Product Description:

DOP high-efficiency filter, DOP liquid tank high-efficiency filter, DOP liquid tank high-efficiency air filter:
The performance and installation of DOP high-efficiency filters and DOP liquid tank high-efficiency filters are to some extent related to whether the cleanroom can achieve and maintain the designed cleanliness level. Therefore, conducting leak testing on high-efficiency filters in clean workshops to ensure their compliance with requirements is one of the important means to ensure a clean environment in the workshop.

1、 'Zijing' brand DOP high-efficiency filter, also known as liquid tank high-efficiency air filter and high-efficiency filterIts unique liquid tank structure design has better sealing performance than traditional sealing structures, and has passed effective leak detection and scanning tests before leaving the factory
Due to its good sealing performance, easy installation, high efficiency, low resistance, and low operating costs, it can effectively reduce the operating costs of clean rooms while meeting higher requirements for sealing.

DOP high-efficiency filter is a method of sealing that is superior to commonly used mechanical compression devices in China. The liquid tank sealed DOP high-efficiency filter is easy to install and has a very reliable seal, making it a widely used sealing method for high-efficiency filters internationally.

High sealing performance and good leak filling ability. Widely used in cleanrooms with high requirements, large-scale vertical laminar flow, hundred level laminar flow hoods, and installation of HEPA high-efficiency filters.

2、 Structure of 'Zijing' brand DOP high-efficiency filter/liquid tank high-efficiency air filter:
The DOP liquid tank type high-efficiency air filter sealing installation system includes a liquid tank filled with sealing liquid and a suspended ceiling installation frame. Its characteristic is that the liquid tank is a U-shaped cross-section liquid tank formed by bending the surrounding frame of the high-efficiency air filter upwards;

The suspended ceiling installation frame is composed of suspension rods, a grid shaped installation frame body composed of inverted U-shaped cross-sectional grooves, positioning support plates, and bolts; The installation frame body has several grids surrounded by one side of an inverted U-shaped groove. The installation frame body is connected to the suspension rod, and a vertical threaded sleeve is set on the inner side. Each grid is inserted into the liquid groove around each high-efficiency air filter ring;

The positioning support plate is located at the bottom of two adjacent liquid tanks, and is connected to the installation frame by tightening bolts into vertical threaded sleeves to support the high-efficiency air filter. The advantages of the new model are: reliable and fast sealing installation of large-area and large-scale high-efficiency air filters, enhanced strength of the high-efficiency air filter frame, and expanded application range.

3、 Introduction to 'Zijing' brand DOP high-efficiency filter/liquid tank high-efficiency air filter sealant：
The liquid tank sealant is blue in color and resembles jelly, hence it is also known as jelly glue. Liquid tank sealant is a non Newtonian liquid, which has the characteristics of non-volatile, non oil climbing, non-toxic and odorless. It has good stability at room temperature.

4、 Materials and operating conditions of the 'Zijing' brand DOP high-efficiency filter:
Frame material: aluminum profile;

Sealing glue: polyurethane adhesive;

Partition: heat capacity adhesive/paper partition/aluminum partition;

Filter material: glass fiber;

Maximum operating temperature: 70. C；
Maximum humidity usage: 100%;

Sealing medium inside the groove: blue jelly glue;

5、 Characteristics of 'Zijing' brand DOP high-efficiency filter and liquid tank high-efficiency air filter products:
1. No partition design, high-quality fiberglass filter paper to reduce operating costs.

2. Compact structure, fully utilizing the interlayer space.

3. High dust holding capacity and long service life
4. Liquid tank design for better sealing performance

5. Efficiency: 99.7% @ 0.3um (H13), 99.99% @ 0.3um (H14) 99.999% @ 0.3um (U15) (EN1822)

6. The thicknesses are 66mm, 80mm, 90mm, 93mm, 150mm, and 220mm

6、 Material and usage conditions of 'Zijing' brand DOP high-efficiency filter/liquid tank high-efficiency air filter:
Outer frame: anti-corrosion treatment of aluminum alloy;

Segmentation: Hot melt adhesive;
Filter material: ultra-fine glass fiber;

Sealing strip: flame retardant material;

Maximum operating temperature: 80 ℃;

Maximum humidity used: 100% RH;

7、 The purpose of leak detection for the 'Zijing' brand DOP high-efficiency filter is:
The filtration efficiency of the high-efficiency filter itself is generally tested by the manufacturer, and a filter filtration efficiency report and a certificate of qualification are attached at the factory. For pharmaceutical companies, high-efficiency filter leak detection refers to on-site leak detection of high-efficiency filters and their systems after installation, mainly checking for small pinholes and other damages in the filter material. The purpose of leak detection is to check the sealing of the high-efficiency filter and its connection with the installation frame, timely discover any deficiencies in the high-efficiency filter itself and during installation, take corresponding remedial measures, and ensure the cleanliness of the area.

8、 The principle of leak detection method for 'Zijing' brand DOP high-efficiency filter:
The leak detection of high-efficiency filters usually uses a PAO generator to generate dust upstream of the filter, and a photometer to detect the aerosol concentration in the upstream and downstream of the filter to determine whether there is a leak in the filter. When the airflow is pumped into the light scattering chamber by a vacuum pump, the particulate matter in it scatters light to the photomultiplier tube. In a photomultiplier tube, light is converted into an electrical signal, which is amplified and digitized before being analyzed by a microprocessor to determine the intensity of scattered light. By comparing the signal generated with the reference substance, the mass concentration of particulate matter in the gas can be directly measured.

9、 Detection method for 'Zijing' brand DOP high-efficiency filter:
To determine whether there is obvious leakage in the high-efficiency filter itself and its installation, the following areas must be tested on site: the filter material of the filter; The connection between the filter material of the filter and the interior of its frame; Between the sealing gasket of the filter frame and the support frame of the filter group; Between the support frame and the wall or ceiling. The materials and instruments for DOP leak detection include: dust source (PAO solvent), aerosol generator, and aerosol photometer. Checking a filter takes about 5 minutes. During the testing process, the concentration of upstream aerosols should be regularly confirmed. It is important to wear a protective face mask and goggles during the testing process.

10、 Judgment and processing method for the results of the 'Zijing' brand DOP high-efficiency filter:
The leakage rate of the high-efficiency filter should be less than or equal to 0.01%. If the% LEAKAGE (leakage rate%) of all HEPA points during the testing process does not exceed 0.01%, the HEPA is considered qualified. If there is a point with a% exceeding 0.01%, it is considered unqualified and the point is marked for repair or replacement.

11、 Leak detection cycle of 'Zijing' brand DOP high-efficiency filter:
The recommended long interval for leak detection of HEPA installed is 24 months. DOP leak detection should be performed after HEPA installation or replacement. When environmental monitoring shows a deterioration in air quality, or when product sterility testing fails, or when the simulated filling test of the culture medium fails, it can be used as part of the deviation investigation for leak detection. The filter that needs to undergo leak detection testing should also be included.

Original product source: Primary filter http://www.chuxiaofilter.com/