How to understand the life of the filter through leak detection

How to know the service life of the filter through leak detection? How to know the service life of the filter through leak detection? *, the service life of the filter 1 According to the monitoring procedures formulated by the company, regularly monitor the air cleanliness of the clean workshop In case of any abnormal condition, if the filter is considered as a problem, it shall be replaced, such as the air supply volume drops to 70%, leakage, etc.; 2 Conduct regular verification according to the verification requirements of the air conditioning purification system, and replace as required in case of any abnormal condition 3 When abnormal conditions are found in the normal production process, such as unqualified pressure difference and air supply volume can not be felt, the filter shall be replaced after analyzing the causes; 4 The replacement cycle specified in the company's documents: * generally, the production volume, dust production and other factors shall be considered, which shall not be blindly specified or followed by others 2 The dust particle counter method is used for the test of filter leakage: generally, a small sampling instrument such as 2.83l/min is used, and the limit specified by the dust particle count method is taken as the judgment standard, or obvious particle number change is found Operation method: the sampling port is 2-3cm away from the filter, and the moving speed is 5-20mm / s DOP or Pao method using instruments: smoke generator, leak detector Methods: the distance between the sampling head of the receiver and the filter was about 2cm, and the inspection speed was within 2 ~ 3cm / s Standard: the leakage rate shall be less than 99.99% Filter leakage detection 1 Purpose: to detect the leakage of the filter, find out the defects of the filter and its installation, so as to take remedial measures in time 2 Scope: applicable to filter leakage detection in clean area 3 Responsible person: quality department, production department 4 Procedure: 4-1 test method: dust particle count scanning inspection method 4-2 Test range: filter material of filter, sealing of filter frame and connection between filter group support frame, connection between support frame and fixed wall 4-3 test instrument: dust particle counter 4-4 Detection principle: according to the principle of light flux that the floating particle scatters in the light of constant intensity and is proportional to its particle size, the scattered light of the particle changes into an electrical signal through photoelectric conversion, and after amplification and computer processing, the equivalent diameter of the particle and the number of corresponding particles are displayed 4-5 detection procedure: 4-5-l scanning filter with the sampling head of the dust particle counter At the outlet side of the filter, the sampling head is about 2cm away from the filter The scanning speed is less than 5cm / s 4-5-2 when the detection period is 10min, the particle number of 0.5um is more than 20, indicating that the leakage is over standard and needs to be repaired or replaced 4-5-3 use epoxy resin glue to block leakage or fasten bolts, and then carry out scanning inspection 4-6 inspection cycle: during normal use, at least * times a year, the newly installed filter shall be inspected Check * times a year, the pressure difference at the two ends of the filter, when the pressure difference reaches three times of the initial resistance value, it shall be replaced; the air flow speed shall be reduced to a low limit, even if the secondary efficiency filter is replaced If the air volume of the air filter is 70% of the original air volume, it shall be replaced; if the air filter has leakage that cannot be repaired, it shall be replaced Zhejiang Fuxia Medical Technology Co., Ltd., located in Daoxu Town, Shangyu District, Shaoxing City, Zhejiang Province, is a manufacturer in the purification equipment industry in East China According to iso14644-1 standard, GB50073-2001 national standard and GMP standard, we can provide professional air purification system engineering design, construction, testing and technical services for microelectronics, biomedicine, hospital operating room, optical fiber cable, food and beverage, precision instrument, semiconductor and new material application industries The company's main products are purification bench series, wind shower series, ventilation cabinet series, biosafety cabinet series, dust particle counter, planktonic bacteria sampler, which are widely used in medical and health, electronics, pharmacy, biology, food, agriculture and forestry, animal husbandry and veterinary, inspection and quarantine, aerospace, automobile manufacturing, precision instruments, universities and scientific research institutions Zhejiang Fuxia Medical Technology Co., Ltd is dedicated to serving the global consumers and distributors with our products, humanized services, low prices, and warmly welcome you to join us!