German Stubbe valves Stubbe models Stubbe prices

The closure element (ball) of the Stubbe valve is driven by the valve stem and rotates around the ball valve axis. 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 switching of flow direction 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.

Stubbe 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, occupying a pivotal position in the national economy. It features a 90-degree rotational action, with a spherical plug body having 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 can achieve tight shut-off with only a 90-degree rotation and minimal torque. Ball valves are most suitable for use as on/off and shut-off valves, specifically V type ball valves. In addition to pipeline parameters, special attention should be paid to the environmental conditions for electric valves, as the electric actuator in an electric valve is an electromechanical device whose operating status is greatly affected by the environment. Typically, special care is required when using electric ball valves and butterfly valves in the following environments. [1]

Stubbe 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 locations in a valve: the contact area between the sealing surfaces of the closure element and the valve seat; the mating area between the packing, valve stem, and packing gland; and the connection area between the valve body and 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, 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.

Stubbe 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 Stubbe valves, Stubbe safety valves, Stubbe globe valves, Stubbe control valves, Stubbe solenoid valves, Stubbe ball valves, Stubbe proportional valves, Stubbe diaphragm valves, Stubbe butterfly valves, Stubbe hydraulic actuated valves, Stubbe check valves, Stubbe pressure reducing valves, Stubbe relief valves, Stubbe sequence valves, Stubbe balance valves, Stubbe throttle valves, Stubbe directional control valves. Original imports from Germany. Welcome customers to inquire and order.