High vacuum unit HFU-A

Compact high vacuum unit for ATEX zone: 21/22 that can be used as a central vacuum cleaner for cleaning or connection to a hand tool.

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.

Dust class

Product Features

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

Product Highlights

Easy to move by hand pallet truck or fork lift

Moveable unit
230V-power cable with plug and ø8mm-compressed-air hose are located on unit front.

Easy connection
At the inlet the relief membrane is placed

Explosion membrane
Quicklock-adjustable dust container ensures user-friendly service

Dust container

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 type KMS-MOR-ATEX

Side channel blower placed on vibration absorbers in sound enclosure
Vacuum limiter mounted on inlet
Guided cooling air by cooling ribs in cabinet.

Capacities

Air volume:	Up to 1,100m³/h
Vacuum:	Up to 38,000Pa
Filter area:	13m²

Optimized moveable vacuum cleaner solution with long operation times

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	Material	Used for
G113	Polyester flake with PFPT-coating, antistatic	Static-loaded or hygroscopic particles
Alternative:
G116A	Polyester flake with teflon membrane, antistatic	Finer static-loaded dust sorts

The filters meet demands for extraction degree for dust class M according to DIN EN 60335-2-69 Appendix AA (extraction degree > 99.9%).

Explosion membrane:

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.

Principle sketch for flow through high-vacuum unit type HFU-A

Construction/surface:

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

Further is available:

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.

1) Filter cartridge ø325x660mm/13,5mm, 13m², G113 (08 128 900) as well as delivered with one jet valve
2) Pressure drop stated over filter cartridge
3) Motor voltage: 3x400V