Features:
High solar-thermal conversion and low heat loss
Stable advanced coating up to 380 centigrade
Long time warranty to 15 years
High level vacuum ensure operation under cold weather
Data sheet of solar vacuum tube
Material borosilicate glass 3.3
Structure All glass coaxial double-layer tubes
Material of coating AlN/AIN-SS/Cu
Absorptance 0.94 to 0.96
Emittance 0.04 to 0.06
Vacuum less than 5×10-4pa
Stagnation temperature 270 to 300 centigrade
Heat-loss coefficient less than 0.6w/㎡ *℃)
Bearing hailstone ability Hailstone diameter Ф25mm
Pressure-endureability 1Mpa
The parameter of solar water heater:
Inner tank:SUS304-2B food grade stainless steel.
Outer tank:Galvanized steel + powder painting
Vacuum tube: Three-High vacuum tube its absorb rate is 94-96%
Type: 16，18，20，24，30，36，40 tubes
Bracket:galvanized steel plate with plastic spraying.
Heat preservation:55-60mm imported PU; integral foaming can keep the water temperature last for 72 hours.
Capacity:100-300 liter
Life span:15years.
Freeze protection:-25℃
Wind stress:180km/h without damage
