solar vacuum tubes for solar system - from 1.2m to 2.1m

1.widely used for solar water heater, 2.ensure operation in winter, 3.15 years' warranty for tube - more info check here: http://www.sourcingappliances.com/solar-vacuum-tubes-for-solar-system-11140308/

Quick Brief

Type: Solar Water Heater Parts Place of Origin: Zhejiang China (Mainland) Brand Name: three-cavity all-glass evacuated so... Model Number: from 1.2m to 2.1m Type: Tri-element Hitech vacuum tube External pipe diameter: 47 or 58 or 70 Internal pipe diameter: 37 or 47or 58 Pressure-endure: 0.6MPa Sediment method: Three Targets magnetron sputte... Absorptivity: 0.93-0.96 Emittance: <=6.0%(75-80?) Stagnation parameter: 240~260 Average heat loss: <=0.6 coating material: CU/SS-AIN(H)/SS-AIN(L)

Product Features:

1.widely used for solar water heater

2.ensure operation in winter

3.15 years' warranty for tube

Business Terms:

Port: shanghai/ningbo

Minimum Order Quantity: 300 Piece/Pieces

Supply Ability: 15,000,000 Piece/Pieces per Year

Payment Terms: L/C,T/T

Contact Supplier

Specifications and Product Details:

Tube structure	Borosilicate 3.3 glass
External pipe diameter and thickness	Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=1.6mm Φ=70±0.7mm &=1.6mm
Internal pipe diameter and thickness	Φ=37±0.7mm &=1.6mm Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=1.6mm
Tube lenghth	from 1.2 to 2.1
Sediment method	Three Targets magnetron sputtering plating
Absorptivity	0.93-0.96
Emittance	<=6.0%(75-80°C)
Stagnation parameter	240~260
Average heat loss	<=0.6

Three-target all-glass vacuum tube has property and spec. as following:

1. All-glass double-tube co-axial structure, high borosilicate 3.3 glass ;

2. Transmission Ratio of the Outer Glass Tube;

3. Structure: Cu/SS-ALN(H)/SS-ALN(L)/ALN.

4. Sediment method: 3 target magnertron sputtering plating ;

Comparing to Al-N-Al vacuum tube, it has advantages in cold area as following:

a. Absorbance: 12% higher.

b. Emission Ration: 30-49% lower.

c. In alpine area, copper ions emission ration is lower than that of aluminum ion. So it could work properly even circumstance temp. is lower than -30Deg C.

d. Stainless steel ion has performance of high temp. resistant, anti-stagnation temp. coating will not decay or get aging or disappears.

Dia. 47 with length of 1500mm.

Dia. 58 with length of 1500mm.

Dia. 58 with length of 1600mm.