Structure and Principle: The heat pipe is hollow with the space inside evacuated, much the same as the solar tube.

Freeze Protection: Because the heat pipe is located within the evacuated glass tube, brief overnight temperatures as low as -20^oC (14^oF) will not cause the heat pipe to freeze.

⊙ High heat conduction coefficient:is 2000-5000 times of matal materials.
⊙ High quantity of heat conduction:is 1000times od metal materials.
⊙ Low temperature difference:less than 4℃ difference in 2 meter long pip

◆  Specifications:

Manifold casing material	Aluminum
Frame material	Aluminum
Header pipe material	1.2mm thickness Copper
Heat pipe material	0.7mm thickness Copper
Insulation	Polyurethane 55mm  or  Rock wool
Rubber seals and rings	UV stabilized high temperature silicon rubber
Test pressure	9 bar
Collector mounting	Flat roof/inclined roof
Mounting angle	15℃-50℃
Inlet Outlet	3/4”

MODEL	Ligthing (m2)	Heat pipe			Supply hot water(L/ ℃ )	20/40" container	GW KG
		diameter	length	No.
SY-1500/47-12	1.26	Φ47mm	1500mm	12	70/60	133/276	28
SY-1500/47-20	2.10	Φ47mm	1500mm	20	125/60	110/227	46
SY-1500/47-30	3.15	Φ47mm	1500mm	30	180/60	76/158	69
SY-1800/58-12	1.73	Φ58mm	1800mm	12	110/60	118/244	40
SY-1800/58-18	2.59	Φ58mm	1800mm	18	150/60	84/175	58
SY-1800/58-20	2.88	Φ58mm	1800mm	20	175/60	77/160	64
SY-1800/58-24	3.46	Φ58mm	1800mm	24	220/60	64/133	79
SY-1800/58-30	4.32	Φ58mm	1800mm	30	260/60	52/106	98

Features:
* Reliable, efficient, twin-glass solar tubes heat pipe
* Copper heat pipes for rapid heat transfer
　- Low maintenance effort
　- Easy installation of single or multiple units
* Corrosion resistant silver brazed copper header

NOTE：Absorber area is the part of the collector that actively absorbs the light rays. For solar tubes this is defined as the cross-sectional area of the inner tube (selective coated) measured using the outside diameter. (Eg. 0.047 x 1.72m = 0.08m²)