DK 6. Specifications DK 20. lighted LCD 2 lines (16x2) (I, UK, F, E, D) Selection of measure: C o F

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2 Specifications DK 6 Display: lighted LCD 2 lines (16x2) Ø 42 mm - 6 holes Selection of language: 5 selectable languages (I, UK, F, E, D) Selection of measure: C o F 1100 W 10 kg Calibration of temperature: Interface: automatic by software Serial RS232 Selectable programs: 20 with 4 ramps for each program Selectable temperatures: Selectable durations: Selection of time: Continuous operation: From room temperature 450 C / F from 001 to 999 minutes 1 minute possible Performances Speed of heating from 20 to 420 C: 30 minutes Stability of heating block temperature: ±0.5 C Homogeneity of temperature in the heating block: ±0.5 C Precision of temperature: ±0.5 C DK 20 Ø 42 mm - 20 holes 2100 W 24 kg Consumptions Against over temperature: Damaged temperature probe: thermostat thermostat by software shown on the display Instruments Volts Hertz DK DK DK Different power supply on request Complementary parts DK 6 DK Test tubes Ø 42x300 mm * * Glassware handle with heat shields Suction cap Support system Upon request accessories DK 6 DK 20 Stainless steel drop collector Stainless steel stand for glassware handle Printer Upon request accessories for COD DK 6 DK 20 COD test tubes Ø 42x200 mm, 200 ml, 29/32 cone * * air refrigerators with ground cone * * PTFE sheats for 29/32 cones * * Antisplash bells * * Stainless steel glassware handle for COD Stand for glassware handle * code number refers to one piece

3 Heating digesters with temperature ramps Instrument nts for wet digestions of liquid or solid samples projected according to GLP Good Laboratory Practices. The range from room temperatu ure to 450 C is able to satisfy all the requireme ents for standard and Kjedahl digestions. The analysed sample is up to 15 ml for liquid or 5 g for solids. The digestion time varies according to the treated material and to the used methods. The Velp digesters allow a work in reproduci ible conditions, with a full safety, saving chemicals, work and space in comparison to the traditional methods. It is possible to remove the evolved fumes using specific accessories without the use of a fume hood. The structure of the digesters is manufactured from stainless steel and is protected by a special resin and paints giving an high resistance to chemicals and mechanical corrosion. The heating block holding the test tubes allows an optimal distribution of heat to all the selected temperatures. Its location within the instrument avoids that in case of liquid spillages these will reach and damage internal parts. The temperature of the heating block is controlled by dedicated electronics with a microprocessor. The temperature probe does not require a calibration which is performed by the electronics at each turning up. This allows a very good precision and repetability of test. It is possible to upgrade the software of new version by using a personal computer for the innovative electronics with microprocessor. It is possible to select up to 20 work programs. For each work program it is possible to select up to four temperatures with the corresponding durations. According to Good Laboratory Practices (GLP) it is possible to send the data related to a performed test to a printer or to a personal computer for their storage. Important In digestions evolving fumes, acid gases and corrosive (eg. Kjeldahl) we suggest the use of Velp systems for sucking and neutralizing them: recirculating water pump type JP (code ), scrubber type SMS (code ) Suitable for 67

4 Specifications DK 6/48 Display: lighted LCD 2 lines (16x2) Ø 48 mm - 6 holes Selection of language: 5 selectable languages (I, UK, F, E, D) Selection of measure: C o F 1100 W 8.2 kg Calibration of temperature: automatic by software Interface: Serial RS232 Selectable programs: 20 with 4 ramps for each program Selectable temperatures: Selectable durations: Selection of time: from room temperature 450 C / F from 001 to 999 minutes 1 minute DK 20/26 Ø 26 mm - 20 holes 1100 W 10 kg Continuous operation: possible Performances Speed of heating from 20 to 420 C: 30 minutes Stability of heating block temperature: ±0.5 C Homogeneity of temperature in the heating block: ±0.5 C Precision of temperature: ±0.5 C Consumptions Against over temperature: Damaged temperature probe: thermostat thermostat by software shown on the display DK 42/26 Ø 26 mm - 42 holes 2100 W 24.5 kg Instruments Volts Hertz DK 6/ DK 6/ DK 20/ DK 20/ DK 42/ Different power supply on request Complementary parts DK 6/48 6 test tubes Ø 48 mm * Glassware handle with heat shield Suction cap Stainless steel stand for glassware handle Upon request accessories DK 6/48 Stainless steel drop collector Printer Complementary parts DK 20/26 20 test tubes Ø 26 mm * Stainless steel glassware handle Complementary parts DK 42/ test tubes, Ø 26 mm * Stainless steel glassware handle, complete of heat shield * code number refers to one single piece

