Alsident Arms & Hoods
Large Range of Designs
Many Different Applications
Strong & Long Lasting
Fumair are UK agents for the complete range of extract arms and LEV equipment manufactured by Alsident System.
Alsident System extract arms are self-supporting with internal threaded stays and springs. This construction results in a point of extract which is easy to position to the source of the pollutant, and push out of the way when not in use. Unlike traditional fume hoods or enclosures an fume extract arm allows good all-round access to the work area.
Alsident LEV extraction systems
System Type Summary
All Alsident extraction arms are made of high-quality shock proof polypropylene and anodised aluminium. Threaded stays, springs and inner fixing are made of acid-resistant stainless steel ensuring long durability in aggressive environments. Joints are self-lubricating and maintenance-free.
Alsident fume extract arms are available in a large number of lengths, diameters and materials, including chemical resistant polypropylene and anti-static conductive polypropylene for use in ESD and ATEX environments.
As well as the extract arms, Fumair can supply and install the complete extract duct, fan and control system.
Chemical Resistant (CR)
The extraction arms of aluminium are suitable within working areas with no special demands as to chemical resistance or conductivity.
The difference between this material and the other materials is that the pipes are of anodised aluminium. The joints are of shatterproof polypropylene (PP) and available in 3 different colours depending on the system.
The hoods for the extraction arms in AL are with a stub pipe of anodised aluminum. The material of the hoods are generally anodised or powder coated aluminum and vacuum-moulded transparent PETG-plastic.
Chemical Resistant (CR)
The chemical resistant extraction arms are for the use in aggressive working environments with special demands to chemical resistance as a result of the work of removing i.e. aggressive chemical fumes.
Unlike the other variants, the pipes of the chemical resistant extraction arms are made of white shatterproof polypropylene (PP) which is the same material as for the joints. Polypropylene (PP) is a very resistant plastic resistant to many different aggressive chemicals.The pipes are of polypropylene (PP) and the inner parts are of acid-proof stainless steel (AISI 316L) providing this material long durability in aggressive working environments.
The hoods for the chemical resistant extraction arm are with a stub pipe also made of chemical resistant polypropylene (PP). The material of the hoods are powder coated aluminium or vacuum-moulded polypropylene (PP).
Antistatic (AS) - System 50
The antistatic System 50 is different from our other systems in material and application as to approvals. The extraction arms have tubes of TCP treated aluminium and joints made of shatterproof, conductive polypropylene (PP).
System 50 antistatic is tested and approved for use in ESD areas according to IEC 61430-5-1. Therefore, they have an earthing wire with 1 MW resistance
See test report from Delta.
The stub pipe for the antistatic extraction arm in System 50 is made of TCP treated aluminium tube and is delivered together with the hood. The hoods are made of TCP treated aluminium or vacuum-moulded conductive polypropylene (PP).
The antistatic extraction arm in System 75 and System 100 are very different from the arms of other materials, because both tubes and joints are made of shatterproof conductive polypropylene (PP).
System 75 AS and System 100 AS have both been tested and approved for use in EX areas (ATEX) according to IEC 13463-1 and IEC 61430-4-1 and are therefore labelled: EX II 1 GD
Therefore, these extraction arms are delivered with an earthing wire. Since they have also been tested and approved for use in ESD areas according to IEC 61430-5-1, we also enclose an earthing wire with 1MW resistance.
See Test reports with EX approval from the Danish Technological Institute.
See Test reports with ESD approval from Delta.
The stub pipe for the antistatic extraction arm is made of conductive polypropylene (PP) and is delivered together with the hood. The hoods are made of TCP treated aluminium or vacuum-moulded conductive polypropylene (PP).
Antistatic (AS) - System 75, 100
Do I need an Airflow Monitor?
HSE’s LEV FAQ section of their website states “there isn’t a specific legal requirement to have airflow indicators fitted to an extraction. But as an employer you do by law have to make sure that your LEV system keeps working properly”.
Other than testing before using and LEV you need some form of reliable indicator that the Lev is functioning correctly, as Employee's have a duty to report any defects "forthwith" to the employer. There needs to be some reliable method to inform the employee of a defect such as a blockage or broken duct in the system.
This is where some form of airflow indicator is needed.
You can download a very useful article regarding Airflow monitors and the law here courtesy of Bill Cassells of Oxyl8 Ltd, who trains LEV inspectors to the P600 standards for BoHS.