Welch 2027 Self-Cleaning Dry Vacuum System

SELF-CLEANING DRY VACUUM SYSTEMS™ FOR ROTARY EVAPORATORS

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Self-Cleaning Dry Vacuum System are complete vacuum solutions for rotary evaporation. All three systems (2025, 2027, 2028) feature rugged corrosion resistant PTFE diaphragm pumps for low maintenance and long life. All models feature adjustable vacuum to optimise for a variety of solvents. Also included with all models: digital or analog vacuum read-out, inlet and outlet traps to protect the pump and exhaust line from liquids, gas ballast or no bumping/foaming key as an emergency “bump stop”, and automatic self-cleaning purge at shutdown.

The self-cleaning feature and patent pending vacuum control technology contribute to the pumps’ long diaphragm life.

• Anti-bumping/foaming feature with controlled evaporation rate
• Rugged corrosion resistant PTFE construction
• Self-cleaning for long life
• 2 Torr (2.7 mbar) models strip DMF at 35°C bath temperature
• 9 Torr models (12 mbar) models strip most common solvents
• Programmable Model 2028 features walk away automation

SPECIFICATIONS
Free Air Displacement: 32 L/min
Ultimate Pressure: 2 Torr
Gas Ballast: Yes
Pump Mechanism: Diaphragm
Maximum Vacuum,in,Hg 29.85
Tubing Needed, I.D.: 7mm
Intake Thread: 3/8″
Exhaust Thread: 3/8″
Weight: 13.6kg
Dimensions: 42.2 x 30.5 x 28

Ordering Information:
202701 Wired for 115V, 60Hz, 1 PH with N. American 115V Plug
202701A Wired for 230V, 60 Hz, 1 PH with N. American 230V Plug
202703 Wired for 230V, 50Hz, 1 PH with Cont. Euro. (Schuko) Plug
202705 Wired for 100V, 50/60Hz, for Japan

2027-spec-sheet-2008

2025-2028-manual-20080

2027-expl-view-and-parts-list

Weight 17 kg
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