SH/T 0210-1992 Hydraulic fluid filterability test method

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / replacement relationship

• Standard number: SH/T 0210-92
• Full name: Hydraulic fluid filterability test method
• English name: not provided in the available source
• Replacement relationship: replaces ZQ E39 008-89
• Other: confirmed in 2004; approved by China Petrochemical Corporation 1992-05-20, implemented on 1992-05-20

2. Scope of application and non-applicability

• Scope of application: applicable to various petroleum-based and synthetic hydraulic fluids.
• Not applicable: not provided in the available source.

3. Method principle

200 mL The sample is tested in the specified filtration apparatus at 18～24 ℃, 86658 Pa (650 mmHg) vacuum; the time required to filter 75 mL of sample (s) is the filterability of the water-free sample. Separately, 200 mL of sample containing 2% water is tested under the same conditions, and the test result is the filterability of the water-containing sample.

4. Reagents and materials (purity / preparation)

• Petroleum ether: 30～60 ℃, analytical reagent.
• Vacuum rubber tubing.
• Filter membrane: diameter 50 mm, pore size 1.2 μm mixed cellulose ester.
• Distilled water (used to prepare the water-containing sample, see 7.5).

5. Apparatus and equipment

• Filtration device: see Figure 1 and Figure 2a
  • a. Funnel: 300 mL, cylindrical, scale from 100～250 mL, graduation 25 mL.
  • b. Metal spring clamp: tool for clamping the funnel and funnel base.
  • c. Suction flask: 1000 mL.
  • d. Rubber stopper funnel base: made of polychloroprene rubber.
  • e. Rubber sealing gasket.
  • f. Screen plate.
• Graduated cylinder: 250 mL.
• Syringe: 2 mL.
• Ground-glass-stoppered Erlenmeyer flask: 500 mL.
• Culture dish: 110 mm.
• Stopwatch.
• Hair dryer.
• Tweezers: smooth tips without serrations.
• Mercury differential manometer.
• Vacuum pump: 2XZ-0.5 rotary vane pump.

6. Recommended operating conditions

• Test temperature: 18～24 ℃.
• Vacuum: 86658 Pa (650 mmHg).
• Timing start point: timing starts when the liquid level of the sample in the funnel reaches the 175 mL mark.
• Timing end point: the time required to filter 75 mL of sample (s).
• Water content of water-containing sample: 2% distilled water.
• Shaking of water-containing sample: shake vigorously for 5 min±0.5 min.
• Degassing conditions: degas at 18～24 ℃, 86658 Pa (650 mmHg) vacuum until bubbles are eliminated.

7. Sampling and sample preparation

• Water-free sample: take 200 mL of sample after constant temperature at 18～24 ℃.
• Water-containing sample: separately take 300 mL of sample and inject into a 500 mL ground-glass-stoppered Erlenmeyer flask, add 2% distilled water with a syringe, stopper the flask, hold it horizontally with both hands and shake vigorously for 5 min±0.5 min, then pour into a clean suction flask, and degas at 18～24 ℃, 86658 Pa (650 mmHg) vacuum until bubbles are eliminated.
• Note: the original text 7.5 writes “separately take 300 mL of sample”, while the method summary and 7.4 are 200 mL; this point is doubtful and requires confirmation against the source standard (source-text extraction).

8. Analytical procedure

• 6.1 Wash the test funnel, funnel base and suction flask with soapy water. Rinse thoroughly with tap water, then rinse with distilled water and dry. Note: the rubber stopper on the funnel base must not be baked.
• 6.2 Place the screen plate in a culture dish, soak with petroleum ether, and shake gently to thoroughly clean contaminants. After removal, rinse a second time with petroleum ether, then blow dry with cold air, and place in another clean culture dish.
• 6.3 Wash the rubber gasket with petroleum ether, then blow dry with cold air and place in a culture dish for later use.
• 7.1 Assemble the apparatus according to Figure 1 and Figure 2, and connect the mercury differential manometer and vacuum pump.
• 7.2 Using tweezers, carefully place the rubber gasket onto the funnel base first, then place the screen plate, making it flat and level to ensure the sealing performance of the apparatus.
• 7.3 Using tweezers, carefully place the circular water-free filter membrane on the filter membrane screen plate; the actual filtration area of the installed filter membrane screen plate is 9.6 m² (original text as such, suspected to be cm², requires confirmation against the source standard (source-text extraction)). Note to align the center, do not puncture the filter membrane, then place the funnel on the funnel base and clamp tightly with the metal spring clamp.
• 7.4 Take 200 mL of sample after constant temperature at 18～24 ℃ and inject into the funnel, simultaneously start the vacuum pump, adjust and maintain the vacuum at 86658 Pa (650 mmHg); timing starts when the liquid level of the sample in the funnel reaches the 175 mL mark, and record the time required to filter 75 mL of sample (s).
• 7.5 Separately take 300 mL of sample and inject into a 500 mL ground-glass-stoppered Erlenmeyer flask, add 2% distilled water with a syringe, stopper the flask, hold it horizontally with both hands and shake vigorously for 5 min±0.5 min, then pour into a clean suction flask, and degas at 18～24 ℃, 86658 Pa (650 mmHg) vacuum until bubbles are eliminated.
• 7.6 Test the degassed sample according to clauses 7.1～7.4, and record the time required to filter 75 mL (s).
• 7.7 After the test, clean the apparatus according to Chapter 6.

9. Qualitative and quantitative determination and calculation formula

• The test results are reported as the time (s) required to filter 75 mL of the water-free sample and the water-containing 2% sample.
• Calculation formula: not provided in the available source.
• Judgment (Chapter 8):
  • 8.1 The water-free sample is qualified if the time to filter 75 mL is not greater than 600 s; the water-containing sample is qualified if the time to filter 75 mL is not greater than 1200 s.
  • 8.2 Observe and record any residue on the circular filter membrane other than normal contaminant particles.

10. Precision

not provided in the available source.

11. Report

The test results are reported as the time (s) required to filter 75 mL of the water-free sample and the water-containing 2% sample, and indicate “qualified” or “unqualified”.

12. Referenced documents

not provided in the available source.

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick reference Q&A