Page 154 - publication

gruvlok installation and assembly

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154

FIG. 7000

Lightweight Flexible Coupling

1

Check & 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.

2

Gasket Installation—

Slip the

gasket over the pipe end, making sure the

gasket lip does not overhang the pipe end.

3

Alignment—

After aligning the two

pipe ends together, pull the gasket into

position, centering it between the grooves on

each pipe. Gasket should not extend into the

groove on either pipe.

4

Housings—

With one nut unthreaded

to the end of the bolt, unthread the other

nut completely and swing the coupling housing

halves over the gasket, making sure the housing

keys engage the grooves. Insert the bolt and

turn the nuts fnger tight.

5

Tighten Nuts—

Tighten the nuts

alternately and equally to the specifed bolt

torque. The housing bolt pads must make metal-

to-metal contact.

CAUTION:

Uneven tightening may cause the gasket to pinch.

6

Assembly is complete—

Visually inspect the pipe joint to assure the

coupling keys are fully engaged in the pipe

grooves and the bolt pads are in frm even metal-

to-metal contact on both sides of the coupling.

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.

NOTE:

VdS - Roll Grooving Approval Specifcations, see the Technical Data/Installation Instructions section on Anvil’s web site - www.anvilintl.com

GL-2.10