- Email: [email protected]
Dry gas seal for a pump
PATENTS wear strip maintains sealing contact with the surface of the wheel. This is achieved by the membrane which forces it into the surface of the wheel. The membrane may be inflated with air. The wear strip may be formed from Teflon, ultra-high molecular weight polyethylene, polypropylene, acetal or nylon. Optionally, the wear strip may be omitted if a highly-durable membrane is used. The surface of the wheel may be a face of the wheel or a circumferential edge. Patent number: WO/2013/082692 Inventors: B.N. Erb, M. Gerber, M.B. Wawryk, D.M. Wintemute and P.L. Pieper Publication date: 13 June 2013
Dry gas seal for a pump Applicant: Nuovo Pignone Spa, Italy Details are presented of systems and methods for assuring the safe working condition of a dry gas seal when a pump or compressor is at a standstill. A small compressor is added to boost the pressure of an intermediate buffer gas, injected into the chamber between a primary seal and a secondary seal. Control components detect when the barrier gas pressure drops below a preconfigured value and when detected, close a valve in a line to a flare safe area, and turns on the compressor. The boosted intermediate buffer gas – nitrogen or dry air – slows the flow of untreated process gas through the primary seal of the dry gas seal and prevents the primary seal from icing up. Patent number: WO/2013/083437 Inventors: C. Del Vescovo, D.A. Ripa and M. Sciancalepore Publication date: 13 June 2013
Seal for a ‘‘sill-free’’ door Applicant: Planet GDZ Ag, Switzerland A seal for a ‘‘sill-free’’ door forms the subject of this patent. It can be lowered automatically, or designed as a friction seal. It has a sealing element for bearing on a floor and sealing a gap between the door leaf and floor. At least part of the seal is designed to have an antimicrobial or micro-biocidal action. This door seal improves hygiene in buildings and is particularly suitable for use in hospitals and clinics. Patent number: WO/2013/082729 Inventor: A. Dintheer Publication date: 13 June 2013
System for sealing an oil chamber in a turbo-machine Applicant: SNECMA, France A system for sealing an oil chamber from an adjoining exterior volume within a turbo14
Sealing Technology
A system for sealing an oil chamber (1 & V1) from an adjoining exterior volume (V2) within a turbo-machine forms the subject of patent WO/2013/083917.
machine forms the subject of this patent. According to the patent, the system for sealing the oil chamber (1 & V1) from the adjoining exterior volume (V2) – both of which are delimited by a mobile rotor in rotation (5) about an axis (L–L) and a part, fixed or mobile (7), includes a first seal (10A), arranged between the rotor (5) and the part (7). A second seal (10B) is mounted between the rotor and the part, and is offset longitudinally relative to the first seal (10A), so as to form with the first seal a sealing chamber (12) delimited by the rotor, part and the two seals (10A & 10B). This system also includes a means (13) for supplying gas (G) to the sealing chamber (12). This gas can be compressed when the rotor begins to turn – the chamber communicating with the oil chamber and/or the adjoining exterior volume via the first and second seals alone, respectively. Patent number: WO/2013/083917 Inventors: D. Igel and D. Leroux Publication date: 13 June 2013
Screw connection containing a seal Applicant: Carl Freudenberg Kg, Germany This invention relates to a seal that is part of a fastening element (1). The associated patent describes the fastening element and a washer (2), both of which are arranged coaxially and axially adjacent to one another. The washer has a sealing bead (3) made from a rubber–elastic material on the outer circumference, which makes contact the underside (4) of the fastening element (creating a seal) during the correct use of the seal. The fastening element has a flange (5) on the side axially facing the washer (2), having an underside (6) axially facing the washer (2). The latter has a top side axially facing the flange (5), wherein the underside (6) of the flange (5) and the top side (7) of the washer abut, creating a seal. The underside (6) of the flange (5) and the top side (7) of the washer (2) are substantially congruent, and the sealing
bead (3) abuts the outer circumferential boundary (8) of the underside (6) of the flange (5), providing sealing action. Patent number: WO/2013/087134 Inventors: F. Lauer, J. Eckstein, C. Mitschkal and T. Kramer Publication date: 20 June 2013
Patent WO/2013/087134 relates to a seal that is part of a fastening element (1). It describes the fastening element and a washer (2) that has a sealing bead (3) made from a rubber–elastic material.
