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The Installation Of The Stirrer Seal
Jun 08, 2017


The main indicators to measure the performance of the agitator seal are leak rate, life and use conditions (pressure p, line speed v, temperature t).

When a fluid leak occurs, the "agitator seal" is often used to compare or evaluate the effectiveness of the agitator seal. The degree of sealing of the agitator is indicated by the leakage rate of the fluid sealed by the agitator in the unit time by the volume or mass of the sealing surface of the agitator (also in consideration of the perimeter or diameter of the unit agitator). Therefore, the leakage is often zero, called "zero leakage". Agitator Seals Although the theoretical static stirrer seal may be zero leakage, in fact, to do zero leakage is not only technically particularly difficult, but also for economic considerations, but for very expensive, toxic, corrosive or flammable and explosive fluid required The amount of leakage to a minimum. In fact, the amount of leakage is "zero" is only relative to some kind of measurement leakage equipment can distinguish the minimum leakage, that is difficult to detect a very small amount of leakage. Therefore, the consistency of the agitator is a relative concept to ensure that the equipment does not leak should refer to the agitator seal device can effectively meet the design or production allowed (required) leakage rate, Agitator Seals known as the "allow leakage rate." Allow leakage rate should be determined according to specific circumstances, there is no uniform provisions.

In the chemical plant, there are still a large number of listen alone, can not find the volatile organic compounds from the joints at the "escape." Because of the small amount of leakage, the volume concentration (volume fraction) of the evolved gas is usually measured in parts per million using a sensitive gas leak detector, such as an organic vapor analyzer. With the large scale of modern industrial installations and the more stringent environmental protection requirements of countries or regions, Agitator Seals some industrialized countries have put forward the new concept of "zero escape" by referring to the issue of "escape".

We should pay attention to three items when installing the agitator seal:

1. Do not damage the sealing surface or sealing line of the stirrer sealing surface

The sealing performance of the flat agitator seal depends on the upper and lower end faces; the sealing performance of the hydraulic stirrer seal depends on the lip line associated with the hole or shaft, both of which are both soft and rich resilient, resistant to corrosion, Aging graphite, rubber, fiber, Agitator Seals which is vulnerable to damage caused by the special materials, and thus need to carry, install, custody process to give special protection and care, once the damage will often leave a lot of hidden parts of the hidden dangers;

2. Can not be forced to install

Some agitator seal is placed in the groove of the stuffing box, then need to be tightly installed, the construction can not be rough, brutal, very strong forced loading is bound to destroy the original prefabricated structure, which is like prefabricated concrete After the break into the required parts will lead to the same disaster. The installation of such a stirrer must be very careful, careful, Agitator Seals embedded must be carried out step by step;

3. Installation should pay attention to balance, symmetry

Place the stirrer in a position that is tightly attached to the effective sealing surface (or lip line). After the system is opened, it is necessary to do further observation and recoil the work of the tightening agitator seal to prevent the micro-leakage caused by the change of the working condition (such as pressurization) during the working process of the system.

The stirrer seal should be kept in good condition when not in use

1. anti-aging dark, moisture, flat placed away from cold and heat sources;

2. Do not press to keep the agitator seal naturally loose state, do not apply external force to change its physical shape;

3. Classification (the same shape, different materials, Agitator Seals the use of parts, applicable standards, purchase date, etc.)