Initial Start-Up - GPI G Serie Manual Del Propietário

INSTALLATION
Turbine flowmeters are affected by
both upstream and downstream
process configurations. Turbine flow-
meters should always be installed
with a minimum of 10 pipe diam-
eters upstream and 5 pipe diameters
downstream. The only exception is
the placement of the pumps, valves,
etc., on the upstream end. When this
occurs, 20 diameters of straight pipe
should be used. The direction of flow is
indicated by the arrow on the turbine.
All turbine flowmeters are designed
to measure flow in only one direction.
Check the items below once the turbine
flowmeter is installed in the process
line. This will ensure a successful
start-up.
1. Install magnetic pickup
(See Figure 1).
2. Make sure that the new or correct
K-factor is entered into the readout
device.

Initial Start-Up

Turbine flowmeters can be installed
in the horizontal or vertical position.
END VIEW
RETAINING ROTOR
RING SUPPORT
Figure 1
ROTOR
When installing a turbine flowmeter
in the vertical position, it is important
that the direction of flow be up through
the turbine flowmeter.
A spool should be installed in place
of the turbine flowmeter during initial
start-up of a new process line. The
process line should be purged, thus
eliminating any solids contained in
the line. Once this is completed, the
spool can be removed and the turbine
flowmeter installed.
NOTE: Control valves should always
be installed downstream of the
turbine flowmeter.
The turbine flowmeter should be
installed in a location where the pro-
cess line will remain full of liquid at all
times. Otherwise, when the process
line becomes empty and a valve is
opened, the high velocity fluid hitting
the turbine flowmeter rotor can cause
severe damage.
When there is trapped air in the pro-
cess line, an air eliminator should be
used. This trapped air causes air pock-
ets and these air pockets will cause
the rotor to spin at a faster rate than
MAGNETIC PICKUP
(HAND TIGHTEN ONLY)
F L O W
➞
BODY ROTOR RETAINING
SUPPORT RING
3