N-EVAP

Analytical Nitrogen Evaporators for Sample Concentration

  

N-EVAP Catalog No. 11250-RT

N-EVAP Catalog No. 11250-G

N-EVAP Catalog No. 11155-RT

Features
  • Three models available in 12, 24 and 36 positions.
  • Compact size takes minimal hood space.
  • Water bath provides gentle heat.
  • Circular stand turns so each sample is accessible from the front.
  • The larger models have a band spring hoist assembly for easy raising or lowering into the bath. Accommodates samples in test tubes 10 to 29 mm diameter. Volumes from 1 ml to 50 ml.
  • A gas flow meter with valve, controls and indicates gas consumption.
  • A needle valve adjusts gas flow at each position.
  • Stainless steel 4 inch x 19-gauge needles standard.
  • All metal parts are made of stainless steel, nickel chromed brass or anodized aluminum. Plastic parts are laboratory grade and will withstand contact with common organic solvents.

System Specifications
No. of Samples 12 24 36
Instr. Cat. No. 11155 11250 11550
Bench space
(w x d x h)		 13x11x31 in
(33x30x80 cm)		 16x15x33 in
(40x38x84 cm)		 23x22x33 in
(58x56x84 cm)
Test tube size range 5 to 29 mm 10 to 29 mm 10 to 29 mm
Gas flow meter range O to 5 lpm O to 10 lpm O to 15 lpm

Bath specifications:
Inside Dia.
(I.D. x depth) 		8.5x4.5 in
(21.6x11.4 cm) 		12x4.5 in
(30.5x11.4 cm) 		18x4.5 in
(45.7x11.4 cm)
Outside Dim.
(O.D. x height)		 13x11x7 in
(33x28x18 cm) 		18x16x7 in
(46x41x18cm) 		23x21x7 in
(58x53x18 cm)
Total watts 500 W 800 W 1200W
Voltage 120 or 240 V
Hertz 50 or 60 Hz
Water bath temperature range 30° to 70° C
Accuracy ±2°C
Dry bath
temperature range		 30° to 130° C
Accuracy ±5°C
The instrument consists of a base and stand assembly, sample holder and gas distribution system. Test tubes are held in place by a spring-loaded sample holder and support tray. Each position is numbered. The gas at 5 to 10 psig passes through an adjustable flow meter to the distribution manifold. Flexible tubing leads to valve-tube assemblies at each position. Depending on the test-tube size and solvent volume they can be individually raised or lowered to the correct height. Needles or glass pipets blow gas onto the surface of the solution resulting in rapid evaporation of the solvent. All materials used are laboratory quality and can withstand contact with organic solvents.Acid resistant models are available for corrosive applications.
The round, stainless steel water bath is thermostatically controlled and will accurately maintain water temperature from 30° to 70° C. Optional dry baths filled with glass or aluminum beads will operate from 30° to 130° C. A high temperature limit switch is installed for safety. An electrical GFCI plug is optional. An intrinsically safe, purged case is also available as an option. The bath is UV/CUL approved for laboratory use.

Options: Suffix:
· Pasteur pipet fittings replace Luer fittings & needles (-P)
· Acid resistant coating for corrosive environments (-R)
· Dry baths with glass or aluminum beads for water-free applications or high temperatures to 130° C (-G, -A)
· Phthalate free tubing replaces silicone tubing (-H)
· Intrinsically safe, purged bath case (-Z)
· 240 volt electrical wiring and plug (-2)

Please add the appropriate suffix to the catalog number when ordering