Orange Research 2320 Series Instructions

INSTRUCTIONS
Series 2220, 2320, 2420
IN-LINE FLOW INSTRUMENTS
Variable-Orifice
Your new Orange Research in-line flow meter is a rugged
instrument featuring a simple and reliable design. Read all
instructions carefully before attempting to install the instrument.
Caution:
Do not exceed maximum operating pressure
listed on instrument label. Use only with fluids compatible
with wetted parts.
HOW IT WORKS
The instrument operates on the difference between two
pressures (delta-P). This delta-P develops as flow is established
through a variable orifice which is formed between the spring-
biased metering cone and the end cap in which the cone rests
(see Fig. A). The variable orifice allows the cone to move linearly
in proportion to the delta-P. A magnet located on the metering
cone moves with the cone and rotates a follower magnet located
in a chamber adjacent to the fluid cavity. The gauge pointer is
located at the end of the rotary magnet shaft and rotates with the
magnet to provide gauge readings proportional to flow. There
are no mechanical seals between the flow chamber and the
rotary chamber. This is accomplished by coupling forces
between two adjacent magnets through a solid wall.
SWITCH UNITS
Reed switches are located adjacent to the flow chamber and are
actuated when the cone magnet field interacts at a preset point
with the reed switch armature. Switch set points are adjustable.
2220 Series shown- images vary by model
INSTALLATION
Check the instrument and identify the inlet and outlet markings.
"In" identifies the flow inlet port; "Out" the flow outlet port. Install
units in your piping system using standard pipe fitting
procedures. Thread sealing compound should be kept out of the
unit. The instrument can be line mounted, bracket mounted, or
panel mounted depending upon the model purchased.
It is recommended that a 50 filter be installed upstream of the
flow instrument to assure a clean fluid medium through the
GN128-Variable-Orifice Rev. 0
Fig. A
Orange Research, Inc.
instrument. Also, good flow measurement practices recommend
straight runs of pipe equal to at least 10 pipe diameters upstream
and 5 pipe diameters downstream of the gauge to reduce flow
turbulence.
Important: Because of the magnetic nature of this instrument, it
should never be mounted in direct contact with a steel surface,
otherwise a calibration shift may occur. Mount the instrument so
that the body is at least 1" away from steel surfaces using non-
magnetic spacers or an aluminum mounting bracket.
Unless otherwise specified at the time of order, instruments are
calibrated in the horizontal position. Instruments should always
be mounted in the same position as they were calibrated to
eliminate positional errors.
MAINTENANCE
Your Orange Research instrument will provide years of
maintenance-free operation. Other than replacing a broken lens
there is only one area where the instrument may need attention.
Erratic pointer or switch action may indicate that cleaning is
required. Please consult the factory for guidance on how to
properly clean your instrument.
SWITCH ADJUSTMENT
The reed switch set points can be adjusted over the top 80% of
the gauge range.
To change the reed switch setting, set the flow rate to the desired
switch set point. Loosen the set screw holding the switch in
place. To increase or decrease the set point for all units, slide
the switch tube until the switch actuates. If applicable, tighten the
set screw to hold the switch in place and recheck the new
actuation point.
Caution: Do not overtighten the switch holding set screw.
(In some cases, it might be necessary to reverse the switch
tube end-for-end to locate the new actuation point. This is a
normal procedure.)
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