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Stargrip® – Series 3100P

Wedge Action Restraint for Ductile Iron Pipe Bells - New Installations

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Wedge Action Restraint for Ductile Iron Pipe Bells – New Installations

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  • Stargrip® and split back-up rings are manufactured from Ductile Iron per ASTM A536, Grade 65-45-12.
  • Includes Stargrip® and Split Back-Up Ring (for sizes 3″-36″) or two Stargrips® for sizes 42″-48″ and high strength low alloy steel double ended rods and nuts which meet the requirements of ANSI/AWWA C111/A21.11
  • Minimum Safety Factor 2:1
  • For use on all classes of Ductile Iron Pipe (PC150 – PC350 and CL50 – CL56) — Stargrip® restraint pressure rating per table in the catalog.
  • For new pipe-to-pipe installations only
  • Pipe OD must be gauged overall to assure restraint will fit properly.
  • Please refer to chart in the catalog for maximum bell outside diameter for rod clearance.
  • Standard gland color is Black.

Restrainer mechanism shall be integrated into the design of the gland. As the mechanism is activated, multiple wedging action shall be imparted against the pipe increasing its resistance as internal pressure increases. After burial of the restraining mechanism, joint flexibility shall be maintained.

The actuating bolt shall be threaded into the restraining wedge and have a 1-1/4″ hex operating head. The restraining twist off head bolt system shall have a torque-limiting feature designed to break off at preset torque levels, thus insuring proper action of restraining device. Glands shall be manufactured of high strength ductile iron in accordance with ASTM A536 Grade 65-45-12 requirements. The wedge shall be manufactured of high strength ductile iron and be heat treated to a minimum hardness of 370 BHN.

The mechanical joint restraint mechanism shall have a maximum water working pressure of 350 PSI for sizes 3″-16″ and 250 PSI for sizes 18″ and above. All sizes shall have a minimum safety factor of 2:1 (i.e. twice the maximum pressure rating of the restraint). The restraint mechanism shall be Star® Pipe Products, Stargrip® series 3100P or an approved equal.

*Please refer to the catalog for further details and specifications.