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A filter arrangement includes a media construction including a corrugated sheet secured to a flat sheet rolled into a coiled construction. A frame and a first seal member are provided. The frame secures the first seal member to the coiled construction. The first seal member is preferably oriented to

A filter arrangement includes a media construction including a corrugated sheet secured to a flat sheet rolled into a coiled construction. A frame and a first seal member are provided. The frame secures the first seal member to the coiled construction. The first seal member is preferably oriented to form a radial seal with a housing. A second seal member is secured to the outer annular surface of the coiled construction. The second seal member includes a gasket extension having first and second opposite ends; an attachment portion; and a protrusion extending from the attachment portion. The second seal member is preferably oriented to form an axial seal with a housing. Air cleaners preferably utilizing filter arrangements as described herein operably installed within housings. Methods of installing, filtering, assembling, and servicing preferably include arrangements as described herein.

대표청구항 ▼

A filter arrangement includes a media construction including a corrugated sheet secured to a flat sheet rolled into a coiled construction. A frame and a first seal member are provided. The frame secures the first seal member to the coiled construction. The first seal member is preferably oriented to

A filter arrangement includes a media construction including a corrugated sheet secured to a flat sheet rolled into a coiled construction. A frame and a first seal member are provided. The frame secures the first seal member to the coiled construction. The first seal member is preferably oriented to form a radial seal with a housing. A second seal member is secured to the outer annular surface of the coiled construction. The second seal member includes a gasket extension having first and second opposite ends; an attachment portion; and a protrusion extending from the attachment portion. The second seal member is preferably oriented to form an axial seal with a housing. Air cleaners preferably utilizing filter arrangements as described herein operably installed within housings. Methods of installing, filtering, assembling, and servicing preferably include arrangements as described herein. 4 mol. % nitrogen. 12. The process of claim 1, wherein said adsorbent in said first pressure swing adsorption unit is a crystalline titanium silicate molecular sieve. 13. The process of claim 12, wherein said molecular sieve is CTS-1. 14. The process of claim 12, wherein said molecular sieve is barium-ETS-4. 15. The process of claim 1, wherein said hydrocarbon-selective absorbent is an amorphous carbon or silica gel adsorbent. 16. The process of claim 1 wherein said adsorbent in said first pressure swing adsorption unit is selective for carbon dioxide. 17. The process of claim 16 wherein said adsorbent selective for carbon dioxide is a silica gel. 18. The process of claim 16 wherein said adsorbent selective for carbon dioxide is activated carbon. 19. The process of claim 16 wherein said natural gas feed stream contains less than 4 mol. % nitrogen. 20. The process of claim 19 wherein said adsorbent selective for carbon dioxide is a silica gel. 21. The process of claim 1 wherein said first adsorbent in said first pressure swing adsorbent unit contains a mixture of CTS-1 and an equilibrium adsorbent wherein said equilibrium adsorbent has a greater affinity for C3+hydrocarbon over methane. 22. The process of claim 21 where said equilibrium adsorbent is silica gel, ZnX, activated carbon or alumina. 23. The process of claim 1, wherein said first product stream contains over 90 mol. % methane. 24. The process of claim 1, comprising subsequent to forming said combined stream of methane and co-adsorbed hydrocarbons, separating said co-adsorbed hydrocarbons from said combined stream. 25. The process of claim 24, wherein said co-adsorbed hydrocarbons comprise C3+hydrocarbons and separating said C3+hydrocarbons from said combined stream by condensing said C3+hydrocarbons. 26. The process of claim 1, wherein said natural gas feed stream contains 4 to 15 mol. % C3+hydrocarbons. 27. The process of claim 1, wherein said natural gas feed stream contains greater than 4 mol. % nitrogen. 