Most Frequently Asked Questions about Industrial Control Valves


Over the past century, the control valve industry has experienced enormous expansion. Since they were particularly designed to meet standard standards, industrial control valves have become a crucial component of many Australian industries. Control valves are highly crucial and utilised in numerous process sectors to meet their flow requirements. But how do they function? What is the control valves' underlying mechanism? Do you find these queries bothersome? This article provides comprehensive information about control valves from globally recognised industrial control valve engineering consultants from SAROM GLOBAL. Read on.


1. What are Industrial control valves and why are they used?

Control valves are devices are utilised to regulate the direction and flow of fluids, which can be either liquids or gases with a variety of consistencies. It creates a flow path by fully, partially, or partially closing the valve's passage. A valve will allow fluid to pass from the side with higher pressure to the side with lower pressure if it is open. The valve may be sliding, rolling, or turned depending on the purpose and specifications.

Hundreds of control loops make up every industrial process plant, and these loops are connected to one another to form a network. A control loop is created to maintain the flow, pressure, level, and temperature of the process within the desired range. These loops all experience various internal instabilities. The process variable may be impacted by these disruptions.

To make up for the load disturbance, the control valve regulates the flow of gas, water, steam, and chemical substances. It aids in preserving the process variable's proximity to the targeted value.

2. What is the importance of using control valves?

Industrial control valves are extensively utilised in industries since they are used to regulate and control the flow of gases and liquids, as well as the flow of various chemical substances and steam. They are crucial because they can control load disturbance and account for the flow and pressure of liquids via the pipes. Utilising industry-standard high-standard valves allows for outstanding efficiency in managing the variable flow process.

3. Where are the valves required?

Industrial control valves are used in industries where extensive control over the flow, pressure, and direction of the liquid and gas is needed.

4. What is the control valve’s operating principle?

A control valve features an actuator that is positioned on the valve itself. By moving the valve plug, the valve typically controls the flow of the fluid. The valve stem that is connected to the actuator has this valve plug fastened to it. The external control device directs the movement of the stem through this actuator, which is electrically or pneumatically powered.

● Electric Actuators:
These systems, which are powered by motors, use an electric input signal to agitate the rotation of the motor shaft. This rotation is converted into a linear motion that powers the plug assembly and valve stem for flow modulation.

● Pneumatic Actuators:
By utilising an air signal from the external control device, these actuators produce a modulating control action. The air signal is distributed across the actuator's diaphragm after entering the actuator through a port. This diaphragm exerts pressure on the spring return assembly and the diaphragm plate, causing the plug assembly and valve stem to move downward and actuate the valve.

5. Do valves effectively handle the rate of flow?

Some valves have flow control characteristics; these features work to regulate the volumetric rates of liquids and gases passing through the valves. It functions by altering the size of the aperture, which will vary depending on how quickly liquid flows through it. When the valve is closed or opened, a needle in the orifice travels both inside and outside the valve. The phenomena allow for adjustment of the valve's flow rate.

6. How to reduce the rate of flow in valves?

The fluid pressure and tension can be regulated by increasing the fluid's pressure in the process based on the concept of a high-pressure inlet. In addition, fluid pressure is decreased by using the valve's outlet. When there is no flow or an underflow, they can be worked as needed to lower the flow rate.

7. What types of valves are used as flow control valves?

Flow control valves have numerous and varied industrial applications. Users must specify their needs, the circumstances, and the criteria before choosing the type of control flow valve they will utilize. However, the most frequently used industrial flow control valves for fluid control are globe valves, also known as ball valves, diaphragm valves, needle valves, and pinch valves.

8. What kinds of valves are used in chemical industries?

Chemical industries frequently use gate valves of various conduit types because chemicals require precise fluid and liquid flow. As a result, they provide them with a very steady and accurate rate of liquid flow through the valves. These valves are used wherever it is necessary for bulk materials to flow while being subjected to extremely high temperatures.

9. What is the importance of control valves in other industries?

Since they are widely used to regulate the flow of fluids, control valves are essential in a variety of sectors. These include the petrochemical, cosmetic, pharmaceutical, and biotechnological industries, as well as the oil, gas, marine, and other related industries.

10. Why are lubricants used in control valves?

The fundamental objective of a lubricant is to reduce surface-to-surface friction for the valves' active components. Without lubrication, the surfaces will come into closer contact with one another and generate more friction, causing damage.

11. What are the common problems faced by control valves?

If the control valve appears to be malfunctioning, one of the issues listed below may be the possible cause:
● Incorrect or defective accessories
● Loose mechanical linkages
● A missized or oversized actuator
● Additional friction on the valve actuator or valve body

12. Why y
ou should hire expert industrial control valve engineering consultants for control valve functioning assessment?

While working with control valves, there might be several reasons affecting their performance. But how would you identify them? Not everyone has the expertise to solve it. This is where you will require the advice of an expert industrial control valve engineering consultant. The industry expert will easily comprehend your issue and provide you with a solution that will quickly resolve the issue. Not to mention, industrial control valve engineering experts from SAROM GLOBAL are highly experienced and have years of expertise dealing with all types of control valve installation, maintenance, assessment, and remediation.

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