Pneumatic fitting

socketflexible

The AMERICAN Lok-Ring joint is a restrained joint that utilizes the sealing features of the time-proven AMERICAN Fastite joint. It is an essentially boltless, flexible restrained connection that provides an easily assembled positive restraint against endwise separation due to thrust resulting from internal pressure or external forces. Only a minimal amount of time is required to complete the Lok-Ring assembly, or disassembly if necessary. The patented1 AMERICAN Lok-Ring joint is designed for working pressures up to 250 psi for sizes 54" through 64". If higher pressure ratings are needed, contact AMERICAN. The Lok-Ring joint can be used with any lesser pressure class of ductile iron pipe, with the maximum operating pressure rating of the joint limited in such cases to that of the pipe. An alloy steel welded-on retainer ring and a split lok-ring, assembled behind the retainer ring, provide the means of restraint. The split lok-ring is held “snug” and constricted against the pipe OD for assembly of the AMERICAN Fastite portion of the joint. After the plain end of the pipe is assembled into the Lok-Ring bell, the lok-ring is released, permitting it to expand. The lok-ring is thus securely positioned behind the welded-on retainer ring and in the socket locking groove on the ID of the Lok-Ring bell. This locks the joint.