Product Overview

It is installed on the pipelines of high-rise buildings, fire water supply systems and other water supply systems. When the pressure in the water supply pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve will open automatically to release pressure quickly, thus protecting the safety of the pipeline.

Main Features

• Adopts a diaphragm structure, ensuring sensitive pressure response and reliable sealing performance.
• Integrates pressure holding and pressure relief functions, suitable for maintaining stable pressure in water supply systems.
• Automatically opens to relieve pressure when the system pressure exceeds the set value, protecting pipeline safety.
• Simple structure, convenient for installation, operation and later maintenance.

Working Principle

When the system pressure is lower than the set pressure, the diaphragm is pressed by the spring, keeping the valve closed to maintain the system pressure. When the system pressure exceeds the set pressure, the fluid pressure pushes the diaphragm upward, compressing the spring and opening the valve to discharge the excess fluid. As the system pressure drops to the set value, the spring rebounds to press the diaphragm, closing the valve and restoring the pressure-holding state.

Structural Features

• Mainly consists of core components such as valve body, diaphragm, spring and pressure-adjusting mechanism.
• The diaphragm serves as a key pressure-sensing and sealing part, directly responding to system pressure changes.
• The spring provides stable pre-tightening force to control the opening and closing of the valve based on pressure differences.
• The pressure-adjusting mechanism allows easy setting and adjustment of the system’s rated pressure.

Maintenance

• Check hydraulic oil level annually
• Test closing time every 6 months
• Inspect disc and seat for wear during system shutdowns
• Lubricate adjustment mechanism yearly
• Verify proper operation after system pressure changes