The body of the HDT tapping machine is fitted with two quick-connects to connect the manometer and the drain valve used to extract the shavings caused by the drilling. It is also easy to make a hydraulic test before the drilling, using a pressure pump connected by means of the ½” M fitting of the HDT device.

The HDT hot tapping machine is available in two versions: the basic version and the version fitted with a manometer and a valve for the extraction of shavings.

The drill bit and the hole cutters are fastened to the shaft by means of couplings:

• ½’’ UNF for 1” and 1¼” Starrett hole cutters
• 5/8’’ UNF for 1½ ” and 2” Starrett hole cutters
• 15 for PE/PVC hole cutters for Polyethylene and PVC pipes

In connections of more than 1¼” and in networks of more than 5 bars pressure, we recommend keeping the same pressure of the network inside the tapping machine, to avoid a backward movement of the shaft after drilling the pipe.

When drilling with PE/PVC hole cutters, the balance between the network pressure and the pressure inside the tapping machine is achieved by a previous drilling of the pipe with the centre drill or with a pressure pump connected to the body of the drilling device.