Jacket: Generally welded from carbon steel or stainless steel seamless steel pipes, it tightly wraps the exterior of the valve body to form an independent circulation channel. The inlet and outlet are located on both sides of the valve body, used to connect external heating or cooling pipelines. There are two types of jackets: integral and split. The integral jacket is integrally cast or welded with the valve body, featuring uniform temperature distribution and suitability for high-pressure and high-temperature working conditions; the split jacket is connected to the valve body via flanges, facilitating disassembly and maintenance, but with slightly inferior temperature uniformity.
Ball and Valve Seat: The ball is mostly made of 316 stainless steel or coated with ceramic lining. The valve seat material is selected according to the medium. Common ones include PTFE/PEEK, which have strong corrosion resistance, are suitable for temperatures ranging from -29℃ to 270℃, and have a low leakage rate; there are also metal sealing materials, such as Gratite® graphite or Metaltite® metal valve seats, which can withstand high temperatures of 500℃ and are suitable for scenarios with strict fire protection requirements.
Valve Stem and Packing: The valve stem is usually made of 304SS or 316SS to ensure strength and corrosion resistance. The packing is mostly PTFE or enhanced PTFE, located at the bottom of the stuffing box, ensuring excellent sealing performance and preventing medium intrusion.
The jacketed ball valve introduces steam, hot water, heat-conducting oil or other media through the external jacket, so that the medium inside the valve body maintains a certain temperature, preventing the medium from solidifying, crystallizing or changing viscosity. The ball is connected to the actuator through the valve stem, and rotating the ball can realize the opening and closing of the valve, controlling the on-off and flow of the fluid.
- Heat and Cold Insulation: It can effectively maintain the stability of the medium temperature, prevent changes in medium performance due to temperature changes, and reduce heat loss of the medium in the pipeline.
- Reliable Sealing: Adopting elastic sealing valve seats or metal sealing structures, it has good sealing performance, can achieve two-way sealing, and reduce the risk of leakage.
- Low Fluid Resistance: Full-bore jacketed ball valves have almost no flow resistance, and the medium flows in a straight line. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, which will not cause erosion of the valve sealing surfaces.
- Easy Operation: It can be opened and closed quickly, requiring only a 90° rotation from full open to full close. It is easy to realize remote control and can be equipped with various driving methods such as manual, pneumatic, and electric.
- Chemical Industry: Used to transport high-viscosity liquids such as resins, adhesives, and paints, as well as chemical raw materials that are prone to solidification or crystallization at high or low temperatures.
- Petroleum Industry: In the processes of crude oil transportation, heavy oil processing, and asphalt transportation, it can prevent medium solidification and ensure smooth pipelines.
- Pharmaceutical Industry: Suitable for pipeline control of high-concentration liquid medicines, ointments, etc., ensuring drug quality and the stability of the production process.
- Food and Beverage Industry: Used to transport viscous materials such as chocolate paste, honey, and syrup, preventing the materials from solidifying or deteriorating in the pipeline.
