The company HOBRA-Školník is a significant European manufacturer of solutions in the areas of filtration and insulation. The first HOBRA branded insulating products saw the light 85 years ago and the company is engaged in filtration for more than 65 years. Convince yourselves about the outstanding quality of insulation and filtration products developed and manufactured using the state of the art technology and strict quality standards.
How is the filtersheet put in the filter properly - which of the sides is the inlet and which is the outlet?
The inlet side is the coarser one and the outlet side is the finer one, with the screen imprint and the firm’s logo; for more information, please see the HOBRAFILT product section.
What is the recommended pressure during filtration over the filtersheets?
The pressure varies and depends on the filtersheet type; for more information, please see the HOBRAFILT product section.
Can the filtersheets be regenerated?
Yes, they can - see the instructions on the HOBRAFILT section pages.
How should the filtersheets be disposed of?
Either as municipal waste or composted, unless you have filtered hazardous waste. In that case, respect the recommendations for the particular hazardous waste; more detailed information is provided on the material safety data sheet.
How long and with how much water should the sheets be flushed on first packing?
Sheets should be washed for approximately 10 - 15 minutes until clear, tasteless water flows out; for more information, please see the HOBRAFILT section.
In what manner and for how long should the sheets be sterilized?
The sheets can be sterilized either with hot water until water at a temperature of 85 - 90°C flows from the filter outlet side or with steam of 121°C, or chemically; for more information, please see the HOBRAFILT section.
How is the paper aftertaste removed from the sheets?
Flush the sheets properly at the beginning of filtration. The sheets should be washed for approximately 10 - 15 minutes until clear, tasteless water flows out; for more information, please see the HOBRAFILT section.
What quantity of filtrate will I get from a certain number of sheets before they become fouled completely?
It's impossible to answer in general as it depends on many circumstances; for instance, filtrate turbidity, viscosity, proper sheet type, etc.
Do the sheets contain asbestos, or not - does your firm have a health certificate?
Certainly not! Our firm does not use asbestos; it has been banned by the General Health Officer of the Czech Republic for health reasons. No health certificate needs to be submitted in EU member states. We have the corresponding “Certificate of Health Conformity” available and in countries outside the EU our business representatives have certificates conforming to the laws of the particular country.
Which of the filtersheets features the highest flow-rate and dirt capture efficiency?
The sheets with the highest flow-rates are those with the highest numbers in their identification and vice versa; for more information, please see the HOBRAFILT section.
How are the filtersheets packaged?
As a standard, the sheets are packaged in packs, cardboard boxes or on pallets; for individual packaging types, see the HOBRAFILT section.
Are your filtersheets charged? Are you able to supply qualitative parameters for every single charge?
Yes, the sheets are identified completely. Information on inspection measurement results, who manufactured the sheet/charge and when, can be found for every charge.
Do your sheets contain heavy metals?
No.
Where can your filtersheets be purchased?
The sheets can be purchased directly at our plant or from our retailers. Please find your nearest retailer with the help of our Sales Department or write to hobra@hobra.cz.