In-house component · Copper tubing & tooling
Copper line and tool room,
under one roof.
The copper that carries the refrigerant — coil tube, hairpins, line sets — and the tools that make every other part: press tools, moulds, jigs and fixtures, cut and maintained in-house.
Two capabilities
The circuit,
and the tools that shape it.
Copper is the refrigerant circuit: the inner-grooved tube laced through the coils, the hairpins and return bends, the header manifold and the service-valve line set that connects indoor to outdoor unit.
Tooling is what makes the rest of the unit repeatable — the press tools behind every sheet-metal panel and the moulds behind every fascia. Ezentech keeps both capabilities in-house, which is why the dimensions on the sheet stay in Ezentech's control.
- Evaporator tube, inner-grooved
- 7 mm
- Condenser tube, inner-grooved
- 5 mm
- Liquid line, service valve
- 6.35 mm
- Gas line, by capacity
- 9.52–15.88 mm
What the line and the tool room do
04 capabilities
- Coil tube
- Inner-grooved copper tube cut, bent into hairpins and expanded into the fin pack on the coil line.
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- Refrigerant line sets
- Liquid and gas lines at the service-valve sizes printed on each sheet — 6.35 mm liquid; 9.52, 12.7 or 15.88 mm gas by capacity.
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- Press tools and dies
- The blanking, punching and forming tools behind every sheet-metal cabinet and chassis part.
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- Moulds and fixtures
- Injection moulds for fascias and plastic parts, plus the jigs and fixtures the assembly line runs on.
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On the line
From tube stock
to charged circuit.
Process
05 steps
Cutting
Copper tube is cut to length for hairpins, return bends, manifolds and line sets.Hairpins and bends
Tube is bent into the hairpins and U-bends that thread the coil rows.End forming
Tube ends are expanded, flared or reduced to suit brazed joints and service valves.Brazing
Return bends, manifolds and connections are brazed to close the circuit.Line-set assembly and leak test
Line sets are assembled to the units and every circuit is pressure-tested before R32 charging.
From the sheet
The numbers,
as printed.
Sheet-verified values only — nothing rounded, nothing added. Every figure links back to the full specification page.
| Parameter | Value |
|---|---|
| Coil tube | |
| Evaporator tube outside dia. | 7mm and IGTmm |
| Condenser tube outside dia. | 5mm and IGTmm |
| Refrigerant pipe (service valve) | |
| Liquid side | 6.35mm |
| Gas side — 12K 3★ | 9.52mm |
| Gas side — 17K 3★, 17K 5★, 18K 3★, 18K 5★, 22K window | 12.7mm |
| Gas side — 22K 3★ | 15.88mm |
Values as printed on the manufacturer specification sheet; the 18K window sheet lists refrigerant pipe sizes as NA. See every model.
Buyer questions
Before you
write the RFQ.
Frequently asked
03 questions
What refrigerant pipe sizes do Ezentech split units use?
A 6.35 mm liquid line on every split model, with a 9.52 mm gas line on the 12K, 12.7 mm on the 17K and 18K, and 15.88 mm on the 22K split, as printed on the specification sheets.
What does the tool room make?
Press tools and dies for sheet-metal parts, injection moulds for fascias and plastic components, and the jigs and fixtures used on the assembly lines — plus their maintenance and refurbishment.
Is copper tube supplied as a component to other manufacturers?
Copper tubing and line-set fabrication primarily feed Ezentech's own units. Component supply for a partner programme is discussed case by case in the RFQ.
Planning a programme that needs copper tubing? Send the requirement — capacity, volume, chassis — and we will come back with a production plan.
Start the conversation
Let’s build
your next range.
From spec to shipped — send us your requirement and get a structured, engineering-backed quote.
OEM / ODM · Private label · Contract manufacturing