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Filtering units

Welding station ERGO-STW


The ERGO-STW are applied as fully ventilated welding posts. They serve for extraction the air polluted with dry dusts formed generally during metal welding. The dust is captured directly close at the source of emission, in two directions: upwards – through the self-supporting extraction arm, or downwards – through the suction chamber topped with grate. For the ERGO-STW-R a connection with the discharge ventilation duct is needed (removing the extracted volume outside the building), whereas ERGO-STW-F has a built-in filtering unit under the worktable and the cleaned air is recirculated back to the room to avoid the thermal loss in winter.


In both versions, the self-supporting structure contains a suction chamber with a damper (directly under the worktop) and grate in the worktop. For welding the small elements is the rotary table.

There is also a clamp for a mass-cable (grounding) of the welding machine. To the table is mounted a 2-meters’-range ERGO extraction arm with damper and easy-to-handle hood. Depending on the position of the dampers, the extraction can follow upwards (and to the side) through the hood or downwards through the grate and suction chamber.

Welding station EGO-STW-R Welding station EGO-STW-F

ERGO-STW-R consists of:

  • workshop table with a tool cabinet
  • extraction fan
  • electrical unit
  • extraction arm

ERGO-STW-F consists of:

  • workshop table with a tool cabinet
  • filtering unit
  • extraction arm

The filtering unit is equipped with a fan, cartridge filter, pneumatic filter regeneration system and control unit. Impurities that have accumulated in the outer filter surface, are struck down (into the waste-container) by the cyclical pulses of compressed air.

Pneumatic filter regeneration system consists of a compression air tank, and an electromagnetic valve. Therefore the device has to be connected to the external compression installation.

Both the welding stations are offered in two modes of the fan operation:

  • ERGO-STW-R or STW-F – the fan is operated manually.
  • ERGO-STW-R-A or STW-F-A is adapted for automatic fan operation at the moment of the electrical welding arc flash. In this application the extraction arms is additionally equipped with a halogen spotlight.
welding station - ERGO-STW-R
welding station - ERGO-STW-F

Technical data

Part # 704U64 704U65 704U66 704U67
Supply [V] 3 × 230/460 120
Motor rate [HP] 0.75 1.5
Weight [lb] 362 551
Noise level [dB(A)] 72 68
Volume flow [cfm] 600 600
Disposable pressure [in. w.g] 1.2
Recommended pressure
of external installation [bar]
Connection diameter to
discharge the polluted air [in]

* Version adapted only for manual fan operation.
** Version adapted for automatic fan operation at the moment of welding arc flash.

Cartridge filter – replaceable for ERGO-STW-F

ERGO-STW-F cartridge filter Type Part # iltering
[sq. ft]
Filtering efficiency Application
PT-20-U 838F27 215 teflon-coated polyester 99.5 %
  • welding dusts, dry
    fine dusts, for
    example: bismute,
    cement, dust in food production,
    industry, chemical industry
  • water and oil resistant

NOTE: Placing the order specify the part № and type designation of the given device.