Seal ring Applicant: Daikin Industries Ltd, Japan The purpose of this invention is to provide a seal ring that has excellent resistance to abrasion. The ring described is formed from a resin composition containing an aromatic polyether ketone resin (I) and a fluorine resin (II). The latter is a copolymer of tetrafluoroethylene and a perfluoro ethylenically unsaturated compound represented by the general formula: CF2=CF–Rf1, where Rf1 represents –CF3 or –ORf2 (Rf2 is a perfluoroalkyl group with a carbon number of 1– 5) Furthermore, the melt viscosity ratio (I)/(II) between the aromatic polyether ketone resin (I) and the fluorine resin (II) is 0.3–5.0. Patent number: WO/2013/088967 Inventors:Ê°Ê >ÃÕ`>Ê>`Ê9°Ê`>V Publication date: 20 June 2013
October 2013
Dry gas seal for a pump Applicant: Nuovo Pignone Spa, Italy Details are presented of systems and methods for assuring the safe working condition of a dry gas seal when a pump or compressor is at a standstill. A small compressor is added to boost the pressure of an intermediate buffer gas, injected into the chamber between a primary seal and a secondary seal. Control components detect when the barrier gas pressure drops below a preconfigured value and when detected, close a valve in a line to a flare safe area, and turns on the compressor. The boosted intermediate buffer gas – nitrogen or dry air – slows the flow of untreated process gas through the primary seal of the dry gas seal and prevents the primary seal from icing up. Patent number: WO/2013/083437 Inventors: C. Del Vescovo, D.A. Ripa and M. Sciancalepore Publication date: 13 June 2013
Seal for a ‘‘sill-free’’ door Applicant: Planet GDZ Ag, Switzerland A seal for a ‘‘sill-free’’ door forms the subject of this patent. It can be lowered automatically, or designed as a friction seal. It has a sealing element for bearing on a floor and sealing a gap between the door leaf and floor. At least part of the seal is designed to have an antimicrobial or micro-biocidal action. This door seal improves hygiene in buildings and is particularly suitable for use in hospitals and clinics. Patent number: WO/2013/082729 Inventor: A. Dintheer Publication date: 13 June 2013
System for sealing an oil chamber in a turbo-machine Applicant: SNECMA, France A system for sealing an oil chamber from an adjoining exterior volume within a turbo14
Sealing Technology
A system for sealing an oil chamber (1 & V1) from an adjoining exterior volume (V2) within a turbo-machine forms the subject of patent WO/2013/083917.
machine forms the subject of this patent. According to the patent, the system for sealing the oil chamber (1 & V1) from the adjoining exterior volume (V2) – both of which are delimited by a mobile rotor in rotation (5) about an axis (L–L) and a part, fixed or mobile (7), includes a first seal (10A), arranged between the rotor (5) and the part (7). A second seal (10B) is mounted between the rotor and the part, and is offset longitudinally relative to the first seal (10A), so as to form with the first seal a sealing chamber (12) delimited by the rotor, part and the two seals (10A & 10B). This system also includes a means (13) for supplying gas (G) to the sealing chamber (12). This gas can be compressed when the rotor begins to turn – the chamber communicating with the oil chamber and/or the adjoining exterior volume via the first and second seals alone, respectively. Patent number: WO/2013/083917 Inventors: D. Igel and D. Leroux Publication date: 13 June 2013
Screw connection containing a seal Applicant: Carl Freudenberg Kg, Germany This invention relates to a seal that is part of a fastening element (1). The associated patent describes the fastening element and a washer (2), both of which are arranged coaxially and axially adjacent to one another. The washer has a sealing bead (3) made from a rubber–elastic material on the outer circumference, which makes contact the underside (4) of the fastening element (creating a seal) during the correct use of the seal. The fastening element has a flange (5) on the side axially facing the washer (2), having an underside (6) axially facing the washer (2). The latter has a top side axially facing the flange (5), wherein the underside (6) of the flange (5) and the top side (7) of the washer abut, creating a seal. The underside (6) of the flange (5) and the top side (7) of the washer (2) are substantially congruent, and the sealing
bead (3) abuts the outer circumferential boundary (8) of the underside (6) of the flange (5), providing sealing action. Patent number: WO/2013/087134 Inventors: F. Lauer, J. Eckstein, C. Mitschkal and T. Kramer Publication date: 20 June 2013
Patent WO/2013/087134 relates to a seal that is part of a fastening element (1). It describes the fastening element and a washer (2) that has a sealing bead (3) made from a rubber–elastic material.
Seal ring Applicant: Daikin Industries Ltd, Japan The purpose of this invention is to provide a seal ring that has excellent resistance to abrasion. The ring described is formed from a resin composition containing an aromatic polyether ketone resin (I) and a fluorine resin (II). The latter is a copolymer of tetrafluoroethylene and a perfluoro ethylenically unsaturated compound represented by the general formula: CF2=CF–Rf1, where Rf1 represents –CF3 or –ORf2 (Rf2 is a perfluoroalkyl group with a carbon number of 1– 5) Furthermore, the melt viscosity ratio (I)/(II) between the aromatic polyether ketone resin (I) and the fluorine resin (II) is 0.3–5.0. Patent number: WO/2013/088967 Inventors:Ê°Ê >ÃÕ`>Ê>`Ê9°Ê`>V Publication date: 20 June 2013
October 2013