Replacing the HEPA H14 / ULPA lters
Pre-requisites
• The operative responsible for replacing the lter is kept up-to-date with the exhaustive list of products handled in
the fume hood by the user so that the correct EPI can be used
• The laboratory is empty when the operation is carried out
• The laboratory is ventilated by mechanical or natural means while the operation is carried out
Minimum protective equipment
• One-piece overall + overshoes + bouffant cap
• Laboratory gloves (latex or nitrile)
• Protective glasses
• Breathing mask with particle lter (P3)
Notice: additional equipment could be required.
This procedure is applicable to HEPA/ULPA lters located at the bottom of the ltration columns and designed to trap
powders handled inside the device enclosure.
Strict chronological order to follow:
1- Switch on the device fan
2- Carefully spray the bottom surface of the HEPA/ULPA lter
(paint with NON FLAMMABLE propellent), to be done inside the enclosure
3- Allow at least 5 minutes with the fan running for the spray to dry
4- Shut down and unplug the device and disconnect the fan module power supply cable and the sampling tubes from the
sampling area (if installed)
5- Carefully remove the molecular lter(s) (if present) and the fan module
6- Carefully unwrap the new HEPA/ULPA lter
Keep the plastic lm and cardboard box so that you can use it later to pack up the used lter
Lay out the lm on a at surface in the immediate vicinity of the operation so that it is at the ready
7- Carefully remove the used HEPA/ULPA lter and immediately place it contaminated-side down onto the plastic lm
8- Clean the lter housing and the enclosure (using water + surfactant)
9- Package up the used lter + contaminated equipment
Seal the plastic lm tightly
10- Place the sealed package in the box the new carbon lter came in, then seal it using adhesive tape, clearly write «used
lter» on the packaging.
Have the lter disposed of via a suitable disposal process in accordance with the applicable regulations.
To nd out more, please contact your usual advisor.
11- Fit the new HEPA/ULPA lter, main molecular lter (if present) and the fan module, followed by the backup molecular
lter (if present). Make sure that all the column components
12- Reconnect the device’s various cables and hoses, switc h the device back on and check the air speed using the
anemometer calibration procedure via the administrator interface
Type AS
For organic vapors
Type BE +
Multi-application for acid and organic vapors
Type K
For ammonia vapors
Type F
For formaldehyde vapors
HEPA H14
For powders
ULPA
For powders
The table below summarises the different types of carbon lters that Erlab® offers along with their elds of application.
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