Dwyer RMV - Manual

Series RMV Rate-Master ® Flowmeters
Specifications — Installation and Operating Instructions
Bulletin F-52
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: Brass, copper, 302 SS, sintered barium ferrite.
Temperature Limits: 20 to 200°F (-6.7 to 93°C).
Pressure Limit: 1000 psig (68.9 bar).
Pressure Drop: 0-5 GPM: 3.2 PSID; 0-10 GPM: 5.3 PSID; 0-20 GPM:
10.4 PSID.
Accuracy: ±2% of full scale.
Size: Diameter dial face 4˝ (101.6 mm).
Process Connections: See Chart.
Maximum Flow: 1.5 x full scale reading.
Weight: 9 Ib (4.08 kg). Series RMV Rate-Master ® Dial-Type Flowmeters provide accurate,
dependable measurement of water flows to 20 GPM. Installed in-line,
they employ a “target” type element linked to a flexible leaf spring which
deflects in proportion to the force generated by the flowing medium.
A magnet attached to the free end of the spring drives a mating magnet
to which the indicating pointer is attached. Because the spring/magnet
assembly is isolated from the mating magnet/pointer assembly by a wall
in the brass casting, there is no direct mechanical linkage. This means
units can easily withstand over-range flows to 150% without damage
and there is no path for leaks. This construction also allows units to be
specially calibrated for dark and/or opaque liquids which would be
impossible to see with typical rotameter style instruments. Models are
available with 1/2˝, 3/4˝ or 1˝ female connections.
CALIBRATION
All Series RMV flowmeters are calibrated at the factory for mounting with
scale vertical and flow from left to right when facing unit. They must be
used in that position for accurate readings. If flowmeter was specially
calibrated for some other position, it will be marked accordingly.
These flowmeters will normally retain their original accuracy for the life
of the device. If, at any time you want to check calibration, do so only
with instruments of certified accuracy. Do not attempt to check the RMV
Rate-Master
® flowmeters with other flowmeters piped in a series. Even
minor variations in piping and back pressure can cause a significant
difference in indication. Your flowmeter may be returned to the factory
for a calibration check at no charge. This no-charge check does not
include written certification or any repairs necessary to restore proper
operation.
Model
RMV-1-3
RMV-2-3
RMV-3-3
RMV-1-2
RMV-2-2
RMV-3-2
RMV-1-1
RMV-2-1
RMV-3-1 Range, GPM Water
0-5
0-10
0-20
0-5
0-10
0-20
0-5
0-10
0-20 Connection Size
1˝ female NPT
1˝ female NPT
1˝ female NPT
3/4˝ female NPT
3/4˝ female NPT
3/4˝ female NPT
1/2˝ female NPT
1/2˝ female NPT
1/2˝ female NPT
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