EP0046740A2
Expired / Lapsed
EP
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A method and device for testing filters
Assignee: Camfil AB
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Filing: 1981-08-20
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Granted: —
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Expires: 2001-08-20
Abstract
Abstract A method and a device for measuring the separation ability of filters comprising measurement of the particle concentration before and after the filter via a particle counter (17).
Inventors
- 👤 Jan Gustavsson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 12:48
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; B; B01; B01D; B01D2273/00; B01D2273/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A-method for measuring the separation degree of filters, characterized in that the particle concentration before the filter and after the filter, respectively, is measured alternately in the direction of flow by means of a common particle counter before and after the filter, respectively, and that the values obtained are utilized for calculation of the separation degree.
Claim 2
Dependent Claim
56 words
A-method for measuring the separation degree of filters, characterized in that the particle concentration before the filter and after the filter, respectively, is measured alternately in the direction of flow by means of a common particle counter before and after the filter, respectively, and that the values obtained are utilized for calculation of the separation degree.
Claim 3
Dependent Claim
34 words
A device for carrying out the method according to claim 1, characterized in that it is provided with a particle counter for measuring the concentration of particles before and after the test filter, respectively..
Claim 4
Dependent Claim
50 words
The device of claim 2, characterized in that it comprises a particle counter which can be connected via a valve or valves either to a measuring probe placed before the filter in the direction of flow or to a measuring probe placed after the filter in the direction of flow.
Claim 5
Dependent Claim
51 words
The device of claim 2 or 3, characterized in that before the particle counter additional and cleaner air is supplied to the flow from the room before the filter for dilution of the-sample in order that the particle counter should be able to operate when the particle concentration exceeds its capacity.
Claim 6
Dependent Claim
43 words
The device of claim 2 or 4, characterized in that a recirculation circuit comprising a filter and an air pump. is connected parallelly to the connection of the particle counter to the room before the test filter for dilution of the particle concentration.
Claim 7
Dependent Claim
15 words
The device of any one of claim 2-5, characterized in that the plant is computerized.
References Cited (Backward Citations)
No citation records indexed.
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