The "invisible balance master" of industrial fluid control - do you really understand it?

In the field of industrial fluid transmission and control, there is a device that functions like an "invisible balancer", quietly maintaining the stability of system pressure. This device is the differential pressure valve. From gas transmission to hydraulic systems, the differential pressure valve can be found everywhere. But do you really understand its function, classification and applications?

I. Differential Pressure Valve: Why is it the "Pressure Balance Master" of the fluid system?

The differential pressure valve is primarily designed to maintain a stable pressure difference when fluid flows through it, ensuring that the pressure at the upstream and downstream ends fluctuates within the set range. Taking the CYF1 liquefied gas differential pressure valve shown in the figure as an example, the pressure difference is precisely set at 0.3 MPa. When the liquefied gas is transported through the pipeline, regardless of changes in flow rate (within the range of 5-50 L/min), the valve body's internal components such as the valve core and springs can automatically adjust to maintain the pressure difference at this value, thereby preventing equipment damage or poor fluid transportation due to pressure fluctuations.

This "balancing" capability is of crucial importance in scenarios requiring precise pressure control. For instance, in the gas supply system for household use, if the pressure difference is too large, it may cause unstable or even backfire in the stove flame; if the pressure difference is too small, there will be a situation of insufficient gas supply. The existence of the differential pressure valve is to eliminate these risks.

II. "Family Tree" of Differential Pressure Valves: How to Choose Based on Different Scenarios?

The differential pressure valve is not a "one-size-fits-all" product. Instead, it is divided into multiple types based on the medium, pressure level, and application scenario:

By medium: There are liquefied gas differential pressure valves, hydraulic oil differential pressure valves, gas differential pressure valves, etc. For example, the type liquefied gas differential pressure valve requires materials and sealing designs that are compatible with the chemical properties of liquefied gas to ensure explosion-proof and corrosion resistance.

By structure: It includes diaphragm type, piston type, spring type, etc. The spring type differential pressure valve uses the spring's pre-tightening force to set the pressure difference. It has a simple structure and quick response, making it suitable for medium-flow conditions.

By pressure level: It covers from low pressure (such as 0.1-0.5 MPa for civilian gas) to high pressure (10-30 MPa for industrial hydraulic systems). When selecting, it is necessary to strictly match the working pressure of the system (such as the working pressure of CYF1 is 1.8 MPa).

III. The "Practical Value" of Differential Pressure Valves: Multi-faceted Enhancement from Safety to Efficiency

The application of differential pressure valves is far more than just "maintaining pressure". The value it creates in industrial and civilian scenarios can be summarized into three points:

Ensuring system safety: In hydraulic equipment, differential pressure valves can prevent pipeline bursts and component damage caused by sudden pressure changes; in gas systems, they can avoid leakage and explosion risks caused by uncontrolled pressure.

Improving transmission efficiency: A stable pressure difference is the basis for efficient fluid transmission. Taking the CYF1 liquefied gas differential pressure valve as an example, the flow range of 5-50L/min covers the needs of most liquefied gas equipment. The stable pressure difference makes the flow output more uniform, reducing the transmission losses caused by pressure fluctuations.

Simplifying system design: The "automatic adjustment" feature of differential pressure valves allows the system to not need to be equipped with complex pressure regulation devices, reducing equipment costs and maintenance difficulty. For example, in the pipeline network of a liquefied gas station, one differential pressure valve can meet the pressure balance requirements of multiple users.

The differential pressure valve, this seemingly insignificant industrial component, is actually the "guardian of the heart" of the fluid system. From the stable supply of household gas to the efficient operation of industrial hydraulics, it supports the safety and efficiency of countless scenarios with its "balancing power". The next time you encounter a problem with fluid pressure control, why not think about this: Have you chosen the right differential pressure valve for your system?