Liquid Controls M-MA Meters - Manual (Page 12)

▪ prevent pIpe straIn or stress
Prevent pipe strain or stress from occurring when making meter or
accessory repairs. Pipe strain and stress occurs when the pipes
are not supported or are not aligned correctly to the meter. The
weight of the pipes must always be supported independent of the
meter. This means that the meter and accessories can be easily
removed without affecting the pipes or the pipe alignment. Never
leave any of the pipes hanging.
▪ seasonal Meter storaGe
If the meter is used for seasonal work, the meter should
be removed from the system and thoroughly flushed with a
compatible liquid at the end of each season. To flush the meter,
remove the drain plug on the front and rear covers. Then flush the
product from the front and rear covers. If flushing with water, extra
care should be taken to drain the meter completely and dry all
internal parts. Refill the meter Immediately with a compatible liquid
(or oil misting). Refilling is essential to preventing corrosion and
ice damage that can result from any moisture that was overlooked
after flushing and drying.
▪ do not Mar or scratch
Do not mar or scratch any of the precision machined surfaces by
prying or sanding parts.
▪ torque all fasteners
Torque all fasteners such as screws and bolts in accordance with
specifications listed in the Torque Chart on page 21.
▪ stone the MachIned surfaces
Stone the machined surfaces when reassembling the meter to
assure that the machined surfaces are free of burrs and mars.
▪ repaIr pulled threads
Repair pulled threads with threaded insert fasteners. These can
be used in many instances. Contact your full-service distributor for
advice if this occurs.
▪ coat threads WIth antI-seIze
Coat threads with anti-seize when removing and replacing bolts
and castings in the meter.
▪ reMovInG flanGe Gaskets
Removing flange gaskets When removing the flange assembly,
always carefully scrape off the flange gaskets. Make sure that the
flange surface has been scraped clean. Discard the old flange
gasket and install a new flange gasket. Never reuse old flange
gaskets.
▪ exaMIne all fasteners
Examine all fasteners to make sure they are not bent, rusted, or
have pulled threads. The threads should all appear evenly placed.
If the bolts are bent, check the housing and cover for flatness. Use
a straight edge to determine flatness.
▪ look for Gaps
Look for gaps when disassembling a meter. Use a feeler gauge
to check for gaps between the bearing plate and housing. If you
do find gaps, check the bearing plates for flatness with a straight
edge. Gaps can be caused by shock problems. If shock problems
exist, they must be resolved. Contact your full-service distributor
for assistance if this occurs.
▪ check the o-rInGs
Check the O-rings for damage. Cracked, rough, or worn O-rings
should be replaced. However, a more serious problem of shock
may be indicated if the O-rings look nibbled. Shock problems must
be verified and resolved. Contact your full-service distributor for
assistance if this occurs.
▪ check the bearInG plates
Check the bearing plates for flatness. Use a straight edge.
Warped bearing plates can be caused by shock problems. If shock
problems exist, they must be resolved. Contact your full-service
distributor for assistance if this occurs.
▪ check WIth reGulatory aGency
Check with regulatory agency that governs Weights & Measures
in your area. Removing the dust cover seal wire or other
maintenance procedures may require Weights & Measures
recalibration.
MaIntenance requIreMents
Before disassembly of any meter or accessory component:
• all internal pressures must be relieved and all liquid drained from the system in
accordance with all applicable procedures.
• pressure must be 0 (zero) psi.
• close all liquid and vapor lines between the meter and liquid source.
For Safety Rules, refer to local authorities and relevant NFPA Codes.
failure to follow this warning could result in property damage, personal injury, or death from
fire and/or explosion, or other hazards that may be associated with this type of equipment.
! WarnInG
Liquid Controls disclaims all liability for damage to
meter or accessories because of corrosion, salting
out of product, or separation of chemicals whether
occurring during periods of use or storage.
DISCLAIMER
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