Capillary Tube Manufacturer,Supplier and Exporter in India
Product Code : EL-MWLE-13073
Jlab Export is a leading Capillary Tube Manufacturer,and suppliers in India
In small refrigeration systems such as domestic refrigerators, freezers and water coolers, a copper capillary tube is the fixed expansion device between the filter drier and the evaporator. Its bore and length set how much refrigerant flows. This copper tube comes in 100 ft lengths with bores of 0.036 in, 0.031 in and 0.028 in.
Specifications
| Material | Copper |
| Bores (I.D.) | 0.036 in, 0.031 in, 0.028 in |
| Length per size | 100 ft |
| Minimum order quantity | 50 units |
| Dispatch time | Usually 3–5 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Capillary Tube Practicals in the RAC Lab
Replacing a blocked capillary is a standard exercise on a domestic refrigerator circuit. Students measure the bore of the old tube with the Capillary Tube Gauge. They cut a new length of the same bore with the Capillary Tube Cutter, which parts the tube without closing the bore. The new tube is then brazed into a fresh Filter Drier and into the evaporator inlet.
To show how bore and length control flow, teachers fit two capillaries of different bore to the same circuit in turn. Students read the suction pressure on the Hydrocarbon Manifold Gauges and see that the narrower tube gives a lower evaporator pressure.
Frequently Asked Questions
How do bore and length change the flow?
A narrower bore or a longer tube adds restriction, so less refrigerant passes and the evaporator runs colder at a lower pressure. A wider bore or a shorter tube lets more through, which is why a replacement must match the old tube.
Which bore do I need?
Fit the same bore and length as the tube being replaced, or the size the cabinet or compressor maker gives. This tube comes in 0.036 in, 0.031 in and 0.028 in bores, each in a 100 ft length.
How do I cut a capillary without blocking it?
Use a capillary tube cutter, or score the tube lightly with a file and snap it. Side cutters and pliers crush the end and close the bore. Check that the cut end is round and open before brazing.
How far should it go into the filter drier?
Push it in far enough for a sound joint, but keep the end clear of the strainer screen inside. Use a little filler and keep the heat short, because filler that runs into the bore will block it.
Why does a blocked capillary stop the cooling?
When ice from moisture, wax or debris blocks the bore, refrigerant cannot reach the evaporator. The evaporator warms up, the suction pressure falls very low and the compressor runs without cooling the cabinet.
Other Refrigeration Tube Tools
- Pinch-Off Plier (pinches and locks copper tubing)
- Drier (commercial filter drier)
- Spring Tube Bender (for thin wall copper tube)
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Last updated: 5 November 2026
