The difference between low-pressure valves and high-pressure valves

The key differences between low-pressure and high-pressure valves lie in their operating pressure ranges, application scenarios, structural designs, and safety features. When selecting a valve, it is essential to match it to the actual requirements.  

**Pressure Range and Flow Characteristics:**  

- **High-pressure valves:** Have a nominal pressure range of PN10.0 to 80.0 MPa (approximately 9.81 to 78.48 MPa). They generate high output pressures and large flow rates, and the pressure can be precisely controlled using adjustment mechanisms such as pins.  

- **Low-pressure valves:** Have a nominal pressure of PN ≤ 1.6 MPa. They produce low output pressures and small flow rates; the pressure is usually fixed or can only be slightly adjusted. These valves are suitable for stable, low-pressure environments.  

**Application Scenarios:**  

- **High-pressure valves:** Are used in industrial applications involving high pressures, such as in thermal power generation, petrochemical industries, and the production of superhard materials. They must be capable of withstanding extreme pressures.  

- **Low-pressure valves:** Are commonly found in residential and small commercial settings, such as in household appliances like gas stoves and water heaters.  

**Structural and Design Differences:**  

- **High-pressure valves:** Have a more complex structure, featuring thickened valve bodies, self-sealing mechanisms, and wedge-shaped valve discs to enhance their pressure resistance and sealing performance. High-hardness alloys are often used in their construction.  

- **Low-pressure valves:** Have a relatively simpler structure and are smaller in size. The range of adjustment components (such as knobs) is limited, and these valves focus on cost-effectiveness and ease of use.

Tags: valves