Rcw Remote Flanged Seal - Ring Type Joint (Rtj) Gasket Surface - Emerson Rosemount 1199 Reference Manual

Installation
May 2020
3.10 RCW remote flanged seal - ring type joint (RTJ)
gasket surface
Figure 3-13: RCW Flanged Remote Seal RTJ and Flushing Connection Ring
A. Upper housing
B. Diaphragm
C. Lower housing or flushing ring
D. Stud bolts
Note
A lower housing is always required for the RCW type seal.
Table 3-3: RCW Upper Housing Torque Values
Material (nuts and bolts)
(1) 53 ft-lb for 4.1-in. diaphragm size.
Note
This is the specification for connecting the remote seal to the lower housing, not the
torque specification for the lower housing onto the process flanged connection. The lower
housing bolts should be torqued to the applicable flange requirements.
3.10.1 4.1-in. (104 mm) diaphragm diameter option
The standard diaphragm size for the RCW remote flanged seal with RTJ gasket surface is
2.4-in. A larger, 4.1-in. (104 mm), diaphragm size is offered for small spans to reduce
temperature error when taking process measurements.
40
Bolt thread size
SST 3/8–24 NF
CS 3/8–24 NF
½–20 NF
SST
CS ½–20 NF
Reference Manual
00809-0100-4002
D
Class
150/300/600 lb
150/300/600 lb
900/1500 lb
900/1500/2500 lb
Rosemount DP Level
Torque
23 ft-lb
(1)
23 ft-lb
50 ft-lb
105 ft-lb