Return Bend Fitting Manufacturer,Supplier and Exporter in India
Product Code : EL-MWLE-13038
Jlab Export is a leading Return Bend Fitting Manufacturer,and suppliers in India
A return bend is a U-shaped copper fitting that turns a line back on itself through 180°. Coil builders use it to link the straight tubes of a condenser or evaporator, end to end, into one serpentine circuit. This bend is made in 6, 8 and 10 mm sizes for copper tube of the same outside diameter.
Specifications
| Shape | 180° return bend (U-bend) |
| Material | Copper |
| Sizes | 6, 8 and 10 mm |
| Minimum order quantity | 100 units |
| Dispatch time | Usually 3–5 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Coil-Building Practicals with Return Bends
Students can build a small serpentine coil on the bench. They cut straight lengths of Copper Pipe, clean the ends with an inner-outer Reamer and join each pair of tubes with a return bend. The joints are brazed with a Brazing Rod on the Gas Welding Plant, working round the coil in order so the heat does not loosen a finished joint.
The finished coil is filled with dry nitrogen from a Nitrogen Pressure Test Kit, and each bend is brushed with Bubble Solution For Leak Detection. Teachers can then compare it with a coil bent from one length on a Spring Tube Bender, to discuss why fewer joints mean fewer leak points.
Frequently Asked Questions
Why use a return bend instead of bending the tube?
A tight U bent by hand tends to flatten, and coil tubes sit close together. A return bend gives a short, round turn in a small space, at the cost of two brazed joints.
Which size do I order?
Order by the outside diameter of the tube it joins: 6, 8 or 10 mm. Check the tube with a caliper before ordering, as metric and inch tube are close in size but do not mix.
How do I avoid overheating the bend while brazing?
Heat the tube and fitting evenly and bring the joint to a dull red before feeding the rod. Too much heat in one spot thins the copper and lets the alloy run away from the joint.
How is a finished coil tested?
Pressurise it with dry nitrogen once it has cooled, then brush bubble solution on each joint and watch for growing bubbles. A gauge reading that stays steady over a set time also shows the coil is tight.
Other Fittings for Coils and Lines
- Elbow Fitting
- Distribution Fitting (feeds several coil circuits)
- Copper Pipe (10 and 12 mm rolls)
- Tee Fitting
For a quote, use Add To Cart or send us a message through the contact page.
Last updated: 5 November 2026
