Loading... Please wait...

Our Newsletter


Greco Bros Vapor Degreasers (VDG)

FREE TECHNICAL SUPPORT ON ANY CLEANING APPLICATION !!!

 

Open Frame Degreasers are designed and built to provide efficient, reliable service when using chorinated solvents or N-propyl bromide based solvents. Generally, these solvents are used in applications that require the removal of heavy grease, oils, or compounds. These solvent vapor degreasers meet recent EPA and NESHAP guidelines for use with trichloroethylene and perchloroethylene. Although they may also be used with fluorinated solvents, we suggest that you investigate our High Performance Degreasing Equipment for those applications.

 

  

High Performance Degreasers are the latest development in open top degreaser design. These solvent vapor degreasers were specifically designed for use with the new generation of environmentally-friendly fluorinated solvents (HFE, HFC, and HCFC). These solvents are most often used for precision cleaning of electronic, optical, and medical components. This new line of vapor degreasers includes innovative features, like sealing covers, automated shut-down cycles, secondary containment, and early malfunction detection: all designed to make operating with the new solvents cost-effective and trouble-free.

How Vapor Degreasers Work

Solvent Degreasing involves the exposure of a work piece to pure solvent vapors released by boiling solvent.

The work piece is usually suspended in the vapors just above the boiling solvent.  When the warm vapors touch the comparatively cool work piece, a condensing action occurs which dissolves the contamination and flushes it away as it runs off the part. 

This cleaning action will continue until the work piece and the solvent vapor are the same temperature.  Beyond this basic procedure a number of additional cleaning operations are often used, including immersion rinsing and ultrasonic cleaning.

The degreaser styles are designed for use with n-propyl bromide and chlorinated solvents, including trichloroethylene, methylene chloride. and perchloroethylene.

Although, our systems can also be used with Fluorinated fluids like HFE, HFC and their azeotropes, Greco Brothers suggests that you request literature depicting our more sophisticated line of High Performance Degreasers degreasing equipment for those solvents.

 


 

vdg-diagram-of-operation.jpg

 

Why are High-Performance Degreasers so efficient?

All High-Performance Degreasers are designed with the following special features which drastically reduce vapor emissions and the potential for fluid losses:


Drop-Seal Cover: Much emphasis is generally placed on efficiency of operation, but a significant portion of the solvent losses take place when the machine is not being operated. The manner in which the top opening of a degreaser is sealed will greatly affect the downtime losses. Hinged covers seal well, but tend to create a vacuum as they are opened; dragging vapors out of the machine. Sliding covers open without disturbing the vapor zone, but generally do not seal well around the edges when they are closed. Greco Brothers has developed and patented a cover which will roll into position without disturbing the vapor zone, and then drop into place; sealing the work area from the atmosphere. This system has the sealing advantages of the hinged cover, but causes no dragout when it is opened.


Welded Plumbing: Tests have shown that, regardless of the joint compound used, fluorinated solvent vapors have a tendency of seeping through even the tightest threaded fitting joints. As a result of these tests, and to eliminate the possibility of threaded joints loosening over time, all High-Performance Degreasers are designed with welded stainless steel plumbing. Where maintenance requirements dictate that a removable connection be made, only metal-to-metal compression fittings are used

 

open-frame-solvent-vdg.pngShut-Down Cooling Cycle: Upon Depressing the Power Off switch, a computer-controlled shut-down cycle will automatically be activated. During the shut-down cycle, the refrigerant in the primary cooling system is diverted from the primary cooling coil to cooling coils which are located within the liquid in the wash and rinse sum  This feature is designed to cool the fluid in both compartments, causing an immediate reduction in vaporization of the solvent. The secondary refrigeration system continues to operate in its normal manner during the shut-down cycle, keeping the freeboard area cool. The computerized control system monitors the temperature in the sumps, and continues to operate the shut-down cooling cycle until the fluid has dropped to the desired temperature.

Malfunction Reporting: Early and accurate detection of machine malfunctions are crucial in preventing long-term solvent losses. Software developed by Greco Brothers for the computerized central control unit, performs continuous diagnostic sensing and reporting of the functions which are crucial to the machine's efficient operation. 

Heating/Cooling System: Rather than incorporating a heat-pump combination for heating and cooling, High-Performance Degreasers maintain separate heating and cooling systems. By utilizing separate systems for heating and cooling, these systems produce much higher turnover rates than those associated with heat-pump systems. Higher turnover rates translate into cleaner rinse compartments and fewer rejected parts. In most applications, it also eliminates the need for a second rinse compartment, reducing the surface area of the vapor zone by one third. The smaller the surface area of the vapor zone, the lower the vapor losses. Additionally, this heating system offers versatility to change cleaning solutions at some point in the future.

 AMS - Open Frame vapor degreasers

AMS - Greco Brothers Advantage - Degreasers

AMS - UVD-2820 CUSTOM



AMS - HP Degreasers