Nordic wires insul white 15 14 13 10 12 Cu wires insul green Sensor wires NiCr insul red 4 3 7 1 12 11 10 9 6 85 2 X Version for domestic water pipes can be supplied with external thread 21 8 2014 FLEXWELL district heating cable FHK Subject to technical changes 5 315 Connector PN 25 Types 30 91 to 75 171 GR version 1 Note For pressure tests in a partially filled trench or with unsupported connectors max permitted pressure 0 5 bar overpressure Figure 1 Connector with graphite ring seal type GR Nominal widths pipe connection dimensions Detail X The FHK connector with the type GR graphite ring seal Figure 1 is specifically designed for use with FLEXWELL district heating cable for heating and domestic water pipes up to a dimension of DN 65 It is used to make all connections on pipe installations in buildings and shafts and for through type and T joints The monitoring wires pass through a watertight exit on the connector This connector can withstand loads of up to nominal pressure stage PN 251 at a maximum temperature of 150 C Structure 1 Compression ring 2 Support ring 3 Graphite sealing ring 4 Connecting piece 5 Panhead screw 6 Threaded cap 7 O ring 8 Washer 9 Clamp 10 Monitoring wires 11 Monitoring wires screwed connector 12 P TFE tube 13 Insulation 14 Comp ression joint 15 Shrink hose FHK type 30 91 39 116 60 148 75 171 Comparable nominal width DN 25 32 50 65 Pipe connection dimensions for hot water pipe mm 33 7 x 2 6 42 4 x 2 6 60 3 x 2 9 76 1 x 2 9 Pipe thread for domestic water pipe R 1 R 1 1 4 R 2 R 2 1 2

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