Viking Pump TSM641.3: Eaton Mod 80 Y-Strainer - Manual (Page 3)

Installation, Continued
Y-strainers have no provision to accept gauges.
Pressure gauges near the strainer inlet & outlet
are required to determine differential pressure
across the strainer and cleaning frequency.
Pressure gauges are essential for the safe op-
eration of the strainer and should be installed us-
ing standard piping practices.
It recommended that a compatible valve (and
piping as needed) be installed in the cover (blow-
off) for safe, quick clean out (normal blow-off
cleaning).
CAUTION: To protect the operator during
draining and clean-out, the fluid must be
piped to a safe area by using the valve in-
stalled on the cover as described above. This
requirement is for all fluids and water
(temperatures above 120° F). The operator
should wear appropriate protective equip-
ment (goggles, gloves, vests, clothing etc.)
consistent with the process fluid for strainer
operation and servicing.
Start-Up
Open the blow-off valve to expel air from the
strainer and slowly allow fluid to enter the
strainer.
CAUTION: Start system GRADUALLY. This
eliminates sudden shock to the strainer and
other equipment in the line. This is EX-
TREMELY important for steam service.
Close vent when air is expelled and fluid begins
to flow.
Shut-Down Periods
Slowly close the pipeline valves upstream and
downstream from the strainer. Make sure these
valves are tightly closed.
Relieve fluid pressure in the strainer by first
opening the drain, then vent if provided. The
strainer must be drained and internal pressure
relived prior to cleaning. Proceed to clean the
screen.
When to Clean the Screen
A differential pressure increase of 5 to 10 psi
across the strainer indicates that the screen is full
of debris and needs to be cleaned.
When to Clean the Screen, Continued
CAUTION: To prevent screen damage, DO
NOT permit differential pressure across the
strainer to exceed 20 psi.
Normal Blow-Down Cleaning
To avoid shutting down the piping system when
possible, clean the screen of debris by opening
the blow-down valve. Valve is to stay open until
all debris has been blown out from the screen.
Then close the valve and resume normal opera-
tion.
Screen Removal, Cleaning and Replacement
Follow the shut-down procedures above. When
the strainer’s internal pressure is relieved, drain
the fluid and loosen fasteners. Remove the cover
(blow-off) and remove the debris laden screen.
Note: Do not permit the screen debris to dry, as
it would be difficult to remove and clean the
screen.
Invert the screen and wash out debris by direct-
ing a stream of air or water against the screen
exterior. Use solvent if stained fluid is fuel or a
chemical. Follow manufacturer’s instructions
when using a solvent to clean the screen.
Inspect screen at each cleaning for holes or
tears. Replace as required. Inspect sealing sur-
faces and cover gasket. Clean sealing surfaces
and cover (blow-off) seat. Replace cover (blow-
off) gasket as necessary.
Note: If Model 80 Strainers have spiral wound
gaskets, these gaskets must be replaced using
only a genuine Eaton part each time the cover
(blow-off) is removed.
Place the cleaned/new screen squarely on the
seat in the cover (blow-off). Replace cover
(blow-off) and tighten the fasteners uniformly.
Close the valve (if provided) and follow the start-
up instructions.
Recommended Spare Parts
1 Eaton Replacement Screen
1 Eaton Replacement Gasket
When ordering spare parts specify all nameplate
data as well as the description and quantity of
parts. Always use genuine Eaton replacement
parts for guaranteed fit and performance.
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