J-Kem® Scientific, Digital Vacuum Regulator, Model JK-DVR

Description

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

Features:

NO Mercury

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

Model DVR-200

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.

Model DVR-280

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:
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%