Dry Gas Seals Installation Method

Dry Gas Seals Installation Method

Date:Oct 20, 2017

Dry Gas Seals installation method

Installation method of pump mechanical seal

Mechanical seal is one of the most effective ways to turn the mechanical body seal, and its processing accuracy is relatively high, especially the dynamic and static ring, if the disassembly method is not appropriate or improper use, the mechanical seal after assembly not only failed to seal Purpose, and will damage the assembled sealing element.

1. Precautions when mechanical seal is removed

In the removal of mechanical seals, it is strictly prohibited to use hand hammer and flat shovel, so as not to damage the sealing element.

If there is a mechanical seal at both ends of the pump, care must be taken during the disassembly to prevent this loss.

For mechanical seals, if the gland is loose, the seal surface should be moved, and the static and dynamic ring parts should be replaced and should not be re-tightened. Because in the loose, the friction of the original operation of the trajectory will change, the contact surface of the seal is very easy to be destroyed.

If the sealing element is bound by dirt or agglomerates, the condensate should be removed and the mechanical seal removed.

2. Mechanical seal installation Note:

(1). Install the left part; mounted on the sealing plate

(2). Then install the right side of the dynamic ring, moving ring with the static ring sealing surface to be clean

(3). Re-install the key and the impeller. Good gasket and nut

Before installation, carefully check the assembly of the number of parts is sufficient, the components are damaged, especially the dynamic and static ring for bruises, cracks and deformation defects. If there is a problem, repair or replace the new spare parts.

Check that the chamfering of the sleeve or gland is appropriate and that it must be trimmed if it does not meet the requirements.

The mechanical seals of the components and their associated assembly surfaces must be cleaned with acetone or anhydrous alcohol before installation. The installation process should be kept clean, especially moving, static ring and auxiliary sealing elements should be no impurities, dust. Moving, static ring surface coated with a layer of clean oil or turbine oil.

The upper cover should be made after the coupling is correct. Bolts should be tightened evenly to prevent the gland section skew, with a stopper or special tools to check the points, the error is not greater than 0.05 mm.

Check the gland with the shaft or the outer diameter of the sleeve with the gap (and concentricity), must ensure that even around, with the feeler check the tolerance of not more than 0.10 mm.

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