Hand Jack vs. Automated Testing: Why Smooth Force Application Matters for Safety Valve Testing
When it comes to safety valve testing, accuracy and repeatability are critical. Variations in lifting force application can lead to inconsistent test results, potential valve failures, and costly downtime.
Many test systems rely on a hand jack for force control, but this method introduces challenges that can compromise accuracy.
In contrast, an automated approach that uses a computer-controlled electric motor to apply the lifting force smoothly can eliminate these inconsistencies and deliver more reliable test results.
Let’s explore why the pressure application method matters and how automation improves the testing process.
The Challenges of Hand Jack Lift Force Application
Many conventional safety valve test systems require an operator to manually pump a hand jack to apply the lifting force. This approach presents several issues:
- Inconsistent Lift Force Application – The force applied by a hand jack varies depending on the operator, making it difficult to achieve truly repeatable results
- Sudden Pressure Spikes – Manual operation often leads to abrupt pressure jumps, which can distort setpoint readings or even damage sensitive valves.
- Operator Fatigue – Carrying heavy hydraulic equipment and physically pumping a hand jack over multiple tests increases the risk of error and slows down the process.
- Longer Testing Time – Errors during as-found tests can expand the scope of testing requirements, increasing the time required to complete the process.
Why Smooth, Controlled Pressure Application Improves Accuracy
Using an electric motor for the application of a lifting force control offers key advantages over manual methods:
- Consistent, Repeatable Testing – An automated system ensures a steady, controlled increase in lifting force, eliminating human variability.
- Increased Efficiency – Automation speeds up the testing process, reducing downtime and improving productivity.
- Prevents Overloading – The system automatically controls the lifting force throughout the test, preventing excessive force from damaging the valve.
- No Pressure Spikes – Fine-tuned lifting force control provides more accurate test results and prevents potential valve damage.
- Single User Operation – The lightweight system can be carried and set up by a single user, allowing operators to focus on data collection and analysis rather than physical effort.
Upgrade to Precision and Efficiency with Automated Safety Valve Testing
When it comes to safety valve testing, precision isn’t just a preference—it’s a necessity. Inconsistent lift force from hand jacks can lead to skewed results, damaged valves, and wasted time.
That’s why both the AccuTEST-SL and AccuTEST-TT models use a computer-controlled electric motor to deliver smooth, consistent lifting force—eliminating pressure spikes and human variability from the testing process. The result? More accurate, repeatable results—every time.
Whether you need a shop-ready solution or advanced features for field testing, AccuTEST has an automated system that will fit your needs and simplify your technicians’ work.
Ready to take the guesswork out of valve testing? Contact AccuTEST today to see how automation can elevate your accuracy and reliability—test after test.
