antifreeze valve for solar water heater
1.completedly automatical mechanical operation principle
2.brass body and thermal element
3.corrosion and crack resistant
4.easily installed
5. 0.69 Mpa maxium operating pressure
6. size: ￠25*87mm
7. n.w.: 180gram
8. open temperature: 3 oC
    close temperature: 6 oC