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MS MSA IOMP Manual - 2 Column Installation & Parts Manual
MS-Series Spherical Two-Case Meters
Installation: M100-20
www.lcmeter.com 2
Table of Contents
Description
Page Number
Safety Precautions .................................................................................... 3
How LC Meters Work ................................................................................ 4
Owners Information Packet ...................................................................... 5
Installation Requirements .......................................................................... 6
System Design Considerations ................................................................. 7-10
Operation Requirements ........................................................................... 11
Meter Start Up and Operation ................................................................... 12-14
Reversing the Meter Registration ................................................. 13
Setting the Standard Adjuster ....................................................... 14
Meter Maintenance ................................................................................... 15-16
Servicing the Drive Components .................................................. 17-20
Removing the Dust Cover ............................................................ 17
Removing the Adjuster and Adjuster Driver Assembly ................. 17-19
Servicing the Packing Gland ........................................................ 19
Packing Gland Components ......................................................... 20
The Retaining Plate ...................................................................... 20
Disassembling the Meter ........................................................................... 21-26
Draining Fluid from the Meter ....................................................... 21
Opening the Weldment Assembly ................................................ 21-22
Removing Rotor Gears ................................................................. 22-24
Removing the Bearing Plate and Rotors ...................................... 24-25
Removing the Meter Housing Assembly....................................... 25
Universal Joint Assembly ............................................................. 26
Reassembling the Meter ........................................................................... 27-30
Installing the Meter ....................................................................... 27
Assembling the Meter ................................................................... 27-28
Rotor Gear Timing ........................................................................ 29
Reassembling the Weldment Assembly ....................................... 30
Bolt Tightening Sequence ......................................................................... 31
Wrench and Socket Size Chart ................................................................. 31
Fastener and Torque Chart ....................................................................... 32
Identification of Bolt Grades ...................................................................... 33
Troubleshooting ............................................................................ 33-34
How to Order Replacement Parts ............................................................. 35
Parts Breakdown ....................................................................................... 36-39
Please have the following information available when making inquiries, ordering replacement
parts, or scheduling service. If a specific meter accessory is involved, please provide the model
and serial number of the meter in question (see page 5).
Meter Serial Number
________________________________________
Full Service Distributor
________________________________________
Full Service Distributor Phone Number ________________________________________ 3
Safety Precautions
NOTICE:
This manual provides warnings and procedures that are
intended to inform the owner/operator of the hazards
present when using the Liquid Controls Meter on LPG
and other products. The reading of these warnings and
the avoidance of such hazards is strictly in the hands of
the owner/operator of the equipment. Neglect of that
responsibility is not within the control of the manufacturer
of the meter.
SAFETY PROCEDURES:
Remember to relieve internal pressure before
disassembly or inspection of the strainer, vapor eliminator,
valves, POD pulser, and the front or rear covers. See
Meter Maintenance on Page 15 for the steps to relieve
internal pressure in your system.
BE PREPARED:

Make sure that all necessary safety precautions have
been taken. Provide for proper ventilation,
temperature control, fire prevention, evacuation, and
fire management. Provide easy access to the appropriate fire
extinguishers for your product. Consult with your local
fire department, state, and local codes to make sure
that you are adequately prepared. Read this manual as well as all the literature provided
in your Owners Information Packet. If you have
any questions, consult your full-service distributor or
call the Service Department at Liquid Controls.
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WARNING
All internal pressures must be relieved before disassembly of the meter, strainer, vapor eliminator,
any valves in the system, the pulse output device, or the front and rear covers. LINE PRESSURE
MUST BE 0.0 PSI. See Meter Maintenance on Page 15 for the procedures to relieve internal
pressure.
IN THE EVENT OF A GAS LEAK:
In the event of a large gas leak:
Evacuate the area and notify the fire department.
In the event of a small, contained gas leak:
1. Stop the leak.
2. Prevent accidental ignition.
3. Prevent entrance of gas into other portions of the
building. Some gases, such as LPG, seek lower
levels, while other gases seek higher levels.
4. Evacuate all people from the danger zone.
5. See that the gas is dispersed before resuming
business and operating motors. If in doubt, notify your
local fire department.
IN THE EVENT OF A GAS FIRE:
In the event of large fires or fires that are spreading:
1. Evacuate the building and notify your local fire
department.
2. Stop the leakage only if the equipment can safely be
reached.
In the event of small, contained fires that you can safely
control:
1. Stop the leakage only if the equipment can safely be
reached.
2. Use the appropriate extinguisher: Class B fire
extinguisher, water, fog, etc., depending on the
materials. If in doubt, call your local fire department. 4
How LC Meters Work
Liquid Controls MS-Series meters are positive
displacement flowmeters. They are designed for liquid
measurement in both custody transfer and process
control applications. Because of their simple design, they
are easy to maintain, and can easily be adapted to a
variety of systems.
The meter element (1) is designed with three cylindrical
bores (2). A Blocking rotor (3) and two Displacement
rotors (4,5) turn in a synchronized relationship within the
bores. The three rotors are supported by bearing plates
(6,7). The ends of the rotors protrude through the bearing
plates. Blocking rotor gear (8) is placed on the end of
the blocking rotor (3). Displacement rotor gears (9,10)
are placed on the ends of the displacement rotors (4,5).
These gears create the synchronized timed relationship
between the three rotors.
As fluid moves through the meter element, the rotor
assembly turns. The liquid is segmented into uniform
sections by the turning rotors. Fluid displacement
happens simultaneously. As fluid enters, another portion
of the fluid is being partitioned and measured. At the
same time, the fluid ahead of it is being displaced out of
the meter and into the discharge line. Since the volume
of the bores is known, and the same amount of fluid
passes through the meter during each revolution of the
blocking rotor, the exact volume of liquid that has passed
through the meter can be determined.
This true rotary motion is transmitted through either the
pulse output device (POD) to the encoder, or the face
gear and drive shaft to the counter/register. True rotary
motion output means consistent accuracy since the
register indication is in precise agreement with the actual
volume throughput at any given instant.
At any position in the cycle, the meter body, the blocking
rotor, and at least one of the displacement rotors form a
continuous capillary seal between the un-metered
upstream product and the metered downstream product.
Capillary seals mean no metal-to-metal contact within
the metering element. This means no wear. No wear
means no increase in slippage, and no increase in
slippage means no deterioration in accuracy.
Throughout the metering element, the mating surfaces
are either flat surfaces or cylindrical faces and sections
that are accurately machined. These relatively simple
machining operations, plus the fact that there is no
oscillating or