Products » Dryers » VBD-1000


The Maguire VBD-1000:
Dry Up to 1000 lb./hr in 1/6 the Time with Half the Energy

That's right... Maguire Vacuum Dryers are proven to dry all types of polymers in a fraction of the time and with 50% less energy than desiccant dryers.

..and leave it to Maguire to improve on a great thing:

  • Improved design obsoletes moving canisters and minimizes moving parts.
  • Continuous batch drying process.
  • -40 dew point air is constantly bled into vacuum and retention hoppers.
  • Vertical design minimizes footprint.
  • No heat loss is guaranteed with 4" double-insulation on all vessels.
  • Reduced Maintenance - no desiccant to change - no filters to clean.
  • Faster drying improves production planning.
  • "No stress" material drying - means no material degradation.
  • Process temperatures up to 350F. (175C)
  • Vacuum take-off or gravity feed material discharge available.
  • Backed by same 5-year warranty as all Maguire products.







Low Pressure Dryer


Tel: 610-459-4300
Fax: 610-459-2700

VBD-1000 installed on mezzanine

How the VBD-1000 Dryer Works:

VBD Vacuum Dryers utilize a 3-stage continuous batch drying process

Stage 1:

Material in the heating hopper is brought to set point by means of a centrifugal blower through a 40 Kw heating element. The requested heating temperature is adjusted on the control panel and the cycle lasts 45 minutes (60 minutes for PET).

Stage 2:

Upon reaching the desired set point, heated material is discharged from the heating hopper into the vacuum vessel. The vacuum is brought to 75mm Hg absolute pressure and held to a 20mm Hg differential for the set cycle time. The vacuum cycle typically lasts for about 20 minutes so you have ready-to-process material in 65 - 80 minutes.

Stage 3:

The dried material is discharged into an insulated retention / take-off hopper for consumption. A positive pressure heated dry air purge is maintained on the material.

VBD Controller

Simple is better - no confusing icons - only two screens to monitor

The controller is a Motorola micro-processor

  • Four buttons provide access for setting operation mode, adjusting dryer parameters and many additional program functions.
  • Alarms are shown on the display and signaled by an alarm light and horn with silence function.
  • Reports can be generated via a USB port to either a memory stick or printer.
  • Program updates via flash memory using a standard USB memory device.

Vacuum Generator:
Maintains vacuum at 70mm
Hg 20mm Hg to ensure
that moisture is drawn out
of the polymer. (Location
back side of the enclosure).

Dry Air Membrane:
Provides dry air
purge for vacuum
vessel and dry
air blanket of the
retention hopper.

Heating Hopper: Insulated
stainless steel hopper for
drying temperatures up to
350F (175C).

Alarm Light

Variable Frequency Drive:
Used to optimize
blower speed.

Insulated Vacuum Vessel
with cleanout port.

10 Hp. High Efficiency
Centrifugal Blower.

Insulated Retention Hopper for
dried material.

Coalescing Filters:
Removes moisture from
compressed air supply

Mezzanine mount is
standard. (Optional
floor-mount sub-frame
assembly is shown with
2 fork lift pockets)
Energy usage comparison with dual-desiccant bed dryer
Dual Bed Dryer vs. Maguire VBD-1000 Vacuum Dryer

Drying 1000 lb/hr (454 kg/hour) of nylon at 170F ( 77C):
- Electrical consumption only
- Compressed air generation electrical requirement for 9.8 SCFM
TOTAL True Energy Consumption @ 170F (77C)
Dual Bed

Drying 1000 lb/hr (454 kg/hour) of Polycarbonate at 250F ( 121C):
Dual Bed VBD
Total True Energy Consumption @ 250F (121C) 120.3 53.4
Note: "compressed air generation electrical requirement" is the amount
of electrical energy required to make the amount of compressed air that
the unit consumes. It is based on 4 SCFM requiring 1.0 HP, and 1.0 HP
being 746 watts of power.
Model VBD-1000
U.S. Metric
Maximum Throughput up to 1000 lb./hr. up to 455 Kg
Heating Hopper Volume 1200 lb. (26 ft3) 544 Kg (735 L)
Vacuum Vessel Volume 400 lb. (10.5 ft3) 180 Kg (297 L)
Retention Hopper Volume 400 lb. (10.5 ft3) 180 Kg (297 L)
Max. Temperature 370F 185C
Power Supply 480V/3ph/60Hz
100 A Service
100 A Service
Process Heater 40 KW 40 KW
Blower 10 HP, 600 scfm 7.5 KW, 16990 L/min
Compressed Air Pressure 80 psi 5.5 bar
Compressed Air Usage 168 ft3/hr. 4757 L/hr
Product Weight 2500 lb. 1135 Kg