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Stationary filters

MDB-4 Compact

Due to its compact design the MDB-4 Compact is the ideal choice for applications where a filter is needed near to the source of pollution.

  • Pre-assembled compact design with integrated fan
  • Front panel cartridge changing
  • Easy to empty dust drawer

The MDB-4 Compact is a filtration unit with an unbeaten technology

Recommended for

  • Automated production processes
  • (Laser) welding
  • Cutting

With the MDB-COMPACT Plymovent brings you the proven and unbeaten technology of the MultiDust Bank in a compact and pre-assembled range of models. The MDB-COMPACT is available with a wide choice of filter media and can be used for almost any airborne dust pollutant*. Due to its compact design the MDB-COMPACT is the ideal choice for applications where a filter is needed near to the source of pollution.


  • Pre-assembled compact design with integrated fan
  • Front panel cartridge changing
  • Easy to empty dust drawer
  • SilentFlowTM duct free noise reduction for compact installation
  • Ram-AirTM pulse amplifier provides better cleaning for longer filter cartridge life and lower pressure loss

Step up your game against fumes and dust from automated production processes, (laser) welding and cutting with one of these options

  • MDB-2 Compact
    Number of filter cartridges: 2, Capacity of dust drawer: 33 litres (8.7 gallon), Power (fan): 2.2 kW (3 HP), Max. airflow: 2850 m3/h (1675 cfm)
  • MDB-4 Compact
    Number of filter cartridges: 4, Capacity of dust drawer: 72 litres (19 gallon), Power (fan): 4.0 kW (5 HP), Max. airflow: 5025 m3/h (2960 cfm)
  • MDB-6 Compact
    Number of filter cartridges: 6, Capacity of dust drawer: 72 litres (19 gallon), Power (fan): 7.5 kW (10 HP), Max. airflow: 7180 m3/h (4225 cfm)

Metalworking industry

Plymovent is renowned for its expertise in capturing and filtering fumes from metal welding and cutting. In this industry, the MDB-COMPACT is the filter of choice for automated production processes that need a small dedicated filter like (laser) welding, and cutting. Whether the fumes are dry or oily** the MDB-COMPACT can do the job.

SilentFlowTM duct free silencer

The MDB-COMPACT has an integrated fan placed in a SilentFlowTM sound absorbing box. SilentFlowTM reduces both the mechanical and airflow noise of the fan. An acceptable noise level without additional ducting*** at the exhaust side of the filter makes the overall installation more compact and easier to install.

Ram-AirTM low operational costs

A Ram-AirTM pulse amplifier is placed in each filter cartridge and disperses the pulse energy directly to the filter medium. The results are significant: cleaner filters, lower pressure drop, less compressed air and energy consumption. Ram-AirTM means low operational costs.

Plymovent BiCo filter cartridges last longer

Filter life is not only determined by cleaning efficiency but more often by the strength of the bonding between the fibers in the media. When the bonding breaks, the pressure drop rises immediately and airflow drops. This normally means a costly filter cartridge replacement. Plymovent BiCo cartridges are based on state of the art bi-component technology. Plymovent selects only media with a proven performance and that is why Plymovent cartridges last longer.

Filter control via intuitive touch screen

The MDB-COMPACT PRO filter system is combined with the intelligent control platform ControlPro. It offers an extensive feature package to monitor and control the filter cleaning system based on adjustable threshold values, the type of extraction fan, the required airflow and the corresponding fan speed. By means of the user-friendly HMI with intuitive touch screen, all parameter settings of the system are configurable through a clear and easy accessible menu structure. And moreover, it gives a clear insight into the system status and performance at all times. When there are multiple MDB filter systems, they can be controlled by one single ControlPro.

If desired, you can extend this control system with ControlPro Connect. This is an advanced web portal that gives you the power to monitor, manage and control any number of filters from your PC, tablet or smartphone.

