VTRA range · adjustable vacuum

VTRA Venturi pneumatic conveyors

VTRA Venturi conveyors combine a high vacuum level, down to −84 kPa, with manual flow adjustment by rotating ring. They are perfect for drawing denser materials or conveying over longer distances.

Four sizes are available, from the VTRA 250 to the VTRA 750 (3,390 NL/min), with female threaded ports, in anodised aluminium.

Max. vacuum
−84 kPa
Max. flow
3,390 NL/min
Models
4
Price from
€230.00 excl. VAT
Range of VTRA 250, 375, 500 and 750 Venturi pneumatic conveyors

The 4 models of the VTRA range

From the compact VTRA 250 to the powerful VTRA 750: choose by flow and bore.

Key features of the VTRA range

  • High vacuum down to −84 kPa for dense materials
  • Flow adjustable by hand with the rotating ring
  • Straight-through bore: continuous, clog-free conveying
  • Female threaded ports (G1/8 to G1) for easy installation
  • No moving parts, no special maintenance
  • Anodised aluminium body, light and corrosion-resistant

Typical applications

  • Unloading vibratory feeders and hoppers
  • Reloading hoppers with plastic regrind
  • Transferring engine valves and small parts during grinding
  • Removal of drilling chips
  • Transfer of powder detergent and caustic chemicals
  • Conveying peanut husks and light materials
  • Edge trim removal and mandrel collection
VTRA range datasheet PDF document · dimensions and performance
VTRF Venturi pneumatic conveyor in operation
VTRF Venturi pneumatic conveyor in operation Demonstration of a VTRF Venturi pneumatic conveyor: suction and conveying of material with compressed air, no moving parts. Watch on YouTube · MP4

Technical specifications of the VTRA range

All values for the range: the highlighted row is the model you are viewing.

Dimensioned drawing of the VTRA Venturi conveyor Suction (G1) Outlet (G3) Compressed air (G2) Adjusting ring EFDH ØAØBØC
Schematic drawing — letters refer to the dimensions table below.

Dimensions (mm) and connections

Model ØAmm ØBmm ØCmm Dmm Emm Fmm Hmm G1 G2 G3
VTRA 250 6.5 19 32 94–105 22 32 5 G1/4 G1/8 G1/4
VTRA 375 9.5 25 45 155–165 38 45 5 G3/8 G3/8 G1/2
VTRA 500 13 32 51 155–160 38 51 5 G1/2 G3/8 G3/4
VTRA 750 19 38 58 175–189 38 51 5 G3/4 G1/2 G1

Air consumption (NL/min) by vacuum level, at 5.5 bar

Model −17 kPaNL/min −34 kPaNL/min −50 kPaNL/min −68 kPaNL/min −84 kPaNL/min
VTRA 250 112 169 233 276 342
VTRA 375 176 327 485 595 825
VTRA 500 340 625 795 940 —
VTRA 750 650 875 1,250 1,790 —

Suction flow (NL/min) by vacuum level

Model −17 kPaNL/min −34 kPaNL/min −50 kPaNL/min −68 kPaNL/min −84 kPaNL/min
VTRA 250 280 240 200 162 125
VTRA 375 846 735 620 520 395
VTRA 500 1,695 1,325 1,130 990 —
VTRA 750 3,390 2,460 1,970 1,440 —

Weight by material (g)

Model Aluminiumg
VTRA 250 100
VTRA 375 286
VTRA 500 401
VTRA 750 540

How it works

How does a Venturi pneumatic conveyor work?

A Venturi conveyor turns compressed air into powerful suction, with no motor and no moving parts. Simply connect it to your air supply and to a conveying hose.

  1. 1
    Compressed air injection

    Air enters through the side port and fills an annular chamber around the central bore.

  2. 2
    Venturi effect

    Air is accelerated through nozzles pointing towards the outlet, creating strong vacuum at the inlet.

  3. 3
    Material suction

    Powders, granules, chips or small parts are drawn in through the inlet hose.

  4. 4
    Conveying and discharge

    The air stream carries the material to the discharge point, with no risk of clogging.

Diagram of the Venturi effect in a pneumatic conveyor 1 Compressed air 2 Venturi effect 3 Suction 4 Discharge

Why choose a VTRA Venturi conveyor?

The VTRA range stands out for its high vacuum, ideal when the material is heavy, the circuit long or a significant height must be overcome. Its adjusting ring lets you fine-tune suction flow to the material conveyed, saving compressed air.

The tables above show air consumption and suction flow at each vacuum level: the higher the vacuum required, the lower the flow. Choose a model that delivers the required flow at your application’s vacuum level.

Need help sizing your installation? Request a free quote.

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