Valves are also used as straps to fasten wooden handles to stone or metal tools, and as fillers for handles. Mayans can use valves to make shoes. Although the Central American aborigines do not vulcanize the valve formally as modern people do, they can still use organic substances to achieve similar functions, such as mixing unprocessed emulsions with sap of different varieties of trees or juice of some rattan plants. Some Brazilian aborigines will use the valve to make waterproof cloth. It has been reported that Portuguese people brought these clothes back to their motherland, frightened their fellow villagers, and were accused of witchcraft and sentenced.
How much is the price of Tongliao pump electric ball valve? According to the different media characteristics of different pipelines, the types of valves should be reasonably matched, so that this special valve electric ball valve has the ability to adapt to the current working environment. For example, if it is an oil passing pipeline, we will use a T-valve, which can have a negative impact on the erosion and expansion of ordinary valves caused by oil, Thus, the stability and safety of pipeline operation are improved. Electric ball valve is also called valve electric ball valve, flexible electric ball valve, flexible electric ball valve, valve shock absorber, etc.
The product is mainly composed of tubular valve parts composed of inner and outer rubber layers, cord layers and steel wire rings, which are vulcanized at high temperature and high pressure and then combined with metal flange loose sleeves. It is widely used in fire protection, chemical industry, pump valve and other pipeline systems, playing the role of earthquake resistance and noise reduction, and absorbing the displacement generated during pipeline operation. Electric ball valve is a hollow valve product used for flexible connection between metal pipes. Electric ball valve is also called valve pipe electric ball valve, flexible electric ball valve, valve electric ball valve, flexible electric ball valve, high pressure electric ball valve, valve shock absorber, etc.
It is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. This product takes advantage of the elasticity, high air tightness, medium resistance, weather resistance and radiation resistance of the valve. It is made of polyester cord fabric with high strength and strong cold and hot stability, which is compounded diagonally with it, and then vulcanized by high-pressure and high-temperature molds. It is widely used in various pipeline systems. Classified according to the external form: single ball electric ball valve, double ball electric ball valve, three ball electric ball valve, concentric reducing electric ball valve, eccentric reducing electric ball valve, clamp type electric ball valve, 90 ° valve elbow, etc. Classification according to the medium used: general (ordinary) electric ball valve, high temperature resistant electric ball valve, acid and alkali resistant electric ball valve, wear-resistant electric ball valve, desulfurization special electric ball valve, etc. Classification according to working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa.