Technical Information

Dust Collection Units and SystemsAccording to the requirements for collecting dust in the air

2 Dust Collection Units and Systems

Dust Collection in Technical Orthopaedic Workshops

Requirements for collecting dust in the airDust arises in the orthopaedic workshop during the milling and sanding of various materials, such as plastics, wood, fibre glass and carbon fibre materials.

Scientific studies on the one hand and a high environmental awareness on the other have led to ever more discoveries about the health risks of dust arising from wood and plastics.

If unhealthy levels or concentrations of dust arising at the workplace cannot be avoided, it must be collected at the point where it is created and removed.

Occupational safetyAs well as the content of hazardous substances in the dust, the size of the dust particles is the decisive parameter from a health perspective. Particles with a diameter greater than 10 µm, known as coarse dust, are generally trapped by the nose hairs or the mucous membrane in the nose and throat region.

Smaller and smallest dust particles of less than 10 µm (fine dust, ultra-fine particles) can advance via the windpipe and the bronchial tubes deep into the lungs. For this reason, fine dust is also described as inhalable or respir-able (alveolar) fine dust.

With the increased use of milling and grinding machines, the collection of wood and synthetic material dust and chips is becoming more and more important. Large-scale dust collectors in machine rooms or central dust collectors in separate rooms offer optimum protection for prosthetists/orthotists.

Dust Collection Units and Systems 3

• Room concept and furnishing suggestion for machine room – wood/plastics – with central dust collection system for two machines.

Regulatory requirementsThe occupational exposure limit value (OEL) is the time-weighted average concentration of a substance in the air at the workplace, for which acute or chronic damage to the workers' health is not expected. The occupational exposure limit value (OEL) is given in mg/m³ and ml/m³ (ppm).

The EU occupational exposure limit value (binding limit value – BLV) must be adopted by all Member States of the EU as a minimum standard.

Dust collection systemsIn order to comply with the legally required low residual dust levels at the workplace specified in OEL and BLV, dust collection systems with air recirculation are used. This 100% air recircula-tion and the compliance with the occupational exposure limit values require the installation of appropriate filter systems.

In order to comply with this low residual dust level at the workplace, a dust collector must achieve minimum collection speeds of 20 m/sec, nominal volumetric flows of at least 1,000 m³/ per machine and a residual dust level in the recircu-lated air of 0.2 mg/m³ (H2).

The performance of a dust collector thus depends on the number of machines being operated simultaneously. The Ottobock portfolio includes tested dust collectors that safely achieve a residual dust level of 0.1 mg/m³ (H3) in the recirculated air.

Controlled dust collection systems –“energy saving” using advanced technologyThe Large-capacity Dust Collection Systems SMU 3000, SMU 4500.11 and 6000.1 as well as all central dust collection systems can be additionally provided with a speed control (frequency converter). This advanced and intelligent technology allows adaptation of the collection performance to the corresponding work situation. Due to speed regulation in accordance with the requirements as well as the special construction of the fans, optimal power to capacity of the collection system is achieved. According to our experience a reasonable cut in operating expenses (reduced energy consumption) as well as a considerable reduction of sound emission can be realised in this way.

4 Dust Collection Units and Systems

Dust Collectorfor Connection of One Machine701Z120

Entstauber

Trichter-Fräsmaschine

1 2 3

Electrical equipment:• 701Z120 with 2 m power cord

with CEE plug 5 × 16 A• 701Z120=USA with 2 m powercord

without plug

1 Top view2 Mobile dust collector 701Z1203 Side view

Mobile dust collector, designed to capture, transport and separate drymaterials such as wood and plastic dust and shavings. This dust collector is suitable for the connection of one machine.

Characteristics of this unit:• Very efficient operation• High dust collection capacity• Low operational costs• Flexibility• Mobile and compact design• Easy maintenance• Long-life filter• Universally usable• Easy to handle and operate• complies with the criteria

for the ”H3” test mark

Dust collector

Socket router

Socket router Dust collector

Delivery includes:• 1 Dust collection bag

Dust Collection Units and Systems 5

Mobile dust collector for collecting, extracting and separating dry wood and plastic dust and chips, suitable for dust collection from two machines simultaneously. Connection of several machines is possible, provided the sum of collection system mounts' cross-sections of the machines to be simultaneously connected to the dust collector is less than the exhaust connection piece cross-section of this 701Z12 dust collector. In addition, the collection system mounts must be equipped with automatic gate slides.

