An ideal instrument for laboratory vacuum regulation.
Connect the regulator to any vacuum pump or vacuum source and then to any piece of equipment to regulate pressure in most cases to ± 1 torr.
A pressure ramp feature evacuates equipment at a user defined rate to eliminate bumping due to solvent degassing or over-evacuation.
The vacuum regulator is ideally suited for large volume distillations, rotary evaporators and vacuum chambers.
Recover > 99% of solvent from rotary evaporators
100% digital pressure entry and control
Wetted parts are 100% stainless steel and Teflon
Vacuum ramping feature eliminates bumping
USB port and free software for PC control
Resists: All organic solvents Acids Bases Water
Not recommended for small volume distillations or applications which involve a continuous purge with gas, these applications are better performed by J-KEM’s Precision Vacuum Regulator, Model DVR-1000.
Two Styles of Regulators to Choose From
Designed for continuous vacuum sources, such as oil-filled vacuum pumps, aspirators, or systems that are “always on”, like in-house vacuum systems. The DVR-200 regulates pressure by opening and closing a valve that separates the vacuum source from the system being evacuated. In most cases, the DVR-200 is the best choice.
Designed for use with diaphragm vacuum pumps that regulate pressure by turning the pump On and Off. The DVR-280 doubles the life of diaphragm pumps by starting the pump at atmospheric pressure before connecting it to the vacuum system.
Specifications: 120 & 230 Vac @ 100 watts. Vacuum fittings: 1/8” NPTM. Dimentions: 3.4″ x 5.4″ x 7.4″ (H x W x D) Warranty: Electronics: 2 yr; transducer and vacuum valve: 6 mo., but void if damaged by chemical buildup. Recover > 99% of solvent from rotary evaporators Solvent DVR Pressure (mm Hg) Solvent Volume Time to Dryness Percent Recovery Ether 475 torr 340 mL 14.6 min 99.6% CH2Cl2 300 torr 360 mL 21.9 min 99.8% CH2Cl2 100 torr 255 mL 5.9 min 99.5% EtOAc 90 torr 316 mL 17.0 min 99.9% Toluene 50 torr 273 mL 15.7 min 99.4%