Today, let's see how to select the O-ring of soft seal gate valve?
1. At normal temperature and low pressure, non-metallic soft sealing gasket shall be selected; In case of medium pressure and high temperature, metal and non-metal combined gasket or metal gasket shall be selected; When the temperature and pressure are relatively stable, select elastic or self tightening gaskets; Under low temperature, corrosive medium or vacuum conditions, special functional gaskets shall be considered.
2. Soft seal gate valve can be selected according to lessons for occasions where the demand is not high, and can be interchanged when it is not suitable.
3. For those occasions requiring strict requirements, such as explosive, highly toxic and combustible gases, highly corrosive liquid equipment, reaction tank and transportation pipeline system, they shall be selected according to the working pressure, working temperature, the corruption of sealing medium and the situation of combined sealing surface. Silica gel sealing ring has an open porous structure and can adsorb many substances. It is a good desiccant, adsorbent and catalyst carrier. The adsorption effect of silica gel is mainly physical adsorption, which can be produced and reused again. Adding acid to alkali silicate (such as sodium silicate), acidizing it and adding a certain amount of electrolyte to form a silica gel. Or adding acid or ammonium salt in a concentrated sodium silicate solution can also produce silica gel. Silica gel products are processing works with silica gel as the primary raw material, which are called silica gel products. Silica gel is a porous material with different particle size and size, which is dehydrated by silica gel. It has an open porous structure and can adsorb many substances. It is a good desiccant, adsorbent and catalyst carrier.
