German hembrug valve hembrug model hembrug price

With a constant pressure differential across the hembrug valve, the flow rate of a standard valve changes little when the opening varies over a wide range, but changes sharply at a certain opening, indicating poor regulation performance. A control valve adjusts the flow by changing the valve core stroke according to the direction and magnitude of the signal, thereby altering the valve's resistance coefficient. Control valves are divided into manual and automatic types, with various subtypes offering different regulation performances. Automatic control valves include self-acting flow control valves and self-acting differential pressure control valves.

hembrug valve connection method: threaded connection

This is a simple connection method, commonly used for small valves. It is divided into two cases: 1) Direct sealing: internal and external threads directly provide the seal. To ensure no leakage at the connection, lead oil, hemp, and PTFE raw tape are often used for filling; among these, PTFE raw tape is increasingly widely used. This material has excellent corrosion resistance, provides superior sealing, and is convenient to use and store. It can be removed intact during disassembly because it is a non-adhesive film, making it far superior to lead oil and hemp. 2) Indirect sealing: the tightening force of the thread is transmitted to the gasket between the two planes, allowing the gasket to provide the seal.

hembrug valve sealing requirements

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

hembrug valve advantages

The electric ball valve structure consists of only a few components, saving material usage; it is small in size, light in weight, has small installation dimensions, requires low driving torque, is easy and agile to operate, and can be quickly opened or closed by rotating just 90°; it also features good flow regulation and tight sealing characteristics. In applications with medium-to-large diameters and medium-to-low pressures, the electric ball valve is the dominant valve type. When the electric ball valve is fully open, the disc thickness is the resistance to the medium flowing through the valve body, resulting in a small pressure drop and thus good flow control characteristics. Electric ball valves have two sealing types: elastic sealing and metal sealing. For elastic sealing valves, the sealing ring can be embedded in the valve body or attached to the periphery of the disc. Valves with metal sealing generally have a longer service life than those with elastic sealing, but it is difficult to achieve complete sealing. Metal sealing can adapt to higher working temperatures, while elastic sealing has the disadvantage of being limited by temperature. If an electric ball valve is required for flow control, it is important to accurately select the valve size and type. The structural principle of the electric ball valve is particularly suitable for manufacturing large-diameter valves. Electric ball valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in the cooling water systems of thermal power stations. Common electric ball valves include wafer-type and flanged-type. Wafer-type electric ball valves are connected between two pipe flanges using double-headed bolts, while flanged electric ball valves have flanges on the valve, which are bolted to the pipe flanges. The strength performance of a valve refers to its ability to withstand medium pressure. As a mechanical product subjected to internal pressure, a valve must have sufficient strength and stiffness to ensure long-term use without rupture or deformation. A pneumatic ball valve consists of a ball valve equipped with a pneumatic actuator. Pneumatic actuators are divided into double-acting and single-acting types, controlled by solenoid valves to realize the switching action of the ball valve. Pneumatic ball valves enable intelligent control, rapid opening or closing of pipelines, and effective control and management of pipeline networks.

Weidou Intelligent Technology specializes in selling German hembrug valves, hembrug safety valves, hembrug globe valves, hembrug control valves, hembrug solenoid valves, hembrug ball valves, hembrug proportional valves, hembrug diaphragm valves, hembrug butterfly valves, hembrug hydraulic transmission valves, hembrug check valves, hembrug pressure reducing valves, hembrug relief valves, hembrug sequence valves, hembrug balance valves, hembrug throttle valves, hembrug directional control valves, all original imports from Germany. Customers are welcome to inquire and order.