Application
VT Rotary valves are used as volumetric feeders for pellets for pneumatic
conveying systems and as dischargers or Metering Valves below silos
and hoppers. Granular materials are free flowing but they have a tendency
to become pinched between rotor and housing at the inlet; VT Rotary
Valves are non jamming and eliminate need for flexible blade tips or
inclined blades which will not solve the problem.
Size
Available six standard sizes: 4, 6, 8, 10, 12, 16.
Pressure range
Up to 1bar pressure differential.
Temperature
Handled material temperature up to 120°C.
Construction materials
• Housing and end plates
Cast iron, stainless steel, aluminium
• Rotor
Carbon steel, stainless steel, hardened steel replaceable blade tips
• Internal surface treatments
Nickel-plating, chrome-plating, anti-adhesive surface
• Packing
PTFE, graphite
• End plate O-ring
NBR, Silicone for food industry
Rotor
8 (standard), 10 or 12 vanes open end, fabricated construction and bevelled
edge; open end with replaceable blade tips.
Drive
Chain drive with helical gearmotor.
Special version
Valves with easy removable rotor for fast cleaning
(VTS version).
Features
1 Shaft with key
Extra heavy-duty to decrease
flexion and to provide maximum torque.
2 Out-board mounted sealed ball bearings, maintenance free
The ball bearings are provided with high quality grease.
No re-greasing required.
External bearings prevent the material from entering into the bearing.
3 The shaft seal is with PTFE packing glands.
4 Cast iron, stainless steel or aluminium end plates
NBR or Silicone End plate O-ring for food industry.
5 A special orifice is used at the inlet, designed to direct
material into the rotor pockets, eliminating pinching of pellets between
the rotor and the housing.
The maximum pocket fill is equivalent to the 40% of the rotor geometrical
capacity.
6 8 (standard) or 10 vanes open end rotor, fabricated construction,
bevelled edge and machined to close tolerance.
7 The housing is designed to obtain low leakage and
high filling efficiency.
Large air integral vent openings for special operating conditions.
