What is the colloidal substance in water? The colloidal substance in water refers to particles having a diameter of between 10-4 and 10-6 mm. Colloids are a collection of many molecules and ions. The mineral colloids in natural water are mainly iron, aluminum and silicon compounds. The organic colloid in water is mainly the humus formed by the decay and decomposition of the limbs of plants or animals. Among them, the humus content in the lake water is the most, so the water is often yellow-green or brown. Since the colloidal substance has small particles and light weight, and the surface area per unit volume is large, the surface has a large adsorption capacity, and a large amount of ions are often adsorbed and charged. Colloids of the same type are mutually repelled by the same-sex charge, and the glues are not bonded to each other in water and are in a stable state. Therefore, the colloidal particles cannot be removed by gravity self-settling. Generally, the addition of the agent in water destroys the stability, and the colloidal particles are enlarged and settled to be removed. API 602 Gate Valve is samll forging shut off valve which widely used in all type system of thermal power plant. API 602 gate valve with solid wedge, bolt bonnet or welding bonnet type as well as full port or reduce port. Valve size from 1/2"(PN15) to 2"(PN50) matching pressure class 150(PN16) to class 2500(PN420). Valve connection can be NPT, BW, SW, RF. Api 602 Gate Valve,Alloy Steel Gate Valve,Api602 Gate Valve,Slab Gate Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com