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Reference Manual
00809-0100-4002, Rev BB
November 2012
3-7
Rosemount 1199
PFW PANCAKE TYPE
SEALS
Figure 3-9. PFW 2-D Diagram
Figure 3-10. PFW Pancake Type
Seal 3-D Diagram
Capillary Support Tube
A common option for the Pancake type seal is the capillary support tube. Due
to the side capillary-to-seal connection, the support tube provides a handle for
aligning the Pancake seal during installation. The support tube should not be
used for supporting any weight.
Process Flange
Emerson Process Management offers the option of supplying the process
flange, otherwise the process flange is furnished by the customer. For certain
pancake seal assemblies, the Emerson supplied process flange has a
machined hole through the center of the flange. This hole corresponds to a
threaded connection in the back of the pancake seal upper housing. The
flange can, therefore be connected to the seal prior to installation to make
handling easier.
Bolt Torquing
When connecting the process and mating flange, the bolts should be torqued
to the applicable flange requirements. Required torque is a function of the
gasket material and surface treatment of the bolts and nuts which are
customer supplied.
Instrument
Connection
Process
Flange
Gasket
Flushing Port
Flushing Ring
Diaphragm
Socket Head Cap Screw Thread Size (
5
/
16
in.
- 24x1 in. socket)
Clamp
Ring
Upper
Housing
Process Flange
Diaphragm
Flushing Connection
Clamp Ring
Gasket
Support Tube
Содержание 1199
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