Flowserve MSS - Manual (Page 3)

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Split Mechanical Seal MSS - Installation and maintenance instructions for machinery parts
1.4 Function
The faces of the seal ring and the mating ring are designed as sealing faces. The seal
faces of the seal rings are contacting and wearing slightly, when the machine shaft
rotates. The consumed quantity of product leakage is low and depends on the operat-
ing conditions, it enters the atmosphere through the seal gap.
!
The product pressure may not exceed the values given under item 1.1.
1.5 Function conditions
The MIXERPAC’s function is obtained only when the following conditions are fulfilled:
• Plane-lapped seal faces.
• Perpendicularity between the seal faces and the shaft centerline.
• Unforced clearance of the rotating parts within the specified tolerances.
• Prevention of sedimentation on the surfaces of the shaft or shaft sleeve by e. g.
crystalliation or polymerisation.
• Prevention of the product from adhering in the area at the seal gaps.
• Permanent fluid film in the seal gaps.
• Adherence to the specified operating data as per item 1.1 respectively the data
sheet.
If these function conditions are not fulfilled, the leakage rate increases and parts
of the product can escape into the atmosphere. Additionally, disregarding of these
issues can result in high component temperatures.
!
See the Directive 94/9/EC. EN 13463, Part 1 - 8.
2.0 Information on Safety
.1
DANGER: This symbol means, that failing to observe this information involves
the risk of personal injury and / or considerable damage to property.
!
IMPORTANT: This symbol draws your particular attention to important informa-
tion that is possibly not clear even to qualified personnel. This infor-
mation, however, must be observed to prevent malfunctions that in
turn could directly or indirectly give rise to serious injury and / or
property damage.
. The customer and / or the operator must ensure that all persons assigned to handle,
assemble or run the machine have carefully read these installation and maintenance
instructions, before they commence any installation and maintenance work at the
MSS or before operate the machine. These personnel must be fully acquainted with
the layout and function of the MSS and the respective support system.