Flowserve Machinery Components - Manual (Page 7)

General Installation and Maintenance Instructions for Machinery Components
7
Concentricity of the shaft to the seal chamber bore should be within
0,025 mm per 25 mm shaft diameter (.001" per 1" shaft diameter)
to a maximum of 0,125 mm (.005") TIR.
See figure 5.
6. Mechanical Seal Installation
Verify that the mechanical seal is in accordance with the order documents, to ensure that the
correct seal is being installed.
Take care that seal cartridge or components of the seal are handled and carried safely
during installation of mechanical seal and that the ergonomic principles are followed. In
order to prevent personal injuries the operator should also wear protective clothing as
per the plant’s safety regulations.
Correct seal setting is important for running a mechanical seal successfully.
Incorrect seal setting can lead to malfunction of the mechanical seal and consequent
leakage of sealed product into the environment.
Cartridge seals unitize the complete seal assembly on a sleeve such that the entire seal is instal-
led simultaneously. Component seals are assembled sequentially on the equipment and require
careful measurements to properly locate and lock the rotating components relative to the statio-
nary components. When measuring the setting or securing cartridge seals, always make sure
the shaft is in the same position as when the equipment is operating (e.g. including the effects
of thermal growth or contraction of the shaft relative to the casing).
To ease installation, gaskets may be lightly lubricated. Lubricant must be compatible with both
handled product and gasket material. Generally, silicon grease is suitable but this should be
verified before applying.
Caution: avoid over compressing a bellows. This could result in reduced spring force
and length.
Some mechanical seals are sensitive to direction of rotation. Verify that the direction of rotation
of the shaft corresponds to that of the mechanical seal before installation.
Precautions must be taken for parts of the mechanical seal that will be used as support
to step on during assembly operations. These parts must be protected against slipping,
stumbling or falling (for example by using a strut).
!
!
!
Figure 5