Disposable three-way valve torque testerIt is a key equipment to ensure the safety of medical infusion and transfusion equipment. Its inspection items revolve around the core performance of three-way valves, covering three dimensions: opening, closing, and long-term stability. The specific inspection items are as follows:

1、 Activate torque test: Ensure ease of operation

When opening a three-way valve, if the required torque is too large, it may cause difficulties for medical personnel to operate, and may even damage the valve or cause medical accidents due to excessive force. The tester accurately measures the maximum torque required for opening by simulating the opening scenario. For example, the torque range of a certain model of tester is 0.01N · m to 1N · m, with an error of ≤± 0.5%, which can accurately capture small torque differences. If the test results exceed the preset range (such as a standard that stipulates that the opening torque should not exceed 0.4N · m), the product is judged to be unqualified and the production process or materials need to be adjusted to ensure smooth valve opening.

2、 Turn off torque test: verify sealing reliability

When closing the three-way valve, insufficient torque may result in poor sealing and cause liquid leakage; If the torque is too high, it may damage the valve structure. The tester simulates the closing operation, measures the required torque value for closing, and evaluates whether it is within the safe range. For example, a certain testing instrument uses high-precision mechanical sensors that can record the torque changes during the closing process in real time and generate a curve graph to visually display the sealing performance. If the closing torque is lower than the standard value (such as a standard requiring a closing torque of ≥ 0.2N · m), it indicates that the valve's sealing performance is insufficient, and the sealing structure needs to be redesigned or the sealing material needs to be replaced.

3、 Repeated switch torque test: evaluating lifespan and stability

Three way valves require frequent opening and closing in medical settings, and their torque performance may change due to wear or material fatigue after long-term use. The tester simulates long-term usage scenarios and conducts multiple consecutive (e.g. 1000 times) on-off tests on the three-way valve, recording the torque value of each switch and analyzing its changing trend. For example, the testing speed of a certain tester can reach 360 degrees per minute, with an error of ≤± 1 degree, and can efficiently complete repeated tests. If the test results show a significant decrease in torque value with increasing switching times (such as a decrease of more than 20%), it indicates that the product has insufficient lifespan or unstable performance, and material optimization or structural design improvement is needed.

4、 Data recording and analysis: supporting quality decision-making

The tester is equipped with a data processing system that can record real-time torque data (such as maximum value, average value, deviation value) for each test and generate detailed reports. For example, a certain model of tester supports real-time printing of 10 test data, and can output test reports containing key data through an embedded micro printer. These data not only provide a basis for product qualification judgment, but also help enterprises analyze potential problems in the production process (such as large torque deviation of a batch of products, which may be caused by mold wear or material batch differences), thereby optimizing production processes and improving product quality consistency.