Characteristics of this unit:• Conforms to the requirements of the

GS HO-07 bulletin of the German Holz-BG professional association

• Solid compact design• Optimal dust collection achieved by

pre-separation and effective filtration

1 2

• High level of efficiency achieved by means of a ventilating fan placed at the clean-air side

• Superior dust collection performance• Durable, long-life filter• Easy to handle and operate

Electrical equipment:• Switch box with main switch and

integrated restart inhibit, volume flow monitor with signal lamp, gate slide control and automatic start-up for 8 machines

• 3 m power cord with CEE plug 5×16 A and CEE socket 5×16 A

Dust Collector for Connection of Two Machines701Z12

1 Room concept suggestion2 Dust collector 701Z12

6 Dust Collection Units and Systems

1 2

• The fan is situated at the clean-air side and is fitted with an auxiliary system resulting in exceptional dust collection capacity with minimal effort

• Pressure-proof construction 200 mbar (SMU 4500.1 and SMU 6000.1)

• Suitable for the separation of wood dust, residual dust rate of H3 <0,1 mg/m3 is safely observed

• Conforms to the requirements of the GS HO-7 for SMU 3000 or HO 14 bulletin of the German Holz-BG professional association

Electrical equipment:• 5 m power cord with CEE plug

and phase inverter • Switch box with main switch, auto-

matic start-up, automatic and manual filter cleaning function as well as integrated volume flow monitor with signal lamp, gate slide control and automatic start-up for 8 machines

Large-capacity Mobile Dust Collectors for Connection to Three, Four or Six MachinesSMU 3000, 4500.11 und 6000.1

1 Room concept suggestion 2 Large-capacity dust collector SMU 4500.11

Mobile dust collector for collecting, extracting and separating dry wood and plastic dust and chips, suitable for dust collection from three, four or six machines simultaneously. Connec-tion of several machines is possible, provided the sum of collection system mounts' cross-sections of the machines to be simultaneously connected to the dust collector is less than the exhaust connection piece cross-section of the SMU dust collec-tor. In addition, the collection system mounts must be equipped with automatic gate slides.

Characteristics of this unit:• Efficient sound proofing resulting

in minimal noise emissions• Highly effective filter elements

with compressed air• Pre-separation chamber for the

sedimentation of shavings and coarse debris

Delivery includes:• Solid, welded frame• Collection containers• Filter chamber with

pre-separator, filter elements and compressed air self-cleaning

• Automatic fire extinguishing device (except SMU 3000)

• Ventilator chamber with exceptional noise reduction

• Ventilator with three-phase-current motor

• 6 one-way dust bags

Accessories:• Speed control• Exhaust tube parts• Pneumatic gate slides

Exhaust connection piece Ø (nominal diameter) 120 mmNominal volume flow 814 m³/hVolume flow monitor Vacuum gaugeNominal negative pressure at the interface 2180 PaFilter surface area 4,3 m2

Filter material Category C, BIA Certificate, electrically conductive, washableMax. sound intensity level 75 dB (A)Dust collection volume 135 lDimensions (L × W × H) 1178 mm x 650 mm x 1972 mm Power requirements 701Z120 3 x 400 V/N/PE; 50 Hz, 1,5 kWPower requirements 701Z120 = USA 3 x 208 V/without N/PE; 60 Hz, 1,5 kWWeight 103 kg

Exhaust connection piece Ø (nominal diameter) 180 mmNominal volume flow 2300 m3/hVolume flow min. 1830 m3/h, max. 2300 m3/hExternal pressure 2000 PaMinimum volume flow 1830 m3/hNegative pressure at minimum volume flow 2600 PaFilter surface area 10,6 m2

Filter material Category C, BIA CertificateResidual dust content H3 < 0,1 mg/m3 safely observedSound intensity level at 1 m distance ≤ 68 dB(A)Dust collection volume 180 lDimensions (L × W × H) 1620 mm x 820 mm x 1880 mmPower requirements 3 x 400 V/N/PE; 50 Hz; 3 kWWeight ca. 410 kg

Technical Data

Dust collector 701Z120

Dust collector 701Z12

Large-capacity dust collectors

Technical Data SMU 3000 SMU 4500.11 SMU 6000.1Exhaust connection piece Ø (nominal diameter)

200 mm 250 mm 300 mm

Nominal volume flow 3000 m3/h 4700 m3/h 6000 m3/hMinimum volume flow 2260 m3/h 3540 m3/h 5080 m3/hExternal pressure 2650 Pa 3100 Pa 2300 PaFilter surface area 12,5 m2 22 m2 28 m2

Filter cleaning pneumatically or with jolter motor pneumatically or with jolter motor pneumatically or with jolter motorSound intensity level at 1 mdistance

≤ 68 dB(A) ≤ 69 dB(A) ≤ 72 dB(A)

Dust collection volume 2 x 230 l 2 x 230 l 3 x 165 l

Dimensions (L × W × H) 1964 mm x 900 mm x 1965 mm 2200 mm x 900 mm x 1965 mm 2710 mm x 900 mm x 1965 mm

Power requirements 3 x 400 V/N/PE; 50 Hz; 4,0 kW; CEE-Plug 5 x 16 A

3 x 400 V/N/PE; 50 Hz; 5,5 kW; CEE-Plug 5 x 16 A

3 x 400 V/N/PE; 50 Hz; 7,5 kW; CEE-Plug 5 x 32 A

Operating mode continuous operation continuous operation continuous operation

Weight 680 kg 780 kg 850 kg

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With compliments

Otto Bock HealthCare GmbHMax-Naeder-Straße 15 · 37115 Duderstadt/Germany T +49 5527 848-1706 · F +49 5527 72330 export@ottobock.de · www.ottobock.com