Installation
Instructions
BGM Dura Seal
The Flowserve BGM
the same time, it keeps contamination out of the bearing frame. The BGM
of two major components: a stator assembly and a rotor assembly. The seals work in
conjunction with a "bull's-eye" sight gauge to completely isolate the bearing frame from
harmful contamination.
Temperature changes in the bearing housing will result in pressure fluctuations. Conventional
"constant level" oilers are not recommended. They are intolerant of such small pressure
changes.
Dura Seal
is designed to keep bearing lubricant in the bearing frame. At
Dura Seal
consists
Atmospheric Sealing of Bearing Frame
To isolate the bearing frame from environmental conditions such as high humidity, steam or
condensation, the following steps must be taken before seal assembly.
1. Remove bearing housing vents. They are a path for contamination.
2. Plug each vent.
Stator Installation Figure 1
3. Remove the "constant level" oiler
and replace it with a "bulls eye"
sight gauge. See Figure 1.
A minimum 3/8" - 18 NPT tapped
hole must be provided to
accommodate the sight gauge.
4. When applying on equipment
using oil mist lubrication, provisions
must be made to allow oil mist flow
through the bearing housing.
Experience In Motion
Plug Vent
BGM
Dura Seal
Remove
"Constant Level"
"Bulls Eye"
Sight Gauge
Oiler
Stator Assembly Installation
The stator assembly, consisting of the stator and the stator mounting ring, can be installed
using either an arbor press or the appropriate BGM installation tool.
1. Remove the oil seals or other bearing protection devices.
2. Break the sharp edges of the housing bores using a file, emery cloth, etc. 0.005" R
minimum to 0.030 R maximum)
3. Apply a light film of silicon lubricant to the outer diameter of the stator mounting
O-ring.
4. Install the stator assembly in the housing bore. If you are using an arbor press, use a
protective shield such as cardboard, rubber, etc. protect the entire stator sealing
surface. If you are using the BGM installation tool, tap the outer end of the tool with a
hammer until the stator enters the housing bore, Figure 2. Protective shields are not
necessary when using the installation tool.
5. Do not press the stator flange hard against the bearing housing. Leave about a
0.020" gap between that stator flange and the housing. Use this gap for final FIM
(Full Indicator Movement) adjustments, if needed.
6. The stator must be square to the shaft within 0.005" FIM for proper seal perfor-
mance. If you are using the BGM Installation tool, the stator will be automatically set
within 0.005" FIM and no further adjustments are needed. If you are using an arbor
press, mount a dial indicator on the shaft and set the indicator on the stator face.
Rotate the shaft and read the dial indicator. Adjust the stator so the difference between
the maximum and minimum readings is less than 0.005".
Stator Installation Figure 2
Stator
Installation
Tool
Hammer
Shaft
2
Rotor Assembly Installation
1. Lightly lubricate the rotor O-ring inside diameter with the silicone grease provided with
the BGM
2. Break the sharp edges of shaft keyways or grooves using a file, emery cloth, etc., to
protect the O-ring from being cut or nicked.
3. Use silicone grease to lightly lubricate the shaft that the BGM rotor has to slide over.
Dura Seal
Housing
Bore
±0.001
or
+0.000"
-0.002"
.
To first obstruction
Face of seal housing to be square
to the axis of the shaft
to within 0.005" (0.13mm) FIM
Rotor
Rotor O-Ring
Shaft or sleeve OD
+0.001" (+0.03mm)
-0.002" ( -0.05mm)
Stator
Stator O-Ring
Bearings must be in good condition
•
Maximum lateral or axial movement of shaft (end play) 0.015" FIM
•
Housing bore to be concentric with shaft 0.003" FIM
•
Maximum dynamic shaft deflection at face of housing 0.002" FIM
•
4. Gently slide the rotor along the shaft so that the rotor face seats against the stator face.
Make certain the silicone lubricant does not get on the seal face.
5. Use light finger pressure to ensure the seal faces are making contact.
6. Hold the shaft stationary and rotate the rotor a minimum of one revolution to evenly spread
out the silicone grease.
3
TO REORDER REFER TO
B/M #
.
F.O
USA and Canada
Flowserve Corporation
Kalamazoo, Michigan USA
Telephone: 1 269 381 2650
Telefax: 1 269 382 8726
FIS170 REV 10-05 Printed in USA
To find your local Flowserve representative
and find out more about Flowserve Corporation,
visit www.flowserve.com
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly
selected, this Flowserve product is designed to perform its intended function safely during its useful life. However, the
purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications
under a wide variety of industrial service conditions. Although Flowserve can provide general guidelines, it cannot
provide specific data and warnings for all possible applications. The purchaser/user must therefore assume the ultimate
responsibility for the proper sizing and selection, installation, operation, and maintenance of Flowserve products. The
purchaser/user should read and understand the Installation Instructions included with the product, and train its employees
and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative
purposes only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon. Nothing
contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this
product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and
information contained herein are subject to change without notice. Should any question arise concerning these provisions, the
purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices.
© Copyright 2005 Flowserve Corporation
flowserve.com
Europe, Middle East, Africa
Flowserve Corporation
Roosendaal, The Netherlands
Telephone: 31 165 581400
Telefax: 31 165 552622
Asia Pacific
Flowserve Corporation
Singapore
Telephone: 65 684 65100
Telefax: 65 674 71963
Latin America
Flowserve Corporation
Mexico City
Telephone: 52 55 5567 7170
Telefax: 52 55 5567 4224
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