First, in order to make Mechanical seals Has good sealing performance, the installation of the sealing equipment shall meet the following requirements:

1 installation of mechanical seal parts of the shaft (or sleeve) diameter is less than 50mm, the radial runout is less than or equal to 0.04mm; diameter greater than 50mm less than 0.06mm.

2 installation of mechanical seal parts of the shaft (or sleeve) od tolerance is H6, the surface roughness Ra value is not greater than 3.2um.

3 installation must be shaft sealing cavity (Beng Gai), the mechanical seal itself clean, prevent the impurities from entering the sealing installation position.

The equipment of rotor axial runout < 0.3mm 4 installation of mechanical seals.

Two, installation

Mechanical seals The installation is carried out in the process of pump assembly. When the pump shaft is arranged on the bearing box sealing element bearing box installed, follow the steps to install mechanical seals:

1 before installation, should confirm the product types and specifications and equipment requirements.

2 in the installation of the sealing cavity and shaft gland and auxiliary seal ring contact uniform oiling (Note: the ethylene propylene rubber, or the media are not allowed into the lubrication condition, apply vegetable oil or soap water.

3 overvoltage cover through hole, the diagonal cross screw, bolt the entire seal and seal cavity (cover) connecting screw.

4 mechanical seals are equipped with auxiliary system, marked by the pipeline connecting the right.

5 sets of mechanical seal on the shaft, according to the design of the working height of the installed in place.

Three, test

1 after the above steps, manual turning, observe the torque change, and there is no rubbing sound abnormal, to determine whether to re install and adjust.

2 open the valve, the sealing cavity communicated with the sealing medium, exhaust all the seal cavity of the air, so that the sealing cavity full of medium, and observe the seal without leakage.

3 confirm the above two correct test run.

Four, operation notice

1 equipment operation should observe the control instrument is normal, there is no abnormal sound equipment and overheating phenomenon.

2 in the experimental work, should pay attention to changes in vibration and sound equipment. Due to the difference of thermal expansion between shaft and casing, machine vibration may occur, in this case, can cause seal failure. You should stop and adjust to pipelines, and strong coupling, anchor screws and other parts to be again.

3 pay attention to run at the beginning of leakage of the seal, under normal circumstances, the initial leak may be too large, but after a period of running, leakage will reduce or even close to zero.