Alveolar rotary valves are mostly used as locking elements or for extraction of granular or pulverized products while preventing air loses or intrusions.
They are also used as volumetric proportioners to feed different types of machines in diverse industrial processes.

In this case, a precisely regulated dosage can be achieved just by change of the rotation speed.

GRUBER HERMANOS alveolar rotary valves are of three different classes : with loose shaft end (TV arrangement), with attached drive running perpendicularly to main shaft of the valve (B3 arrangement) and with attached drive coaxial with the main shaft (DB5 arrangement ).

COMMON CONSTRUCTIVE DETAILS

MAIN BODY :
In carbon steel, , stainless steel or wear proof. Carefully machined, they are over dimensioned to allow for future adjustments.

ROTOR:
Wrought steel hub and laminated steel blades.

TIGHTNESS:
Is achieved by means of packing glans of easy interchangeability.

BEARINGS:
The rotor is supported on both ends by bearings set away form the body of the valve.

DRIVE:
Normally by means of a gear motor fitted with torque limiter.

GEAR BOXES:
A wide range of speed reducers is available in order to achieve different volumetric capacities.

MAIN FIELDS OF APPLICATION

• Pneumatic conveying.
• Spray dryers.
• Cyclones.
• Filters.
• Centrifugal classifying installations.
• Pneumatic machines in low pressure installations.
• Product extraction from pressure or vacuum vessels