Electric butterfly valve can also be called flexible electric butterfly valve, rubber soft connection, soft joint, flexible electric butterfly valve, rubber expansion joint, electric butterfly valve, shock absorber, etc. It is a pipe connector with high elasticity, high air tightness, medium resistance and weather resistance. The electric butterfly valve is generally composed of inner rubber layer, fabric reinforcement layer (reinforcement layer includes multi-layer rubber scraped nylon cord fabric), middle rubber layer, outer rubber layer, end reinforcement metal ring or steel wire ring, which is formed by high temperature and high pressure vulcanization and loosely combined with metal flange or parallel joint. This product makes use of the advantages of rubber such as high elasticity, high air permeability, medium resistance, weather resistance and radiation resistance, which can reduce the vibration and noise of pipes and compensate for the expansion and contraction caused by temperature changes.
The rubber materials used vary according to the media, including natural rubber, styrene butadiene rubber, butyl rubber, butyl rubber, EPDM, chloroprene rubber, silicone rubber, fluororubber, etc. It has the functions of heat resistance, acid resistance, alkali resistance, corrosion resistance, abrasion resistance, oil resistance, etc. One's life is always full of ups and downs. It will not always rise like the rising sun, nor will it always suffer. Repeated ups and downs are just training for a person.
Therefore, there is no need to be proud of those floating on the top; There is no need to be pessimistic about those who are at the bottom. We must be frank and modest, optimistic and move forward. Technical standards: products shall be marked in the following order: product code, type code, structure code, performance code, working pressure, nominal diameter. The product and structure codes are specified as follows: flexible electric butterfly valve RFJ, single ball D, double ball S, elbow W, concentric reducer Yt, eccentric reducer Yp, fan coil connector F.
Mark example: RFJD-1.6 × 200,. It refers to a single spherical flexible electric butterfly valve with a nominal diameter of 200mm, and the working pressure is 1.6Mpa. Working pressure: the test pressure of the electric butterfly valve is 5 times of the working pressure, and the pressure is 3 times of the working pressure. Vacuum resistance: for electric butterfly valves with nominal inner diameter less than 300mm and working pressure more than 1.6Mpa, the vacuum resistance shall not be less than 100Kpa. For rubber with other specifications, the vacuum of the forehead shall be specified by the agreement between the supplier and the demander. Safety evaluation of electric butterfly valve used in domestic drinking water system: safety of electric butterfly valve used in domestic drinking water system When the flat angle electric butterfly valve is used in domestic drinking water system, the water quality after passing the product shall comply with GB/T5749 Sanitary Standard for Drinking Water and GB/T17219 Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials Relevant regulations and requirements. Requirements for metal flange and flat union: metal flange shall meet the requirements of GB/T9119, and flat union shall meet the requirements of GB/T3289.37.