LPD Dryers

Energy Efficient Drying

Energy Efficiency

Energy to HEAT material from ambient temperature to target drying temperature is the same for all drying processes.
Energy to DRY material is where the differences occur when comparing a Maguire LPD dryer to all types of Desiccant dryers.
Side-by-side testing of the vacuum dryer and a desiccant dryer shows 70 – 80% reduced energy consumption.

Energy Saver Modes Built in as Standard

Temperature Sense Control: Temperature is controlled efficiently with energy saver modes built in as standard.
Heater and blower are automatically regulated to ensure that only the required amount of heat and air flow are used to bring material up to temperature.

Speed of Drying

LPD dryers use vacuum as the main method to dry versus air desiccant.
Typically, vacuum dryers dry 6 times faster than conventional desiccant dryers.
This dramatically reduces energy used to dry material and translates to more production time.

Low Energy Components

No regeneration process, no added energy used.
Compared to Desiccant dryers, LPD dryers use only one smaller blower and heater sized based on smaller volumes and energy efficiency.
Low maintenance: no scheduled maintenance requirements and no consumables.

Fast ROI

LPD dryers quickly payback in the short term and continue to payback through energy reduction in the long term.
Energy usage – one Desiccant day = one LPD week.
Indirect benefits – increased productivity, reduced start-up scrap rates and reduced energy usage for the same time period.

Patented 3-Step Drying Process

The Maguire LPD Vacuum dryer operates with 3 stainless steel canisters, mounted on a carousel that indexes step by step through the drying process.

Step 1 – Heating Phase

The canister is filled with raw material.
Material is heated from ambient to the required drying temperature.
The time to get the material up to temperature is rapid – typically 20 – 30 minutes for most materials.

Step 2 – Vacuum Drying

The canister indexes from the HEAT stage in (Position 1) to VACUUM stage in (Position 2).
The vacuum canister is sealed and a high vacuum is applied to the hot material, dropping the boiling point of moisture to 133°F / 56°C.
Vacuum is 56″Hg / 700 mmHg, typically for 20 to 30 minutes, depending on the material, initial / target moisture and required throughput.
Vacuum only active usually 1-2 mins per cycle – minimal energy.

Step 3 – Material Feeding

Material is now ready to use in production.
The canister indexes to MATERIAL TAKE OFF (Position 3).
A valve in the canister activates to allow material to feed to the material take off.
Any material left in the canister by the end of the drying cycle time simply rotates back to HEAT stage, (Position 1) and fresh material supplied from the VACUUM stage (Position 2), eliminating any chance of moisture re-absorption or material cooling.

How a Low Energy LPD Dryer works:

Experience Simple Drying

	User-Friendly Control Set drying temperature. Set drying cycle time. Start.
	Simple Operation Fully automatic, 3-step process for energy efficient, fast material drying.
	Drying Parameters Display indicates temperature and elapsed cycle time. View actual vacuum level and temperature in process.
	Drying Control Alarms are shown on the display & signaled by an audible and visual alarm. Controller monitors numerous alarm conditions. VACUUM and HEAT always monitored.
	Quick Material Changes The LPD dryer dries in batches, a material or color change can be made while drying previous materials. Quick canister & surge hopper removal and cleaning. No downtime during clean-out of the surge hopper during material change. No interruption of drying process during on-the-fly material changes.

Option	Model	Description
Clear-Vu Vacuum Receiver	LPD 30, LPD 100, LPD 200	Flapper valve, for high heat applications.
Aluminium Material Conveying Flexible Tube	LPD 30, LPD 100, LPD 200	LPD conveying package.
Dual Convey Kit	LPD 30, LPD 100, LPD 200	To allow connection to 2 machine receivers.
Gravity Dispense Kit	LPD 30, LPD 100, LPD 200	For vertical feeds. Gravity discharge feeds material directly into process machine. For mezzanine / elevated installations.
Membrane Vacuum Purge Kit	LPD 30, LPD 100, LPD 200	Recommended for highly hydroscopic materials.
Spare Canisters	LPD 30, LPD 100, LPD 200	For quick material loading and faster process turn around.
Throat Mount for Canister	LPD 30, LPD 100, LPD 200	For mounting on the throat.
Spare Controller	LPD 30, LPD 100, LPD 200	To allow secondary remote controller to dryer for remote access and control.
Air Filter for High Temperature Applications	LPD 30, LPD 100, LPD 200	High heat option.

Energy Efficient Drying