The Function of Each Valve
Each type of valve has very particular characteristics, although some have very similar applications. To illustrate some of the models of valves in the industrial sector, we developed a demonstration framework to identify the functions of each piece:
- Butterfly Valve, the butterfly valve can be used in different situations, such fluid control passage or total isolation flows. Usually they have a lower cost than other types of valves and have a similar operation of the ball valve. Used in pressure systems, it has good performance in fire-fighting equipment to have a fast and effective shutdown device.
- Needle Valve, the needle valves receive this name because they are designed with metal needle, in most cases, made of stainless steel, bronze or other alloy steel. Are employed and all industrial sectors, with varying applications. In aerospace, instrumentation control and cooling for power generation.
- Globe Valve, is a type of valve commonly used in pipelines for controlling the flow of more viscous fluids such as oil. The valve angle globe is indicated for blocking, control, dosage and control of liquid and gaseous fluids. Has spherical body, separated by a baffle, and automated valves have sliding rods.
- Gate Valve, the gate valves, or drawer records, are used in industrial facilities and also have domestic applications, and can be produced in cast iron, stainless steel, bronze and other alloys. Usually they are developed and designed for use in sanitary engineering in sewage pipes, working in perfect condition when under pressure and at temperatures not exceeding 60°C.
- Solenoid Valve, solenoid valves are applied in fluid power pneumatic and hydraulic systems to control the cylinders, hydraulic motors or more industrial valves. It is specific to control flow of liquid or gas, being one of the most widely used devices for flow control and fluid. They also provide fast and safe switching, high reliability, durability and compatibility with other materials.
- Piston Valve, the retention piston type valve prevents backflow fluid, i.e., after the flow passes through the pipe, the valve piston does not allow this same flow back through the pipe, which would affect the pump and cause flooding.
- Injection Valve, the injection valve is an important tool in electronic fuel injection systems. This device is applied to the fuel injection in the form of sprayed jets, directed at the engine inlet duct or in the combustion chamber, providing better engine performance, which considerably reduces the pollutant emission rates.
- Stop Valve, this valves are one of the most important devices for the full operation of the pipelines. The lock valve blocks and controls the flow of all types of fluids in pipes and trestles, such as gas, vapor, oil and water systems. Shutoff valves can be subdivided in several models: check valve, two-way valve and line break protection valve.
- Foot Valve, normally, the foot valve is displayed right next to the suction pipe, only behaving the passage of flow in one direction, upward. It is widely used in the chemical industry to control flow and fluid, particularly the chemical fluids. Lighter and stronger, the foot valve or suction is perfect to save energy in suction pumps. The foot valve or sieve was developed in order to prevent backflow of the product to the main pump or compartment in case of maintenance or leaks.
- Air Valve, the main function of the air valve is to retain the air passing through the channels along with water, also so that there is enough water saving. Widely used in construction, the air valve is affixed to trestles together with the hydrometer to control more precisely the inlet and cause the water to flow normally through the channels.
- Flow Ring Valve, the annular flow valves may have different types of drive, including manual, pneumatic, mechanical and hydraulic, depending on how they are used and the need to handle the device. This device is designed for hydraulic control, and its main functions are: water level control, flow control and reduction or sustaining pressure.
The valves are components of equipment and supplies for important industries. Usually they account for between 5 and 10 percent of capital expenditures in most production sectors. The process industries can be considered the largest share of end users of all types of valves and can be divided into three categories: Process manufacturers (chemical, oil refining, food and beverage, pulp and paper and other related industries) , resource industries (crude oil and natural gas, and mining) and utilities (electricity, gas, water, sewage and sanitation). Other end users of industrial valves include the sectors of shipbuilding and steel.
The global demand for industrial valves is determined by a wide range of variables. Clearly one of the main determinants are the capital spending patterns of the major groups of end users. The industrial demand valve is therefore quite cyclical and depends on general economic conditions conducive to stimulate capital investment in end-use markets. In addition, factors such as price, availability and public acceptance of various energy sources (eg hydro, nuclear, coal, natural gas, etc.) affect the overall valve demand.