German Bar valves Bar models Bar prices

The closure member (ball) of the Bar valve is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V type ball valve has strong shear force between its V type ball core and the metal valve seat surfacing with hard alloy, making it particularly suitable for media containing fibers, small solid particles, etc. Multi-port ball valves can not only flexibly control the confluence, diversion, and direction switching of the medium in pipelines, but also close any channel to connect the other two channels. This type of valve should generally be installed horizontally in pipelines. Ball valves are classified by drive method into: pneumatic ball valves, electric ball valves, and manual ball valves.

Bar valve industry applications

Ball valves are widely used in oil refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal engineering, steel, and other industries, playing a significant role in the national economy. It features a 90 degree rotation action, with the plug being a sphere that has a circular through-hole or passage along its axis. Ball valves are mainly used in pipelines for cutting off, distributing, and changing the flow direction of the medium. They require only a 90 degree rotation operation and very small torque to achieve tight shut-off. Ball valves are most suitable for use as on-off and cut-off valves, V type ball valves. In addition to paying attention to pipeline parameters, special attention should be paid to the environmental conditions for electric valves, as the electric device in electric valves is an electromechanical component whose operating status is greatly affected by the environment. Under normal conditions, special care must be taken when using electric ball valves and butterfly valves in the following environments. [1]

Bar valve sealing requirements

The sealing performance of a valve refers to the ability of each sealing part to prevent medium leakage, which is the most important technical performance indicator of the valve. There are three sealing parts in a valve: the contact area between the closure member and the two sealing surfaces of the valve seat; the mating area between the packing, the valve stem, and the packing box; and the connection area between the valve body and the valve cover. Leakage at the first location is called internal leakage, commonly known as incomplete closure, which affects the valve's ability to cut off the medium. For shut-off valves, internal leakage is not allowed. Leakage at the latter two locations is called external leakage, where the medium leaks from inside the valve to the outside. External leakage causes material loss, environmental pollution, and may even cause accidents in severe cases. For flammable, explosive, toxic, or radioactive media, external leakage is strictly prohibited, so valves must have reliable sealing performance.

Bar valve structure

Good sealing performance, but the load of the working medium on the ball is fully transmitted to the outlet sealing ring. Therefore, consideration must be given to whether the sealing ring material can withstand the working load of the ball medium. Under high pressure impact, the ball may shift. This structure is generally used for medium and low-pressure ball valves. Fixed ball valve Fixed ball valve The ball of the fixed ball valve is fixed and does not move under pressure. Fixed ball valves are equipped with floating valve seats. Under medium pressure, the valve seat moves, pressing the sealing ring tightly against the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the ball, resulting in low operating torque, making them suitable for high-pressure and large-diameter valves. To reduce the operating torque of ball valves and increase sealing reliability, oil-sealed ball valves have been developed. Special lubricating oil is injected between the sealing surfaces to form an oil film, which enhances sealing and reduces operating torque, making them more suitable for high-pressure, large-diameter ball valves.

Weidou Intelligent Technology specializes in selling German Bar valves, Bar safety valves, Bar globe valves, Bar control valves, Bar solenoid valves, Bar ball valves, Bar proportional valves, Bar diaphragm valves, Bar butterfly valves, Bar hydraulic transmission valves, Bar check valves, Bar pressure reducing valves, Bar relief valves, Bar sequence valves, Bar balance valves, Bar throttle valves, Bar directional control valves, all originally imported from Germany. Welcome customers to inquire and order.