GB1387408A - Testing of filters - Google Patents

Testing of filters

Info

Publication number
GB1387408A
GB1387408A GB5121471A GB5121471A GB1387408A GB 1387408 A GB1387408 A GB 1387408A GB 5121471 A GB5121471 A GB 5121471A GB 5121471 A GB5121471 A GB 5121471A GB 1387408 A GB1387408 A GB 1387408A
Authority
GB
United Kingdom
Prior art keywords
filter
nuclei
pollak
counter
downstream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5121471A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB5121471A priority Critical patent/GB1387408A/en
Publication of GB1387408A publication Critical patent/GB1387408A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials

Abstract

1387408 Testing filters UNITED KING- DOM ATOMIC ENERGY AUTHORITY 31 Oct 1972 [3 Nov 1971] 51214/71 Heading BIT [Also in Division Gl] In a method and apparatus for testing filters a gas stream flowing through filter 1 entrains condensation nuclei generated by combustion of a solution of (e.g. ammonium sulphide) in a flammable solvent (e.g. methylated spirit) in burner 4, and the concentration of the nuclei in the gas upstream and downstream of the filter is measured by the use of Pollak counter 6. In the Pollak counter which receives separate samples from upstream and downstream of the filter, water vapour is condensed on the nuclei and concentration of the nuclei is determined optically by light transmission from light source 9 to photoelectric cell 10 associated with voltmeter 11. The Pollak counter to which gas enters at 5 comprises a metal tube with a porous lining 7, transparent plates 8, water supply 12 vacuum pump 19, pressure pump 14 and filter 15, pressure gauge 16 and valved vent pipe 17.
GB5121471A 1971-11-03 1971-11-03 Testing of filters Expired GB1387408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5121471A GB1387408A (en) 1971-11-03 1971-11-03 Testing of filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5121471A GB1387408A (en) 1971-11-03 1971-11-03 Testing of filters

Publications (1)

Publication Number Publication Date
GB1387408A true GB1387408A (en) 1975-03-19

Family

ID=10459087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5121471A Expired GB1387408A (en) 1971-11-03 1971-11-03 Testing of filters

Country Status (1)

Country Link
GB (1) GB1387408A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046740A2 (en) * 1980-08-21 1982-03-03 Camfil Ab A method and device for testing filters
EP0623376A1 (en) * 1993-05-03 1994-11-09 HumanAir Patentverwertungsgesellschaft mbH Device for monitoring the run out time of filter installations in air conditioning systems
GB2330914A (en) * 1997-04-17 1999-05-05 Samsung Electronics Co Ltd Testing the filtration efficiency of cloth materials
EP1124126A2 (en) * 2000-02-04 2001-08-16 E.I. Du Pont De Nemours And Company Barrier test apparatus and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046740A2 (en) * 1980-08-21 1982-03-03 Camfil Ab A method and device for testing filters
EP0046740A3 (en) * 1980-08-21 1982-03-10 Camfil Ab A method and device for testing filters
EP0623376A1 (en) * 1993-05-03 1994-11-09 HumanAir Patentverwertungsgesellschaft mbH Device for monitoring the run out time of filter installations in air conditioning systems
GB2330914A (en) * 1997-04-17 1999-05-05 Samsung Electronics Co Ltd Testing the filtration efficiency of cloth materials
GB2330914B (en) * 1997-04-17 2001-07-18 Samsung Electronics Co Ltd Method and apparatus for testing the filtration efficiency of cloth materials intended for use in a clean room environment
EP1124126A2 (en) * 2000-02-04 2001-08-16 E.I. Du Pont De Nemours And Company Barrier test apparatus and method
EP1124126A3 (en) * 2000-02-04 2003-10-29 E.I. Du Pont De Nemours And Company Barrier test apparatus and method

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee