Assembly instructions for metal hose connectors

1. Pipe preparation
• The cut at the end of the pipe must be flat, and the angle tolerance is allowed within 0.5 degrees.
• Remove burrs from the inner and outer edges. Clean the tubing and remove chips.
• Do not use a pipe cutter or cutting grinder.
• The straight length of the pipe must be at least twice the height of the nut.
2. Use pre-installed tools for assembly
2.1 Preparation
• Fix the pre-installed stud corresponding to the pipe diameter with a vise.
•Coat the following parts with ASW grease:
-Taper angle and thread of pre-assembled studs
- card cover
-Thread of the nut
2.2. Pre-installed
• Slide the coupling nut and ferrule into the end of the tube, and bring the cutting edge of the ferrule close to the end of the tube. Please make sure that the position of the card sleeve is correct to avoid wrong installation.
• Turn the connecting nut on the pre-installed stud as much as possible by hand, so that the clamping sleeve is fixed between the pipe and the nut.
• Push the pipe directly to the locking piece in the nut. If the pipe is not docked with the locking piece, the pipe cutting is invalid.
If the material of the pipe is ideal, it can be pushed to the locking member without difficulty. On the contrary, please check whether the end of the pipe is deformed or the surface is uneven.
(Please refer to the recommended tubing in the adapter appendix).
• Use the appropriate wrench to tighten the nut and make a large rotation.
Make one turn
2.3. Check
• To check the cutting effect of the ferrule, loosen the nut. You should be able to see the raised collar on the pipe (refer to the picture). If not, it needs to be tightened again (reassembly).
2.4. Final assembly
• Remove the pre-installed tubing from the pre-installed stud and insert the lubricated metal hose connector. The thread and cone of the connector should be lubricated before installation.
• Finally tighten the nut approximately ½ turn and the assembly is complete.
Turn about 1/2 turn
3. Assembly without pre-installed studs
• Prepare tubing (reference 1) and apply grease (reference 2.1) as described above.
• Tighten the nut approximately 1 ¼ to 1 ½ turns to complete the assembly in one step.
• Check the cut-in effect as described in 2.3 above.
Note: According to DIN 3859-2, it is recommended to use hardened steel pre-assembly tools to pre-assemble stainless steel joints.
note! The deviation of the number of tightening turns will reduce the nominal pressure and service life of the joint, resulting in leakage or other failures.
Turn about 1 1/4 to 1 1/2 turns
4. Assembly with reinforced sleeve
When using thin-walled pipes or flexible pipes, in order to ensure the correct function of the joint, it is recommended to use EXMAR reinforced sleeves.
Reinforced sleeve assembly
No special tools are required to assemble the reinforcement ring.
1. The outer front end of the bush has a convex edge. Insert the reinforced sleeve into the pipe by hand until it reaches the flange.
2. A rubber hammer or mallet should be used to gently tap the reinforced sleeve into the mouth of the pipe; this way it can be pressed against the convex ring without tilting the pipe.
3. Refer to 2 or 3 for assembly of the connector.
Ordering information: When ordering the reinforced sleeve, please provide information such as the outer diameter of the pipe and the thickness of the pipe wall.
The specifications of pipes that require the use of reinforced sleeves are described in "Recommended Pipes".

Notes on pre-installed tools
Even pre-assembled tools that have been material-strengthened will wear out.
The accuracy and tolerance of the cone angle must be checked regularly (after every 50 pre-installations). If it is severely worn and does not meet the standard, the pre-installed tool should be replaced.