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High vacuum equipment from NGN
Vacuum
news ease of refilling and a broad base for extra stability. Advantages claimed for the dispenser include: exceptionally long life; eliminates sticking of caps, fouling of fluids due to rust, and breakage. Foaming efficiency, safety temperature range and overall performance of the leak detecting fluids are subjected to strict laboratory testing and for special applications specific formulations are available. Singer Products Co, Inc (Sin Par Division), USA Circle number 5.5 on Reader
Enquiry Service
card
Helium leak detector The model MS9 leak detector has been recently introduced by Veeco instruments Ltd. Hampshire, England. An important feature of this detector is the mass spectrometer tube design (“Veetube”) with inclined limbs at an angle of 60”. The construction is such as to permit indefinite operation at maximum sensitivity level. Positive ions, produced by the electron bombardment of gas molecules entering the Veetube, are rejected by an ion repeller grid andelectron emission is self regulating by a built-in electrostatic focus electrode. Baffle plates prevent the passage of ions other than helium being deflected through the tube. Ion current is detected by a stable electrometer amplifier. The sensitivity is given as one part helium in 10’ parts air or leaks of 7.6 x lo-” torr litres per second at full pumping speed. Leaks of the order of 7.6 x lo-r3 torr litres/sec may be detected using accumulation techniques by partially shutting off the pumps with the accumulator valve. Full details of construction and operation are given in a 4-page leaflet. Veeco Instruments Ltd, UK Circle number 56 on Reader Enquiry Service
Vacuum glove box HE-133-5 Model HIX-133-5 standard Vacuum Glove Box The new model, designed and produced at Vacuum/Atmospheres Corporation, North Hollywood, California, USA, is a modified 30 inch diameter cylinder with a flat bottom working surface. This replaces the former complete cylinder configuration which used a removable bottom tray. The improved design affords a more solid working platform, eliminates dead space and dirt trap space beneath the tray and provides the same working area with less volume to evacuate. The working space is 36 inches long with a 12 inch id antechamber and the access door features a full end-ownina double O-ring seal. Standard construction is in type 6061 T6 al&ninium nil,.., . arr”J Vacaum Atmospheres Corporation, USA Circle number 53 on Reader Enquiry Service card Bakeable plate valve A bakeable plate valve, designed for the isolation of ion pumps, cryopumps and sublimation pumps has been announced by Vacuum Generators Limited of East Grinstead, Sussex. This high conductance valve (type PlOO) is claimed to permit very rapid pumpdown without starting difficulties on ion pumps and to minimize the accumulation of “history”. Ion pumps may be left running with the system at atmosphere, providing an uncontaminated titanium surface to deal with gas load on pumping down. By cracking the valve open while observing the pump current it is possible to high vacuum pump a system which has only been backed to 0.1 torr. The PlOO valve is of argon arc welded construction and employs the stainless steel knife edge to copper pad principle of closure. Vacuum Generators Limited, UK CircIe number 54 on Reader Enquiry Service card Five-second leak detector for industrial systems and products The Sherlock 5-Second Leak detector, applicable to any system which may be leak tested by air or gas, is now available from the Sin Par Division of Singer Products Co Inc. The leak detector is manufactured by Winton Products Co. Various sizes and formulations are available as well as a small plastic dispenser which is claimed to be rustproof, leak-proof and break-proof. The brush applicator is in brass with high-absorption folded bristles with a wide mouth for 104
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Getter ion pumps Ferranti Limited have recently issued a series of data sheets describing their range of setter ion uumns. Seven caoacities are described ranging f;om 0.2 to 140 htre&econd. All ‘pumps are of robust construction, bakeable, and are rated with pressure ranges of 1O-2 to below lO-1o torr. Working life is given as typically 50,000 hours for continuous operation at lo-* torr but the working life is inversely proportional to the operating pressure. Reconditioning services are available. These pumps can produce very clean high vacuum and are recommended for the evacuation of cathode ray tubes, thermionic valves, mass spectrometers and experimental work. Ferranti Limited, UK Circle number 57 on Reader Enquiry Service
Card
High vacuum equipment from NGN Recent additions to the catalogue of NGN Limited, Lancashire, include: two models of 12 inch coating plants designed to meet the requirements of the electron microscopist by offering alternative pumping systems as well as incorporating the Oates carbon-evaporation jig assembly (the two models differ only in that the standard model is manually controlled while the other is semi-automatic); 18 inch and 19 inch coating units are also shown as well as a degassing unit for electron microscope plates; a laboratory furnace designed for the processing of specimens at lO-2 torr with evacuation by two stage gas ballasted rotary pump (110 litres/minute); air cooled 4 inch pumping systems and 4 inch pumping systems. NGN Limitpd, UK Circle number 58 on Reader Enquiry Service card 150 kVA 3000°C Horizontal Furnace Spembly Technical Products Ltd have announced the latest addition to their range of high temperature graphite element furnaces: a new 150 kVA Horizontal Furnace designed and built to meet the production requirements of high tensile graphitized carbon fibres. The 150 kVA furnace has been developed from STP’s range of standard high temperature research furnaces and is a 3000°C production unit, with a horizontal graphite element consisting of nine compound element rods in a three-phase star connected configuration. The constant temperature hot zone is 6 inches diameter by 36 inches long, but the thermal design permits the working diameter to be increased to approximately 8 inches with provision for a continuous charge loading and unloading system if required. The maximum working temperature can be achieved within three hours on full
