When someone has sealing issues, we’re glad to answer their calls for help. Take this story, for example.
A company was experiencing some unwanted stress with leaky check valves on their process piping. Because the pipes were carrying 95% ethanol, this problem had the potential to be extremely costly.
To make matters worse, the company was asked to supply more of these valves for a new phase of their customer’s project, as well as for a new line of products. With only two weeks to find a solution for the leaks, they turned to Apple Rubber.
Before we could start working on a solution, our experts had a few questions to answer:
1. What type of material are the O-rings made of?
2. What is the compression set?
3. What is the fluid resistance?
They headed to the Apple Lab for some testing:
• FTIR (Fourier Transform Infrared Spectrophotometer): this test helps determine the chemical make-up of rubber compounds both before and after molding. This ensures the consistency of rubber compounds and seals batch to batch, shipment to shipment.
• ASTM D395: This test is used to determine the compression set of rubber products.
• ASTM D471: This test determines how chemicals affect an elastomer (fluid resistance).
After these tests were performed, our experts discovered that there were three different o-ring materials being used in the faulty check valves even though the customer believed they were only getting one.