Frequently asked questions

Four related product families: cleanroom turnkey projects (PUF partitions, doors, air handling units, ducting, terminal boxes, control panels and epoxy flooring), cleanroom equipment (air showers, laminar air flow units, pass boxes, biosafety cabinets, dispensing and sampling booths, garment cubicles), HVAC air filters (pre, fine, HEPA, super HEPA, mini pleat, activated carbon, combination, pocket and bag filters), and modular operation theatres. We also take on HVAC projects, cleanroom validation and plant maintenance.

We manufacture them. We are one of the few companies internationally to manufacture both cleanroom equipment and the air filters that go into it, from premises of about 12,000 sq ft near Mumbai. In practice this is why the filters inside our air showers, pass boxes and laminar flow units are our own, and why replacement elements can be made in sizes that are no longer generally available.

Pharmaceutical and biotechnology, chemical research laboratories, electronics manufacturing, semiconductor production, food processing, and hospitals and healthcare. Pharmaceutical, biotechnology and healthcare are the three segments the company was built around.

Both. Our in-house capability covers design, engineering, construction and manufacturing, so a project can be taken on as a single turnkey contract. Where a facility only needs the envelope, or only needs equipment or replacement filters, those can be supplied on their own.

Yes. Filters and cleanroom equipment are manufactured in standard and customised sizes. For filters, the standard size tables on each product page are the sizes held as standard; other dimensions are made to order, and refill types are manufactured to customer requirement.

Use the enquiry form on this site, call +91 89560 50201 or +91 89560 50209, or email marketing@mapfil.com. For a filter enquiry it helps to have the size, quantity, required efficiency or grade, and the frame material. For a cleanroom or HVAC project, the room layout and the target ISO class are the useful starting points.

The corporate office is in Kopar Khairane, Mahape, in the TTC Industrial Area of Navi Mumbai (Thane district, Maharashtra 400705). There are two manufacturing units in Palghar district, at Naigaon East and at Vasai East. Full addresses are on the contact page.

HEPA stands for High Efficiency Particulate Air. For a filter to qualify as HEPA it must remove 99.97% of particles greater than or equal to 0.3 micron. That specific figure and particle size is the definition, not a marketing claim. HEPA filters correspond to grades H13 and H14 of EN1822 and support ISO Class 5 operation as per ISO 14644.

The difference is how the filter seals to its housing, not how the media performs. A gasket seal uses a compression gasket; a gel seal uses a channel of gel into which a knife edge on the housing sits. In a terminal filter position, air leaking around the frame is often a larger contributor of contamination than air passing through the media, so a gel seal is specified where that bypass path has to be eliminated, such as in semiconductor fabrication.

Economics, mainly. A pre filter captures coarse dust, pollen and lint that would otherwise be removed by the HEPA filter downstream. Since a washable pre filter costs a fraction of a HEPA and can be cleaned and reused, letting it absorb the coarse load extends the life of the expensive final filter and lowers total maintenance cost. Skipping the cheap stage makes the expensive stage a consumable.

How the air is exhausted. A Class II A2 cabinet recirculates most of its air within the cabinet after HEPA filtration and exhausts a portion. A Class II B2 cabinet is total exhaust: all air is HEPA filtered and discharged through the facility ventilation, with a double wall plenum and a pressure balancing system. If volatile chemicals, toxic compounds or carcinogens are being handled, B2 is the correct specification, because recirculating that air is not acceptable regardless of filter grade.

A static pass box is an interlocked chamber: the door interlock prevents both sides being open at once, so material can be transferred without opening a path between areas. A dynamic pass box adds HEPA filtered supply air inside the chamber, so the material itself is cleaned in transit. Dynamic units are available in 2 way and 3 way configurations for layouts with more than one transfer point.

The direction the air moves across the work area. Horizontal units push filtered air across the work surface toward the operator. Vertical units push it downward. Both hold ISO Class 5 at 0.45 +/- 0.05 m/s; the choice depends on whether it is acceptable for air that has passed over the product to then reach the operator, which is why vertical flow is usual where the operator must not sit downstream of the work.

That is the reason for building it modular. The panel construction lets a theatre be expanded or reconfigured as a hospital's operational needs change, rather than requiring demolition and rebuilding.