24 Position N-EVAP
Nitrogen Evaporator
DESCRIPTION
The 24 position N-EVAP is our most adaptable benchtop evaporator. The basic model offers all of the standard features from our N-EVAP line. Additionally, the 24 position N-EVAP offers the most customizable options for your sample preparation needs. The standard sample holder can accommodate samples with an outside diameter of 10-30 mm. However, with the optional 8 position large sample holder, vials with an outside diameter of 30-70 mm can be processed. The 24 position N-EVAP test tube evaporator can also be upgraded to include digital controls for heat and time with the addition of the side control box (Option code -CB).
These economical units provide controlled concentration of sample vials through the application of nitrogen gas within a heated water bath. The dual band spring hoist assembly provides a simple and effective means of removing samples from the heated water bath. The N-EVAP’s circular rotating design permits each sample to be accessible from the front of the instrument for easy insertion and retrieval. The chrome plated needle valves are individually milled from solid brass, enabling precise, uniform adjustments for your nitrogen blow down. This promotes efficient and safe sample reduction with minimal nitrogen waste. Time tested technology and proven construction ensure a long lasting, user-friendly experience.
Gentle
N-EVAP nitrogen evaporators combine nitrogen blow down with a heated bath to gently concentrate delicate samples
Flexible
An adjustable sample holder design fits a wide variety of sample tubes and vials at once
Customizable
A large sample holder option can be added to accommodate vials with a larger outside diameter up to 70 mm
Individualized Control
Optimize evaporation of diverse samples with individual gas flow control at each vial
STANDARD FEATURES
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Nitrogen filter
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Adjustable flow meter, 0-20 lpm
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High pressure phthalate free tubing for safety
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High temperature limit switch for safety
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Dual band spring hoist assembly (except in dry bath model)
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Precision needle valve tube assembly
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Needles, 4 inch x 19 gauge with chrome plated brass hub and stainless steel shaft
OPTIONS (Add to main Cat# when purchasing)
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220v wiring harness (Option Code# -2), Cat# 11250-2
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Z-Purge/positive pressure purge case (Option Code# -Z), Cat# 11250-Z
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Acid resistant coating on instrument and needles (Option Code# -RT), Cat# 11250-RT
- Side control box with built-in digital controller, timer, and pressure regulator (Option Code -CB), Cat# 11250-CB
SPECS
| Instrumental Name | 24 Position N-EVAP | 24 Position N-EVAP | 24 Position N-EVAP |
| Bath Type | Water | Dry | None |
| Instrumental Catalog Number | 11250 | 11250-DA | 11250-O |
| Number of Sample Positions | 24 | 24 | 1224 |
| Overall Dimension (w x d x h) | 16 x 15 x 33 in 41 x 38 x 84 cm |
16 x 15 x 27.5 in 41 x 38 x 70 cm |
16 x 15 x 31.75 in 41 x 38 x 81 cm |
| Sample Holder Layout | Circular | Circular | Circular |
| Gas Manifold Layout | Single Ring | Single Ring | Single Ring |
| Test Tube Range (Standard Sample Holder) | 10-30mm OD | 10-30mm OD | 10-30mm OD |
| Test Tube Range (Optional Sample Holder) | 30-70 mm OD | 30-70 mm OD | 30-70 mm OD |
| Gas Flow Meter | 0-20 L/min | 0-20 L/min | 0-20 L/min |
| Stainless Steel Needles (Length & Gauge) | 4.0 in x 19 ga 102 mm x 19 ga |
4.0 in x 19 ga 102 mm x 19 ga |
4.0 in x 19 ga 102 mm x 19 ga |
| Sample Tray Lift Mechanism | Dual Band Spring Hoist Assembly | None/Fixed | Dual Band Spring Hoist Assembly |
| Rotating, Leak Tight Gas Fitting | Standard | N/A | Standard |
| Standard Gas Input Range | 20-30 psig | 20-30 psig | 20-30 psig |
| Gas Input Range with Optional Pressure Reducing Regulator | 30-160 psig | 30-160 psig | 30-160 psig |
| Acid Resistant Coating | Optional | Optional | Optional |
| Heating Device Specs | |||
| Model Number |
9125 | 5125 |
N/A |
| Heating Medium | Water | Aluminum Beads (Glass Beads in -RT Models) | None |
| Inside Dimensions (Diameter x Depth) | 12.0 x 4.5 in 30.5 x 11.4 cm |
12.0 x 4.5 in 30.5 x 11.4 cm |
N/A |
| Outside Dimensions (w x d x h) | 16 x 15 x 7 in 41 x 38 x18 cm |
16 x 15 x 7 in 41 x 38 x18 cm |
N/A |
| Total Wattage | 900 W | 540 W | N/A |
| Bath Temperature Range | 30-90 °C | 40-130 °C | N/A |
| Temperature Controller Type |
Mechanical Thermostat | Mechanical Thermostat | N/A |
| Controller Accuracy | +/- 2 °C | +/- 2 °C | N/A |
MODELS
| Catalog Number | 24 Position N-EVAP |
| 11250 | Water |
| 11250-NT | No Teflon, Water Bath* |
| 11250-DA | Dry Bath |
| 11250-O | No Bath** |
* No Teflon (-NT) units designed for PFAS analysis using EPA methods 533, 537 and 537.1.
**All “-O” models come with a base and stand assembly instead of a heated bath. These instruments are designed for evaporation procedures performed at ambient temperature.
RESOURCES
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N-EVAP Instruction Manual (Catalog #s 11106, 11155, 11250) for Water Bath Models - Version 22.5
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N-EVAP Instruction Manual (Catalog #s 11155, 11250) for Dry Bath Models - Version 22.5
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N-EVAP Instruction Manual (Catalog #s 11106, 11155, 11250) for No Bath Models - Version 20.5
- 24 Position N-EVAP Brochure and Specifications
ACCESSORIES
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Large vessel sample holder, 8 positions, for vial outside diameters of 30-70 mm (cat# NA1228)
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Nitrogen generator (cat# NA1955)
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Pasteur pipette adapters (cat# NA0636)
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Pressure reducing regulator 0-160 psi (cat# NA0630)
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High temperature silicone fluid (cat# NA1240)
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Various needle sizes and gauges
REPLACEMENT PARTS
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P0627: Valve Tube Assembly – Post 1997
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P0607: Luer & washer for N-EVAP valve tube
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P0634: Tube Fitting nylon 3 part for N-EVAP valve tube