2-3
Installation
Pancake Type Seals
FIGURE 2-2. Pancake Type Seal.
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.
Blind Flange Rosemount offers the option of supplying the blind flange, otherwise the
blind flange is furnished by the customer. For certain pancake seal
assemblies, the Rosemount supplied blind 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.
Flushing Connection Ring
Installation
The Pancake type seals are available with an optional flushing
connection ring (or lower housing). For certain seal types the flushing
connection ring is supplied with four clips and screws that attach the
diaphragm seal to the lower housing in order to make installation
easier.
Gasket Installation When connecting the diaphragm seal, gasket, and flushing connection
ring make sure the gasket is properly aligned on the gasket sealing
surface.
Customer Process
Connection Flange
Flushing Connection
Ring
(Lower Housing)
Capillary
Connection
Upper
Housing
Blind Flange
Gasket
Process Side
3051-3031E23B
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