The stable operation of the boiler system is of utmost importance. As a key component, the condition of the valve is crucial to the safety of the system. Han Yu Boiler analyzes the common faults and causes of valves for you to help you maintain the equipment.
I. Air Leakage Faults
1. Problems with the Valve Core and Seat: Long-term use can lead to wear on the contact surface between the valve core and the seat, or impurities may get trapped in between, damaging the seal and causing air leakage. Regular inspection and cleaning are necessary.
2. Abnormalities of the Valve Stem: The wear between the valve stem and the bushing results in a large gap. In addition, a large gap between the spring and the valve stem, a bent valve stem, or an inclined installation of the valve stem can affect the closing of the valve, causing air leakage.
3. Skew of the Lever and Fulcrum: The skew of the lever and the fulcrum causes uneven force on the valve core and seat, accelerating damage and leading to seal failure and air leakage.
4. Decrease in Spring Performance: Permanent deformation of the spring, an uneven contact surface between the spring and the tray, an uneven plane of the spring itself, inconsistent lengths of the support rods, as well as a reduced cross-section due to corrosion, will all lead to insufficient spring force and cause air leakage.
II. Failure to Open When the Opening Pressure is Reached
1. Adhesion of the Valve Core and Seat: The medium in the boiler contains viscous substances or crystallizes, which can cause the valve core and seat to adhere, preventing the valve from opening.
2. Valve Stem Jamming: The small gap between the valve stem and the bushing makes it easy for the valve stem to jam due to thermal expansion, hindering the opening of the valve.
3. Insufficient Pressure on the Valve Core: Long-term leakage due to damage to the seal between the valve core and seat reduces the pressure on the valve core, making it impossible for the valve to open even when the predetermined pressure is reached.
4. Improper Adjustment: During the debugging process, if the spring is tightened too much or the weight is moved backward excessively, the opening pressure will be higher than the set value, and the valve will not operate.
III. Steam Discharge Before the Specified Pressure is Reached
1. Deviation in Adjusting the Opening Pressure: During the debugging process, if the spring is not tightened enough, the actual opening pressure of the valve will be lower than the specified value, resulting in premature steam discharge.
2. Change in Spring Performance: Permanent deformation of the spring reduces its load-bearing capacity, making it unable to maintain the closed state of the valve, resulting in premature opening.
3. Loose Fixation of the Weight: If the weight is not firmly fixed during installation and it shifts, the opening pressure will be changed, and the valve will discharge steam prematurely. Han Yu Boiler pays attention to every detail and provides support to users. Understanding these faults and their causes is conducive to daily maintenance and troubleshooting.
For more boiler-related knowledge, you are welcome to visit the official website of Han Yu Boiler at https://www.hanyuboiler.com/ to obtain more information.
