LFY-228C Chemical Resistance Liquid Pressure Penetration Testing Instrument

Invention Patent: ZL 2015 1 0405467.9 
Main purpose

This test is applicable to protective clothing materials and gloves, etc. It examines the ability of the materials to resist the penetration of chemical liquids under specific time and pressure conditions, and checks the penetration of liquids on the materials. 
Technical indicators

The instrument continuously applies pressure to the sample using an air pressure source, and is not restricted by the space of the testing site (the pressurizing medium used is compressed air). 
2. The instrument is equipped with a pressure gauge to display the pressurization pressure. The pressurization pressure can be adjusted, and the rate of pressure reduction should be less than 3.5 kPa/s. 
3. Special stainless steel test device and discharge valve are available, suitable for 40% sodium hydroxide at 20°C, 36% hydrochloric acid at 20°C, 37% sulfuric acid at 20°C, 50% toluene at 20°C, 50% isooctane at 20°C, or other chemical liquids. 
4. The instrument is equipped with a clamp that can generate a torque of 13.6 Nm. 
5. Pressure test points: 0 kPa, 6.9 kPa, 7 kPa, 13.8 kPa, 14 kPa, 21 kPa, 28 kPa, 35 kPa; 
6. The digital timer is adjustable and has an accuracy of ±0.01 seconds. 
7. Sample size: 75mm × 75mm. 
8. Test environment: Temperature 20 ± 2℃, Relative humidity 30% - 80%. 
9. Power Supply: AC 220V, 50Hz. 
Applicable Standards 
GB 24539-2025 Protective Clothing - Chemical Protective Clothing (Appendix F, Liquid Pressure Penetration Test) 
GB 24536-2025 Chemical Protective Clothing for Protective Clothing Selection, Use and Maintenance

XF 7-2004 Fire Gloves - Test Method for Anti-chemical Properties 
ASTM F1670-2008 Standard Test Method for Resistance of Protective Clothing Materials to Transference of Artificial Blood 
ASTM F903-2010 Standard Test Method for Tolerance of Liquid Penetration Protective Clothing Materials