1. Connection method: The U-shaped flange butterfly valve DN1200 adopts flange connection and is directly connected to the pipe flange through bolts. This connection method ensures reliable sealing and convenient installation, making it particularly suitable for high-pressure and large-diameter scenarios.

2. Valve body design: The valve body is typically made by casting or forging processes to ensure it has sufficient strength and rigidity to withstand the pressure of the medium in the pipeline. The inner cavity design is smooth, which helps to reduce fluid resistance and vortices, enhance the valve's flow capacity and lower energy consumption.

3. Butterfly plate structure: The butterfly plate is a circular thin plate that controls the flow of the medium by rotating around its own axis (0° to 90°). The material of the butterfly plate can be selected according to the characteristics of the medium, such as stainless steel, copper, nylon, rubber coating or polytetrafluoroethylene (PTFE), etc., to adapt to different working conditions.

4. Sealing system: The sealing forms may include soft sealing, hard sealing or composite sealing. The soft seal is made of elastic materials such as nitrile rubber and EPDM, and has good sealing performance. Hard seals are made by surfacing materials such as stainless steel and cobalt-based hard alloy onto the sealing surfaces of the valve seat and butterfly plate, which can withstand high temperatures and pressures and have a long service life. Composite seals combine the advantages of both metal hard seals and elastic seals.

5. Valve Stem and Drive unit: The valve stem connects the butterfly plate and the operating mechanism (manual, electric, pneumatic), and must meet the requirements of anti-corrosion and strength. The drive mode can be selected as manual, electric or pneumatic according to actual needs.
 

Features
1. Versatility: The U-shaped flange butterfly valve DN1200 can achieve the on-off and regulating functions of the fluid in the pipeline. Compared with gate valves and globe valves, it has better versatility.

2. Light weight and compact size: With a small overall dimension and light weight, it saves installation space, is easy to install, and can reduce the cost of the pipeline system.

3. Excellent sealing performance: When soft sealing or composite sealing is adopted, complete airtightness can be achieved, with reliable sealing and no need for frequent maintenance.

4. Easy operation: The opening and closing functions can be achieved within a 90° rotation range, making the operation simple and fast.

5. Strong corrosion resistance: Corrosion-resistant materials such as 316L stainless steel and Hastelloy can be selected according to the characteristics of the medium to extend the service life.

6. Wide range of applicable media: It is suitable for fresh water, seawater, air, steam, food, medicine, as well as various oils, acids, alkalis, salts and other media.

7. Easy maintenance: The sealing parts are replaceable and can be opened and closed under pressure multiple times without zero leakage, reducing maintenance costs.