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What is the quality of HEPA filter related to?

2023-01-07 Page view : 60 views

High efficiency filter price with the production process and quality inspection standard is not standard, high efficiency air filter because of the price, we gave up a lot of customers, but because of the quality, we increased more customers, so we still adhere to their own principles, cheap high efficiency filter is nothing more than to reduce costs, reduce service, for high efficiency filter seems similar, in fact, very far!

There are many different prices for high efficiency filters, high efficiency filters are partition high efficiency filter, no partition high efficiency filter, combined high efficiency filter, liquid trough type high efficiency filter, disposable integrated/replaceable integrated high efficiency filter, high humidity resistant high efficiency filter, high temperature resistant high efficiency filter. They all have different prices, specifications, sizes and prices.

Why the price of high efficiency filter and filter material and the outer frame have a lot of relationship?

At present, the filter material of high efficiency filter(Manufacturer of high efficiency air filters) in the domestic market is mostly H13 glass fiber filter paper or H14 glass fiber filter paper; Commonly used outer frame materials are galvanized steel plate, medium density board, kyauk plywood board, aluminum frame or stainless steel frame.

The outer frame of the high efficiency filter without partition is usually more aluminum frame, and the outer frame of the high efficiency filter with partition is galvanized steel plate, medium density board, aukyph board, aluminum frame or stainless steel frame, etc., the choice of the outer frame also determines the rise or decline of the cost, thus determining the price of the high efficiency filter.

The common partitions of high efficiency filters with partitions are aluminum foil and white cardboard. The price of aluminum partition high efficiency filters with the same specifications and models is different from that of paper partition high efficiency filters. In general, paper partition filters can be used in situations where the environment is not high, and conversely, aluminum partition high efficiency filters are selected.

The price of high efficiency filter is related to the production process and the quality inspection standard:

High efficiency filter in the production process and should pay attention to the key matters, to ensure that the production of high efficiency filter qualified rate of more than 99% of our standards, and through a series of corresponding inspection standards to ensure that catalpa clean factory high efficiency filter qualified rate of 100%. High efficiency filter production precautions and quality inspection standards

Key notes: the operator should make the first confirmation in the mass production of each process above, and then produce after the product inspection is confirmed. In the mass production, the operator must self-check the production of 1-3 pieces of the product in each process once to avoid the mass rework and scrap caused by other factors in the production; Quality inspection shall be conducted on each of the following processes by time sharing and subsection. If any problem is found, production shall be stopped in time. After passing the inspection, production shall be restarted.

Quality inspection shall label qualified semi-finished products, unqualified semi-finished products and qualified finished products in each process, so as to facilitate effective differentiation; The inspector randomly selects samples in the workshop and inspects them according to relevant standards of this product.

Make original records and issue inspection report.

1. The hardware department should pay attention to the thickness of the material and the tolerance size of the material should only be negative.

Detection tool: tape caliper

2. Pay attention to the temperature of hot melt adhesive and the amount of glue when folding and forming by automatic folding machine in efficient workshop, and control the folding distance of filter media.

Eye thermometer and glue line assembly pay attention to the filter material air inlet and outlet surface, and the outer frame can not be parallelogram, diagonal to be equal. Inlet face view of filter element; Feel diagonal; Detection tools: tape caliper;

4. When mixing glue, we must pay attention to the proportion and dosage. When adding catalyst, we should pay attention to the weather temperature at the ratio of 1:1000. The mixing ratio is A:B=1:2.5. The glue is mixed evenly, and the mixing time is not less than 1 minute. Dispensing tools: scale, dispensing machine, auxiliary tools: stopwatch.

5. Handle with care when cleaning the packaging. Clean the glue stains when the action is light, do not scratch the outer frame;

Look and see

6, one by one leakage detection, according to the proportion of 10:1 sampling efficiency. Detection table handheld detector.

7. Proofread the production order and check the quantity of products, and issue two copies of the warehousing order.

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Standard for inspection of finished filters

End face: height 123+0-2* Width 151+0-2 mm. Depth: The deviation of depth dimension is -0.2/-1.2mm. Diagonal: The diagonal of each end face of the air filter is equal.

Verticality: the end face of the frame should be perpendicular to the side, and the deviation should not be greater than 3°.


(1) no deformation, no oil stains, no scratches on the outer frame;

(2) There is no gap at the four corners splicing, and the four corners should be polished without burr;

(3) the color of the screen has no deviation, no rust, and the screen must be close to the air inlet surface;

(4) filter material without damage, no fuzz, fold number 35-37 fold;

(5) The surface of the glue is smooth, no sag and stacking phenomenon;

(6) The sealing rubber strip is firmly pasted, neatly and without skew.

The outgoing inspector samples the products to be shipped that day. Make and record visual appearance, measurement and inspection records.


The selection of raw materials and process requirements refer to the high efficiency filter process standard reference table.

Filter production refer to high efficiency air filter (standard GB13554-92).

When the process or material needs to be modified due to the production process, the Internal Contact Form should be filled in, and the modification can only be implemented after the review and approval of the design department and the supervisor. The Design Department will follow up the whole process.

Identification use list, item identification name, identification style, identification status;

1, semi-finished products qualified identification OKPass qualified semi-finished products applicable;

2, (half) finished products unqualified, unqualified, red 1CM(width)×3CM(length) unqualified (half) finished products applicable.