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New leak valve controls small leaks
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Vacuum News It can also be used as a roughing valve for small systems. The seal consists of a movable piston with an optically fiat sapphire face and a " captured " copper alloy gasket. The hard, smooth sapphire pressed against the gasket forms a seal that is describe.d as completely free from friction or siezing. When operated at room temperature, hundreds of closures are typical before gasket replacement is necessary. Extremely low torque drive permits finger knob leak rate adjustment.
Varian Associates, Vacuum Products Division, 611 Hansen Way, Palo Alto, California, U.S.A. Vacuum system is " baked out " with electrons A new electron beam evaporator developed by the M R C Manufacturing Corp. is said to " bake out " v a c u u m systems with a stream of high velocity electrons. The process, trade marked " I.E.B." for " Internal Electronic Bakeout ", was first applied on MRC's new Electron Beam thin film evaporator : an I.E.B. gun mouted on a push-pull ball joint is now standard on M R C ' s Model EVD96-BJ. The gun uses the same power supply as the V4-200 gun used for evaporation. Patents covering the new process have been applied for.
M R C Manufacturing Corp., Orangeburg, New York, U.S.A. New line of implosion-proof bell jars A new line of aluminium, implosion-proof bell jars for a wide variety of vacuum applications has been announced by the Central Scientific Co. Each are spun from a single piece of aluminium and have a plastic window for viewing the chamber's interior. It is claimed that the light weight of these chambers eliminates the need for separate hoists or guards required with glass bell jars of similar size. Central Scientific Co., 6450 W. Cortland Street, Chicago 35,
lllinois, U.S.A. Superconducting niobium films through the viewing glass of an Peter Fowler, of NRC's research be the first practicable means of
developed by NRC are checked electron beam furnace by physicist division. The technique is said to producing these films commercially
New high vacuum valve for aggressive liquids and gases An improved version of the BiPI experimental valve, originally devized by R. H. Biddulph and P, H. Plesch of North Staffordshire University for studies on the cationic polymerization of isobutene and styrene, has been developed by the Scientific Instrument & Model Co. Ltd. and is now in full production in Britain for the home and export markets. Although of all-metal construction, the new valve requires no lubrication, and is therefore suitable for handling gases and liquids such as titanium tetrachloride and some of the halogenoacetic acids. It is also reliably vacuum-tight at moderate and low temperatures and is claimed to have superseded the mercury cut-off and other makeshift arrangements, particularly where highly reactive fluids are involved. The valve has a long operating life, and if the seatings are not allowed to become excessively worn, may be returned to the manufacturers for reconditioning. Whilst primarily intended for the purpose described, it may have other spheres of use and the manufacturers will be pleased to advise on them if consulted.
The Scientific Instrument & Model Co. Ltd., Brampton Street, Ross-on-Wye, Herefordshire, Great Britain. New leak valve controls small leaks A new, precision-buiR, bakeable ultra-high vacuum leak valve, claimed to consistently be able to control leaks as small as 1 × 10-a° torr-litres/sec, has been announced by the Vacuum Products Division of Varian Associates. The entire valve, including drive mechanism, is said to be bakeable open or closed to 450°C, and to offer unprecedented control sensitivity and stability over a wide range of leak rates.
MRC Manufacturing Corp.'s new gun "bakes out" vacuum systems with high velocity electrons More efficient vacuum sintering furnace A high temperature vacuum sintering furnace 75 per cent more efficient than the earlier Model 2915 has been announced by the N R C Equipment Corp., a subsidiary of the National Research Corp. A total workspace of about 280 cu. in. is available compared to 160 cu. in. in the earlier system.
Vacuum News It can also be used as a roughing valve for small systems. The seal consists of a movable piston with an optically fiat sapphire face and a " captured " copper alloy gasket. The hard, smooth sapphire pressed against the gasket forms a seal that is describe.d as completely free from friction or siezing. When operated at room temperature, hundreds of closures are typical before gasket replacement is necessary. Extremely low torque drive permits finger knob leak rate adjustment.
Varian Associates, Vacuum Products Division, 611 Hansen Way, Palo Alto, California, U.S.A. Vacuum system is " baked out " with electrons A new electron beam evaporator developed by the M R C Manufacturing Corp. is said to " bake out " v a c u u m systems with a stream of high velocity electrons. The process, trade marked " I.E.B." for " Internal Electronic Bakeout ", was first applied on MRC's new Electron Beam thin film evaporator : an I.E.B. gun mouted on a push-pull ball joint is now standard on M R C ' s Model EVD96-BJ. The gun uses the same power supply as the V4-200 gun used for evaporation. Patents covering the new process have been applied for.
M R C Manufacturing Corp., Orangeburg, New York, U.S.A. New line of implosion-proof bell jars A new line of aluminium, implosion-proof bell jars for a wide variety of vacuum applications has been announced by the Central Scientific Co. Each are spun from a single piece of aluminium and have a plastic window for viewing the chamber's interior. It is claimed that the light weight of these chambers eliminates the need for separate hoists or guards required with glass bell jars of similar size. Central Scientific Co., 6450 W. Cortland Street, Chicago 35,
lllinois, U.S.A. Superconducting niobium films through the viewing glass of an Peter Fowler, of NRC's research be the first practicable means of
developed by NRC are checked electron beam furnace by physicist division. The technique is said to producing these films commercially
New high vacuum valve for aggressive liquids and gases An improved version of the BiPI experimental valve, originally devized by R. H. Biddulph and P, H. Plesch of North Staffordshire University for studies on the cationic polymerization of isobutene and styrene, has been developed by the Scientific Instrument & Model Co. Ltd. and is now in full production in Britain for the home and export markets. Although of all-metal construction, the new valve requires no lubrication, and is therefore suitable for handling gases and liquids such as titanium tetrachloride and some of the halogenoacetic acids. It is also reliably vacuum-tight at moderate and low temperatures and is claimed to have superseded the mercury cut-off and other makeshift arrangements, particularly where highly reactive fluids are involved. The valve has a long operating life, and if the seatings are not allowed to become excessively worn, may be returned to the manufacturers for reconditioning. Whilst primarily intended for the purpose described, it may have other spheres of use and the manufacturers will be pleased to advise on them if consulted.
The Scientific Instrument & Model Co. Ltd., Brampton Street, Ross-on-Wye, Herefordshire, Great Britain. New leak valve controls small leaks A new, precision-buiR, bakeable ultra-high vacuum leak valve, claimed to consistently be able to control leaks as small as 1 × 10-a° torr-litres/sec, has been announced by the Vacuum Products Division of Varian Associates. The entire valve, including drive mechanism, is said to be bakeable open or closed to 450°C, and to offer unprecedented control sensitivity and stability over a wide range of leak rates.
MRC Manufacturing Corp.'s new gun "bakes out" vacuum systems with high velocity electrons More efficient vacuum sintering furnace A high temperature vacuum sintering furnace 75 per cent more efficient than the earlier Model 2915 has been announced by the N R C Equipment Corp., a subsidiary of the National Research Corp. A total workspace of about 280 cu. in. is available compared to 160 cu. in. in the earlier system.