Is it Viton ? Simple Ways To Test for its Quality
There Are Many thing That needs to be checked while we have a Sample of Viton Product. As We Know that Viton Products are Expensive and often used in industries where there are extreme working environment with harsh chemicals and hot fluids. Definitely we cannot Compromise With its Quality.
Different Ways to check for its Purity.
Check For its Specific Gravity.
Tensile testing
Hardness and indentation
Statistical control methods
How to Check For its Specific Gravity.
The Above Video Perfectly Describe How Can We Check For The Given Specimen of Viton Rubber For its Specific Gravity using water dip test Utilizing Archimedes principle . Download the derivation
As We Know that the Specific Gravity of Viton Rubber is the most in all Rubber polymer thus any adulteration in Viton will reduce its specific gravity Quite Significantly . The Specific Gravity of Viton Product Should Lie between 1.8-2.1 thus this is the most reliable way to check for its quality via water dip test.
Tensile testing
Prepare specimens according to ASTM D412 or ISO 37, ensuring a dumbbell shape and ~2 mm thickness. Condition samples at 23°C ± 2°C and 50% ± 5% humidity for 16-24 hours. Use a calibrated UTM with suitable grips and set a gauge length (e.g., 25 mm). Apply a crosshead speed of 500 mm/min, recording force and elongation until break. Calculate tensile strength (max force/initial cross-section), elongation at break (length change %), and modulus (initial slope). Follow safety protocols and inspect fracture surfaces post-test for irregularities.
Hardness and Indentation Testing of Viton
To measure hardness, use a durometer following ASTM D2240 for Shore A or D scales, depending on the hardness range of the Viton. Place the specimen on a flat, stable surface and press the durometer perpendicularly until full contact is made. Record the hardness value once stabilized.
Indentation Testing involves applying a known force to an indenter (e.g., spherical or flat) to create an impression on the material. Measure the depth or diameter of the indentation and correlate it with hardness. For more precision, instrumented indentation tests may be performed, recording the force-depth profile to assess material properties like elastic modulus.
Temperature test of Viton
Viton is a type of fluoroelastomer that’s well-known for its excellent resistance to high temperatures, chemicals, and oil. If you need to conduct a temperature test on Viton to evaluate its performance under heat, here’s a general overview of the process:
1. Preparation
- Select a Viton sample: Choose a sample that is representative of the type of Viton material you plan to test (e.g., Viton A, Viton B, Viton F).
- Equipment needed: A laboratory-grade oven or temperature chamber capable of maintaining precise high temperatures and measuring instruments like a thermometer or thermal sensors.
2. Set Temperature Parameters
- Operating Temperature Range: Viton can typically withstand temperatures from about -20°C to 204°C (-4°F to 400°F). High-performance grades can go up to 250°C (482°F) for short periods.
- Set testing temperatures: Decide on test points, e.g., 150°C, 200°C, and 250°C, based on your specific application.
3. Conduct the Test
- Heat the chamber/oven: Preheat the equipment to the desired temperature.
- Place the sample in the chamber: Position the Viton sample in the controlled environment.
- Monitor the sample: Observe changes over set durations, such as 1 hour, 24 hours, and 72 hours, to identify any signs of degradation or hardening.
4. Post-Test Analysis
- Check physical changes: Inspect for hardening, cracking, or loss of elasticity.
- Perform a durometer test: Measure the hardness of the sample before and after exposure to check for changes.
- Document results: Record observations on flexibility, color change, and any visible damage.