Cutting Ring Fitting

Minimum tube length for short tube segments:

• Note minimum lengths specified in table below.

Minimum distance to bends:

• Note minimum lengths specified in table below.

Cutting the tube:

• Cut in 90 ° angle.
• Angle tolerance of 0.5 ° is tolerable!

Cutting the tube:

• Use saw.
• Grinders or Tube Cutters are not permitted!

Translation for table:

Baureihe = Series
AD = Outer diameter of tube

• Deburr tube inside and outside.

Note: Do not slant the tube wall! Slightly rounded corner up to 0.2 mm x 45 ° is tolerable.

• Tubes with thin walls and soft tubes require reinforcement sleeve.

Further information is provided in table Assembly with supporting Sleeves

• Slide nut and cutting ring onto tube.

• Apply lubricant on threading of swivel nut and cutting ring.

• Insert assembly cone and plate into the preparation machine.
• Apply lubrication to the preassembly cone before every preassembly.

Caution: periodically (after approx. every 50 usages) check assembly cone for wear and tear!

Caution: Read documentation of the preassembly machine before usage!

• Adjust pressure according to the tube diameter.
• Insert prepared tube into the machine.

• Firmly insert pipe.
• Press "START" button.
• Firmly insert pipe until machine is finished with the preassembly.

• After preassembly with preassembly machine: check tube end for correct ridge on the tube.

Please Note: The cutting ring can be turned but it cannot slide up and down the tube when it is correctly installed!

• Fasten assembly cone in vice
• Apply lubrication on cone and cone threading before every preassembly.

Notice: periodically (after approx. every 50 usages) check assembly cone for wear and tear!

• Insert tube with cutting ring and swivel nut into the preassembly cone.
  Caution: push tube into the fitting all the way, otherwise the tube connection might leak!
• Tighten swivel nut by hand.
• For control of the according rotations of the nut: mark nut.

• Tighten swivel nut with spanner approx. 1 1/4 rotations.
• Caution: The tube itself may not be turned!
• Loosen swivel nut.

• After preassembly with preassembly cone: check tube end for correct ridge on the tube.

Please Note: The cutting ring can be turned but it cannot slide up and down the tube when it is correctly installed!

• Apply lubrication on the fitting (threading and cone).

• Insert tube with cutting ring and swivel nut into the fitting.
• Caution: push tube into the fitting all the way, otherwise the tube connection might leak!
• Tighten swivel nut by hand.
• For control of the according rotations of the nut: mark nut.

• Tighten swivel nut with spanner approx. 1 1/2 rotations. Hold fitting with spanner.
  Caution: The tube itself may not be turned!
• Loosen swivel nut.

After preassembly with preassembly machine: check tube end for correct ridge on the tube.
Please Note: The cutting ring can be turned but it cannot slide up and down the tube when it is correctly installed!

Caution:

• Pre-assembly of steel tubes directly in the fitting is only reccomended for exceptions.
• Pre-assembly of stainless steel tubes directly in the fitting is not permitted.

• Always apply lubrication on nut and cutting ring with stainless steel fittings and steel fittings starting with 20 mm tube diameter.
• Insert preassembled tube with cutting ring and swivel nut into the fitting.

• Hold fitting with spanner.
• Tighten swivel nut with spanner approx. 1/4 to 1/3 rotations beyond sharp increase of force.

• The installation of the fitting with welding nipple is completed.

• The swivel nut is tightened without increased force when the installation is repeated.