In the industry, the most commonly used equipment for regulating gas flow in the pipeline is a pressure reducing valve known to those in the industry. These valves provide mechanical contraction in the pipeline, just like reducing the flow of the orifice plate, which can reduce the cross-sectional flow area, so it will affect the local pressure drop in the flow. In the piping and piping sector, valves are generally considered to be devices or natural objects that regulate, guide, or control the flow of fluids by opening, closing, or partially blocking various channels of fluid substances. Generally, valves are technically fittings, but they are usually discussed as a separate category due to their complex and diverse applications and matching uses. In the valve opening, the fluid flows in the direction from high pressure to low pressure.
In history, the simplest and oldest valve was just a freely hinged flap that fell to prevent fluid flow in one direction, but was pushed away by the flow in the opposite direction. For this type of valve, it is called a check valve because it can block or check the flow in one direction. At the same time, modern control valves can regulate pressure or downstream flow and operate on complex automated systems to suit the complex uses in the market.
For practical purposes, valves and pumps are two intertwined fluid control devices that cooperate with each other to achieve their goals. A pump is a device that moves liquid substances through its mechanical action. Traditionally, pumps can be divided into three main types based on the methods used by those pumps to move the target fluid. These three types depend on how they move the fluid, and there are direct lift, displacement, and gravity methods. There are direct lift pump, displacement pump, and gravity pump. Pumps are usually operated by a reciprocating mechanism or a rotating mechanism, and consume energy to perform mechanical work that moves fluid. The mechanical pump can also be submerged in the fluid pumped by the pump or placed outside the fluid. The pump can be divided into positive displacement pumps, impulse pumps, velocity pumps, gravity pumps, steam pumps and valve-less pumps, according to its displacement method. Besides, there are two basic types of pumps, positive displacement and centrifugal. Broadly speaking, the pump can be operated by a lot of power (energy), such as manual operation of human power, electricity, engine, and even wind power. These energy sources can be a wide variety of equipment, varying in size, from microscopic for use in medical applications to large industrial pumps for waterworks.
Someone may wonder how the pressure reducing valve works in real life. A pressure reducing valve is a valve that withstands high inlet pressure and reduces it to a lower designed outlet pressure, so it can work under both flow and no pressure conditions. Make it happen. In the case of flow, the type of control is called anti-drip.
Regarding the basic structure of all valves, in general, the main components of the most commonly used types of valves include two parts: the valve body and the valve cover. Together, these two parts form a housing that contains the fluid flowing through the valve. First, let's take a look at the body. The main body of the valve is the housing of most parts of the valve, containing internal parts, and the valve cover is the part of the housing through which the valve stem passes, forming the guide and seal of the valve stem. Generally, the valve cover is screwed into the valve body, so the valve body is usually metal or plastic, and is strong and stern. Regarding metal materials, possible materials are brass, bronze, gunmetal, cast iron, steel, alloy steel and stainless steel.
In some cases, such as when seawater is used in a desalination plant, double valves and super double valves are usually used, because in that case, in order to resist the warm seawater, it must have corrosion resistance. These are common discussions in practical applications. Field operators and business owners must learn more about working conditions so that the entire part can work more smoothly in the manufacturing plant.
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