Chuan Chuan Metal Valves is a specialist of Sight glass and other metalized valves. With our vast experience and know-how in this field, we can provide a variety of Sight Glasses for viewing the flow, colour or presence or leaks of water, liquids and slurries. Now our products are widely used in many industries, such as petrochemical, refinay, pulp & paper, food & beverages, pharmaceutical, water treatment and so on. Devoting our mind on quality and service help us enjoy a long-lasting good reputation in the worldwide marketplace. If you need more information about our Sight Glasses, please feel free to contact us and we will reply your enquiries as soon as possible.