One-Lok DI Pipe

SIGMA One-Lok is a mechanical joint restraining gland that implements a series of individually activated lugs that locate around the circumference of ductile iron pipe. When the lug-stem assembly is tightened down onto the pipe, the teeth (edges) on the bottom of each lug lock onto the pipe wall. Pipe thrust causes the primary contact edge to "grab" and restrain the pipe surface. Our unique "cam action" design allows the One-Lok to increase its restraining capabilities under increased line pressures or surges. Under both normal operating circumstances and high-pressure surges, One-Lok restrainers provide full deflection of the mechanical joint.

Sigma Corporation, 700 Goldman Drive, Cream Ridge, NJ 08514. Tel: 800-999-2550; Fax: 609-758-1158.