1. Mandatory inspection items before delivery

1. Appearance and structure inspection
Inspection content: Check the actuator housing for cracks, deformation, and damage, ensuring that the surface coating is uniform and free from peeling, paint loss, and rust; the equipment nameplate is complete and clear, and the model, torque, voltage, protection level, and parameter information are consistent with the factory documentation; the wiring cavity is sealed properly, and the fasteners are complete and tightened in place; the handwheel and manual operating mechanism rotate smoothly, and the manual and electric clutch devices switch flexibly and reliably, without any clamping stagnation, slipping, or jamming.
Judgment criteria: The overall appearance of the machine should be intact, the structure should be neat, the mechanical operation should be smooth, and there should be no assembly defects or transportation damage.

2. Insulation resistance test

Test content: Use a megohmmeter to test the insulation resistance values between motor winding phases, between the motor and the ground, and between the control circuit and the ground.

Judgment criteria: Insulation resistance ≥ 20MΩ under normal temperature conditions; ≥ 5MΩ under humid working conditions. If the insulation value does not meet the standard, power-on use is prohibited.

3. Withstand voltage (dielectric strength) test

Test content: Apply a standard AC voltage to the actuator's electrical circuit, maintain the voltage for 1 minute, and observe the equipment status throughout the entire process.

Judgment criteria: No phenomena such as breakdown, flashover, abnormal heating, or abnormal noise are present, and the electrical insulation performance is qualified. The test voltage for conventional low-voltage actuators is 1500V.

4. No-load operation test

Test content: Power on the equipment with no load, test the full opening and closing actions, verify the valve direction and travel status; observe the equipment start-stop status, operating noise, and body stability, and record the full-stroke opening and closing duration.

Judgment criteria: The action should be smooth without shaking, abnormal noise, or clamping stagnation; the steering should be accurate, and the electrical and mechanical limits should be precise; the opening and closing duration should meet the requirements on the nameplate and in the technical agreement.

5. Limit and torque protection function test

Test content: Conduct separate tests on the dual functions of travel limit and torque overload protection. Simulate the valve in-place condition to test the start-stop effects of electrical and mechanical limits; simulate locked-rotor and overload conditions to test the triggering performance of torque protection.

Judgment criteria: The dual limit action should be sensitive and precise in place, capable of automatically powering off and stopping the machine; under overload conditions, the torque protection should trigger accurately, promptly cutting off the motor power supply, effectively protecting the valve body and actuator body, without incorrect or refused actions.

6. Electrical signal and feedback testing

Inspection content: Conduct separate inspections for ordinary and intelligent actuators. For ordinary actuators, inspect remote on/off and stop control functions as well as switch feedback signals. For intelligent actuators, inspect 4-20mA analog valve position feedback, Modbus, Profibus, CAN, and other bus communication functions.

Judgment criteria: Sensitive response to local and remote control, accurate valve position feedback data, stable communication without disconnection or data errors, and synchronous and error-free signal transmission.

7. Random inspection of protection level (IP level)

Inspection content: For actuators with conventional IP65 and IP67 protection levels, inspect the sealing of the housing, the sealing of the wiring port, and the integrity of the sealing gasket, and simulate dustproof and water spray resistance tests.

Judgment criteria: The equipment should be free from dust and water ingress, with a sealed structure in good condition, meeting the corresponding IP protection level requirements, and suitable for outdoor and humid working conditions.

8. Temperature rise and no-load current detection

Test content: After the equipment has been operating stably under no-load conditions, measure the operating current of the motor and the temperature rise of the equipment casing.

Judgment criteria: The no-load current and temperature rise values are within the allowable range specified in the national standard, with no abnormal heating or overload hazards.

II. Load performance testing (spot check + special testing for key orders)

1. Rated torque/thrust test

Test content: Apply rated load to the actuator and repeatedly perform full-open and full-close cycling actions; additionally, conduct a short-term overload test at 1.1-1.2 times the rated load.

