Instrument Valve High Temperature & Pressure Life Test Device
This test device is specially developed and produced for the performance testing of nuclear-grade instrument valves. It is mainly used for pressure resistance performance test, sealing performance test, switch action life test and other tests of nuclear-grade instrument valves. Among them, the switch action life test refers to the switch action life test of the valve under no-load and load conditions to verify the life of valve-related parts under the response conditions. According to different working conditions, it is divided into cold test machine hot test; pressure resistance performance test and sealing performance test refer to the test of the valve under the test pressure to test the tightness of the valve body and valve cover and the pressure resistance of the entire shell including the connection between the valve body and the valve cover, and to test the sealing performance of the opening and closing parts and the valve sealing pair.
Equipment-related design standards and specifications:
GB/T13927-2008 "Industrial valve pressure test" ;
ASME OME-1-2002 "Evaluation of Dynamic Mechanical Equipment in Nuclear Power Plants":
JB/T 9092-1999 "Inspection and testing of valves";
Mandatory standards of other countries regarding design, manufacturing, safety, environmental protection, etc.
The device can realize the following functions:
1. Temperature realization:
First start the electric pump to fill the preheating container and system circuit with water:
Back pressure valve adjusts pressure to 17.5MPa:
Start the booster pump to increase the system pressure to 17.5MPa;
Start the heater in the preheat container:
After the temperature rises to 340℃, stop heating and use the temperature controller to maintain the inlet and outlet temperatures of the tested valve at 340 ± 5℃: turn on the cooling water to maintain the temperature of the back pressure valve and the air control valve at a lower temperature ;
The system achieves dynamic circulation while maintaining pressure and temperature.
2. Sealing performance:
Stop the booster pump under pressure and temperature, maintain the front end pressure, open the rear end V3 valve, and unload the rear end pressure to 0; observe whether there is water flowing out through the pressure drop or open the valve V5 to determine whether the valve is leaking.
3. Hot action test
Action mode 1: Perform the following actions after the pressure and temperature are reached
When the pipeline is full of pressure, close the valve under test → unload the pressure at the rear end to 0 → open the valve under test at a certain angle under the full pressure difference → the pressure in the pipeline increases to 17.5MPa → close the valve under test → unload the pressure at the rear end to 0.
Action mode 2: Maintain constant pressure and temperature and repeatedly open and close the valve.
4. Cold action test
Action mode 1: Perform the following actions after the pressure is reached
When the pipeline is full of pressure, close the valve under test → unload the pressure at the rear end to 0 → open the valve under test at a certain angle under the full pressure difference → increase the pressure in the pipeline to 17.5MPa → close the valve under test → unload the pressure at the rear end to 0.
Action mode 2: Maintain the pressure and open and close the valve repeatedly.
