Pulsating Vacuum Pressure Steam Sterilizer B-D Test

BD test is used to detect pre-vacuum pressure steam sterilizer cold air discharge test, the test is based on the indicator color change is uniform to determine whether the pulse vacuum sterilizer in the sterilization process has a cold air mass Residual.

1 materials and methods

1.1 Materials: 3M company's B-D test paper, made of pure cotton standard package.
1.2 Methods B-D test kit consists of 50 cm × 90 cm cotton cloth towel size of 50, first horizontal towel cloth to 3 layers, and then folded to form a 6 layer. Cloth folded cloth a pile to a height of 25 cm, when stacked, the layers of cloth towels alternately folded around the side so that both sides of the same thickness. Cloth placed, the chemical indicators of the level of folder placed between the central cloth towel, and then cloth all cloth towels into a test bag, the outside with 3M chemical indicator tape fixed, the size of the entire cloth towel bag, about 25 cm high, wide 23 cm, length 27 cm, weight 4 kg.
Place the test pack horizontally in the empty pot and close to the cabinet door and exhaust port. Under the condition of the steam source pressure of 0.30-0.50 MPa and the water source pressure of 0.15-0.30 MPa, the vacuum is evacuated for 3 times with a vacuum of 0.086 MPa Working pressure 0.21 MPa, temperature 134 ℃, sterilization 3.5 ~ 4 min, after removing the judge to determine the results.

2 criteria

B-D test paper shows black and white lines clear, uniform color, clear, rapid steam penetration, cold air excluded, no significant air leaks, no cold air mass exists, said the test pass. B-D test paper discoloration uneven color or the middle of the test paper than the external color light, indicating that monitoring failed.

More info, please visit: www.sadalimited.com