High vacuum unit HFU-A
Filter unit with integrated ATEX side channel blower, vacuum limiter, Brilex explosion membrane and outlet silencer. For application at extraction/cleaning of dry dust that is ATEX-classified. Relief membrane is placed on filter unit backside. Unit is equipped with differential pressure cleaning of filter cartridges.
- Polluted air is led into unit through tangential inlet in raw air chamber top.
- Air is filtered through vertical-placed filter cartridge with internal filter core for optimal cleaning effect
- Differential pressure controlled filter cleaning by integrated compressed-air system
- Sound is damped by channel silencers on outlet integrated in unit.
- Dust collected in dust container in unit bottom that is suspended in ø400mm/16-system flange
- Explosion membrane is placed on unit backside
Unit constructed for use at ATEX-zones 21-22 and standard equipped with explosion membraneog standard forsynet med en aflastningsmembran, intended for burst at an explosion, whereby unit is relieved and explosions controlled.
| Variant | 1 |
| Inlet and raw air chamber: | Zone 21 |
| Clean air chamber and outlet: | Zone 22 |
| Surroundings: | Zone 22 |
Unit is standard dimentioned for KST 300bar m/sec. and Pmax 10bar (similar to ST2)
Side channel blower as vacuum pump and automatic filter cleaning by compressed-air enables continually operation. The compact construction on strong transport platform ensures that the vacuum cleaner unit is easy to move and do not occupy much space.
| Filter: | Cartridge filter: ø325mm. Length: 660mm |
| Filter control: | Differential pressure control type ECO-S with aut. after-cleaning 230V (constant) |
| Compressed-air: 5.5 - 6.0 bar dry compressed-air. Unit equipped with ø8mm pneumatic hose (Compressed-air quality according to ISO 8473-1 2.4.1.) | |
| Differential pressure can be read in integrated manometer | |
| 1"-jet valve connected to central compressed-air tank in clean air chamber | |
| Filter replacement: | Standard from clean air chamber top |
Filter material: | ||
| Standard | Filter material | Applied for |
| G113 | Polyester fleece with PFPT coating, antistatic | Statically charged or hygroscopic particles |
| Alternative: | ||
| G116A | Polyester fleece with Teflon membrane, antistatic | Finer statically charged dust types |
The filters meet demands for extraction degree for dust class M according to DIN EN 60335-2-69 Appendix AA (extraction degree > 99.9%).
Material:
Membrane: AISI 304
Relief pressure: +0.2bar
Relief area is calculated for the individaul unit for Kst = 300 bar m/sec and Pmax = 10 bar
Relief membrane is designed as a single unit, which provides a light construction and thus fast opening. The membrane is especially developed for dust explosion relief and gives a reliable ensurance, since it relieves at an early stage, already in the start of an explosion.
NOTE
At installation of units with relief membrane you must be aware of the heavy pressure wave and the flame spread that will occur in areas outside of the relief membrane and mount the unit so that the explosion is led away from people and building components.
High vacuum unit type HFU-A is constructed according to:
- Machine Directive 2006/42/EF
- ATEX-Directive 214/34/EU
- EMC Directive 2014/30/EU
- Directive 2014/68/EU about pressure equipment
- Low Voltage Directive 2014/35/EU
- Harmonized standards: EN 13854, EN 4414, EN 12100, EN 60204-1, EN ISO 13857
- Further standards: ISO 3746
Filter cabinet is made in 2mm black steel plate
Surface powder enamelled RAL 5007/7011 structure
- Version in hot-galvanized, enamelled steel plates for outdoor mounting
- Filter replacement from the side
- Sack insert for 70L-dust container
- ½"-pressure regulator with manometer and pressure reducing valve
- Various high-pressure piping, fittings and coupling for fixed unit assembly
- Various sliding dampers and flap valves that possibly can be equipped with micro-switch for extraction start
- Various controls and system surveillances
- Various pin-point extractions, hoods, slot nozzles, plastic adapters for valves, hoses and cleaning equipment
- Rupture sensor type GMG12000K
High vacuum unit type HFU-A is available in the sizes as stated in the form below.
Please, contact us for assistance in selecting the optimal unit taking into consideration air volume, dust type and volume, operation times etc.
