Explore Types of Valves Application In Various Industries

A valve, is installed in the fluid pipeline for flow controls, Control Valve, its basic function is to switch on or off the flow of the pipeline medium, changing the flow direction of the medium, regulating the pressure and flow of the medium, and protecting the normal operation of the pipeline and the equipment. 

With the development of modern science and technology, valves are increasingly used in various industries, such as oil & gas, Petroleum, Water Station, Power Station and Chemimals. Now they have become indispensable universal mechanical products in all fields of human activities. For example, a modern petrochemical plant will need tens of thousands of valves and a modern residential building will need thousands of valves.

Throttling regulation is one of the functions of valve applications. A throttle valve is installed at the inlet of the pipeline (outlet of the pump), and the flow rate or pressure of the medium in the pipeline is adjusted by changing the opening of the valve. The essence of throttling regulation is to change the resistance of the pipeline and change the steepness of the pipeline characteristic curve so as to achieve the purpose of changing the working point. 

The variable speed regulation is another function of the valve, and the variable speed regulation is adopted in the condition that the pipeline characteristic curve is unchanged Variable speed to change the pump performance curve, thereby changing the pump operating point adjustment. For the load torque and speed of the quadratic relationship between the centrifugal pump, variable speed control energy-saving most significant. Variable speed adjustment range should not be too large, usually the minimum speed of not less than 50% of the rated speed, usually 10% to 70%. When the speed is lower than 50% of rated speed, pump work efficiency drops obviously. When selecting a speed regulation device, it is necessary to consider various factors of technology and economy, comprehensively analyze and compare, choose the best and get the best result, and get the maximum economic benefit. Considering the production level, availability, maintenance ability and energy saving requirements of current speed governing devices in our country, we should choose a speed governing device to save energy that should be saved according to local conditions. 

A trap is an automatic control device that automatically discharges condensate from hermetically sealed containers that contain steam while maintaining fresh steam that does not leak and, if necessary, allows steam to pass at a predetermined flow rate. Steam is widely used in industrial and agricultural production and living facilities, whether in the steam pipeline system or in steam heating, drying, thermal insulation, disinfection, cooking, concentration, heat exchange, heating or air conditioning and other processes Condensate should be removed by the steam trap and not allowed to escape. 

Steam traps are important accessories for steam utilization systems. Their performance advantages and disadvantages play an important role in the normal operation of the system, the improvement of thermal efficiency of equipment and the rational utilization of energy. Choosing a trap is an important energy saving measure. Therefore, according to different working conditions, select the appropriate trap. In the event of the need to immediately rule out the condensation of water, such as turbo steam engine, steam pump, steam main pipe, etc., should not be used has a sub-degree of cold trap, such as pulse trap and thermostatic bellows trap. 

When the condensate is less than 15% of the rated maximum displacement, a pulse trap should not be used because steam is easily lost from the drain hole under these conditions. Intermittent operation of the indoor steam heating equipment and pipelines, the need to use good exhaust performance traps, such as inverted barrel or thermosyphon trap. Outdoor work of the trap, the general should not use mechanical trap.