Control Valve Applications and Work Processes
Control valves gotten from control valves supplier are instruments used to monitor the flow, pressure, temperature, and level of fluids within pipelines. This type of component is recommended for use in locations with abrasive, acidic, corrosive, or hazardous conditions.
We can mention the chemical industry, where care is more rigorous due to the material that circulates inside the tube. However, its installation is not restricted to this area only. It can also be found in agriculture, biofuels, construction, mining, pharmaceuticals, etc.
It is noteworthy that the control valves must meet the international standard requirements for valves and have an adequate infrastructure to prevent leaks that jeopardize the safety of people.
One of the significant differentials of this component is related to the ways it can be handled. They are:
- Electronics;
- Hydraulics;
- Pneumatics;
- Manual.
We can already say that a wide range of products can be installed in your project.
How a Control Valve Works
To recap, control valves gotten from the control valves supplier are used to regulate fluid flow by opening and closing internal passages, which work as follows:
- The actuator moves the valve stem, either electrically or pneumatically;
- The pressure between the inlet and outlet defines the amount of flow that passes through the valve;
- When the valve is closed, a reduction in flow occurs;
- Reduction results in backpressure and increases the difference between inlet and outlet pressures.
What Types of Control Valves?
This topic will cover the subcategories of control valves, divided into three aspects: regulation, flow, and pressure control. Understand more about each of them and their applicability:
Valves For Regulation
Globe: indicated for use in gas pipelines, as they control the flow of more viscous fluids, such as oil. The ball-body valve is separated by a deflector, while the automated ones have sliding stems.
Angular: recommended for blocking, commanding, dosing, and controlling liquid or gaseous fluids. They are also suitable for applications involving high differential pressure, as they are resistant to cavitation, reduce noise due to flow, and are used for a microflow.
Diaphragm: work manually or automatically and can be used in the food, beverage, biotechnology, and pharmaceutical industries.
Flow Valve
It is indicated for total or partial obstruction of the flow. The piston-type prevents the counterflow of fluids, being applied in steel, mining, biofuels, among other segments.
Pressure Control Valve
It is recommended to control the pressure of the flow that can pass through it and have different applications. There are two models: safety and relief. The first is suitable for different contexts, but it needs professional help. At the same time, the second has systems to produce dry and clean steam at high pressures.
We saw how control valves are essential to regulate the flow that passes through the pipes, especially in the chemical industry, where the processed material can be toxic.
Furthermore, this component can be separated into three subcategories, demonstrating the variety of products that can be used in other industrial sectors covered by your business.
Control Valve Basics
Valves are mechanical devices. However, they are the essential elements responsible for allowing regulation by manipulating the variables according to the needs of each operational unit. Its typical use is flow control by regulating the amount of fluid that flows through a given process.
Main functions performed by valve:
- Allow, interrupt or isolate the flow passage of a fluid;
- Control or restrict the amount of flow by varying the valve stroke, in this condition, adjusting the volume;
- Checks flow allows flow in only one direction, and this function characterizes flow direction. (Retention valve);
- Regulating the pressure downstream of the process or relieving the overpressure in the piping (Safety Valve / Relief).