5 Heating digesters with temperature ramps Instruments for wet digestions of liquid or solid samples projected according to GLP Good Laboratory Practices. The range from room temperature to 450 C is able to satisfy all the requirements for standard and Kjeldahl digestions. The analysed sample is up to 15 ml for liquid or 5 g for solids. The digestion time varies according to the treated material and to the used methods. The Velp digesters allow a work in reproducible conditions, with a full safety, saving chemicals, work and space in comparison to the traditional methods. It is possible to remove the evolved fumes using specific accessories without the use of a fume hood. The structure of the digesters is manufactured from stainless steel and is protected by a special resin and paints giving an high resistance to chemicals and mechanical corrosion. The heating block holding the test tubes allows an optimal distribution of heat to all the selected temperatures. Its location within the instrument avoids that in case of liquid spillages these will reach and damage internal parts. The temperature of the heating block is controlled by dedicated electronics with a microprocessor. The temperature probe does not require a calibration which is performed by the electronics at each turning up. This allows a very good precision and repetability of test. It is possible to upgrade the software of new version by using a personal computer for the innovative electronics with microprocessor. It is possible to select up to 20 work programs. For each work program it is possible to select up to four temperatures with the corresponding durations. According to Good Laboratory Practices (GLP) it is possible to send the data related to a performed test to a printer or to a personal computer for their storage. Suitable for 69

6 Specifications Air flow max: Flow regulation: Residual pressure with a water temperature in the tank=15 C: 35 l/min 0 35 l/min 35 mm/hg 160 W 8.5 kg Advantages Automatism and optimization of the sucking power Strongly reduced water consumption in comparison to water jet pumps connected to tap Possibility of avoiding emission into the atmosphere of gaseous pollutants or polluted waters into drainages Independent from tap water contingencies like with low water availability or low pressure Instruments Volts Hertz Recirculating water pump for fumes aspiration Innovative recirculating water pump that allows to select two different time related programs for DK 6 or DK 20 which grant an optimal sucking power related to the phases of digestion and to the number of the samples of the digestor connected to the pump. The use of water jet pumps connected to tap is often impeded by a lack of pressure or by the very high water consumption. Velp s unit is composed by a structure made in ABS, extremely resistant to chemical corrosion, and by a tank where the introduced water is continuously recirculated, determining the saving of water. The type and quality of the used materials make the instrument noiseless with a long useful life, granting a very high air flow capacity, up to 35 l/min. Particular technical shrewdness like the indicator of level for the control of water, the stopcock for the drainage and the comfortable handles for the movement of the equipment, facilitate the operator in the use. When coupled to a Velp Scrubber type SMS (code ), it allows a very effective removal of fumes evolved during acid mineralization. JP JP JP Complete of Viton tube Ø 10x14 mm (m 1.2) TBVI004 TBVI004 70

7 Specifications Epoxy painted inox structure studied and tested in order to give to the instrument an excellent resistance to attacks from chemicals agents Capacious containers for the neutralization solution and for the condensate collection Advantages A highly efficient neutralization, due to the optimized gas-liquid contact Can be used for both basic and acid neutralization The apparatus is safe and practical to use. Disposal of condensates, control and replacement of neutralizing solutions are very simple 3.5 kg Scrubber The SMS unit is designed for the neutralization of toxic, noxious and corrosive fumes coming from oxidative mineralizations or other processes. The system is supplied at a two stage configuration: condensation neutralization The unit has a variety of applications, from the Kjeldahl method to acid or basic gases control and permits the correct disposal of polluting substances, avoiding dangerous emissions to the workplace and to the environment. The unit grants its maximum efficiency if connected to Velp recirculating water vacuum pump (code ). Instrument SMS Upon request accessories (3 stage - adsorption) Pack of 10 refill of activated carbon Filter for activated carbon

8 UDK 126D specifications Epoxy painted stainless steel structure studied and tested in order to give to the instrument an excellent resistance to the attack of chemical and mechanical agents and to corrosion in general Short distillation time Alkali addition, when required, in closed system No transfer of samples Compact unit Conical joint for holding different size distillation tubes, both in diameter and length Reproducibility: ±1% 2100 W 23 kg About Kjeldahl Steam distillation is applied in laboratories for the fractionation of water insoluble liquids or solids according to Dalton s law of partial pressures in a gas mixture. It is also used for the stripping of chemicals from mixtures or solutions after displacement of ionic equilibria by adding acids or bases, as in the well known Kjeldahl s method for total Nitrogen determination. The method takes its name from the Danish chemist that conceived it more than a century ago. The Kjeldahl method is still the most used for determining Nitrogen and protein contents in foods and feeds (official methods). This is simply due to its precision and reproducibility. From its first setting-up many improvements were introduced aimed at reducing energy consumption, space requirement and sample weight. Instruments Volts Hertz UDK 126D UDK 126D Different power supply on request VTBE ACPZ001 Complete of accessories Test tube Ø 42x300 mm Collecting flask 250 ml VTBE001 Set of tubes Pincer for test tubes Inlet tube ACPZ001 ACTC001 Upon request accessories Test tube Ø 80x300 mm for alcohol determination Adapter for test tube H 260 mm Adapter for test tube Ø 26 mm MEDI013 ACBO021 ACTC MEDI013 ACB