Iris Stop Equipment

Iris-Stop is a method of carrying out flowstopping operation to facilitate maintenance or repair to distribution networks, whilst maintaining continuity of supply. Iris Stop is a technique for safe and reliable flowstopping of 100-1,200 mm (4”-48”) diameter live gas mains operating at pressures up to 2.0 bar (30 psi). The system has been proven in regular use for more than 30 years.

Iris Stop Equipment

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Iris-Stop is a method of carrying out flowstopping operation to facilitate maintenance or repair to distribution networks, whilst maintaining continuity of supply. Iris Stop is a technique for safe and reliable flowstopping of 100-1,200 mm (4”-48”) diameter live gas mains operating at pressures up to 2.0 bar (30 psi). The system has been proven in regular use for more than 30 years.

  • Iris Stop
    Iris-Stop is a method of carrying out flowstopping operation to facilitate maintenance or repair to distribution networks, whilst maintaining continuity of supply.
  • Iris Stop Primary Bag GIS/E19
    GIS/E19 bags have been special designed for working in conjunction with the ALH IRIS stop equipment and the primary bag and have been successfully been used for over 30 years.
  • GIS/E20 Bags - Iris Stop Secondary Bag
    GIS/E20 bags have been special designed for working in conjunction with the ALH IRIS stop equipment as the secondary or safety bag.
  • System 3 Drilling Machine (Hydraulic)
    ALH System 3 drilling machine with hydraulic motor offers total gas free drilling in live mains
  • System 3 Drill & Tap (Pneumatic)
    The ALH System 3 has a two-stage air motor for high speed drilling and low speed tapping.
  • Non Tap Plugs
    A full range of non-tap-plugs from 2”-6” with the advantage of easy and guaranteed extraction due to the unique two flat design feature. Non-tap-plugs provide a simple and effective alternative to screwed plugs.

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