Electric double eccentric hemisphere valve_ Stainless steel eccentric hemispherical valve is a new product successfully developed by absorbing advanced technology at home and abroad. It is also an innovative product to fill the gap of domestic valve varieties. It is all domestic innovative products developed by referring to similar products in Germany on the premise of carefully weighing the advantages and disadvantages of various valves such as ball valve, butterfly valve, gate valve, etc It is superior to gate valve, globe valve and ball valve. The eccentric hemisphere valve can be overlaid with different alloys according to the needs of users. The selection of bimetal seal ring can be used in different industrial departments which require strict sealing, such as wear resistance, corrosion resistance, high temperature resistance, etc.

It is by rotating the valve chain to make the valve unblocked or blocked. The ball valve has the advantages of light switch, small volume, large diameter, reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often in closed state and are not easy to be eroded by medium, so they are widely used in various industries. The eccentric hemispherical valve uses eccentric valve body, eccentric ball and valve seat. When the valve rod rotates, it will automatically center in the common track. The closer it is closed, the tighter it will be. It can completely achieve the purpose of good sealing. The ball and valve seat of the valve are completely separated, which eliminates the wear of the sealing ring and overcomes the problem that the traditional ball valve seat and the sealing surface of the ball are always worn. The non-metallic elastic material is embedded in the metal seat, and the metal surface of the valve seat is well protected. This product is especially suitable for steel industry, aluminum industry, fiber, small solid particles, pulp, coal ash, petroleum gas and other media

1. The structure adopts the eccentric clamping principle and achieves the purpose of locking, adjusting and closing through the transmission mechanism. The sealing pair is the metal surface ring with hard surface contact seal. When the double eccentric structure is opened, the valve core is located in the ball chamber, and the flow cross-section is large, and the valve core is not scoured when the valve is closed. When the valve core is opened, the spherical surface of the valve core gradually moves along the valve seat, effectively removing the scaling obstacles By sealing. It is especially effective for the mixed flow transportation of two-phase mixed flow, which is easy to scale solid precipitation
2. The hemisphere of the valve is made of bimetallic, and the base metal is overlaid with different alloys. After special treatment, the sealing surface is combined with various types of anti-corrosion, wear-resistant and high-strength to meet the needs of different occasions
3. Tight sealing and zero leakage of harmful gas
4. The valve core of the sealing pair has a compensation amount. When the valve is worn, it will rotate a little when it is closed, so it can seal reliably and prolong the service life. In addition, the valve seat can still be used after adjustment or replacement after the compression nut is screwed off by the user, which avoids the disadvantage of scrapping the whole set after the valve seal fails. The selection of bimetal seal pairs with different alloy (or combination ball) can be used for wear-resistant, corrosion-resistant, high-temperature resistant and strict sealing conditions
1. General purpose valve: Specification and model dn40-1600. It is suitable for sewage treatment, pulp, urban heating and other places with strict requirements
2. Special valves for petrochemical industry: Specification dn40-1600. Suitable for crude oil, heavy oil and other oil products, chemical industry weak corrosion, two-phase mixed flow medium
3. Special gas valve: Specification dn40-1600. It is suitable for the control of gas, natural gas and liquefied gas
4. Special valve for slurry: dn40-1600. It is suitable for liquid and solid two-phase mixed flow or industrial pipeline transportation with crystallization precipitation or scaling in chemical reaction
5. Special valve for pulverized coal ash: Specification dn40-1600. It is suitable for power plant, hydraulic slag removal or gas pipeline control
6. According to the requirements of working conditions and different media, our company has various types of eccentric hemisphere valves, including nodular cast iron, cast steel, stainless steel, 304304L, 316316L, 220525072520, etc.

1. The flow resistance is small, and its resistance coefficient is equal to that of the same length of pipe.
   2. Simple structure, small volume and light weight
   3. It is compact and reliable. At present, the sealing surface material of ball valve is widely used with good sealing performance, and it has been widely used in vacuum system.  
   4. It is easy to operate and fast to open and close. Only 90 ° rotation is needed from full opening to full closing, which is convenient for remote control.  
   5. The maintenance is convenient, the ball valve structure is simple, the sealing ring is generally movable, and it is convenient to dismantle and replace.  
   6. When the valve is fully open or closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface.  
   7. Wide range of application, diameter from small to several millimeters, large to several meters, from high vacuum to high pressure.  
   8. The valve is made of 316 stainless steel, which makes the valve more resistant to corrosion and wear under working conditions. It is the preferred product for chemical plants.  
   9. The electric double eccentric hemispherical valve of our company has developed its own precision casting valve body, which fundamentally eliminates the existence of sand hole in the valve body and the leakage problem of the valve in the process of conveying toxic liquid.

A. The full bore eccentric hemisphere valve (the minimum overflow nominal diameter shall not be less than 95%) shall refer to GB / T 26146-2010, and the minimum reduction shall be 75% of the diameter
B. The top mounted eccentric hemispherical valve can be maintained online without disassembling the valve. The ball crown and valve stem are made of stainless steel, which is more corrosion-resistant. The stainless steel stem can prevent the residual medium in the valve pipe and prevent the valve stem from sticking.  
C. The valve torque is completely matched with the electric installation safety torque, which eliminates the mutual prevarication caused by the wrong torque selection between the electric installation manufacturer and the valve manufacturer, thus affecting the normal operation of the valve on the pipeline.  
D. The electric eccentric hemispherical valve is operated by electric actuator. The valve is easy to operate and can be opened flexibly. It can be controlled remotely. The valve can be allowed to leave the factory only after the valve is installed and debugged, and the leakage problem on the installation site is eliminated.