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gruvlok installation and assembly
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4Stretch the Gruvlok gasket around the pipe
end and then press the gasket into the
cavity between the pipe O.D. and the fange.
The gasket must be properly positioned as
shown in the fgure below.
5With the gasket in place apply lubricant
to the exposed gasket tip, which will seal
on the mating fange. Tighten the nuts on the
latch bolts alternately to the specifed latch
bolt torque. The fange housings must be in
frm metal-to-metal contact.
6Verify that the mating fange face is hard,
fat and smooth, free of indentations, which
would prevent proper sealing of the Gruvlok
Flange gasket. Assure the gasket is still in the
proper position and align Gruvlok Flange bolt
holes with the mating fange, pump, tank, etc.,
bolt holes.
FIG. 7012
Gruvlok Flange (2"–12")
7Insert a fange bolt or stud with material
properties of SAE J429 Grade 5 or higher
through the bolt holes and thread a nut on
hand tight. Continue this procedure until all
bolt holes have been ftted. Tighten the nuts
alternately and evenly so the fange faces
remain parallel. All the bolts or studs must be
torqued to the mating fange bolts specifed
torque. The fange faces should have metal-to-
metal contact.
It is important to line up the bolt
holes before bringing the two fanges
together. Sliding the fanges into
place will dislodge the gasket and cause leakage to occur.
When using a fange insert, it is important that the insert is
properly aligned with the gasket prior to tightening the bolts.
NOTE: The Gruvlok Fig. 7012 Flange requires the use of a Flange Adapter Insert when
used against rubber surfaces (Figure C1), serrated fange surfaces or mating fanges
with inserts (Figure C2). The
Flange Adapter Insert will be exposed
to the fuids in the system. Ensure that
the Insert is compatible with the fuids
in the systems and with adjacent piping
components.
Do not use a
steel Flange
Adapter Insert
in copper systems or in systems where
galvanic corrosion is possible.
CAUTION: Proper torquing of fange 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.
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.
NOTE: VdS - Roll Grooving Approval Specifcations, see the Technical Data/Installation Instructions
section on Anvil’s web site - www.anvilintl.com
Fig. C1 Fig. C2
GL-2.10