Cooling coil specification 

Wall thickness of copper pipe 

(mm) 

Hole spacing 

(mm)

Row spacing

(mm)

Φ16

0.5/0.75

38.1

33

Φ12.7

0.35/0.5/0.75

31.75/35

27.5/35

Φ9.52

0.3/0.35/0.5

25/25.4

21.65/22

Φ7.94

0.35

22

19.05

Φ7

0.35

21

12.7

Item

 Cooling coil  Type

Operation medium

Operation pressure

(MPa)

Application

1

Φ16/Φ9.52/Φ12.7

Copper tube with aluminium fin

Cold/hot water

≤1.6

Used for combined air handling unit, fan coil etc air conditioning devices

2

Φ18/Φ20

Steel pipe winding with steel sheet

Steam

≤0.2

Used for combined air handling unit, fan coil etc air conditioning devices

3

Φ16/Φ9.52/Φ12.7

Copper tube with aluminium fin

Brine

≤1.6

Used for heat transfer in cold storage and all kinds of low temperature systems

4

Φ9.52/Φ7.94/Φ7

Copper tube with aluminium fin

Ethylene glycol

≤1.6

Used of energy recovery and low temperature system devices

5

Φ16

Copper tube with aluminium fin

Ice mud

≤1.6

Used for dry operation condition, fresh air dehumidification etc systems

6

Φ9.52/Φ7.94/Φ7

Copper tube with aluminium fin

R22

≤1.9

Used for industry and commerce air conditioning system

7

Φ9.52/Φ7.94/Φ7

Copper tube with aluminium fin

R407C

≤1.9

Used for industry and commerce air conditioning system

8

Φ9.52/Φ7.94/Φ7

Copper tube with aluminium fin

R134a

≤3.1

Used for vehicle and vessel etc transportation devices