Heat Pump and Valve Sealing Test
Top Sealing Performance Test
For the heat pump and valve, the top sealing test requires fully opening the valve, injecting the test medium into the valve chamber, gradually increasing the pressure to the specified pressure, and holding the pressure for the corresponding time. During this process, pay close attention to the connection between the valve stem and the valve cover to confirm there are no signs of medium leakage. This test is a crucial step in ensuring the overall sealing performance of the heat pump and valve, effectively preventing medium leakage due to valve stem seal failure and ensuring a stable internal environment during equipment operation.
Low-Pressure Sealing Performance Test
The heat pump and valve undergoes a low-pressure sealing test using a pneumatic method, typically using clean air at 0.4 to 0.7 MPa as the medium. After closing the valve, inject the medium from one end and apply leak detection fluid to the other end, carefully checking for air bubbles. Alternatively, the valve can be immersed in a water tank to observe for air bubbles. This test aims to verify the sealing reliability of the heat pump and valve under low-pressure conditions, ensuring that medium leakage will not occur under normal operating pressure conditions.
High-Pressure Sealing Performance Test
The high-pressure sealing test uses water as the primary medium, pressurizing it to 1.1 times the nominal pressure of the Heat Pump and Valve. During the test, the valve is first partially opened to flush out impurities inside the valve chamber. Then, the valve is closed, and pressure is applied from one side while monitoring for leakage on the other side. During the pressure holding period, the pressure gauge reading must be closely monitored. If the reading is stable and there is no visible leakage on the valve body surface, the high-pressure sealing performance of the Heat Pump and Valve meets the standards and can satisfy the system's operational requirements under high-pressure conditions.
Dynamic Sealing Performance Test
This test simulates the dynamic operating conditions of the Heat Pump and Valve in actual operation, performing reciprocating motion wear tests and compression set analysis. By simulating the friction of the seals during valve opening and closing, the relationship between wear rate and leakage is quantified; simultaneously, the resilience of the sealing material after long-term compression is measured to predict the aging failure threshold of the gasket. This test comprehensively evaluates the sealing durability of the Heat Pump and Valve under dynamic operating conditions, ensuring the long-term stable operation of the equipment.
