supplied by MED are durable and superior, including cast steel ball valves, fully weld ball valves, top entry ball valves, high temperature ball valves, cryogenic ball valves and three way ball valves.
The application of ball valves is very extensive, with the number of related products being continuing to expand. And they have played an important role in petroleum, chemical, electric power, water conservancy, urban construction and other fields nowadays.
With fire-safe, anti-static and blow-out proof features, ball valves are generally used in pipelines to cut off and adjust the use of media, which are capable of flexibly switching off and distributing media, and changing their flow directions. The sealing surface of a ball valve is usually in a closed state with the sphere, so it is not easy to be eroded by the medium. Ball valves are easy to operate with a simple and compact structure and can be widely applied in some special working conditions with water, natural gas, acid, solvent and so on.
MED offers products of high quality, including cast steel gate valves, pressure seal gate valves, bellow seal gate valves, slab gate valves, stainless steel gate valves and cryogenic gate valves.
Gate valves are one of the most common open-close valve products, using the gate to connect or cut off the medium in the pipeline. What's special about gate valves is that they can only be fully opened and fully closed. When this type of valve is fully opened, the flow resistance of the medium in the valve channel is almost zero so that the opening and closing of gate valves will be very labor-saving. However, the distance from the gate to the sealing surface is far, with the time of opening and closing being long.
Gate valves easily adapt themselves to the environment, which can be applied in high-temperature, low-temperature, high-pressure and low-pressure conditions. Due to the need for relatively high sealing performance and small flow resistance, it is appropriate to choose gate valves to use in the steam pipelines and large-diameter water supply pipelines.
MED manufactures special with excellent performance and beautiful appearance, which are used in various industries, such as petroleum, chemical, pharmacy, chemical fertilizer, electric power plants, etc.
Globe valves are durable and easy to make and maintain, with the sealing surfaces of globe valves having small friction in the opening and closing processes and their opening height being short, which are suitable for all kinds of pressure conditions.
The main function of globe valves in chemical pipelines is to cut off or connect the fluid, which should be applied to situations that require frequent opening and closing. Globe valves have a better performance in flow regulation than gate valves, which can be used in water, steam and other pipelines. But globe valves can not be supplied to regulate the pressure and the flow for a long time, and it is improper to be used in pipelines that are easy to occur coking and precipitation, and have large viscosity. Otherwise, the sealing surfaces of globe valves may be eroded by media and the sealing performance will be destroyed.
As a kind of automatic valve, are opened and closed automatically by the flow force of media in pipelines. Their main function is to prevent the medium from running back, the pump and its driving motor from reversing, as well as the medium in the container from releasing. The working characteristic of check valves is that the load changes greatly, with the frequency of opening and closing being small. Once they're closed and opened, the service cycle will be very long.
Check valves should be installed on equipment, fittings and pipelines to stop media from being in a direction contrary to the current. Check valves are generally suitable for clean media instead of applying to media containing solid particles and great viscosity. And they are also widely used in petroleum, chemical, liquefied gas, boiler steam system, minerals, food, pharmaceutical, power generation, urban construction, municipal, and other fields, greatly improving the comprehensive use of energy efficiency.
There are many types of check valves designed and manufactured by MED, such as lift check valves, swing check valves, wafer check valves, tilting disc check valves, etc.
are regulators with simple structures. Due to the limitation of structures and sealing materials, butterfly valves are not suitable for conditions with extremely high pressure and pressure differential. Their pressure losses are rather large relative to ball valves and gate valves, so they are inappropriate for the occasion with minimal resistance requirements. But compared with other valves, butterfly valves are more suited to be made as large-diameter valves. Under the same caliber size, butterfly valves are smaller, lighter and easier to operate at a lower cost. These advantages will be more and more obvious as calibers become larger and larger.
Butterfly valves have multiple types and a wide range of applications. MED provides reliable butterfly valve products, including lug concentric butterfly valves, wafer concentric butterfly valves and double offset butterfly valves. Generally speaking, butterfly valves can be used for our domestic water pipes, fire water pipes, circulating water pipes and sewage pipes to control and adjust the flow. In addition, they are also suitable for some powder, oil, mud and ventilation pipelines.
There are mainly four kinds of high-quality made by MED, including forged ball valves, forged gate valves, forged globe valves and forged check valves.
Forged valves are the general name of all kinds of valves manufactured by forging. Forged valves are resistant to high temperatures and high pressures and are more durable than valves made in other ways. The structures of forged valves are very simple, which can be operated effortlessly and convenient to be installed and disassembled. Their effect on fluid resistance is very small, which is conducive to the flow of fluid and saves time on transportation to a certain extent.
MED supplies top-quality , such as lubricated plug valves, expanding plug valves, non-lubricated plug valves and so on.
Plug valves are mainly used to cut off the medium and change the flow direction of the medium in the pipeline. It is easy for them to adapt to multi-channel construction, which simplifies the design of pipeline system and reduces the number of connections required in the equipment. With small resistance and convenient open/close operation, the fluid can go through directly. Plug valves can be applied in oil field exploitation, natural gas field exploitation, branch pipe of pipeline transportation, refining and cleaning equipment, etc.
In the process of opening and closing, there is no friction between the core and the seat, thus avoiding energy losses and ensuring no leakage and long service life of plug valves. Plug valves own automatic sealing inspection system, double break switch and end cover on the top and bottom, which can be timely maintained and repaired. Generally, plug valves are suitable for occasions that require a high level of sealing.
MED provides multiple kinds of , including Y type strainers, T type strainers and fabricated basket strainers. Strainers are a kind of necessary filter device on all kinds of pipelines, which are usually used with all kinds of valves and mainly installed in the medium inlet. Strainers use the filter in the valve body to effectively separate impurities, particles, dirt and other unwanted debris in order to ensure that the pipelines are clean. Strainers have high filtration precision, fast filtration speed, excellent dirty hold ability, low water consumption rate in backwash and strong adjustability. And they have been widely applied in petroleum, chemical, pharmaceutical, food, environmental protection and other industries, effectively guaranteeing the stable operation of valve equipment and reducing the effect of impurities and the potential for being damaged.
There are some other types of valves, like marine valves, diaphragm valves, control valves and so on, which also play important roles in actual production and life. The choice of valves and their roles are not the same because of different media pressures, temperatures, flow, physical and chemical properties, and various control and use requirements of equipment and pipeline system. As an essential control part in pipeline systems, valves are used in petroleum, chemical, electric power, water treatment and other fields, providing effective supports for the development and production safety of related industries.
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