Difference between pressure economizers and normal pressure economizers?

December 27, 2023

Energy is one of the key resources to support the development of society, and energy consumption is increasing day by day, making the efficient use of energy has become particularly urgent. Energy saver as a key technical means came into being, its role is to reduce energy waste through various ways to improve the efficiency of energy utilization.


Energy management has become an important issue for industrial boiler systems, and as two important components of energy management, pressurized and normal pressure economizer play an important role in optimizing energy use. Before we delve into the differences between pressurized and normal pressure economizer, let's first understand the concept of economizer.

What are pressure economizers and normal pressure economizers?


Pressurized economizer and normal pressure pressure economizer are two common types of energy saving devices that are widely used in different fields to achieve efficient use of energy.


Pressurized energy saver, as the name suggests, is an energy saving device that can work under pressure conditions. Its basic principle is to realize energy savings by adjusting the pressure of the fluid. In industrial production, pressurized economizer are often used to adjust the pressure in fluid pipelines to ensure that the system operates under optimal working conditions, thus achieving the purpose of reducing energy consumption.


Instead, normal pressure economizers are a class of energy saving devices that operate under normal normal pressure pressure conditions. The primary function of an normal pressure economizer is to achieve energy savings by reducing the flow of fluid in a system. This is usually accomplished by controlling valves or other regulating devices to ensure that the system provides enough fluid when it is needed and reduces the flow when it is not needed, thereby reducing energy waste.


Pressurized and normal pressure economizer are commonly used in industry


Pressurized and normal pressure economizer are widely used in industrial production, construction and many other application scenarios.


In the industrial field, pressurized economizer are usually used to control the pressure of steam and other fluids, while normal pressure economizer are commonly used in water supply systems, HVAC systems, etc., to achieve energy savings through reasonable flow regulation.


In the construction field, normal pressure energy saver is even more widely used in the water supply system, by reducing the flow to reduce water consumption, to achieve the goal of environmental protection and energy saving.

Characteristics and working principle of pressurized economizer:


One of the most important features of the pressurized energy saver is its suitability for high-pressure environments, which makes it particularly useful in industrial processes.

The operating principle of the Pressurized Energy Saver is based on fluid mechanics and control systems. When the pressure in a system exceeds a set threshold, the Pressurized Energy Saver will automatically activate to reduce the pressure in the system by adjusting valves or other control devices to restrict the flow of fluid. This self-adjusting mechanism allows the Pressurized Energy Saver to work stably in high-pressure environments, ensuring that the fluid system operates within safe limits while minimizing energy consumption.


Specific applications of pressurized economizer in industrial processes:


Power industry: Pressurized economizer play an important role in the power industry, especially in thermal and nuclear power plants. By regulating the pressure of the steam, pressurized economizer ensure that the steam is transferred to the turbine in an efficient and safe manner, thereby increasing the efficiency of power generation.


Chemical Production: Chemical processes often require high temperature and pressure environments to accomplish specific chemical reactions. Pressurized economizer are used in these environments to control fluid pressure and maintain the equilibrium of the reaction system to ensure a stable and controllable production process.


Oil and Gas Industry: In oil and gas pipeline transportation and refining processes, pressurized economizer help control fluid pressure in pipeline systems to ensure the safe delivery and handling of oil and gas.


Manufacturing: In high-pressure cutting, injection molding machinery and high-pressure air systems, pressurized economizer regulate fluid pressure to ensure proper equipment operation and reduce energy consumption.


Food and Beverage Production: In some food processes, high pressure steam or gas may be used for sterilization and pasteurization, and pressurized economizer help regulate the pressure of these fluids to meet the requirements of the process.



Characteristics and working principle of normal pressure economizer


Characteristics of normal pressure economizer: wide applicability, simple and reliable, energy saving and consumption reduction, with stable regulation performance, can maintain stable operation of the system under different working conditions.


The basic operating principle of the normal pressure economizer is to adjust and maintain stable operation of the system by controlling the pressure of the fluid. The pressure of the fluid through the system is controlled by adjusting the degree of valve opening. When the system pressure exceeds the set value, the valve gradually closes, reducing the flow rate and pressure of the fluid.



Specific applications of normal pressure economizer in industrial processes:


Heating Systems: normal pressure pressure economizers can be used in heating systems to achieve precise control of the heating system by adjusting the pressure of water or steam.


Air Conditioning Systems: In air conditioning systems, normal pressure pressure economizers help maintain proper refrigerant pressure and improve air conditioning efficiency.


Industrial production: In industrial production, normal pressure pressure economizers are commonly used in various production processes to ensure the smooth operation of the system under different working conditions.


Steam System: In the steam system, the normal pressure pressure economizer realizes precise control of the production process and reduces energy waste by controlling the pressure of steam.


Comparison of the performance of pressurized economizer and normal pressure economizer


Pressurized economizer:




Working in High Pressure Environments: Pressure-bearing economizer are suitable for systems that need to work in high-pressure environments and can effectively maintain the system in a high pressure range.

Precision Regulation: This type of economizer typically has a high degree of precision and is able to finely regulate fluid flux for applications with more stringent system pressure requirements.




