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Rotary Valve Type HDS

Válvula Rotativa Tipo HDS

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Rotary valves are used for reliable measured discharge of various kinds of solids and powders from silos as well as feeding devices into pneumatic conveying systems.


Rotary valves are capable of dosing dry products of homogeneous granulometry by means of a rotor divided into chambers.


The product from the equipment installed on the rotary valve flows to the bottom through the movement of the rotor, carried out continuously and promoting a regular flow of product.


Zeppelin Rotary Valves can be made of aluminum, with rotors in sizes 200/250/320/400/500 or 630 mm and made of stainless steel.


Drilling of flanges according to ANSI 150# or DIN 2501 PN 10. E for differential pressure limit of 3.5 bar (g).


It has the capacity range:

  • For powder from 4.0 to 124.5 m3/h and;

  • For granulate from 4.0 to 172.5 m3/h.


  • Optimized inlet / outlet cross-sections for gentle product feeding;

  • Deflector integrated into the housing, no obstruction in the product feeding process;

  • Leakage air collector and leakage air nozzle integrated into the housing;

  • No product deposits in leakage air collector due to optimized design;

  • Solid temperature range from -10º C up to + 60º C and ambient temperature range - 10º C up to + 40º C for standard design (further on request);

  • Minimum leakage air due to special manufacturing and 13 chamber rotor system;

  • Circular inlet and outlet flange - piping without transition pieces;

  • Mounting devices direct at housing;

  • Flanges easy accessible with standard bolting;

  • Simple maintenance due to easy access to accessories;

  • Quick adaption to changed operation conditions by standardized drive unit;

  • Clear separation between the drive unit and housing;

  • Housing designed for 10 bar(g) pressure;

  • The direction of rotation and rotor speed can be checked optically during operation;

  • Bearings with lifetime lubrication.


  • Dosage: Allows volumetric control of the material to be transported (powder, grains, fine materials, high temperature or abrasive products), in a measured and reliable way. 

  • Sluice: Allows to isolate the entrance of a high pressure system, restricting the passage of air or gas, but releasing the passage of solids in the opposite direction to the pressure gradient.

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