Judgment criteria: Stable operation under rated load, torque output meeting standards; no damage or malfunction under short-term overload, and normal triggering of torque protection function.

2. Life test

Test content: According to the JB/T 8862 standard, tens of thousands of cycles of opening and closing tests under light load and rated load conditions will be conducted to assess the mechanical wear of the equipment, the durability of the motor, and the reliability of the limit switch.

Judgment criteria: After cyclic operation, there should be no damage, jamming, or malfunction of parts, and all performance indicators should meet the factory standards.

3. Continuous operation test

Test content: Continuous monitoring of motor status, stability of electronic control components, and integrity of sealing structure during long-term intermittent operation of the equipment with power on.

Judgment criteria: No issues such as motor overheating, component aging, seal leakage, or malfunction.

4. High and low temperature environmental testing

Test content: After placing the equipment in a low temperature environment of -40℃ and a high temperature environment of +80℃ for standby, conduct a test on the opening and closing actions, suitable for outdoor and extreme working condition equipment testing.

Judgment criteria: Smooth operation and stable performance under extreme temperature conditions, with no malfunctions, no stalling, and no signal abnormalities.

III. Special testing for explosion-proof actuators (mandatory standard for high-risk areas)

Execution standard: GB 3836 Explosion-proof National Standard

Inspection items and standards: 1. Inspect the strength of the explosion-proof enclosure, the gap of the flameproof surface, and the roughness of the plane, ensuring no deformation, scratches, or collision defects; 2. Verify the tightness of the flameproof joint surface, and ensure that the torque of the fastening bolts meets the standard and the installation is standardized; 3. Inspect the explosion-proof sealing performance of the wiring cavity and cable entry device, eliminating the potential for infiltration of flammable and explosive gases; 4. Check the explosion-proof certificate, complete the explosion-proof re-inspection of the entire machine, and only products that meet all indicators can be shipped and used in explosion-proof areas. The BED-EX series explosion-proof actuators from Baird are equipped with Exd II BT4/CT4 explosion-proof qualifications and are produced and inspected in accordance with certificates and regulations.

IV. Additional special testing for intelligent actuators

Test items and standards: 1. Valve position accuracy and repeatable positioning accuracy test, with positioning errors meeting equipment technical standards; 2. Fault alarm function test, capable of accurately alarming and recording faults such as overload, phase failure, overheating, and signal loss; 3. Human-machine interface, parameter setting, and power-off memory function test, ensuring convenient operation and stable parameter retention; 4. EMC electromagnetic compatibility and anti-interference test, capable of resisting interference from on-site power grids, frequency conversion equipment, and instruments, ensuring stable operation.

V. On-site arrival inspection and testing

Inspection items and standards: 1. Visual inspection of documentation: Verify the certificate, test report, instruction manual, and nameplate parameters, ensuring that the equipment appearance is free from transportation damage; 2. Mechanical performance testing: Ensure smooth manual and electric switching, with no jamming or abnormal noise throughout the entire opening and closing process; 3. Electrical retesting: Conduct a simple on-site retest of insulation resistance, ensuring that the value meets the standard; 4. Signal joint debugging: Verify that the local and remote control signals, as well as the valve position feedback signals, are normal; 5. On-load joint testing: Cooperate with the valve to perform actual on-load opening and closing, ensuring no pressure buildup, leakage, jamming issues, and normal operation condition adaptation.

VI. Summary of Testing Items in Shorthand

1. Basic electrical inspection: insulation, voltage withstand, no-load current, temperature rise testing

2. Operational performance: travel limit, torque protection, opening and closing duration, manual and electric switching detection

3. Signal communication: valve position feedback, remote control, and bus communication function testing

4. Environmental protection: IP protection, high and low temperature adaptability, waterproof and dustproof testing

5. Special inspection: load life, explosion-proof performance, electromagnetic compatibility, on-site load acceptance