28. A process for the separation of nitrogen, carbon dioxide or both from a natural gas feed stream, and the recovery of C3+hydrocarbons from said feed stream, which comprises: passing said natural gas feed stream to a first pressure swing adsorption unit containing a crystalline titanium silicate, adsorbent so as to preferentially adsorb nitrogen and carbon dioxide and produce a first product stream containing at least 90 mol. % methane and a low pressure waste stream having a higher molar concentration of nitrogen and carbon dioxide than said feed stream, said waste stream further containing a portion of said C3+hydrocarbons contained in said feed stream and which have been co-adsorbed on said titanium silicate adsorbent; passing said waste stream to a second adsorption unit containing a hydrocarbon-selective adsorbent so as to preferentially adsorb said co-adsorbed C3+hydrocarbons to produce a second product stream enriched with nitrogen and carbon dioxide; and directing a methane-containing stream having a pressure intermediate the pressure of said first product stream and said waste stream to said second adsorption unit to purge said hydrocarbon-selective adsorbent and produce a combined stream of methane and said co-adsorbed C3+hydrocarbons adsorbed by said hydrocarbon-selective adsorbent. 29. The process of claim 28 wherein said crystalline titanium silicate is CTS-1 or an alkaline earth-exchanged ETS-4. 30. The process of claim 29 wherein said natural gas feed stream contains greater than 2 mol. % carbon dioxide, said first pressure swing adsorption unit further containing a silica gel carbon dioxide-selective adsorbent. 31. The process of claim 29 wherein said natural gas feed stream contains greater than 2 mol. % carbon dioxide, said first pressure swing adsorption unit further containing an activated carbon or carbon molecular sieve carbon dioxide- selective adsorbent. 32. The process of claim 28 wherein said natural gas feed stream contains greater than 4 mol. % nitrogen. 33. The process of claim 28 wherein said natural gas feed stream contains less than 2 mol. % carbon dioxide. 34. The process of claim 28 wherein said natural gas feed stream contains greater than 2 mol. % carbon dioxide, said first pressure swing adsorption unit further containing a silica gel carbon dioxide-selective adsorbent. 35. The process of claim 28 wherein said natural gas feed stream contains greater than 2 mol. % carbon dioxide, said first pressure swing adsorption unit further containing an activated carbon or carbon molecular sieve carbon dioxide-selective adsorbent. 36. The process of claim 28 wherein said first pressure swing adsorption unit contains an additional adsorbent which has a selectivity for C3+hydrocarbons greater than a selectivity for methane. 37. The process of claim 36 wherein said additional adsorbent is a silica gel, ZnX, activated carbon or alumina. 38. A process for the separation of carbon dioxide from a natural gas feed stream, and the recovery of C3+hydrocarbons from said feed stream, which comprises: passing said natural gas feed stream to a first pressure swing adsorption unit containing a silica gel adsorbent so as to preferentially adsorb carbon dioxide and produce a first product stream containing at least 90 mol. % methane and a low pressure waste stream having a higher molar concentration of carbon dioxide than said feed stream, said waste stream further containing a portion of said C3+hydrocarbons contained in said feed stream and which have been co-adsorbed on said silica gel adsorbent; passing said waste stream to a second adsorption unit containing a hydrocarbon-selective adsorbent so as to preferentially adsorb said co-adsorbed C3+hydrocarbons to produce a second product stream enriched with carbon dioxide; and directing a methane-containing stream having a pressure intermediate the pressure of said first product stream and said waste stream to said swing adsorption unit to purge said hydrocarbon-selective adsorbent and produce a combined stream of methane and said co-adsorbed C3+hydrocarbons adsorbed by said hydrocarbon-selective adsorbent. 39. The process of claim 38 wherein said natural gas feed stream contains less than 4 mol. % nitrogen and greater than 2 mol. % carbon dioxide. 40. The process of claim 39 wherein said natural gas feed stream contains at least 4 mol. % carbon dioxide. 41. The process of claim 38 wherein said first pressure swing adsorption unit contains an additional adsorbent which has a selectivity for C3+hydrocarbons greater than a selectivity for methane. 42. The process of claim 41 wherein said additional adsorbent is a silica gel, ZnX, activated carbon or alumina. from the first pressure swing adsorption stage which purges the adsorbent in the second stage and forms a combined stream comprising methane and C3+hydrocarbons. The C3+hydrocarbons can be separated from the methane such as by compression with flash separation or refrigeration.