High Standards

Fast Vacuum Drying Cycles Save Time and Money

Compared to other drying methods in use today, the Littleford Ploughshare Vacuum Dryer is several times faster (and more efficient), thus greatly reducing man-hours, energy requirements, and associated costs, while increasing productivity. Under most circumstances, a Littleford Ploughshare Vacuum Dryer is at least two to three times faster than a ribbon or paddle dryer. Compared to a tumble dryer, it is six to ten times faster. It is many times faster than tray drying – and without the mess.

Environmentally Clean/Safe/Controlled Drying

Since a properly equipped Littleford Ploughshare Vacuum Dryer is a totally enclosed cylindrical vessel, there is no chance of toxic gases or solvent vapors escaping to the atmosphere and contaminating the workplace. Moreover, a properly sealed Littleford Ploughshare Vacuum Dryer, full evacuated, refilled with inert gas, and reevacuated to full vacuum, will prevent oxidation of products, even at elevated working temperatures. Unlike other dryers, the Littleford Ploughshare Vacuum Dryer does not required physical contact with the material – critical when drying toxic materials. The Littleford Ploughshare Vacuum Dryer equipped with rupture disc and explosive venting greatly reduces the hazard associated with drying under explosive conditions.

Optimum Operation At High Temperatures/Pressure

A Littleford Ploughshare Dryer can operate safely at temperatures up to 450°F. Units are available for even higher operating temperatures, depending upon the specific application. Littleford Ploughshare Vacuum Dryers are structurally designed and constructed to operate at full vacuum. Littleford Day designs and manufactures vessels that operate under both pressure and vacuum conditions.

ASME code constructed heat transfer jackets on Littleford Ploughshare Dryers are normally designed to operate at 75 p.s.i.g. pressure rating. Higher pressure jackets are available. A standard 75 p.s.i.g. jacket allows the use of steam at a maximum temperature of 320°F, or recirculating water or hot oil temperatures above or below the capabilities of steam.

Optional Solvent Recovery Systems

Littleford Day provides sophisticated Solvent Recovery Systems to match their dryers. These systems include a heat exchanger, recovery tank, vacuum pump, and all of the associated controls, accessories, and hardware.

Littleford Day Specifically Designed Seals

For many drying applications, conventional packing type seals are adequate. However, all Littleford Ploughshare Dryers can be equipped with either special nitrogen purge seals or with double-face mechanical seals on the main shaft and chopper shafts. Seal integrity is an integral part of Littleford Ploughshare Dryer performance.