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GSL 9-12-12 IM Page 4

1 SPECIFICATIONS

NOVATEC GSL Series vacuum loaders are completely automatic self-cleaning vacuum loaders

designed to convey virgin pellets and regrind materials from storage containers to drying hoppers

or directly to process machines.

Each unit is shipped complete with all controls for immediate operation, and include a hardware

package. The hardware package includes 15 feet of flexible vacuum hose, hose clamps and a

material pick up lance, plus a 12’ extension cable for remote mounting the standard Control

Pendant.

The GSL-19 is designed for mounting on drying hoppers.

The GSL-19-MM is designed for mounting on a process machine and is supplied with 8 lb.

capacity sight glass with a height adjustable photo-eye demand switch.

1.1 Options:

Additional tubing and fittings (Rigid tubing, elbows, bolted couplers, etc.)

External Proportioning Valve

Purge Valve

Proximity Switch, Capacitance Type

Spare 12’ control pendant

2 PRINCIPLE OF OPERATION

A Load Cycle begins with a compressed air blowback pulse to clear any isolated material particles

or dust buildup that may remain on the flapper discharge valve. This action ensures a tight

vacuum seal for each Load Cycle.

The loader then activates our powerful, maintenance free, brushless motor to create a vacuum,

which draws material into a chamber. After the load time setting has expired, the vacuum motor is

turned off and the negative pressure in the chamber is relieved. Material in the chamber then falls

through the bottom, past the flapper while compressed air is pulsed through the filter to dislodge

any contaminants or fines that may have accumulated. This cycle is repeated as many times as

necessary, until the unit is shut off by the rise of the conveyed material in the area below the loader

which trips the level switch, removing the ‘demand’ signal.

Machine mounted units do not have a flapper valve or mercury switch, but instead utilize a clear

sight tube, which mounts directly to the machine throat, with a sensor to control loader operation

based upon the level of material within the sight tube. The sensor may be either a capacitance

style, with sensitivity adjustment, or a pair of photoelectric sensors, an emitter and a receiver.

The bottom flange of a Machine Mount unit is normally supplied undrilled to allow the customer to

drill the appropriate mounting pattern for a particular process machine.

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