1. Not suitable for halogenated hydrocarbons, aromatic hydrocarbons, or gasoline
2. Operating Temperature: ☆General Type: <50℃ (Pressure Difference: 0.3MPa)
High Temperature Type: <100℃ (Pressure Difference: 0.2MPa)
121℃ Steam Sterilization, 30 minutes per session, up to 7 additional times.
3. Withstanding high pressure difference (at 25°C): Forward: 0.42 Mpa
Reversed: 0.21 MPa
With increased operating temperature, the tolerance for pressure differential is relatively reduced.
4. pH Range: 1-14
5. Filter elements are consumables; however, during cleaning and disassembly, care should be taken to avoid scratching, bumping, dropping, and other phenomena to prevent accidental damage. It is strictly prohibited to apply force to the surface of the filter elements with tools.
6. When filtering, gradually increase the pressure to the required working pressure; strictly prohibit fully opening the valve to rapidly increase pressure instantly.
7. During backblowing and backwashing, filter elements are typically first backblown with pure gas, at a pressure 1.2-1.5 times the working pressure, for 3-5 seconds each time. Repeat this process 4-6 times, then perform backwashing with clean liquid for 3-5 minutes, repeating 2-3 times.
8. If the pressure drop remains significant after the filter element is online backblowing and backflushing, it should be promptly removed for cleaning.
Washing instructions
Filter elements can be regenerated and cleaned through physical and chemical methods based on the contamination level and the chemical properties of the pollutants, as well as the physical and chemical properties of the metal. Physical methods primarily include: clean liquid backflushing, clean gas backblowing, and ultrasonic cleaning. Chemical methods mainly involve the use of dilute acids, dilute alkalis, oxidizing agents, surfactants, enzymes, and other cleaning agents. These methods can also be alternated. According to several common application scenarios, the cleaning methods are as follows:
1. For decarburization filtration in the chemical industry, it's advisable to frequently use backblowing, backwashing methods, and combine them with ultrasonic cleaning for optimal results.
2. In the water treatment industry, since the filtration elements retain mostly non-soluble salts and oxides on their surface, they are typically soaked in 5% nitric acid, ultrasonic cleaning is not required to achieve the cleaning effect.
3. Filtration of the raw liquid requires combining with the chemical properties of contaminants and using the following methods for cleaning:
(1) Alkaline washing: Immerse in a 3-5% sodium hydroxide analytical purity solution for 30-60 minutes at approximately 40 degrees Celsius, with ultrasonic cleaning machines being ideal. After soaking, rinse both inside and outside with filtered deionized water or注射用水 to neutralize. Measure conductivity. Dry with pure air at a pressure of ≥ 0.4 MPa.
(2) Pickling: Soak in a 5% nitric acid solution for over 8 hours at a temperature of around 40 degrees. Optimal in an ultrasonic cleaner. After soaking, rinse internally and externally with filtered deionized water or injection-grade water until neutral and side conductivity. Dry with pure air at a pressure of ≥0.4 MPa.
(3) Organic contamination can be addressed with surfactant cleaning, while a combination with enzymatic cleaning is more ideal for cell debris contamination (high-concentration citric acid cleaning can be used for food and beverage).
(4) These methods can be used individually or in combination. If possible, using an ultrasonic cleaner in conjunction with these methods yields the best results.
Note: Regular online backflushing (using pure compressed air or filtered stock solution or clean water to rinse) can reduce the frequency of cleaning with the aforementioned methods.