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gruvlok installation and assembly
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FIG. 7042
Outlet Coupling
These instructions are based on pipe grooved in accordance with Gruvlok®
grooving specifcations. Check pipe ends for proper groove dimensions and
to assure that the pipe ends are free of indentations and projections which
would prevent proper sealing.
ALWAYS USE A GRUVLOK LUBRICANT FOR PROPER COUPLING
ASSEMBLY. Thorough lubrication of the gasket is essential to prevent
pinching and possible damage to the gasket.
1Check & lubricate
gasket— Check gasket to
be sure it is compatible for the
intended service. Apply a thin
coating of Gruvlok lubricant to
outside and sealing lips of the
gasket. Be careful that foreign
particles do not adhere to
lubricated surfaces.
2Gasket
Installation— Slip
the gasket over one pipe end
making sure the pipe abuts the
gasket’s center ribs.
3Alignment— Align the
pipe ends and pull the pipe into
the gasket until the center ribs are in
contact with the pipe ends. The
gasket should not extend into the
groove on either pipe. Rotate the
gasket to align the outlet of the
gasket to the same direction as the
branch outlet.
4Housing Assembly—
With one nut and bolt
removed and the other loosened,
place one side of the housing over
the gasket. Make sure the ribs on
the outside of the gasket align with
the recesses in the housing and
the keys in the housing are in the
grooves on both pipes. Swing the
other housing over the gasket and
into the grooves on both sides of
the pipe. Make sure the recess in
the outlet of the housing is properly
aligned with gasket outlet.
5Tighten Nuts—
Re-insert the bolt and run-up
both nuts fnger tight. Securely
tighten the nuts alternately and
equally until they are completely
tightened and there is no gap
between the bolt pads. Continue
tightening the nuts alternately and
equally until the specifed bolt
torque is reached.
CAUTION: Make sure the ribs on
the exterior of the gasket are
enclosed in the housing recesses.
6Assembly is complete
FIG. 7042 – SPECIFIED BOLT TORQUE
Specifed bolt torque is for the oval neck track bolts used on Gruvlok®
couplings and fanges. The nuts must be tightened alternately and
evenly until fully tightened. Caution: Use of an impact wrench is not
recommended because the torque output can vary signifcantly due to
many variables including
air pressure supply, battery
strength and operational
variations.
CAUTION: 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. Pipe joint
separation may result in signifcant
property damage and serious injury.
* Non-lubricated bolt torques.
ANSI SPECIFIED BOLT TORQUE
Coupling
Size
Bolt
Size
Wrench
Size
Specifed
Bolt Torque *
In. In. In. Ft.-Lbs.
11/ 2 3/ 8 x 21/ 8 11/ 16 30-45
2 3/ 8 x 21/ 2 11/ 16 30-45
21/ 2 1/ 2 x 23/ 8 7/ 8 80-100
3 1/ 2 x 3 7/ 8 80-100
4 5/ 8 x 31/ 2 11/16 100-130
6 5/ 8 x 31/ 2 11/16 100-130
GL-2.10