Static acid pressure performance tester operating procedures
Article from Qingdao Zhongbang Instrument Co., Ltd. Technology Department
First, the main purpose
ZF-631 liquid static pressure testing device is developed according to Zui new national standard GB 24540-2009 "protective clothing acid and alkali chemical protective clothing" Appendix E, dedicated to testing fabric acid and alkali chemical protective clothing resistance to hydrostatic pressure, The resistance of the agent to the fabric is indicated by the hydrostatic value of the fabric.
Second, the instrument structure
The instrument structure mainly includes the following parts:
1. Sample holder 2. Waste liquid recovery beaker 3. Adding funnel 4. Exhaust gas emission fan
5, test box 6, transmission part
Third, the instrument meets the standard
"GB 24540-2009 protective clothing acid and alkali chemical protective clothing" Appendix E
Fourth, the main technical indicators
1. The rising rate of the test liquid surface: 610±10mm/min
2, sample specifications: φ32mm
3. Power supply: AC220V 50Hz 100W
Five, operating instructions
1 , sampling
Take 3 samples from the finished protective clothing, the sample size is φ32mm
2 , test steps
(1) First turn on the "power switch" on the front panel of the test box.
(2) Press the “Reset†button to reset the test column.
(3) A reagent (80% sulfuric acid or 30% 30 sodium hydroxide) prepared in advance was injected into the addition funnel using a flow guide bar.
Press “Pressure†and carefully observe the sample holder. When the liquid level is flush with the top surface of the sample holder, press “Stop†quickly.
The prepared sample is clamped on the fixture, taking care to ensure that the surface of the sample is in contact with the acid. When clamping, ensure that the acid does not pass through the sample due to pressure before the test begins.
(4) Press the “Clear†button to clear the initial reading of the meter. Press the “Pressure†button and the test column will rise at a rate of 610 ± 10 mm/min. Record the penetration time t.
(5) The sample is subjected to increasing acid pressure. At this time, the acid leakage should be constantly observed. When the third liquid bead appears on the sample, press “stop†to pressurize and record the static pressure value at this time— Liquid column height in mm.
Calculate the hydrostatic pressure resistance of the sample by the formula P=Ïgh
Where Ï is the density of the reagent
G——gravity acceleration
H——liquid column height
(6) Keep pressing the “empty†button until the test solution in the pipeline is completely drained, and then press the “Reset†button to lower the test column lifting device to the low position, and one test is completed. Press the “Clear†button to clear the static pressure value recorded by the meter.
(7) Repeat the above steps for the next test.
Six, matters needing attention
1. Acid and alkali have certain corrosiveness. Testers should wear acid/alkali gloves to avoid personal injury.
2. When the reagent is added, the diversion tube should be slowly introduced, and it is forbidden to pour directly.
3. When testing, the glass door at the sample position must be closed.
4. If an unexpected situation occurs during the test, please turn off the power of the instrument in time, and then clear the fault before turning it on again.
5. When the instrument is not used for a long time or when the reagent type is changed, the residual solution emptying operation must be performed! After completing this step, Zui uses the cleaning agent to repeat the test and emptying steps to thoroughly clean the pipeline.
6, the instrument power supply should have a reliable grounding!
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