* not explosive dust

** at high oil content OilShield limestone feeder is recommended

*** if allowed by local standards, codes and legislation

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    Physical dimensions and properties

    Material (housing):
    Electro-zinc coated steel (according to DIN EN 10152)
    Steel grade
    Steel grade no.
    Front and back
    Grey RAL 7011
    Sides and top
    Yellow RAL 1004
    Refer to Table 1 | Remaining specifications on page 4
    ControlPro/Panel *)
    400 x 400 x 210 mm (15¾ x 15¾ x 8¼ in.)
    *) excl. switches and cable glands
    255 x 165 x 125 mm (10 x 6½ x 4⅞ in.)

    Filter cartridge

    Filter cartridges are not included and must be selected and ordered separately. For more details: refer to the separate data sheet.
    Available filter cartridges:
    Filter material:
    • CART-D Premium Plus
    • BiCo spunbond polyester
    • CART-D Premium
    • Spunbond polyester
    • CART-D Economy
    • Cellulose
    • CART-C
    • BiCo spunbond polyester, antistatic
    • CART-E
    • BiCo spunbond polyester + PTFE impregnation
    • BiCo spunbond polyester + PTFE membrane
    • CART-MB
    • Cellulose with polypropylene microfiber overlay, electrostatically charged


    Fan type
    Motor design
    Motor protection
    By PTC thermistor
    Efficiency level
    Motor speed
    Max. 3500 rpm

    Compressed air system

    Required compressed air quality
    Dry and oil-free according to ISO 8573-3 class 6
    Required pressure
    4-5 bar (60-75 PSI)
    Compressed air connection
    Push-in fitting:
    • In: G ⅜ in.
    • Out: 12 mm

    Electrical data

    Connection voltage of fan
    • 230V/3ph/60Hz*
    • 460V/3ph/60Hz
    • 575V/3ph/60Hz

    * The compact design of the unit, in combination with a high air performance, is achieved by using 60 Hz fan technology. For this reason it is necessary to install a variable frequency inverter (VFD) for 50 Hz power grids (e.g. in Europe). For 60 Hz power grids a frequency inverter is optional.
    Input voltage for magnetic valves
    24V DC

    Product combinations

    SHIELD fire safety solutions (prevention):
    Cyclonic spark arrester
    Limestone feeder
    Combination with SHIELD fire detection and suppression products is not possible

    Options and accessories

    Compressed air regulator
    Compressed air sensor
    Precoat material (for filter cartridges CART-D, CART-C and CART-E)
    Precoat material (for filter cartridges CART-D, CART-C and CART-E)
    • From Ø 250 mm to Ø 10 in.
    • From Ø 400 mm to Ø 16 in.

    An adapter from Ø 355 mm to 14 in. is not necessary
    Frequency inverter
    • VFD-2.2 (2,2 kW / 3 HP)
    • VFD-4 (4 kW / 5 HP)
    • VFD-5.5 (5,5 kW / 7.5 HP)
    • VFD-11 (11 kW / 15 HP)

    Refer to Table 1 for selection of frequency inverter (in the Product Data Sheet document at 'Downloads')

    Scope of supply

    Fan-filter unit - Mounting hardware - ControlPro (Panel + HMI) Not included: Filter cartridges - Frequency inverter

    Order information


    Shipping data

    Harmonized Tariff Code
    Country of origin

    MDB-Compact Brochure EN


    MDB-Compact Product Data Sheet EN

    Product data sheet

    MDB-Compact Manual EN


    MDB-Compact CE Declaration EN


    The MDB-4 Compact is in accordance with the following directives:

    • Machine Directive 2006/42 EC
    • EMC 2014/30 EU
    • LVD 2014/35 EU
    • ErP Directive 2009/125 EC
    rohs logo.png

    Directive 2011/65/EC (RoHS) valid as of 8 June 2011


    Ref. UL-508A

    • 460V/3ph/60Hz (USA)

    • 575V/3ph/60Hz (Canada)


    W3 compliant:

    MDB-Compact with filter cartridges CART-PTFE/10 or CART-PTFE/15

    amca logo

    Plymovent certifies that the products shown herein are licensed to bear the AMCA Seal. The ratings shown comply with the requirements of the AMCA Certified Ratings Program.

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