Liquid Controls Strainers F-7, FA-7, F-15, F-30 & Steel Series - Manual (Page 5)

5
maInTenanCe
disassembling a strainer
To disassemble a strainer
1. Carefully clean strainer basket cover
plate to remove all foreign matter, and
remove the four bolts and washers from
the end cover plate.
2. Remove the end cover plate (cover plate
is on the top of FS/FSAA/FSA strainers)
and o-ring from the strainer housing.
3. Remove the strainer basket. This
may dislodge dirt and particles into
the strainer housing. Check inside the
strainer housing for any foreign material.
Be sure to wipe the housing clean, using
a soft cloth.
4. 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.
5. Clean the inner face of cover plate, mating face of the
strainer body, and seal ring with a clean, soft, cloth.
6. 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.
maintenance
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
resulting in failure of the meter.
The following strainer preventive maintenance precedures
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, through put and
product cleanliness.
When an air eliminator is used with the strainer, it
must be installed vertically on the strainer.
Air Eliminators & Strainers
Never reuse PTFE O-rings. Always replace them even if
they appear to be in good condition.
Replace PTFE O-rings
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.
Installation and operation
1. flush all new systems
Flushing the system before the meter has been installed is the preferred first step. Thoroughly flush the lines until the system is
purged of all foreign materials. See Strainer Maintenance for disassembly and reassembly instructions.
2. Plan a location for the strainer in the system providing for the following requirements:
Make sure there is no pipe strain imposed upon the strainer or any other component part of the meter assembly. This means that
the meter and its accessories must not support the weight of the piping. Plan for enough space to allow clearance so that the
strainer basket cover and strainer basket can be easily removed.
3. Install the strainer
(1) Install the strainer on the inlet side of the meter
(2) Bolt the strainer outlet to the inlet flanged connection of the meter.
(3) Then bolt the inlet piping to the inlet flanged connection of the strainer.
4. Check the strainer daily during the first 100 hours of operation
New or repaired piping can be the source of welding slag or other foreign material that will
block or rupture the strainer screen. or until no more debris is found in the strainer.
5. Inspect and clean the strainer basket regularly
To ensure proper operation.
6. follow strainer maintenance
Follow the steps outlined in the Strainer Maintenance section of this manual.
Meter
Inlet Side