9
Reference Manual
00809-0100-4809, Rev DA
Section 2: Installation
September 2015
Installation
Stainless steel bolts supplied by Rosemount Inc. are coated with a lubricant to ease installation.
Carbon steel bolts do not require lubrication. Do not apply additional lubricant when installing
either type of bolt. Bolts supplied by Rosemount Inc. are identified by the following head
markings:
Figure 2-4. Coplanar Mounting Bolts and Bolting Configurations for Coplanar Flange
2.5.4 Instrument manifolds
Figure 2-5 on page 10 identifies the valves on a 5-valve and a 3-valve manifold. Table 2-1 on
page 10 explains the purpose of these valves.
An instrument manifold is recommended for all installations. A manifold allows an operator to
equalize the pressures prior to the zero calibration of the transmitter as well as to isolate the
electronics from the rest of the system without disconnecting the impulse piping. Although a
3-valve manifold can be used, a 5-valve manifold is recommended.
5-valve manifolds provide a positive method of indicating a partially closed or faulty equalizer
valve. A closed faulty equalizer valve will block the DP signal and create errors that may not be
detectable otherwise. The labels for each valve will be used to identify the proper valve in the
procedures to follow.
Carbon Steel Head Markings
(CS)
Stainless Steel Head Markings
(SST)
Transmitter with
flange bolts
Transmitter with
optional flange adapters
and flange/adapter bolts
Transmitter with 3-valve manifold,
manifold/flange bolts,
flange adapters, and
flange/adapter bolts
Description Size in. (mm)
Flange bolts (4) 1.75-in. (44 mm)
Flange/adapter bolts (4) 2.88-in. (73 mm)
Manifold/flange bolts (4) 2.25-in. (57 mm)
1.75 (44) × 4
2.88 (73) × 4
2.25 (57) × 4
1.75 (44) × 4
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