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What Are Globe Valves?

What Are Globe Valves? Globe valves, also known as shutoff valves, belongs to forced sealing valves, so when the valves are closed, pressure must be exerted on the disc to force the sealing surface not to leak. When the medium enters the valve from below the disc, the resistance to be overcome by the operating force is the friction between the stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem is larger, otherwise the […]

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Why can’t stainless steel screws and nuts be used together?

We all know that self-tapping screws do not require nuts because they are born with cool and anti-loose skills. But you have heard that stainless steel screws cannot be used with nuts. This is why?  Why is your stainless steel fastener locked Precautions and methods to avoid locking Common problems and solutions in the use of stainless steel screws The reason why this is said is that, when the low temperature pipe flange is assembled, if it is fastened with stainless steel bolts and nuts, it is very easy to bite after a period of time. This is because after the screwing, the […]

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Selection and installation of safety valve

What is a safety valve? The safety valve used in pressure equipment, container or pipeline, as the overpressure protection device. When the equipment, container or piping within the pressure exceeds the allowable value, the valve automatically opens, then the whole amount of emissions, to prevent the equipment, container or piping within the pressure continues to rise; when the pressure is reduced to the specified value, the valve should be closed automatically in a timely manner, so as to protect the safe operation of equipment, container or piping. Nominal terms Classification of safety valves Selection of safety valve How to order […]

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What is a fastener?

What is a fastener? Fastener is a kind of mechanical parts used for fastening connection and widely used. Fasteners are widely used in various industries, including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, dies, hydraulic and other industries. A variety of fasteners can be seen in machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instrumentation and supplies. They are the most widely used mechanical basic parts. Its characteristics are various varieties and specifications, different performance and uses, and the degree of standardization, serialization and generalization is also very high. Therefore, some people refer to a […]

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Cause Analysis of Valve Leakage

Valve leakage is generally divided into two types: external leakage and internal leakage. Internal leakage refers to the inadequate closure of the valve due to erosion and abrasion of the conveying medium, scratches on the sealing surface and other reasons, which can not completely prevent the conveying through after the valve is completely closed. Leakage generally refers to the defect of the valve body itself, improper sealing between flanged joints or connecting threads, resulting in the outflow or leakage of conveying media outside the valve body. Cause Analysis of Valve Leakage Cause Analysis of Valve Internal Leakage Solutions to Valve […]

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What are butterfly valves?

What are butterfly valves? Butterfly valve, also known as flip valve, is a simple structure control valve, which can be used for switch control of low-pressure pipeline media. Butterfly valve refers to a valve whose closing parts (disc or butterfly plate) are discs and rotate around the valve axis to open and close. Butterfly valves can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling in the pipeline. The opening and closing part of butterfly valve is a disc-shaped […]

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What is a pressure pipeline?

Pressure pipeline is a kind of special equipment, refers to the use of certain pressure, tubular equipment used for transferring gas or liquid. The scope of the provisions for the maximum working pressure is greater than or equal to 0.1MPa (g) gas, liquefied gas and steam medium or combustible, explosive, toxic, corrosive, high working temperature is higher than or equal to the normal boiling point of the liquid medium, the pipeline and the nominal diameter greater than 25mm. Working principle For a single pressure pipeline, is to rely on external force or the driving force of the medium itself the source […]

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Classification & Characteristics of ball valves

A ball valve is mainly used in the pipeline to distribute the flow and change the flow direction of the medium. It can be closed tightly by only a small torque and being rotated 90 degrees. The ball valve is most suitable for use as a switch or shut-off valve. Ball valves were introduced in the 1950s. With the rapid development of science and technology, the continuous improvement of production technology and product structure, ball valve has rapidly developed into a major valve category in just 50 years. Classification of ball valves Characteristics of ball valves Since ball valves typically […]

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The Function of Sealing Gasket and How to Discern and Choose?

In the process of routine inspection, sealing gaskets are indispensable to boilers, pressure vessels, pressure pipes and other confined pressure devices. However, due to the lack of professional knowledge in the selection and application of sealing gaskets in most enterprises, some misunderstandings will inevitably arise if they are selected only by experience. As a result, the phenomena of running, running, dropping and leaking are common, causing a lot of waste to the unit, and even serious accidents due to the failure of sealing gaskets. This kind of situation is mainly caused by problems in the selection and assembly of sealing […]

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Notices in Pipeline Construction of Forged Steel Valves

Forged steel valves are mainly used in pipelines of various systems in thermal power plants, and can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media. Compared with other valve products, forged steel valves are characterized by high temperature and pressure resistance, unique self-sealing design, the higher the pressure, the more reliable the sealing. Because of the special performance, technical characteristics and working conditions, the products also have the characteristics that other products can not replace. Forged steel valves can be classified as forged […]

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