Installation UMSITRPDS3-1
November 2005
4-24
Models 7MF4333, 7MF4433, and 7MF4533
920-07012-XXX-1.pdf
FIGURE 4-13 Differential Construction, Position Options
4.4.2 Direct Mounting to Process, Model 7MF4433 or 7MF4533
A differential transmitter can be interfaced to the process through a
two- or three-valve manifold and supported by the piping
connections (3-inch nipples) if mounted directly at the point of
measurement.
Transmitter process connections are on 2.13-inch (54 mm) centers
to allow direct mounting (bolting) to a manifold with the same
spacing. Each transmitter process connection (end cap) has two
tapped 7/16-20 mounting holes and a 1/4 NPT tapped pressure
inlet. High pressure (+) and low pressure (-) sides of the transmitter
are marked by labels (see Figure 4-12) and engraved on the capsule
between the end caps.
Process orifice flanges with standard 2.13-inch spacing permit a transmitter and two- or three-valve
manifold combination to be direct mounted.
The procedure for mounting a transmitter to a two- or three-valve manifold, and the manifold to the
orifice flanges, is covered by the installation instructions supplied by the manifold manufacturer.
The following is a guide and may need to be modified for some installations. Teflon
®
tape is the
recommended thread sealant for process connections at the transmitter.
1. If installed, remove process connection blocks from the transmitter’s end caps (process manifold).
2. Press the supplied O-ring seals into the grooves in the face of the two- or three-valve manifold and
bolt the transmitter end caps to the transmitter side of the two- or three-valve manifold. Tighten
mounting bolts to 400 in/lbs (45.2 Nm).
MG00352b
Nipple Mount for
Liquid Service
3-Valve
Manifold
High
Pressure
Side
Low
Pressure
Side
Flow
Orifice
Flanges
End Cap
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