High-pressure and low-pressure ball valves differ significantly in pressure ratings, applications, safety features, material structure, and flow control. The following is a key comparison (using descriptive summaries instead of tables):
Pressure Rating Differences:
Low-pressure ball valves typically have a nominal pressure of 1.6 MPa or less and are designed for use in moderate pressure environments, such as household gas stoves or water supply systems, where the output pressure is stable and limited.
High-pressure ball valves have a pressure range of 10–80 MPa and are suitable for use in extreme conditions, such as oil pipelines or industrial boilers. High-pressure output can be dynamically controlled by adjusting the ejector pin (screwing it in for pressure increase and out for pressure reduction).
Application Targets:
Low-pressure ball valves are designed for low-power applications such as household water heaters, HVAC systems, or residential water supply systems, ensuring stability and economy for daily use.
High-pressure ball valves are designed for high-load applications, including commercial high-fire stoves (in hotels and restaurants), petrochemical pipelines, or power systems, handling heavy loads.
Safety Performance Comparison:
Low-pressure ball valves have low pressure and slow flow rates, resulting in a lower risk of leakage. Even in the event of a valve failure (e.g., a loose screw), the amount of gas released is controllable, providing greater safety.
High-pressure ball valves have high pressure and high flow rates, making leaks highly susceptible to explosions (e.g., rapid diffusion of gas during ignition failure). Therefore, they require complex safety devices (e.g., pressure-sealing valves or overcurrent cutoffs).
Material and Structural Design:
Low-pressure ball valves have a simple structure and commonly use aluminum alloy or rubber seals (e.g., JYT-0.6 type), which are low-cost and easy to maintain.
High-pressure ball valves require high-strength materials (e.g., stainless steel, carbon steel), and seals employ metal-hard seals or composite structures to withstand high pressure and wear.
Flow Rate and Adjustment Function:
Low-pressure ball valves have a low flow rate (≤0.6 m³/h) and are suitable for precise flow control. Their fixed pressure design reduces the risk of misoperation.
High-pressure ball valves offer high flow rates and are adjustable (via a pin), enabling quick response to high flow demands. However, regular inspections of the seals are required to prevent overpressure.