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Torvac and boc ltd—new agreement
Vacuum
News
homogeneous and sandwich
viscous spreads.
foods
such
as fruit
juices,
jellies,
in processing undertaken eliminated. continuous processing
treacles
Cone shaped and built of stainless steel, this 1.5 m high unit is designed for wall-mounting. It is self-contained in that it can be linked directly to the pumping and pipework system of a production line, and is fitted with high-pressure built-in spray nozzles for efficient cleaning-in-place. In operation, a food product is fed continuously through a distributor pipe into the vacuum chamber, sprayed on to the underside of the rotating cone and, through centrifugal force, spread in a very thin layer over the cone’s surface. Dissolved air is drawn off by a vacuum pump, and the vapour from the deaerated product passes through a water-cooled condenser. The deaerated product is collected at the bottom of the vacuum chamber and can be removed continuously for further processing by use of a positive displacement pump. Throughput depends on plant capacity and viscosity of product, but is variable up to 2000 1 h-r. The Centri-Vat operates in temperature ranges of 40-50X Maximum deaeration is obtained pre-heating the product to 50-55X Performance non-rotating
is consistently higher than that normally obtained with deaerating vessels. The Centri-Vat is markedly gentle
Commercial Torvac
by
and BOC
Ltd-new
agreement
instrument
gives
extra
facilities
Edwards High Vacuum has designed and supplied a unique vacuum instrument for the MRC Cyclotron Unit at Hammersmith Hospital. The instrument, the 21 -way Monitorr, providesvacuum measurement and control at 21 different points in the Cyclotron vacuum system, provides an alternative to the use of 22 separate instruments and in a single chassis (saving about 80% of the panel space otherwise required), provides a number of special facilities, including the possibility of controlling the entire Cyclotron vacuum system by computer. Edwards designed the instrument as part of a larger contract involving the supply of pumps, valves and other equipment in connection with an MRC modernization programme involving the building of three additional beam lines on their 16 MeV Cyclotron. The Cyclotron now has six beam isotope manufacture by irradiation as well as fast neutron production treatment of cancer patients.
lines which provide facilities for of gas, liquid and powder targets, for radiobiological research and
Monitoring and control of the vacuum system in all parts of the unit is extremely complex, and using conventional equipment would have required 11 each of the Monitor 101 and the Controller 1. 42
Bus-Wrap
is high-voltage
insulation
A high-voltage insulation for switch-gear bus and connection is announced by Sola Basic International. Bishop No. 5000 Bus-Wrap, a laminate of EPR high-voltage tape and a mastic with superior adhesion, will instantly adhere and conform to all bus bar and bus connection geometries. Available in roll form, 4 in. x 0.155 in. x 10 ft. No. 5000 Bus-Wrap is an insulation of high dielectric strength which resists high humidity, salt spray, chemicals and fungi. It is compatible with extruded dielectric cable insulation and is easily applied in a one-pass application. Sola Basic International, 111 East Wisconsin Avenue, Milwaukee, WI, USA
news
Torvac Ltd and EOC Ltd announce that they have entered into an agreement whereby Torvac takes over from BOC interests in electron beam welders, and BOC takes a minority shareholding in Torvac Ltd, the Torvac group company manufacturing electron beam welders and vacuum furnaces. Torvac will continue with the existing range of machines, adding improvements, as has been the policy in the past. An addition to the range will be the BOC Rotary Transfer electron beam welder, designed for very high output rates. Torvac Ltd. Histon, Cambridge, England
Edwards vacuum in reduced space
viscous food products, cleaning-in-place can be in about 15 min. and foaming at filling stage is The process also opens up the opportunity for deaeration in large volume for continuous food plants. Alfa-Lava1 Co Ltd. Gt West Road, Brentford, Middlesex, England
The Edwards 21 -way Monitorr accepts 21 gauge heads, with individuaffy pre-settable relays for every head. Power supply to each head is controllable either manually by on/off switches on the panel front, or automatically through a relay which can be energized externally. Indicator lamps are provided to show the condition of each head. The instrument has also been provided with a special 600 mV recorder output for each head, to allow for computer monitoring. A single pressure
meter is fitted together with a selector at any gauge head position to be read
switch at will.
enabling
the
The complete instrument is housed in a standard unit, 482 mm wide by 133 mm high, conforming to the international Post Office Rack standard to which aft Edwards Series 70 instruments are designed. Edwards High Vacuum, Manor Royal, Crawley, West Sussex, England
Diffstaks
in beam line installations
Diffstak integrated diffusion pumps installed nearly 5 yr ago on the SRC 3 million V particle accelerator at Sussex University, have saved in running costs while reliably maintaining a high performance. Also, the simplicity of the Diffstaks has saved space and improved accessibility for routine maintenance. The University’s with a number supplementing
3 million
V accelerator
is a Van de Graaf
of beam lines used mainly a smaller
(306
kV)
machine
machine
for atomic collision studies, installed
previously.
Vacuum on the smaller machine is maintained by conventional diffusion pumps with associated baffles, valves, and nitrogen the latter being essential to prevent backstreaming.
traps,
A similar pumping system on the new accelerator, for which a vacuum of 10 -.s ton was specified, would have required use of about 300 I day-t .of liquid nitrogen and associated capital expenditure on Dewars, piping and traps, and staffing and logistics requirements associated with the need periodically to refill Dewars from a central nitrogen store.
