2.6.2
Seam weld design
A seam weld design is used when the upper housing material is different from the
diaphragm material. The seam welded design has a hermetic weld at the inner diameter of
the diaphragm and a TIG weld at the outer edge. The diaphragm floats on the upper
housing over the gasket surface area and could tear if a metallic gasket were used.
A
B
D
C
E
F
A. Material A
B. Material B
C. Upper housing
D. Diaphragm
E. TIG weld point
F. Seam weld point
2.6.3
Brazed design
This process uses a brazing ring where the metals are brazed to attach the diaphragm to
the upper housing. This allows the gasket surface area to solidify as it is melted to the
upper housing.
This option is used with Tantalum diaphragm when a metallic gasket is required.
A
B
C
D
E
A. Material A
B. Tantalum
C. Upper housing
D. Brazing ring
E. Diaphragm
Remote Seal Systems
Reference Manual
May 2020
00809-0100-4002
16
Rosemount DP Level
Summary of Contents for Rosemount 1199
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Page 8: ...Introduction Reference Manual May 2020 00809 0100 4002 8 Rosemount DP Level ...
Page 22: ...Remote Seal Systems Reference Manual May 2020 00809 0100 4002 22 Rosemount DP Level ...
Page 74: ...Installation Reference Manual May 2020 00809 0100 4002 74 Rosemount DP Level ...
Page 92: ...Fill Fluids Reference Manual May 2020 00809 0100 4002 92 Rosemount DP Level ...