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7800 Check Valve Installation with Rigidlok Coupling.
Check the gasket to be sure it is compatible for the intended service.
Apply a thin coat of Gruvlok lubricant to the outside and sealing lips of the gasket.
Once lubricated, slip the gasket over one end of the pipe, making sure the gasket is
the flow matches the arrow on the valve body. After aligning the check valve with the pipe
end, pull the gasket into position, centering it with the grooves on the valve and pipe.
Securely tighten the nuts alternately and equally to the specified bolt torque, keeping
the coupling keys are fully engaged in the pipe grooves.
The bolt pads are to have equal gaps on each side of the coupling.