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. Requirements when the end face of the electric butterfly valve is reinforced with steel wire rings: when the end face of the electric butterfly valve is reinforced with steel wire rings, the steel wire rings shall be round and located in the same plane in the same year.
The difference between rubber soft connection and metal soft connection: what is the difference between rubber soft connection and metal soft connection? The two seem very similar, but their functions are different. Stainless steel metal hose, also known as metal hose, metal flexible connection and stainless steel hose, has good flexibility, temperature resistance, pressure resistance and corrosion resistance, and is suitable for transmission of steam, water, oil and various industrial gases and other media.
The rubber soft connection sphere is composed of a rubber tube with multiple layers of scraped nylon cord fabric and an outer rubber layer in the inner rubber layer and the reinforcement layer. 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, wear resistance, oil resistance, etc. The metal soft connection plays an important role in the movement of the pipeline system, absorption of thermal expansion, and absorption of vibration. The model length and connection method of the metal soft connection are based on the user's requirements.
Shaoxing internal suction grooveless rubber flexible joint has a 10-year warranty. The rubber flexible joint is generally installed in places where there is vibration at the pipeline running place or the axial expansion and contraction of the pipeline due to the impact of thermal stress during long-distance pipeline transportation. In the face of problems arising from the installation and operation of these pipelines, Shanghai Luoying recommends that you use our company's flagship brand electric butterfly valve, This kind of electric butterfly valve has a good expansion displacement compensation function, and can make up for the errors in the connection of the pipeline during the actual construction process. After more than ten years of dedicated research, our company has finally established a perfect electric butterfly valve system.