Additional Air Source Required: Pressurized economizer may require an additional air source or compression device to operate, adding to the complexity and cost of the system.

Restricted Low Pressure Scenarios: Pressurized economizer may have limited performance in low pressure environments relative to normal pressure pressure economizer.


Normal pressure economizer:




Suitable for General normal pressure Pressure: The normal pressure saver works at general normal pressure without the need for an additional air source, making it more flexible and easier to install in different scenarios.

Simple and Reliable: Relatively simple principle of operation, low maintenance costs and high reliability in the system.




Not for High Pressure Scenarios: normal pressure economizers may not provide sufficient regulation range in high pressure systems, thus limiting their use in high pressure environments.

Relatively low accuracy: Normally pressurized economizer may have relatively low regulation accuracy compared to pressurized economizer.



Optimal use cases for pressurized and normal pressure economizer in their respective areas of application



Pressurized economizer field of application:


High-pressure gas systems: Pressurized economizer have a wide range of applications in high-pressure gas systems, such as oil and gas pipelines and high-pressure air systems.

Steam Boilers: Pressure Saving Devices are used to adjust and control the pressure in steam boilers to ensure an accurate supply of steam.


Best Use Context:


High Accuracy Required: Where highly accurate pressure regulation is required, such as in laboratory environments or high-tech manufacturing processes.

High Pressure Fluids: When a system is required to operate under high pressure fluid conditions, the Pressurized Energy Saver provides more precise regulation and control.



The field of application of normal pressure economizer:


Water supply system: The normal pressure energy saver is commonly used in urban water supply systems to ensure stable water pressure and reduce waste.

General Purpose Air Conditioning Systems: In general-pressure air conditioning systems, normal pressure economizers help maintain proper refrigerant pressure.


Best Use Context:


General industrial applications: normal pressure pressure economizer are a simple and practical solution for general industrial processes, such as general production facilities.

LOW TO MEDIUM PRESSURE: In low to medium pressure systems, normal pressure pressure economizers provide a cost-effective solution for energy conservation and regulation.


Guidelines for the selection of pressurized or normal pressure economizer


The key when choosing a pressurized or normal pressure energy saver is to make an informed choice based on specific needs and conditions. Below is a selection guide to help you determine which type of energy saver to choose when:


1. Working environment and stress requirements:

High Pressure Environments: If the system is required to operate in high pressure environments where high precision regulation of fluid flow is needed, then a pressurized energy saver may be more appropriate. For example, high pressure gas piping systems in the petrochemical industry.


General Air Pressure Environment: If the system operates in a general normal pressure pressure environment, where the pressure requirements are not very demanding and easy and reliable adjustment is needed, then an normal pressure pressure economizer may be more economical and practical.


2. Cost and complexity considerations:

Economical and practical: normal pressure pressure economizer are usually simpler and less costly than pressurized economizer. If the project budget is limited and high precision regulation is not required, normal pressure pressure economizers may be the more economical choice.


Maintenance Costs: Pressurized economizer may require an additional air source or compression unit, which may increase system complexity and maintenance costs. When considering maintenance costs, pressurized economizer may be more advantageous.


3. Precision requirements:

High Accuracy Control: If a system has stringent requirements for high accuracy control of fluid flow, pressurized economizer can often provide greater accuracy.


General Contorl: If the system has relatively low requirements for control accuracy and is more concerned with economy and simplicity, the normal pressure energy saver may be a more appropriate choice.


4. System stability and security:

Pressurized economizer may be more suitable if the system has high requirements for stability and safety and needs to maintain precise control of pressure under changing operating conditions.


5. Energy efficiency goals:

High Energy Efficiency Goals: If the system is pursuing very high energy efficiency and needs to be optimized for fluid flow control, a pressurized energy saver may help to more finely regulate energy consumption.


General Energy Efficiency Goals: If energy efficiency goals are relatively general and the focus is more on simplicity and maintenance costs of the equipment, normal pressure economizer may meet the requirements.


6. Industry standards and regulatory requirements:

Compliance Requirements: Industry-specific standards and regulations need to be considered, and some industries may have specific regulations regarding the type and performance of economizer. Ensure that the energy saver selected complies with the relevant standards and regulations.


Safety Requirements: If there are higher requirements for system safety in certain industries, pressurized economizer may be more compatible with the appropriate safety standards.




In general, pressurized economizer and normal pressure pressure economizer play irreplaceable roles in industrial boiler systems, and they are suitable for high-pressure and general pneumatic pressure system environments respectively. Pressurized economizer have high precision and large flow capacity, and are suitable for scenarios with high fluid pressure requirements, however, compared to them, normal pressure pressure economizer show simple, reliable and economical characteristics in general air pressure systems. 

When selecting the right economizer for a system, it is important to have a thorough understanding of the system requirements, fluid characteristics, and economic costs to ensure that the energy saver selected maximizes optimized energy use and improves the efficiency and sustainability of the system. This careful and informed choice will have a direct impact on the performance of the industrial boiler system and will provide us with an important step towards a more sustainable future.

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