1,strucure:    all-glass double-tube co-axial structure

2,glass material:  high borosilicate 3.3glass

3,extermal pipe diameter and thickness:  Φ47+/-0.7mm 1.6mm   Φ58+/-0.7mm 2mm

4.internal pipe diameter and thickness: Φ37+/-0.7mm 1.6mm 

Φ47+/-0.7mm 1.6mm

5,pipe length: 1200(+/-5mm)  1500(+/-5mm)  1700-1800(+/-5mm)

6,strucure:  AL-N/AL(AL-N/AL selective absorptive coating)

7,sediment method: direct-current reaction splash-jetting

8,specific absorption: s090-0.94

9,emission ratio:

10,vacuum tightness: P≤2*10-3(Pa)

11,ldle sunning property parameters: 250C/KW

12,Immersed sunning auxiliary volume: 2.8MJ/

13,average heat loss coefficient:  Ult 0.6W(.)

14,life:   15 years