News
homogeneous and sandwich
viscous spreads.
foods
such
as fruit
juices,
jellies,
in processing undertaken eliminated. continuous processing
treacles
Cone shaped and built of stainless steel, this 1.5 m high unit is designed for wall-mounting. It is self-contained in that it can be linked directly to the pumping and pipework system of a production line, and is fitted with high-pressure built-in spray nozzles for efficient cleaning-in-place. In operation, a food product is fed continuously through a distributor pipe into the vacuum chamber, sprayed on to the underside of the rotating cone and, through centrifugal force, spread in a very thin layer over the cone’s surface. Dissolved air is drawn off by a vacuum pump, and the vapour from the deaerated product passes through a water-cooled condenser. The deaerated product is collected at the bottom of the vacuum chamber and can be removed continuously for further processing by use of a positive displacement pump. Throughput depends on plant capacity and viscosity of product, but is variable up to 2000 1 h-r. The Centri-Vat operates in temperature ranges of 40-50X Maximum deaeration is obtained pre-heating the product to 50-55X Performance non-rotating
is consistently higher than that normally obtained with deaerating vessels. The Centri-Vat is markedly gentle
Commercial Torvac
by
and BOC
Ltd-new
agreement
instrument
gives
extra
facilities
Edwards High Vacuum has designed and supplied a unique vacuum instrument for the MRC Cyclotron Unit at Hammersmith Hospital. The instrument, the 21 -way Monitorr, providesvacuum measurement and control at 21 different points in the Cyclotron vacuum system, provides an alternative to the use of 22 separate instruments and in a single chassis (saving about 80% of the panel space otherwise required), provides a number of special facilities, including the possibility of controlling the entire Cyclotron vacuum system by computer. Edwards designed the instrument as part of a larger contract involving the supply of pumps, valves and other equipment in connection with an MRC modernization programme involving the building of three additional beam lines on their 16 MeV Cyclotron. The Cyclotron now has six beam isotope manufacture by irradiation as well as fast neutron production treatment of cancer patients.
lines which provide facilities for of gas, liquid and powder targets, for radiobiological research and
Monitoring and control of the vacuum system in all parts of the unit is extremely complex, and using conventional equipment would have required 11 each of the Monitor 101 and the Controller 1. 42
Bus-Wrap
is high-voltage
insulation
A high-voltage insulation for switch-gear bus and connection is announced by Sola Basic International. Bishop No. 5000 Bus-Wrap, a laminate of EPR high-voltage tape and a mastic with superior adhesion, will instantly adhere and conform to all bus bar and bus connection geometries. Available in roll form, 4 in. x 0.155 in. x 10 ft. No. 5000 Bus-Wrap is an insulation of high dielectric strength which resists high humidity, salt spray, chemicals and fungi. It is compatible with extruded dielectric cable insulation and is easily applied in a one-pass application. Sola Basic International, 111 East Wisconsin Avenue, Milwaukee, WI, USA
news
Torvac Ltd and EOC Ltd announce that they have entered into an agreement whereby Torvac takes over from BOC interests in electron beam welders, and BOC takes a minority shareholding in Torvac Ltd, the Torvac group company manufacturing electron beam welders and vacuum furnaces. Torvac will continue with the existing range of machines, adding improvements, as has been the policy in the past. An addition to the range will be the BOC Rotary Transfer electron beam welder, designed for very high output rates. Torvac Ltd. Histon, Cambridge, England
Edwards vacuum in reduced space
viscous food products, cleaning-in-place can be in about 15 min. and foaming at filling stage is The process also opens up the opportunity for deaeration in large volume for continuous food plants. Alfa-Lava1 Co Ltd. Gt West Road, Brentford, Middlesex, England
The Edwards 21 -way Monitorr accepts 21 gauge heads, with individuaffy pre-settable relays for every head. Power supply to each head is controllable either manually by on/off switches on the panel front, or automatically through a relay which can be energized externally. Indicator lamps are provided to show the condition of each head. The instrument has also been provided with a special 600 mV recorder output for each head, to allow for computer monitoring. A single pressure
meter is fitted together with a selector at any gauge head position to be read
switch at will.
enabling
the
The complete instrument is housed in a standard unit, 482 mm wide by 133 mm high, conforming to the international Post Office Rack standard to which aft Edwards Series 70 instruments are designed. Edwards High Vacuum, Manor Royal, Crawley, West Sussex, England
Diffstaks
in beam line installations
Diffstak integrated diffusion pumps installed nearly 5 yr ago on the SRC 3 million V particle accelerator at Sussex University, have saved in running costs while reliably maintaining a high performance. Also, the simplicity of the Diffstaks has saved space and improved accessibility for routine maintenance. The University’s with a number supplementing
3 million
V accelerator
is a Van de Graaf
of beam lines used mainly a smaller
(306
kV)
machine
machine
for atomic collision studies, installed
previously.
Vacuum on the smaller machine is maintained by conventional diffusion pumps with associated baffles, valves, and nitrogen the latter being essential to prevent backstreaming.
traps,
A similar pumping system on the new accelerator, for which a vacuum of 10 -.s ton was specified, would have required use of about 300 I day-t .of liquid nitrogen and associated capital expenditure on Dewars, piping and traps, and staffing and logistics requirements associated with the need periodically to refill Dewars from a central nitrogen store.