Liquid Controls 2 & 3 HiCap Strainers - Manual (Page 4)

4
Maintenance
! ! ! ! ! WARNING
All internal pressures must be relieved before disassembly of the meter, strainer, air eliminator,
any valves in the system, the pulse output device, or the front and rear covers. LINE PRESSURE
MUST BE 0.0 PSI. Refer to your meter manual for instructions on reducing the internal pressure.
Personal injury or death may result from working on a system under pressure.
It is very important to follow the strainer preventive
maintenance procedures to protect the strainer as well
as the metering system. Foreign matter that builds up
inside the strainer, including ice, can cause damage to
the strainer and the metering system. When foreign
matter builds up inside the strainer, it can cause pressure
to build up inside the strainer. This pressure can cause
the strainer screen to rupture. Foreign matter can then
enter the metering chamber. This can cause serious
damage to the meter, and may result in failure of the
meter.
The following strainer preventive maintenance
procedures will keep your strainer functioning properly,
keep strainer repair costs to a minimum, and insure the
protection of your metering system.
Newly installed or repaired systems
• Check the strainer daily during the first 100 hours of
operation or until no more debris is found in the
strainer.
• New or repaired piping can be the source of welding
slag or other foreign particles that can block or rupture
the strainer screen.
• Once a system is cleaned out, the strainer should
be checked several times every season. The
frequency depends on the specific service conditions,
throughput, and product cleanliness.
Disassembling the Strainer
(See Page 7 for Item Numbers)
1. Carefully clean around strainer basket cover plate
(2). Remove all foreign matter.
2. Remove the four bolts (7) and washers (8) from the
end cover plate.
3. Remove the end cover plate (2) and O-Ring (4) from
the strainer housing.
4. Remove the strainer basket. This may dislodge dirt
and particles into the strainer housing.
5. Check inside the strainer housing for any foreign
material. Be sure to wipe the housing clean with a
clean, soft, shop rag.
6. Clean the strainer basket by flushing the basket with
a liquid cleaning agent suited for your application. A
soft brush may be used to dislodge imbedded
particles. If the imbedded particles cannot be
removed, replace the basket. Never tap the basket
ends on a hard surface to dislodge particles. This
may dent the basket and make reassembly difficult
or cause improper sealing.
7. Clean the inner face of cover plate, mating face of
the strainer body, and seal ring with a clean, soft,
shop rag.
8. Make sure the O-Rings are cleaned of all dirt and
grime. Check the O-Rings for damage. If the O-
Rings cannot be cleaned or are damaged or frayed,
replace them. Never reuse Teflon O-Rings. Always
replace them even if they appear to be in good
condition.