Rubber is also used as a band for fastening wooden handles to stone or metal utensils, and as a filler for handles. Mayans can use rubber to make shoes. Although Central American aborigines do not vulcanize rubber 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 rubber as 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 butterfly valve? According to the different medium characteristics of different pipelines, the rubber types are reasonably matched, so that this special rubber flexible joint has the ability to adapt to the current working environment. For example, if it is an oil passing pipeline, we will use polybutadiene rubber, which can have the adverse impact of oil on the erosion and expansion of ordinary rubber, Thus, the stability and safety of pipeline operation are improved. Rubber soft joint is also called rubber soft joint, flexible electric butterfly valve, flexible electric butterfly valve, rubber shock absorber, etc.
The product is mainly composed of tubular rubber parts composed of inner and outer rubber layers, cord layers and wire rims, 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. The rubber flexible connection is a hollow rubber product used for flexible connection between metal pipes. Rubber soft connection is also called rubber pipe soft joint, flexible electric butterfly valve, rubber soft joint, flexible electric butterfly valve, high-pressure electric butterfly valve, rubber shock absorber, etc.
It is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. This product uses the advantages of rubber such as elasticity, high air tightness, medium resistance, weather resistance and radiation resistance. It is made of polyester cord fabric with high strength and strong cold and hot stability, which is diagonally compounded with it, and then vulcanized by high-pressure and high-temperature molds. It is widely used in various pipeline systems. According to the external form, it can be classified as: single ball electric butterfly valve, double ball electric butterfly valve, three ball electric butterfly valve, concentric reducing electric butterfly valve, eccentric reducing electric butterfly valve, clamp type electric butterfly valve, 90 ° rubber elbow, etc. Classification according to the medium used: general (ordinary) electric butterfly valve, high-temperature electric butterfly valve, acid and alkali resistant electric butterfly valve, wear-resistant electric butterfly valve, desulfurization special electric butterfly valve, etc. Classification according to working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa.