Tips For Selecting The Valve For Boiler Feed Water System

What Is a Boiler Feed Water System?

Boiler feed water treatment system refers to a series of processes and equipment for treating boiler water supply to ensure the normal operation of the boiler and prolong the service life of the boiler. The main purpose of the boiler feed water treatment system is to prevent the formation of scale, corrosion and deposits inside the boiler, as well as to reduce the boiler’s water level fluctuations and water quality changes. This improves the heat transfer efficiency of the boiler, reduces energy consumption, and reduces the frequency of maintenance and repairs.

Source by: evoqua.com

Why Boiler Feed Water System Needs Valves?

Valves play a role in controlling and regulating flow, pressure and water level in the boiler feed water system to ensure the normal operation and safety of the system.

● Flow Control

Valves can be used to regulate and control the flow of water to ensure that the water flow in the boiler feed water system meets the needs. For example, the water inlet valve can control the flow of water by adjusting the opening to meet the needs of the boiler.

● Pressure Regulation

The valve can control the pressure in the system by adjusting the opening to ensure that the pressure of the boiler feed water system is within a safe range. For example, a regulator valve can control the pressure in a system by adjusting the opening of the valve.

● Water Level Control

The valve can be used to control the water level of the boiler to ensure that the water level is within the proper range. For example, a water level control valve can control the water level of a boiler by adjusting the water intake.

● Safety Protection

The valve plays the role of safety protection in the boiler feed water system. For example, a safety valve can automatically open when the system pressure exceeds a set value, releasing the excess pressure and protecting the boiler from damage.

● Maintenance And Emissions

Valves can also be used for maintenance and draining of the system. For example, blowdown valves can be used to drain waste water and sludge from boilers, keeping the water clean.

What Types Of Valves Can Be Used In Boiler Feed Water Systems?

● Globe Valves

Globe valves are mainly used to cut off or open fluid passages, and are suitable for occasions where fluid flow needs to be completely cut off. The globe valve has the characteristics of simple structure, good sealing performance and small flow resistance, and is suitable for large flow and high pressure situations.

● Control Valves

Regulating valves are mainly used to adjust the flow and pressure of fluids, and are suitable for occasions that require precise control of flow and pressure. The control valve has the characteristics of wide flow adjustment range, good sealing performance and high reliability, and is suitable for systems that require frequent adjustments.

● Ball Valves

Ball valves are mainly used to cut off the passage of fluid, and are suitable for occasions where fluid flow needs to be cut off quickly. The ball valve has the characteristics of easy operation, good sealing performance and small flow resistance, and is suitable for high flow and high pressure systems. The structure of the ball valve is simple, easy to maintain, and has a long service life.

● Butterfly Valves

Butterfly valves are mainly used to adjust the flow of fluid, and are suitable for occasions that require rapid flow adjustment. The butterfly valve has the characteristics of simple structure, quick operation and small flow resistance, and is suitable for large flow systems. The butterfly valve has good sealing performance, can achieve zero leakage, and has a small volume and weight.

In some boiler feed water systems that require automatic control, it may be necessary to use electric actuator valves or pneumatic actuator valves. These actuators can realize remote control and automatic operation of valves, improving the degree of automation and operating efficiency of the system. At the same time, it is also necessary to consider the control mode of the actuator and the compatibility of the interface with the system.

● Electric Actuated Valves

The electric actuator valve drives the opening and closing action of the valve through the electric actuator, and can remotely control the opening and closing state of the valve through electrical signals. Electric actuator valves are suitable for systems that require frequent control and regulation, and can achieve precise flow and pressure control.

● Pneumatic Actuated Valves

The pneumatic actuator valve drives the opening and closing action of the valve through the pneumatic actuator, and the opening and closing state of the valve can be remotely controlled through the air source signal. Pneumatic actuator valves are suitable for systems that require high-speed response and fast control, and can achieve rapid flow and pressure regulation.

Tips For Selecting The Valve For Boiler Feed Water System

● Temperature & Pressure Requirements

Boiler feed water systems usually involve high temperature and high pressure conditions, so it is necessary to select valves that can withstand high temperature and high pressure. Make sure the valve material and seal material are capable of withstanding the operating temperature and pressure of the system.

● Flow Rate Requirements

According to the flow requirements of the boiler feed water system, select the appropriate valve size and type. Make sure the valve is capable of meeting the flow control needs of the system.

● Control Method

Boiler feed water systems usually need to realize automatic control, so electric actuator valves or pneumatic actuator valves need to be selected. Make sure the valve is operated in a manner compatible with the system’s control system.

● Sealing Performance

The boiler feed water system has high requirements on the sealing performance of the valve to ensure the normal operation of the system and leakage control. Choosing a valve with good sealing performance can effectively prevent leakage and energy consumption.

● Maintenance

Considering the long-term operation and maintenance of the boiler feed water system, choosing valves with simple structure and easy maintenance can reduce maintenance costs and work risks.

Summarize

When selecting a valve for a boiler feed water system, key factors such as temperature, pressure, flow and control method need to be considered. First of all, it is necessary to ensure that the valve material and sealing material can withstand high temperature and high-pressure conditions. Second, select the appropriate valve size and type based on the flow requirements of the system. At the same time, considering the control mode of the system, choose electric actuator valves or pneumatic actuator valves to realize automatic control.

In addition, the sealing performance is very important for the normal operation and leakage control of the boiler feed water system, so choose a valve with good sealing performance. Finally, the maintenance and maintenance of valves should also be considered, and valves with simple structures and easy maintenance should be selected to reduce maintenance costs and work risks.

To sum up, choosing the right valve is crucial to the safe operation and performance of the boiler feed water system. It is recommended to consult a professional valve supplier or engineer to obtain accurate selection advice and technical support. Anything we could help, feel free to consult us at sales@covnaactuator.com