高清AV中文,国产强奸久久三级片男人天堂,4色Av永久,亚洲欧美日本一区二区视频,三级麻豆樱花在线观看视频,亚洲一级理论,在线播放国产一区,av一级在线,亚洲无码一级片,日韩av成人无码黄色网站

Insulation reversing valve

PRODUCTS > Melamine is special > Insulation reversing valve

Insulation reversing valve

Patent No: ZL 2011 10413378.0 ZL 2011 20516198.0
Insulation reversing valve is a special valve designed for melamine process system, which needs multi-way switching, insulation operation and preventing crystallization.
The valve is equipped with an insulating jacket, which uses high temperature gas to insulate the valve.