Delfin ZFR EV AP 560 K2 Z22

The K2 (2.2 kW) is the largest 'standard' motor choice before stepping up to a 4 kW industrial motor, and it strikes a particularly good balance in the centrifugal characteristic. At 2,500 m³/h airflow and 21 mbar vacuum it handles 3-4 simultaneous extraction arms without visible capacity loss, and the IE3 motor is operationally economical, quiet and with moderate current draw (typically 4-5 A). The K1 (1.1 kW) is often too weak for continuous multi-point operation, and the K4 (4 kW) is often overkill with double current draw and higher purchase price. Statistically 60-70 % of Danish ATEX installations choose K2 for typical welding, grinding and powder handling applications.

With 21 mbar static vacuum the model typically handles 8-12 metres of smooth oe200 steel pipe without visible loss of suction-point vacuum -- provided simple, short bends and clean filters. If you reach 15-20 metres or introduce several 90° bends, the suction-point vacuum will drop by 3-5 mbar per additional length-metre once bends and transitions are accounted for. For installations over 20 metres the K4 (370 mmH²O = 36 mbar vacuum, 60-70 % greater) is the correct choice. Note that pressure drop is not linear: a clogged primary filter or a 90° bend costs more than the equivalent length-metre of clean hose.

It depends naturally on the process source, but for typical welding fume extraction on MAG steel the measured aerosol level in the source zone is ca. 5-15 mg/m³. With 2,500 m³/h airflow and 80 % capture rate the deduster collects ca. 10-30 g/h -- 80-240 g per 8-hour shift, corresponding to 0.5-1.5 L volume. This means the 100-litre container on the K2 typically needs emptying every 1-3 months for welding applications. For heavier applications such as grinding dust (50-150 mg/m³) or granulator (100-500 mg/m³) the container must be emptied every shift or every day. Dust density governs the container interval far more than the airflow figure.

The standard model is supplied with a local start/stop button on the deduster itself -- an operator must be physically nearby to start and stop. LOC REM (Local/Remote) is an option that adds a 24V remote control input plus electrical panel, so the unit can be started/stopped from a central control station, a PLC, or via a compressed-air signal from the processing equipment the deduster serves. It is mandatory on larger central suction systems where the deduster stands in a separate technical room and is not to be accessed manually during production. LOC REM is Delfin code +1,562.50 EUR (2026 price level) -- typically quickly recouped in automated applications.

No, the model has manual filter cleaning via an external handle next to the filter housing -- the operator pulls the handle a few times daily to shake the primary filter clean. If you require automatic filter cleaning for continuous operation, you should instead choose the CUBE 20 PN model in the same capacity class, which has pulse-jet based automatic cartridge cleaning. Manual cleaning is fully sufficient for most multi-point applications, and it prevents overflow protection by giving the operator a clear 'handle' on system health. A clogged primary filter manifests as falling suction-point vacuum -- typically markedly below 15 mbar -- and is the first sign that the handle should be pulled.

Three options are worth considering. (1) PTFE ANT (class M antistatic filter) -- replaces standard polyester primary filter for even lower dust pass-through and greater chemical resistance; surcharge ca. 434 EUR. (2) X / XX / XXX stainless steel AISI 304 -- replaces painted steel in collection container, container + filter chamber, or entire construction respectively; important with moisture, chemical attack or hygiene-critical processes (pharma, food); from 785 EUR. (3) MT earth grounding -- included as standard, but double-check installation verifies continuity. PTFE and X options are typically relevant for chemical and pharma; MT is an ATEX baseline requirement on all Zone 22 installations.