news ease of refilling and a broad base for extra stability. Advantages claimed for the dispenser include: exceptionally long life; eliminates sticking of caps, fouling of fluids due to rust, and breakage. Foaming efficiency, safety temperature range and overall performance of the leak detecting fluids are subjected to strict laboratory testing and for special applications specific formulations are available. Singer Products Co, Inc (Sin Par Division), USA Circle number 5.5 on Reader
Enquiry Service
card
Helium leak detector The model MS9 leak detector has been recently introduced by Veeco instruments Ltd. Hampshire, England. An important feature of this detector is the mass spectrometer tube design (“Veetube”) with inclined limbs at an angle of 60”. The construction is such as to permit indefinite operation at maximum sensitivity level. Positive ions, produced by the electron bombardment of gas molecules entering the Veetube, are rejected by an ion repeller grid andelectron emission is self regulating by a built-in electrostatic focus electrode. Baffle plates prevent the passage of ions other than helium being deflected through the tube. Ion current is detected by a stable electrometer amplifier. The sensitivity is given as one part helium in 10’ parts air or leaks of 7.6 x lo-” torr litres per second at full pumping speed. Leaks of the order of 7.6 x lo-r3 torr litres/sec may be detected using accumulation techniques by partially shutting off the pumps with the accumulator valve. Full details of construction and operation are given in a 4-page leaflet. Veeco Instruments Ltd, UK Circle number 56 on Reader Enquiry Service
Vacuum glove box HE-133-5 Model HIX-133-5 standard Vacuum Glove Box The new model, designed and produced at Vacuum/Atmospheres Corporation, North Hollywood, California, USA, is a modified 30 inch diameter cylinder with a flat bottom working surface. This replaces the former complete cylinder configuration which used a removable bottom tray. The improved design affords a more solid working platform, eliminates dead space and dirt trap space beneath the tray and provides the same working area with less volume to evacuate. The working space is 36 inches long with a 12 inch id antechamber and the access door features a full end-ownina double O-ring seal. Standard construction is in type 6061 T6 al&ninium nil,.., . arr”J Vacaum Atmospheres Corporation, USA Circle number 53 on Reader Enquiry Service card Bakeable plate valve A bakeable plate valve, designed for the isolation of ion pumps, cryopumps and sublimation pumps has been announced by Vacuum Generators Limited of East Grinstead, Sussex. This high conductance valve (type PlOO) is claimed to permit very rapid pumpdown without starting difficulties on ion pumps and to minimize the accumulation of “history”. Ion pumps may be left running with the system at atmosphere, providing an uncontaminated titanium surface to deal with gas load on pumping down. By cracking the valve open while observing the pump current it is possible to high vacuum pump a system which has only been backed to 0.1 torr. The PlOO valve is of argon arc welded construction and employs the stainless steel knife edge to copper pad principle of closure. Vacuum Generators Limited, UK CircIe number 54 on Reader Enquiry Service card Five-second leak detector for industrial systems and products The Sherlock 5-Second Leak detector, applicable to any system which may be leak tested by air or gas, is now available from the Sin Par Division of Singer Products Co Inc. The leak detector is manufactured by Winton Products Co. Various sizes and formulations are available as well as a small plastic dispenser which is claimed to be rustproof, leak-proof and break-proof. The brush applicator is in brass with high-absorption folded bristles with a wide mouth for 104
card
Getter ion pumps Ferranti Limited have recently issued a series of data sheets describing their range of setter ion uumns. Seven caoacities are described ranging f;om 0.2 to 140 htre&econd. All ‘pumps are of robust construction, bakeable, and are rated with pressure ranges of 1O-2 to below lO-1o torr. Working life is given as typically 50,000 hours for continuous operation at lo-* torr but the working life is inversely proportional to the operating pressure. Reconditioning services are available. These pumps can produce very clean high vacuum and are recommended for the evacuation of cathode ray tubes, thermionic valves, mass spectrometers and experimental work. Ferranti Limited, UK Circle number 57 on Reader Enquiry Service
Card
High vacuum equipment from NGN Recent additions to the catalogue of NGN Limited, Lancashire, include: two models of 12 inch coating plants designed to meet the requirements of the electron microscopist by offering alternative pumping systems as well as incorporating the Oates carbon-evaporation jig assembly (the two models differ only in that the standard model is manually controlled while the other is semi-automatic); 18 inch and 19 inch coating units are also shown as well as a degassing unit for electron microscope plates; a laboratory furnace designed for the processing of specimens at lO-2 torr with evacuation by two stage gas ballasted rotary pump (110 litres/minute); air cooled 4 inch pumping systems and 4 inch pumping systems. NGN Limitpd, UK Circle number 58 on Reader Enquiry Service card 150 kVA 3000°C Horizontal Furnace Spembly Technical Products Ltd have announced the latest addition to their range of high temperature graphite element furnaces: a new 150 kVA Horizontal Furnace designed and built to meet the production requirements of high tensile graphitized carbon fibres. The 150 kVA furnace has been developed from STP’s range of standard high temperature research furnaces and is a 3000°C production unit, with a horizontal graphite element consisting of nine compound element rods in a three-phase star connected configuration. The constant temperature hot zone is 6 inches diameter by 36 inches long, but the thermal design permits the working diameter to be increased to approximately 8 inches with provision for a continuous charge loading and unloading system if required. The maximum working temperature can be achieved within three hours on full