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Figure 7, Typical flange mounted transmitter installation – Honeywell ST 3000 User Manual

Page 39

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4.1

Mounting ST 3000 Transmitter,

Continued

Flange mounting

To mount a flange mounted transmitter model, bolt the transmitter’s
flange to the flange pipe on the wall of the tank.

ATTENTION

On insulated tanks, remove enough insulation to accommodate the
flange extension.

Figure 7 shows a typical installation for a transmitter with the flange on
the high pressure (HP) side so the HP diaphragm is in direct contact
with the process fluid. The low pressure (LP) side of the transmitter is
vented to atmosphere (no connection).

It is the End User’s responsibility to provide a flange gasket and mounting hardware that are suitable for the
transmitter’s service condition.

To prevent degradation of performance in Flush-Mounted Flanged Transmitters, exercise care to ensure
that the internal diameter of the flange gasket does not obstruct the sensing diaphragm.

To prevent degradation of performance in Extended Mount Flanged Transmitters, ensure that there is
sufficient clearance in front of the sensing diaphragm body.

Figure 7

Typical Flange Mounted Transmitter Installation

Variable

Head H1

Reference

Leg

Attention: Dotted area indicates use
with closed tank with reference leg.

LP Side vented

to atmosphere

HP Side

mounted
to tank

Minimum Level

Maximum Level

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ST 3000 Release 300 Installation Guide

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