Page 152 - publication

gruvlok installation and assembly

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152

FIG. 7011

Standard Coupling

2

Turn the gasket inside out and

slide the gasket completely

over one of the pipe ends. Turning

the gasket inside out will reduce

the stretching necessary to put

the gasket into position. Ideally,

approximately 75% of the pipe’s

gasket-sealing surface, (Dimension

A) should be visible when the

gasket is in proper position. This

will aid in step 4.

3

Lubricate the gasket sealing

lips. The use of Gruvlok

lubricants ensures compatibility

between the lubricant and the

gasket.

4

Pull the two pipes into contact

aligning the pipe ends.

CAUTION:

Be careful not to pinch fngers

during this step. Working your way around

the circumference of the pipe, fip the

gasket toward the pipe end so that the

proper side is facing out. The end of this

procedure will result in the gasket snapping

into place. Position the gasket centrally

between the grooves of the two pipe ends.

1

Inspect the pipe ends making

sure the criteria, in the

Gruvlok Large Diameter Pipe Roll

and Cut Groove Specifcations, are

met.

5

Lubricate the exterior surface

of the gasket. This helps pre-

vent pinching of the gasket during

assembly.

6

Secure the housings about the

pipes making sure the coupling

keys are engaged in the pipe end

grooves. Hint: For horizontal assem-

bly, place housing segment on top

of the pipe to support the weight

of the housing segment. Secure the

adjacent housing with an oval neck

track bolt and heavy hex nut and

then rotate the secured housings,

again balancing the weight of the

housings on the top of the pipe.

Continue this procedure for all

segments.

7

Firmly torque each bolt. The

specifed minimum torque for

each nut is 600 ft.-lbs. The speci-

fed maximum torque for each nut

is 800 ft.-lbs.

8

Installation of the Figure

7011 Standard Coupling is

completed.

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.

GL-2.10