1
GENERAL:
The Groth Model 8110 is a swing check
valve utilizing a single disk which allows
flow in one direction. In the event that
the downstream pressure is higher than
the inlet pressure, the higher ack
pressure will hold the disk in the closed
position. If u le tight shut-off is
required, an elastomer seat must e
specified.
INSTALLATION:
The Model 8110 must e installed
upright with its axis horizontal to achieve
the rated flow capacity with minimal
pressure drop. A tag on the valve ody
indicates flow direction and the upright
position. Proper orientation is also
important so the drain ports can e used
to remove condensation from the
housings.
Align and install adjacent piping so that
no undue stress is imposed on the valve
ody. Refer to ta les 1 & 2 for gasket
and olt torque recommendations.
Excessive olt torque may damage
aluminum flanges.
Table 1
Body Flange Gasket Di ensions
150#
ANSI
Flange
O.D. I.D. B.C. Hole Qty
10” RF 13.38” 10.80” --- --- ---
12” RF 16.12” 12.80” --- --- ---
10” FF 16.00” 10.00” 14.25” 1.00” 12
12” FF 19.00” 12.00” 17.00” 1.00” 12
* RF = Raised Face , FF = Flat Face
Table 2
Reco ended Mini u Torque Values
Size Qty
Holes
Bolt
(UNC)
Torque (lb-ft)
RF FF
10” 12 7/ 8” - 9 75 138
12” 12 7/ 8” - 9 93 179
*Note : Torque values are ased on gasket factors
m = 3.5, y = 4000 psi, operating pressure = 30 psi
Note: Flat face flanges require full
flange gaskets.
OPERATION:
The operation of the Model 8110 is fully
automatic. There are no adjustments
required.
MAINTENANCE:
The check valve does not require
routine lu rication. If servicing or
disassem ly is required, the valve must
e removed from the line. Num ers in[
] in this section refer to the item
identification in figure 1.
SAFETY WARNINGS
Properly block and vent the line before
removin the valve. Observe all plant
procedures and Material Safety Data Sheet
recommendations for the products in the
system when removin and disassemblin
the valve.
Support the valve vertically on a ench
with the flow direction upward. Remove
the studs and hex nuts [2 & 3] and lift
the downstream housing [1] from the
valve. Remove the gasket [7] and the
seat/disk su -assem ly.
Inspect the seat [6] and the disk [5].
Both seating surfaces must e clean
and flat. If it is necessary to lap the
seat, remove the olts [9], nuts [10] and
teflon washer [11] that attach the swing
assem ly. Clean the valve and replace
all worn or damaged components efore
reassem ly. Check the disk and link to
e sure they are free to swing and that
seating is uniform. Align seat ring with
locating pins in upstream housing.
Reassem le in the reverse order of
disassem ly.
