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Ultra-high temperature furnace
VA C U U M N E W S Technical and Industrial Developments Kinney liquid jet pump DECEMBER 1964
Kinney Vacuum Division have recently introduced an industrial vacuum pump that handles large quantities of condensable vapour and is impervious to solid particles and most corrosive gases. Designated the KLJ, it is stated to operate on low vacuum areas from 760 to 25 torr over a capacity range from 5 to 170 cubic feet per minute. The unit incorporates a high-speed venturi-nozzle through which a centrifugal pump (the only moving part) circulates a hurling medium and returns it to a separation chamber. Forced at high velocity across the gap between the nozzle and the venturi, the medium (usually water) entrains air and gases in multi-jet streams producing a continuous vacuum. The mixture of air and water is discharged through the venturi tangentially into the separation chamber causing the water in the chamber to rotate. This results in a centrifugal action that forces the water to the periphery of the chamber, while the lighter air flows to the centre and is discharged. Replacement of the water evaporated from the unit is controlled by a solenoid valve actuated by a float switch. When hot gases or vapours are handled, a temperature limit switch can be supplied which will activate the solenoid valve, enabling cool water to be added to the system, should the water temperature rise above a predetermined level any excess water is drained away. The makers state that the pump was designed for use with materials that cannot be handled by standard oil-sealed or dry mechanical pumps without installing auxiliary apparatus. Kinney Vacuum Division, The New York Air Brake Co., 3529
Page Technical and Industrial Developments
485
Liquid jet pump--ultra-high temperature furnace --electron microscopy plant--cryogenics temperature indicator--stainless steel valves--twostage p u m p - - v a c u u m tooling--miniature coating unit--bell jars--air-cooled diffusion pumps
Commercial News
489
Butterfield sales conference--vacuum melting plant--Nukleardienst G . m . b . H . - - N e m o Heat Treatments Ltd. • Manufacturers and others are invited to submit information for inclusion in this feature, addressed to the Vacuum News Editor, Vacuum, Pergamon Press, 4 & 5 Fitzroy Square, London, W.I. • For further information on any matter mentioned in " Vacuum News ", tear out and post one of the R E A D E R E N Q U I R Y SERVICE CARDS. Readers in the U.S.A. should use the cards addressed to New York ; all other readers are requested to use the cards addressed to London.
Washington St., Boston, Massachusetts, U.S.A.
Ultra-high temperature furnace Alloyd General Corporation have announced the availability of a vacuum furnace, H F 348, providing very high temperatures. The furnace consists of an 18 in. x 24 in. stainless work chamber with vacuum system ; an internal rig for mounting work pieces ; beam scanning controls and instrumentation. The heat source is a self-accelerated electron beam gun which permits accurate heat flux control from ambient to 6000°F, with a heat input uniformity in the order of ~ 1 per cent. The electron beam gun has a minimum beam spot size of 10 mils which is scanned to cover an area up to 3 in. × 3 in. Heat input over the scanned area can be varied from 2 to 300 BTU/sec/ft ~, and a uniform heat input distribution is achieved by synchronized scanning of the beam along two mutually perpendicular axis. The manufacturers state that the system is capable of producing a vacuum of 5 × 10 -8 torr in less than three hours. Typical applications for the new furnace include research, development, and testing under high vacuum and ultra-high temperature. AIIoyd General Corporation, 81 Hicks Avenue, Medford, Massachusetts 02155, U.S.A.
HF 348--No shielding is required permitting an unobstructed view of the test sample 485
Kinney Vacuum Division have recently introduced an industrial vacuum pump that handles large quantities of condensable vapour and is impervious to solid particles and most corrosive gases. Designated the KLJ, it is stated to operate on low vacuum areas from 760 to 25 torr over a capacity range from 5 to 170 cubic feet per minute. The unit incorporates a high-speed venturi-nozzle through which a centrifugal pump (the only moving part) circulates a hurling medium and returns it to a separation chamber. Forced at high velocity across the gap between the nozzle and the venturi, the medium (usually water) entrains air and gases in multi-jet streams producing a continuous vacuum. The mixture of air and water is discharged through the venturi tangentially into the separation chamber causing the water in the chamber to rotate. This results in a centrifugal action that forces the water to the periphery of the chamber, while the lighter air flows to the centre and is discharged. Replacement of the water evaporated from the unit is controlled by a solenoid valve actuated by a float switch. When hot gases or vapours are handled, a temperature limit switch can be supplied which will activate the solenoid valve, enabling cool water to be added to the system, should the water temperature rise above a predetermined level any excess water is drained away. The makers state that the pump was designed for use with materials that cannot be handled by standard oil-sealed or dry mechanical pumps without installing auxiliary apparatus. Kinney Vacuum Division, The New York Air Brake Co., 3529
Page Technical and Industrial Developments
485
Liquid jet pump--ultra-high temperature furnace --electron microscopy plant--cryogenics temperature indicator--stainless steel valves--twostage p u m p - - v a c u u m tooling--miniature coating unit--bell jars--air-cooled diffusion pumps
Commercial News
489
Butterfield sales conference--vacuum melting plant--Nukleardienst G . m . b . H . - - N e m o Heat Treatments Ltd. • Manufacturers and others are invited to submit information for inclusion in this feature, addressed to the Vacuum News Editor, Vacuum, Pergamon Press, 4 & 5 Fitzroy Square, London, W.I. • For further information on any matter mentioned in " Vacuum News ", tear out and post one of the R E A D E R E N Q U I R Y SERVICE CARDS. Readers in the U.S.A. should use the cards addressed to New York ; all other readers are requested to use the cards addressed to London.
Washington St., Boston, Massachusetts, U.S.A.
Ultra-high temperature furnace Alloyd General Corporation have announced the availability of a vacuum furnace, H F 348, providing very high temperatures. The furnace consists of an 18 in. x 24 in. stainless work chamber with vacuum system ; an internal rig for mounting work pieces ; beam scanning controls and instrumentation. The heat source is a self-accelerated electron beam gun which permits accurate heat flux control from ambient to 6000°F, with a heat input uniformity in the order of ~ 1 per cent. The electron beam gun has a minimum beam spot size of 10 mils which is scanned to cover an area up to 3 in. × 3 in. Heat input over the scanned area can be varied from 2 to 300 BTU/sec/ft ~, and a uniform heat input distribution is achieved by synchronized scanning of the beam along two mutually perpendicular axis. The manufacturers state that the system is capable of producing a vacuum of 5 × 10 -8 torr in less than three hours. Typical applications for the new furnace include research, development, and testing under high vacuum and ultra-high temperature. AIIoyd General Corporation, 81 Hicks Avenue, Medford, Massachusetts 02155, U.S.A.
HF 348--No shielding is required permitting an unobstructed view of the test sample 485