PN25080
Vortex Meter (TRIO-WIRL V) 3 - 9
TRIO-WIRL INSTRUCTION MANUAL
When correctly installed, the installation should look
like that shown in Figure
below
3.4.2.5 Control Valve Installation
Control valves should be installed downstream from the flow-
meter as shown in Figure
. When this is not possible, the
control valve should be located > 50D upstream from the flow-
meter.
3.4.2.6 Extreme Temperature Applications
For process temperatures above 160
o
F (71
o
C) or
below 0
o
F (-18
o
C), it is critical that the meter be pres-
surized and placed into service gradually, i.e., with suf-
ficient time delay to minimize thermal shock. Steam
should be introduced gradually so that the meter is
brought up to operating temperature over a ten to fif-
teen minute period.
INSULATING THE VORTEX METER
The flowmeter primary can be insulated to a max. thickness of
4 inches (100 mm) [Refer to Figure
].
FIGURE 3-8 RECOMMENDED FLANGE BOLT
TIGHTENING SEQUENCE
FIGURE 3-9 FLANGE PROCESS CONNECTIONS
WARNING
WHEN THE METER IS USED IN A VERY HIGH OR
LOW TEMPERATURE PROCESS, THE TEMPER-
ATURE OF THE METER BODY MAY BE
EXTREMELY HOT OR COLD. IF IT IS NECES-
SARY TO TOUCH THE SENSOR HOUSING OR
METER BODY, INSULATED GLOVES MUST BE
WORN TO PREVENT SERIOUS INJURY.
CAUTION
THE PIPELINE AND METER BODY MAY BE INSU-
LATED BY THE USER UP TO A THICKNESS OF 4
IN. (100 MM) BUT THE METER INTERCONNEC-
TION WIRING BOX AND SENSOR HOUSING
TOWER MUST NOT BE INSULATED. AMBIENT
AIR IS REQUIRED TO DISSIPATE HEAT OR COLD
BUILD-UP WITHIN THE INTERCONNECTION WIR-
ING BOX.
Refer to Figure
FIGURE 3-10 CONTROL VALVE INSTALLATION