the gland to the shaft's central line shall be ¡Ü0.04mm.
4. Check whether the axial and radial dimension of the assembling part between the seal chamber and the gland are accurate.
|
¢ò.Installation:
1. It's necessary to guarantee the assembling dimension as required.
2. During the whole installation process, it's necessary to keep the mechanical seal and the equipment's seal chamber clean and prohibit the seal from being hit or knocked lest its friction pair will be deformed and damaged to result in the seal failure.
3. A layer of clean lubrcating liquid can be applied on the seal part for smooth installation. It's recommended to use suds or estersil for EPR.
4. In installing the stationary ring gland, the stress must be even for screwing down the bolt to ensure that the stationary ring's end face is vertical to the end cover's central line; and if also shall be noted that the anti-rotating groove on the stationary ring's back shall aim to but not conflict with the antirotating pin.
5. In installing the seal related to the rotation direction (such as looped spring transmission and hook-spring transmission), it's necessary to note whether the spring's rotation direction is accurate, and the accurate direction shall be: the more the spring is screwed down, the tighter it will be.
6. In installing the rotary ring part, when the retaining ring, the impeller or the spring seat is relied on to fix with the shaft, it's necessary to guarantee the rotary ring part's working length, that is, the rotary ring can make flexible movements axially and be restored when compressed by hand after installation.
7. Turn the shaft by hand after installation to check whether there is a feeling to seizure; if so, it's necessary to check whether the installation is accurate. |
¢ó.Use:
1. Before normal starting, it's necessary to carry out a static pressure test to check the sealing effect to the mechanical seal's end face, gasket ring part and seal end cover part. Check and troubleshoot problems one by one if any.
2. Before normal use, it's necessary to carry out normal-pressure and mormal-temperature operation and running-in for a while so that end faces are jointed more uniformly; and then operate and use it in normal working conditions.
3. In working, the seal chamber shall be filled with the lipuid or the sealed medium. Keep the end face lubricated to avoid exhausting and dry fricton.
4. When the working medium is overtemperature, undertemperature, vulnerable to crystallization, impure, granular, inflammable, explosive or toxic, it's necessary to take corresponding actions like rinsing, cooling, filtering and seal blockage in accordance with the pipeline systems in JB/T6629 or API610 to ensure the mechanical seal's normal operation.
|
|
|
|
|
