I-751.Europe / European Alarm Check Valve Stations / Installation, Maintenance, and Testing Manual
6a. For the 8-inch/DN200 Size Only: Verify that the seal ring is
installed in the new clapper seal properly, as shown above. The
smaller diameter of the seal ring must be installed toward the
sealing surface of the clapper seal. Proceed to step 7.
7. For the 8-inch/DN200 Size Only: Verify that the seal washer is
inserted completely underneath the sealing lip of the gasket.
CAUTION
• DO NOT use solvents or abrasives on or near the valve body seat
ring.
• Use only Victaulic-supplied replacement parts.
Failure to follow these instructions could cause improper valve
operation, resulting in property damage.
8.
Remove any debris from the clapper. Inspect the clapper for
damage that may affect the sealing capabilities of the clapper seal.
Clean out any holes that are plugged in the valve body seat ring.
DO NOT USE SOLVENTS OR ABRASIVES. If the clapper requires
replacement, contact Victaulic and follow the “Removing and
Replacing the Clapper Assembly (All Sizes)” instructions on the
following page.
9. Install the clapper seal into the clapper carefully.
FOR THE 8-INCH/DN200 SIZE: Verify that the seal ring snaps
into the clapper completely.
10. Place the seal retaining ring (flat side down) onto the clapper
assembly, as shown above.
11. Install the self-sealing screw through the seal retaining ring and
clapper. Tighten the self-sealing screw to the torque value listed in
the table below to ensure a proper seal.
REQUIRED SELF-SEALING SCREW TORQUES FOR 3 – 6-INCH/
DN80 – DN150 AND 165.1-MM SIZES
Nominal
inches
DN
Actual Outside
Diameter
inches
mm
Required Torque
inch-lbs
N•m
3 - 6 3.500 - 6.625 75
DN80 - DN150 88.9 - 168.3 8
6.500 75
165.1 8
REQUIRED SELF-SEALING SCREW TORQUES FOR 3-INCH/DN80
AND 8-INCH/DN200 SIZES
Nominal
inches
DN
Actual Outside
Diameter
inches
mm
Required Torque
inch-lbs
N•m
8 8.625 160
DN200 219.1 18
12.
Re-install the cover plate by following the “Installing the Cover
Plate Gasket and Cover Plate” instructions on page 25.
I-751.Europe_23 REV_G
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