Guidance Of Selecting The Valve For Raw Water Treatment System

What Is a Raw Water Treatment System?

Raw water treatment system is a system used to treat natural water sources (such as river water, lake water, ground water, etc.). It usually includes multiple process steps designed to remove suspended solids, dissolved solids, bacteria, viruses and other contaminants to provide clean, safe and quality drinking or industrial water. The raw water treatment system plays an important role in ensuring the safety of drinking water, protecting the environment and water resources, and promoting sustainable development. It is not only related to human health and quality of life, but also to the sustainable development of society and the protection of the ecological environment.

Why Valves Are Importance For Raw Water Treatment Systems?

The main purpose of using valves in the raw water treatment system is to realize the control and adjustment of flow, pressure and flow direction, so as to ensure the normal operation of the system and the stable delivery of fluid. Valves play an important role in the raw water treatment system, and valves of different types and materials can be selected according to actual needs to meet the requirements of the system.

● Flow Control

Valves can be used to control the flow of fluid, and adjust the flow as needed to meet the operating requirements of the system. By opening or closing the valve, the flow rate and flow of the medium can be adjusted to realize the control and adjustment of the system.

● Pressure Control

The valve can be used to control the pressure of the fluid and adjust the pressure as needed to ensure the normal operation of the system. By adjusting the opening of the valve, the pressure of the medium can be adjusted to keep the system pressure stable within the design range.

● Flow-Direction Control

Valves can be used to control the flow of fluid and adjust the flow of fluid as needed to meet the requirements of the system. By opening or closing the valve, the flow direction of the medium can be changed to make it flow according to the predetermined path.

● Diversion & Confluence

Valves can be used to realize the diversion and confluence of fluids, and guide the fluids to different pipelines or equipment. By opening or closing different valves, the diversion and confluence of fluids can be realized, and the switching and distribution of fluids between different pipelines or equipment can be realized.

● Prevent Back flow

The valve can be used to prevent the reverse flow of the fluid and keep the flow direction of the system stable. By selecting a valve with the function of a reverse flow valve, the reverse flow of the medium can be effectively prevented and damage to the system and equipment can be avoided.

Valve Types For Raw Water Treatment Systems

Different process steps require different types of valves in raw water treatment systems. Below are some common valve types and their applications in raw water treatment systems.

● Shut-Off Valve

The switch used to control the fluid is often used in steps such as water source collection, pretreatment and water quality adjustment.

● Butterfly Valve

Applicable to large-diameter pipelines, used to adjust flow and prevent back flow, commonly used in coagulation and flocculation, sedimentation and filtration and other steps.

● Ball Valve

Used to quickly shut off fluid, commonly used in chemical dosing control during disinfection steps.

● Control Valve

Used to adjust flow and pressure, commonly used in coagulation and flocculation, disinfection and water quality adjustment steps.

● Gate Valve

It is suitable for large-diameter pipelines, used to adjust flow and cut off fluid, and is often used in sedimentation, filtration, disinfection and other steps.

● Check Valve

Used to prevent fluid back flow, commonly used in chemical dosing control during disinfection steps.

● Pneumatic Control Valve

The valve switch is controlled by a pneumatic actuator, which is commonly used in automatic control systems to adjust flow and pressure.

Among them, automatic valves play an important role in the raw water treatment system. Raw water treatment systems often require continuous monitoring and control to ensure water quality meets standards and meets water demand. Automatic valves can realize real-time monitoring and adjustment of flow, pressure, liquid level and other parameters by cooperating with sensors, controllers and actuators. Such as electric actuated valves, pneumatic actuated valves, automatic control valves and so on.

Tips For Selecting The Valve Materials

When selecting a valve, we need to comprehensively consider the chemical properties, temperature, pressure and other factors of the raw water to select the appropriate valve material.

● Corrosion Resistance

Various chemical substances and corrosive media may exist in the raw water treatment system, so the valve material needs to have good corrosion resistance, be able to resist the corrosion of chemical substances and prolong the service life of the valve.

● Wear Resistance

Raw water may contain particulate matter, such as sand, mud, granular pollutants, etc. These particulate matter will cause wear to the sealing surface and moving parts of the valve. Therefore, the material of the valve needs to have good wear resistance and be able to resist the wear of particulate matter. .

● Tightness

The material of the valve needs to have good sealing performance, which can effectively prevent fluid leakage. For the raw water treatment system, the sealing performance of the valve is particularly important to ensure the normal operation of the system and the control of the fluid.

● Temperature Range

According to the working temperature of the raw water treatment system, select the appropriate valve material to ensure that the valve can work normally within the required temperature range and will not cause material failure or deformation due to temperature changes.

Tips For Selecting The Valve Types

● Fluid Properties

Understand the nature of raw water, including temperature, pressure, flow, viscosity, corrosiveness, etc., to choose the appropriate valve material and type. Different fluid properties have different requirements on valves.

● Application Scenario

Consider the use environment and application scenarios of the valve, including pipe diameter, working pressure, temperature range, flow requirements, etc. Make sure the selected valve is suitable for the actual service conditions.

● Valve Type

According to the specific processing steps and control requirements, select the appropriate valve type, such as globe valve, butterfly valve, ball valve, regulating valve, etc.

● Valve Material

Select the appropriate valve material according to the characteristics of the raw water, such as stainless steel, cast iron, plastic, etc. Make sure the valve is corrosion-resistant, wear-resistant and has good sealing performance.

● Operation Method

According to actual needs, choose manual operation, electric operation or pneumatic operation valve. Considering the needs of automatic control, it may be necessary to choose a valve with remote control function.

Summarize

Raw water treatment system plays an important role in our human life. In order to make the system run smoothly and normally, the use of valves is necessary. We need to choose different valves according to different working conditions. If you have any needs for this, please contact us at sales@covnaactuator.com