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MANN+HUMMEL Industrial Filters 

3

NLG 

2.  Safety

2.1  Warning instructions and symbols

All instructions marked with this sym-

bol must be observed closely in order 

to avoid damage to or the destruction 

of filter components.

This  symbol  indicates  that  special 

attention must be paid to these instruc-

tions in order to ensure trouble-free, 

economical operation.

2.2  Intended use

The filter may only be maintained by quali

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fied, authorised personnel.
The filter is constructed to the state-of-the-

art and in accordance with recognised safety 

specifications. However, the functional safety 

of downstream assemblies may be affected 

if:

– the filter is used incorrectly or for a purpose 

for which it was not intended,

– the operating conditions change,

-  modifications are made without consulting 

the manufacturer

– necessary maintenance and repair work is 

not performed.

Use the filter only if in perfect condition and 

in accordance with the respective technical 

specifications, observing correct procedures 

regarding safety and danger, and in compli-

ance with the operating instructions. In par-

ticular, malfunctions that may affect safety 

must be eliminated immediately.
The  filter  is  designed  exclusively  for  the 

mechanical filtration of air. Other applications, 

e.g. filtering aggressive, combustible and/or 

explosive materials is considered incorrect 

use. In this case, the manufacturer/supplier 

will reject all liability in event of resultant dam-

age.

Intended use also includes observing operat-

ing instructions and complying with inspection 

and maintenance requirements.

It is imperative for the operator to check the 

filter regularly for externally visible signs of 

damage or faults (when servicing at the lat-

est).

All labelling and identification marks on the 

filter must be legible at all times.

3.  Functional description

The NLG series is a air cleaner designed for 

cleaning intake air induced by all types of 

machine (e.g. motors, compressors, fans). 

One and two-stage versions (Piclon) are 

available.

With a two-stage filter, the induced air is cir

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culated in the filter housing by guide vanes. 

The centrifugal forces generated here force 

heavy dust particles outwards against the 

housing wall and discharge them via the dust 

discharge valve in the lower section of the 

housing (1st filter stage).This option is par

-

ticularly suited to applications with high levels 

of dust.
The induced air is cleaned and reaches the 

air outlet spigot through the main element 

(second filtering stage) and the downstream 

secondary element (optional). The specified 

dimensions mean that the filter elements seal 

radially to the clean-air spigot on the hous-

ing.

With the one-stage filter (Pico), the induced 

air will be cleaned directly by the main ele-

ment.

Summary of Contents for NLG Series

Page 1: ...19 611 28 017 Version 0806 NLG series Operating Instructions ...

Page 2: ...personnel to familiarize them selves with the NLG series and to use it in the various application areas for which it was designed The operating instructions contain important information on operating the components safely correctly and economically These instructions must be followed in order to avoid danger reduce repair costs and down times and increase the reliability and working life of your m...

Page 3: ... aggressive combustible and or explosive materials is considered incorrect use In this case the manufacturer supplier will reject all liability in event of resultant dam age Intended use also includes observing operat ing instructions and complying with inspection and maintenance requirements It is imperative for the operator to check the filter regularly for externally visible signs of damage or ...

Page 4: ...filters Pico as a water extractor Wire clamp latches connect the lower hous ing section with the middle housing section The housing cover is screwed to the middle section Do not untighten these screws As an option seals can be installed on the non filtered air side as hose proof protection However only limited water passage is possible The intake neck can also be fitted with a rain cap as an optio...

Page 5: ...ed on the main element 5 times or after 2 years at the latest Dust discharge valve if available Check for damage function and clean Depending on the dust concentra tion in the environment e g daily if large amounts of dust Plastic housing Check for damage and cracks When performing maintenance on the filter Maintenance display switch on clean air tube Check function 1 Annually 1 In order to attain...

Page 6: ...2 2 Cleaning the main element Never wash brush or knock the main element Only blow it out in cases of emergency However no dust may touch the inner side of the main ele ment In cases of emergency the main ele ment can be cleaned as described below Because minimal damage is often very difficult to detect or cannot be detected at all we always recom mend using new elements to protect the motor or eq...

Page 7: ...r casing Carefully insert the main element into the housing open end first Position lower housing section observe position of the dust discharge valve see also Section 4 Position the wire clamp latches in the groove on the flange on the middle housing section and tighten same as Fig 1 but in reverse 5 3 Servicing the secondary element The secondary element must be replaced every 5th maintenance se...

Page 8: ... at least one replace ment element in stock for each filter element required 7 Disposal of components Figure 6 Draining the valve Component Material Disposal Main element Filter paper Polyurethane foam PP T20 Dispose of as per local regulations Secondary element Filter paper fleece depending on model Polyurethane foam glue PA 6 GF 30 Dispose of as per local regulations Housing cover PP GF30 Plasti...

Page 9: ...l lines and connections Dust on clean air end in and downstream of filter Main element defective Remove dust carefully inspect main element and if necessary replace together with secondary element see section 5 Incorrect maintenance Remove dust carefully perform main tenance as per section 5 Housing not closed correctly Remove dust carefully check main element housing and connections for damage re...

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