Encapsulation collars for repair of pipe sockets and walls

Hydro Stop, Hydro Fast and Hydro Smart encapsulation collars are ideal for safe and permanent repair under pressure.

Encapsulation collars are used for safe and permanent repair of all types of pipes and pipe connections while the pipeline is under pressure. Hydro-Cos, our new member of the AVK Group, has developed a wide range of universal and dedicated collars for the repair of pipe sockets and pipe walls, and can also offer completely customised solutions for any leak.

Renowned solutions for pipe repair

Hydro-Cos was established about thirty years ago in Apulia in Southern Italy, and specialises in manufacturing pipeline fittings. The Apulia region has always faced water problems because of its hydrogeologic characteristics, as soil permeability causes scarcity of surface water and consequently huge problems for agriculture. 

Hydro-Cos is a small family-owned business with strong dedication to help solve this problem. The company delivers high-quality repair collars for water loss prevention and has achieved deep know-how and a strong reputation within standard encapsulation collars and tailormade solutions to stop any leak. 

In 2020, Hydro-Cos became a member of the AVK Group, as its range of encapsulation collars and other fittings perfectly complements the AVK product range.

Design of encapsulation collars

The standard encapsulation collars are made of fabricated carbon steel with fusion bonded epoxy coating, and the coating as well as the rubber seals in contact with water are WRAS approved. 

They are designed with flange outlet suitable for hot tapping and drainage of water, and air vent for the release of air as the last step of the installation. Lifting eyes are integrated in the reinforcing plates. 

In addition to the substantial standard range of up to DN2000, the collars can be delivered with stainless steel body and/or stainless steel fasteners, for higher pressure ratings, up to DN3000, and even in a customised design.

Hydro Stop universal encapsulation collars for repair of pipe sockets and pipe walls 

Hydro Stop universal encapsulation collars are wide tolerance collars suitable for connecting pipes of different pipe materials, and they are available in variants designed for pipe socket repair as well as for pipe wall repair. 

  • Hydro Stop socket encapsulation collars with shaped body accommodate and seal any kind of pipe socket, including joints connecting two pipes of different materials and remnants of previous repairs. For more details: AVK series 8001/0.
  • Hydro Stop pipe encapsulation collars with straight body accommodate and seal leakage on pipe walls. They are lighter than the socket collars. For more details: AVK series 8001/2.

Hydro Stop universal collars

Both types offer 30 mm tolerance on the outside pipe diameter up to DN450 and 40 mm from DN500. The wide tolerance gives great flexibility, if the pipe OD has not been measured correctly, and a safe installation even in case of oval or damaged pipes. They allow for angular deflection of up to ±4° before or after installation.

Hydro Fast dedicated encapsulation collars for socket/pipe repair

Hydro Fast encapsulation collars have a tolerance of up to 10 mm on the outside pipe diameter and they are dedicated to a specific pipe material. Variants are available for all pipe materials and for both pipe socket repair and pipe wall repair.

  • Hydro Fast socket encapsulation collars with shaped body accommodate and seal pipe sockets connecting two pipes of the same material. For more details: AVK series 8002/0.
  • Hydro Fast pipe encapsulation collars with straight body accommodate and seal slightly misaligned breaks on pipe walls. For more details: AVK series 8002/2.

Hydro Fast dedicated collars

The lightweight compact design is ideal for fragile pipes and limited space on site, and they allow for angular deflection of up to ±6° before or after installation offering great flexibility.

Hydro Smart dedicated socket encapsulation collars for small pipe diameters

Hydro Smart socket encapsulation collars have a shaped body designed to accommodate pipe sockets connecting two pipes of the same material. They can be installed by one operator, which is advantageous where space is limited.

They do not have the flanged outlet, but otherwise they are quite similar to Hydro Fast collars. For more details: AVK series 8003/0.

Hydro Smart dedicated socket collars for small pipe diameters

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Encapsulation collars

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Encapsulation collars

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