Page 156 - publication

gruvlok installation and assembly
www.anvilintl.com 156
Fig. 6400
Rigid Coupling
The Fig. 6400 Coupling from Gruvlok is specially
designed to provide a rigid pipe connection to
meet the specifc demands of copper tubing
installation. Fast and easy swing-over installation
of the rugged lightweight housing produces a
secure, rigid pipe joint. Available with the EPDM
fush gap style gasket as the standard gasket.
CAUTION: Uneven tightening may cause the
gasket to pinch. The gasket should not be visible
between segments after the bolts are tightened.
Proper torquing of coupling bolts is required to
obtain specifed performance. Over torquing
the bolts may result in damage to the bolt
and/or casting which could result in pipe joint
separation. Under torquing the bolts may result
in lower pressure retention capabilities, lower
bend load capabilities, joint leakage and pipe
joint separation.
Specified Bolt Torque
Bolt Size Wrench Size SpecifedBolt Torque*
In. In. Ft.-Lbs
3/ 8 11/ 16 30-45
1/ 2 7/ 8 30-45
5/ 8 11/ 16 60-90
* Non-lubricated bolt torques.
1check & Lubricate Gasket–
Check the gasket to be sure it is compatible
for the intended service. Apply a thin coating
of Gruvlok®Xtreme Lubricant to the entire
surface, both internal and external, of the
gasket. Be careful that foreign particles do
not adhere to the lubricated surfaces.
2 Gasket Installation– Slip the
gasket over one tube, making sure the
gasket lip does not overhang the tube end.
3 Alignment– After aligning the two
tube ends together, pull the gasket into
position, centering it between the grooves
on each tube. The gasket should not extend
into the groove on either tube or between
the tube ends.
4Housings– Remove one nut and bolt
and loosen the other nut. Place one
housing over the gasket, making sure the
housing keys ft into the tube grooves. Swing
the other housing over the gasket and into
the grooves on both tubes, making sure the
tongue and recess of each housing is
properly mated. Re-insert the bolt and
run-up both nuts fnger tight.
5Tighten Nuts– Securely tighten
nuts alternately and equally to the
specifed bolt torque, keeping the gaps at
the bolt pads evenly spaced. Assembly is
complete. Visually inspect the pipe joint to
assure the coupling keys are fully engaged in
the pipe grooves. The bolt pads are to have
equal gaps on each side of the coupling.
NOTE: Copper is a soft material, and in some
cases, the bolt pads may come close to
metal-to-metal contact.
CAUTION: Uneven tightening may cause the gasket to pinch. The gasket should not be visible between segments after the bolts are tightened. Proper torquing of coupling bolts is required to
obtain specifed performance. Over torquing the bolts may result in damage to the bolt and/or casting which could result in pipe joint separation. Under torquing the bolts may result in lower
pressure retention capabilities, lower bend load capabilities, joint leakage and pipe joint separation.
GL-2.10