Real-life examples and practical experiences.

Pro­tec­tive ven­ti­la­ti­on of mo­bi­le ma­chi­nes is a high­ly di­ver­se chal­len­ge that does not know any stan­dard so­lu­ti­on.

Each work en­vi­ron­ment is dif­fe­rent and is cha­rac­te­ri­zed by dif­fe­rent con­ta­mi­na­ti­ons. That is way the pro­tec­tion of your em­ployees from dust, ga­ses and other dan­ge­rous en­vi­ron­men­tal in­flu­en­ces nee­ds to be tailo­red pre­cise­ly to the re­spec­tive si­tua­ti­on. SEKA has the ex­pe­ri­ence de­ri­ved from count­less ap­p­li­ca­ti­ons.

Practical experiences

We would like to provide you with real-life examples demonstrating how we have solved typical challenges.


Solid waste landfills:
Foul odors are not the real problem

Not only foul odors are ty­pi­cal of mu­ni­ci­pal so­lid was­te land­fills. They are also cha­rac­te­ri­zed by high con­cen­tra­ti­ons of spo­res, fun­gi and vi­ru­s­es. An ad­di­tio­nal pro­blem is that pa­per, plas­tic foils and other sub­stan­ces can clog the air in­lets of the pro­tec­tive ven­ti­la­ti­on sys­tem.

SEKA uses an es­pe­cial­ly lar­ge-sca­le air in­let roo­ted over the roof of the ca­bin. It works with a re­la­tive­ly low air­flow which prevents that so­lid was­tes can clog the in­let gril­le of the pro­tec­tive ven­ti­la­ti­on sys­tem.

Con­side­ring the high con­tent of air­bor­ne fi­b­res and par­ti­cles in the am­bi­ent air we re­com­mend a me­di­um-si­zed S8.35 HEPA filter con­for­ming to HEPA filter class H14. Such fil­ters are also re­com­men­ded for as­be­stos. For fil­te­ring ga­ses and odors we re­com­mend an activated carbon filter, mo­del S8.4C with a volume of 4.0 kg.


Remediation of contaminated sites:
Targeted solution for any application

The re­me­dia­ti­on of con­ta­mi­na­ted sites can re­sult in an at­mo­s­phe­re con­tai­ning a va­rie­ty of pol­lut­ants. Be­si­des the high dust con­tent, this es­pe­cial­ly in­clu­des va­rious ty­pes of ga­ses.

It would be ir­re­s­pon­si­ble to give a blan­ket re­com­men­da­ti­on for pro­tec­tive ven­ti­la­ti­on of the ca­bin of a ma­chi­ne wi­thout any in­di­vi­du­al as­sess­ment of the exis­ting ex­po­sure. De­pen­ding on the si­tua­ti­on, howe­ver, of­fer the fol­lo­wing two ap­proa­ches can be sug­gested:

Use of a S8.25 HEPA fil­ter con­for­ming to the filter class HEPA H14 in com­bi­na­ti­on with alarge activated carbon filter with a mass of 9.0 kg. Such a lar­ge fil­ter of­fers suf­fi­ci­ent re­lia­bi­li­ty even in the case of un­ex­pec­ted “hot spots”. Sin­ce the most sui­ta­ble type of coal lar­ge­ly de­pends on the ap­p­li­ca­ti­on, we of­fer our con­sul­tan­cy ser­vices.

Use of a S8.25 HEPA fil­ter con­for­ming the filter class HEPA H14 in com­bi­na­ti­on with two different activated carbon filters equip­ped with different types of coal. This com­bi­na­ti­on is es­pe­cial­ly re­com­men­ded in com­bi­na­ti­on with sub­stan­ces with a boi­ling point be­low 65°C. We sug­gest a com­bi­na­ti­on of an ABEK fil­ter and an AX fil­ter.


Hazardous waste sites:
Measures against unknown contaminations

In ha­zar­dous was­te sites an es­pe­cial­ly high le­vel of dan­ge­rous sub­stan­ces must be ex­pec­ted. Of­ten it is not pos­si­ble to pre­cise­ly de­ter­mi­ne the ex­act com­po­si­ti­on of the am­bi­ent air. The­re might be sub­stan­ces that bind oxy­gen or ex­pel air. Even rem­nants of war­fa­re must be ex­pec­ted.

