MLI1 3"-72" Meter Head Assembly 150 psi, Indicator-Totalizer0 pages

30111-05

Rev. 4.0/02-13

MODEL MLI1
150 psi METER HEAD ASSEMBLY
SEALED METER MECHANISM - MAGNETIC DRIVE
INDICATOR - TOTALIZER
SIZES 3" thru 72"

INDICATOR
HAND

TOTALIZER
TEST HAND
TYPICAL 4" DIAL
INDICATOR-TOTALIZER

DESCRIPTION

SPECIFICATIONS

MODEL MLI1 METER HEAD ASSEMBLIES are manufactured to the
highest standards. Materials used on all meters and flow ranges
for the low velocity meter meet or exceed AWWA standard C70402. The bolt-on design permits use in a wide range of applications
with up to 150 psi working pressure. It is necessary, upon ordering,
to furnish the meter size, model number and serial number of the
meter it is replacing.
INSTALLATION is made by bolting the meter head assembly to the existing
saddle or meter tube. The meter can be installed horizontally, vertically, or inclined on suction or discharge lines. The meter must have
a full flow of liquid for proper accuracy. Fully opened gate valves,
fittings or other obstructions that tend to set up flow disturbances
should be a minimum of ten pipe diameters upstream and two pipe
diameters downstream from the meter. Installations with less than ten
pipe diameters of straight pipe require straightening vanes. Meters
with straightening vanes require at least five pipe diameters upstream
and two pipe diameters downstream of the meter.
PROPELLER is magnetically coupled with the drive mechanism through
the sealed oil filled gearbox. This completely eliminates water entering the meter assembly, as well as the need for any packing gland.
The propeller is a conical shaped three bladed propeller, injection
molded of thermoplastic material resistant to normal water corrosion
and deformity due to high flow velocities.
BEARING in propeller is a water lubricated ceramic sleeve and spindle
bearing system with a ceramic/stainless steel spindle. Dual ceramic
thrust bearings, standard on all meters, handle flows in both forward
and reverse directions. The bearing design promotes extended
periods of maintenance free propeller operation. Bearings within
the sealed meter mechanism are shielded precision stainless steel
bearings and are factory lubricated for the life of the meter.
INDICATOR-TOTALIZER is mechanically driven by the meter mechanism
and features a full 4" diameter, 250 degree sweep dial with a six
digit, straight reading type totalizer and sweep test hand. The indicator drive mechanism is temperature compensated so the indicator
will be accurate at all points on the dial when operated between
32° and 140° F. The indicator dial can be furnished in GPM, CFS,
MGD or any standard liquid measuring units with choice of standard
totalizer measuring units. The bonnet, with padlock hasp, is o-ring
sealed to the meter head.
CHANGE GEARS may be easily exchanged in the field when changing the
dial, or when recalibrating for different pipe sizes. It is not necessary
to remove pressure from the line for these changes.
O-RING SEALS are used at the meter head and all points where seals
are required, making the meter mechanism completely immune to
any of the corrosive effects of atmospheric moisture or the liquids
measured by the meter assembly.

tACCURACYtminus 2% of actual flow within the range
Plus or
specified for each meter size.
t PRESSURE RANGEt Up to 150 PSI maximum working pressure.
tTEMPERATUREt F Maximum. Consult factory for special
140°
tRANGEt for higher temperatures.
construction
t
MINIMUM FLOWSt As shown for each meter size and construction are
required for accurate registration. See flow chart.
NOTE: Minimum flow will be higher when auxiliary
equipment is added.
t MAXIMUM FLOWSt As shown for each meter size and construction are
rated for continuous operation. See flow chart.
t
INTERMITTENTt As shown for each meter size are rated for 10%
tFLOWSt total time the meter is operating.
to 15% of the
Consult factory for High Velocity construction when
intermittent flows are higher than shown on flow
chart and/or when longer operating periods are
required.
t
MATERIALSt Used in construction are chosen to minimize the
corrosive effects of the liquids measured by the
meter assembly.
tt MAGNETS - permanent ceramic type
tt INTERIOR BEARINGS - shielded stainless steel
tt PROPELLER BEARING - ceramic sleeve type
tt PROPELLER SPINDLE - ceramic sleeve/stainless
steel
tt PROPELLER - injection molded thermoplastic
tt GEARBOX - stainless steel
tt SEPARATOR - stainless steel
tt SHAFTS - stainless steel
tt METER HEAD BOLTS - stainless steel
tt METER HEAD - cast iron or fabricated steel, NSF
approved, fusion epoxy coated.
t
OPTIONALt Totalizer Extensions and a wide range of cont
EQUIPMENTt trols and instruments for indicating, totalizing
and recording flow data for each meter. Special
constructions and materials are available upon
request.
t
ORDERING INFOt Must be specified by the customer and includes:
tttMeter size
tttModel number
ttt Serial number of the meter it is replacing
ttt I.D./O.D. of pipe
tt

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