ONE-LOK™ SERIES SLC FOR PVC PIPE

SIGMA ONE-LOK is a mechanical joint, wedge-action restraining gland that implements a series of individually activated wedges that locate around the circumference of PVC pressure pipe. When the wedge-stem assembly is tightened down onto the pipe, the teeth (edges) on the bottom of each wedge lock onto the pipe wall. Pressure thrust causes the primary contact edges to grip the pipe surface and properly restrain all classifications of AWWA C-900/C-905 CIOD or ASTM D2241 IPS pipe.

Contoured wedges provide proper contact and full support of the PVC pipe wall. Each wedge is manufactured with a wide arc or contour that evenly matches the curvature for each nominal classification of AWWA C-900/905 or IPS Pipe. In addition to providing a more secure grip, ONE-LOK’s elongated wedges eliminate concerns of pipe wall damage. A break off wedge stem assembly that provides the installer Two “visual torque indicators”. A breakaway top bolt (1) and wedge stem shoulder stop (2) eliminate any guesswork at the installation site, unlike ordinary bolted assemblies. The ONE-LOK twist-off top is sized exactly to the standard T-bolt and nut dimension in the mechanical joint, so there are no additional tools required for installing ONE-LOK. After twist-off, the bolt stem provides a residual hex shank for easy removal in service and maintenance areas. Residual shank provides visual confirmation of bolt having activated the wedge on the pipe surface. A twist-off ABS Spacer (3) that allows the ONE-LOK to be used effectively on AWWA C-900/C-905 or ASTM D2241 IPS PVC pipes.