In ad­di­ti­on, ha­zar­dous was­te sites are of­ten en­clo­sed with a tent or hall. Alt­hough this re­du­ces en­vi­ron­men­tal pol­lu­ti­on, the pol­lutant con­cen­tra­ti­on in the in­te­ri­or will even be hig­her. In ad­di­ti­on, the­re may also be a dan­ge­rous drop in the oxy­gen con­tent.

Ac­tiva­ted car­bon fil­ters are usual­ly not suf­fi­ci­ent to ful­ly fil­ter out the con­ta­mi­na­ti­ons to be ex­pec­ted in such ha­zar­dous was­te sites. For this re­a­son, SEKA re­com­mends the use of a compressed air system (ADLA). It works com­ple­te­ly in­de­pen­dent from the am­bi­ent air and re­pres­ents the only so­lu­ti­on to ful­ly pro­tect the ope­ra­tor of a con­struc­tion ma­chi­ne from any health ha­zards. For tem­pora­ry use, com­pres­sed air sys­tem can also be ren­ted.


Com­bi­na­ti­on of dust, fi­b­res and even as­be­stos

Ty­pi­cal of de­mo­li­ti­on work is a high le­vel of con­ta­mi­na­ti­on of the am­bi­ent air with ce­ment dust and fi­b­res. In ad­di­ti­on, the pre­sence of ma­te­ri­als con­tai­ning as­be­stos must be ex­pec­ted.

For de­mo­li­ti­on work, SEKA re­com­mends the use of ex­tra lar­ge dust fil­ters con­for­ming tofilter class ULPA U15. This fil­ter class is two clas­ses hig­her than class H13 fil­ters and is able to re­mo­ve prac­tical­ly all par­ti­cles from the air. In the case of am­bi­ent air con­tai­ningasbestos, the Pro­fes­sio­nal As­so­cia­ti­on ge­ne­ral­ly de­man­ds the use of a class H filter ac­cor­ding to EN­60335 (dust re­mo­ving de­vices). Using a class U15 fil­ter will con­form to such de­man­ds or even sur­pass it.


Biological does not mean safe

The bio­lo­gi­cal pro­ces­ses ta­king place in com­pos­ting plants usual­ly do not only pro­du­ce foul odors. They of­ten also re­sult in dan­ge­rous con­cen­tra­ti­ons of am­mon. In ad­di­ti­on, high con­cen­tra­ti­ons of fun­gi, spo­res and fine dust are part of the sur­roun­ding at­mo­s­phe­re.

For pro­tec­tive ven­ti­la­ti­on sys­tems to be used for com­pos­ting sites, SEKA re­com­mends the use of a me­di­um size S8.35 dust fil­ter con­for­ming to filter class HEPA H14 in com­bi­na­ti­on with an activated carbon filter with a mass of 4.0 kg of K type coal which is es­pe­cial­ly sui­ted to ab­sorb am­mon.


Asbestos disposal:
Strong measures against critical fibres

The dis­po­sal of as­be­stos does not only come with high con­cen­tra­ti­ons of dust. The fi­b­res con­tai­ned in the en­vi­ron­ment are also es­pe­cial­ly cri­ti­cal, be­cau­se they are con­side­red to be an ex­tre­me­ly car­ci­no­ge­nic health ha­zard.

For as­be­stos dis­po­sal, SEPA re­com­mends ex­tra lar­ge HEPA fil­ters con­for­ming to filter class ULPA U15. This fil­ter class is two le­vels above fil­ters ac­cor­ding to class H13 and is able to re­lia­bly re­mo­ve as­be­stos fi­b­res. Fil­ter class U15 de­fi­ni­te­ly conforms to the class H filters ac­cor­ding to EN­60335 (dust re­mo­ving de­vices) de­man­ded by the Pro­fes­sio­nal As­so­cia­ti­on.

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