The online calibration equipment for safety valves is a specialized device used to detect and calibrate performance parameters such as opening pressure and reseating pressure of safety valves. Unlike traditional safety valve calibration methods, online calibration equipment allows for direct detection and calibration of safety valves without disassembling them, greatly improving calibration efficiency and reducing production downtime caused by disassembly.
The equipment does not need to dismantle the safety valve during testing, and can be verified directly in the operating system. Measuring parameters such as opening pressure and reseating pressure of safety valves with high accuracy and reliable data. The equipment can record the entire process data and generate reports for future analysis and archiving. Can draw pressure time curves to visually display the performance of safety valves. The equipment mainly consists of the following parts.
Main control unit: The main control unit is the core of the entire system, responsible for controlling the verification process and processing and recording data. Generally equipped with an operating interface for technicians to set verification parameters, start verification programs, etc.
Pressure sensor: used to measure the actual pressure in pipelines or equipment. High precision pressure sensors can ensure the accuracy of calibration results.
Signal conditioning module: condition the signals collected by sensors for accurate reading and processing by the main control unit.
Data collection and recording system: Real time collection and recording of various data during the verification process. Usually, data is presented in the form of curves or charts for easy analysis.
Interface and connecting pipeline: used to connect the calibration equipment with the safety valve to ensure airtightness and safety during the measurement process.
When using, connect pressure sensors, pumps, and other equipment to the system where the safety valve is located, ensuring a tight connection and no leakage. According to the rated pressure of the safety valve, set the testing parameters for the calibration equipment, including target pressure, pressure rise rate, etc. Start the equipment, gradually increase the pressure to the opening pressure of the safety valve, and record the pressure values for opening and reseating. Analyze whether the opening pressure and reseating pressure of the safety valve are within the specified range based on the pressure data automatically recorded by the equipment. After verification is completed, turn off the device, save the data, and perform a system reset operation. The following is the general usage method for online calibration of safety valves:
1. Preparation work
Check the equipment: Before use, ensure that all components of the online verification equipment are intact, securely connected, and leak free.
Check the environment: Ensure that the environment at the verification site meets safety requirements, especially that there are no flammable or explosive materials around.
Preparation of calibration parameters: Understand the basic information such as the rated opening pressure, model, and structure of the safety valve to be calibrated, in order to set the correct calibration parameters.
2. Connect the verification device
Installation of sensors: Install the pressure sensor of the online calibration equipment onto the discharge port of the safety valve or the nearest detection point, ensuring a tight connection between the sensor and the system to avoid air leakage.
Connect the data cable: Connect the sensor's data cable to the host of the verification device to ensure normal signal transmission.
Connect power supply: Connect the device's power supply and check if the power indicator light is working properly.
3. Verification operation
Set parameters: Based on the rated parameters of the safety valve, input the corresponding calibration pressure, temperature, and other parameters on the calibration equipment.
Start the system: Start the calibration equipment to gradually increase the pressure to the opening pressure of the safety valve, while monitoring the pressure changes in real time.
Record data: When the safety valve is opened, record its actual opening pressure and compare it with the preset opening pressure to evaluate the performance of the safety valve.
4. Result analysis and adjustment
Data analysis: Based on the data recorded by the verification equipment, analyze whether the key parameters such as the opening pressure and reseating pressure of the safety valve are within the allowable range.
Adjustment and correction: If the verification result does not meet the requirements, it may be necessary to adjust or repair the safety valve to ensure that it meets the usage requirements.
Repeat verification: If necessary, perform multiple verifications to ensure the reliability of the safety valve.
5. Complete verification
Disconnect: After the verification is completed, turn off the verification device in order, disconnect the power, and remove the sensor and data cable.
Record keeping: Record and save the verification data to form a formal verification report for future reference.
Equipment maintenance: Clean and inspect the calibration equipment to ensure that it is in good standby condition.
6. Safety precautions
Pressure control: During the calibration process, pressure should be monitored at all times to prevent exceeding the system or equipment's capacity.
Protective measures: Operators should wear appropriate protective equipment, such as goggles, gloves, etc., to avoid accidental injuries.
Emergency handling: If any abnormalities occur during the verification process, the operation should be stopped immediately, the system pressure should be reduced, and the cause should be investigated.
The correct use of safety valve online calibration equipment can effectively ensure the performance of safety valves and prevent safety hazards in industrial production.
Ensure that operators are familiar with the operating procedures of the equipment and wear appropriate protective equipment during the calibration process. During the verification process, pressure should be strictly controlled to prevent equipment or system damage caused by overpressure. Ensure that the equipment operates under specified environmental conditions, such as temperature, humidity, etc. Online verification equipment is widely used in industries such as petrochemicals, power, and pharmaceuticals, which helps maintain the safety and reliability of the system.