German JC-valves valves JC-valves models JC-valves prices

The closing element (ball) of JC-valves valves 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-way ball valves in pipelines can not only flexibly control the confluence, diversion, and switching of flow direction of the medium, but also close any one channel to connect the other two channels. This type of valve should generally be installed horizontally in pipelines. Ball valves are classified by actuation method into: pneumatic ball valves, electric ball valves, and manual ball valves.

JC-valves valve industry applications

Ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical engineering, papermaking, pharmaceuticals, water conservancy, electric power, municipal engineering, and steel, occupying a pivotal position in the national economy. They feature a 90-degree rotational 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 shut-off, distribution, and changing the flow direction of the medium. They require only a 90-degree rotation and minimal torque to achieve tight shut-off. Ball valves are most suitable for use as on/off and shut-off valves, specifically 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 actuators in electric valves are electromechanical devices whose operating status is greatly affected by the environment. Under normal conditions, special attention should be paid when using electric ball valves and butterfly valves in the following environments. [1]

JC-valves valve sealing requirements

The sealing performance of a valve refers to the ability of its various sealing parts to prevent medium leakage, which is the most important technical performance indicator of a valve. There are three sealing parts in a valve: the contact area between the two sealing surfaces of the closure element and the valve seat; the mating area between the packing and the valve stem and packing gland; 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 shut-off, 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, i.e., medium leaking 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.

JC-valves valve structure

Good sealing performance, but the load of the working medium on the ball is entirely transmitted to the outlet sealing ring. Therefore, it is necessary to consider 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. Valve fixed ball valve Valve fixed ball valve The ball of the 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 emerged. Special lubricating oil is injected between the sealing surfaces to form an oil film, which enhances sealing performance and reduces operating torque, making them more suitable for high-pressure, large-diameter ball valves.

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