DYFJ-AQ Safety Hydraulic Valve Test Bench

Key Features and Performance
1. Versatility in Testing: The DYFJ-AQ is capable of testing both flange-connected and threaded safety valves, making it a versatile tool for various industrial applications.

2. Configurable Workstations: The equipment is available in single and double workstation configurations, allowing for flexibility in operation and throughput.

3. Hydraulic Clamping System: Utilizes hydraulic cylinders to clamp the valve flanges, ensuring that the valve under test is not subjected to any external forces that could affect the test results.

4. Dual Media Testing: Supports testing with both water and gas as media. The water used in testing is recyclable, and the system includes pipeline control valves for easy switching between media.

5. Pumping System: Equipped with a low-pressure rapid water pump and a high-pressure slow-increase water pump, the system automatically enters a pressure-holding timing mode once the test pressure is reached.

6. Gas Boosting System: Includes a gas boosting system for tests requiring higher pressure levels.

7. Zero-Pressure Safety Protection: Features a safety protection system that ensures the clamping jaws can only be released and the valve removed when there is no pressure inside the valve cavity.

8. Optional Features: Customers can opt for additional features such as safety doors and specialized valve detection systems, including PLC data acquisition and automatic testing systems.

9. Customization: The DYFJ-AQ model can be customized to meet non-standard requirements, providing tailored solutions for specific testing needs.

Functional Description
The DYFJ-AQ Safety Valve Calibration Bench employs a flange-end positioning method, with clamping jaws securing the back of the flange to seal the end face. This method ensures that no additional external forces affect the test results, adhering to standard valve testing protocols.
The clamping system is designed with radial and axial movement capabilities, driven directly by hydraulic cylinders. This design ensures uniform force distribution on the valve sealing surface, providing reliable and consistent clamping. The bench supports both water and gas testing, allowing for comprehensive inspection of valve sealing performance and observation of sealing conditions.

Testing Procedures
1. Water Pressure Testing:
Mount the test valve.
Adjust the hydraulic cylinder clamping force based on the pressure chart.
Set the electronic control pressure gauge (low pressure: 0-1.5MPa, high pressure: as per test requirements).
Open the water inlet valve, close the gas inlet valve, and open the water discharge valve.
Start the water pump.
The system will automatically stop and hold pressure.
Open the water discharge valve to release pressure to zero.
Remove the test valve.
Testing complete.

2. Gas Pressure Testing:
Mount the test valve.
Adjust the hydraulic cylinder clamping force based on the pressure chart.
Set the electronic control pressure gauge (upper limit pressure: 0-16.0MPa).
Open the gas inlet valve and close the water discharge valve.
Start the gas booster pump.
The system will automatically stop and hold pressure.
Open the gas discharge valve to release pressure to zero.
Remove the test valve.
Testing complete.

Important Notes
The gas boosting system includes a pre-stabilization tank. Charging to 3.0-5.0MPa is sufficient for the gas-driven pump to operate effectively (boosting up to 0-16.0MPa). Rapid charging should not exceed 5.0MPa to prevent equipment damage and ensure operator safety.

The equipment features a four-gauge system, displaying pressures separately with high precision: high pressure (0-60MPa), medium pressure (0-16MPa), low pressure (0-4MPa), and micro pressure (0-1.6MPa).

Valve type: flange safety valve, threaded safety valve
Pressure range: See the working test pressure gauge
Test media: water and gas
Hydraulic pressure boost range: 0-40.0Mpa
Air pressure boost range: 0-16.0Mpa
Voltage: 380V
Frequency: 50Hz
Motor power: 5.5Kw/6P