Norgren Filter Contents User Manual

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

Filter Contents

Filter Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ALE-Filter

General Purpose Filters . . . . . . . . . . . . . . . . . . . . . . . .ALE-1-1

Oil Removal (Coalescing) Filters . . . . . . . . . . . . . . . . . .ALE-2-1

Oil Vapor Removal (Adsorbing) Filters . . . . . . . . . . . . .ALE-3-1

Filters

General Purpose Filters, Oil
Removal (Coalescing) Filters, Oil
Vapor Removal (Adsorbing)
Filters, and Compressed Air
Membrane Dryers

Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

GENERAL PURPOSE FILTER

COALESCING FILTER

1.1 GENERAL OVERVIEW

Three main types of filters exist: The general
purpose filter for water and particles, the coalescing
oil removal filter for oil aerosols and the activated
carbon filter for the removal of oil vapors.

The general purpose filter is used for most
filter applications and is available from 1/8" to 2"
pipe sizes. Uses are main headers, branch lines,
tools, cylinders, valves and valve circuits, air
agitators etc. Oil removal filters are used where very
clean, oil-free air is required, such as for the supply
to fluidic devices, instrumentation, air gauging
equipment and air bearings.

Activated Carbon filters are used for
systems where the oil vapors in the air are not
acceptable; such as instrumentation and paint
spraying.

1.1.1 How Do General Purpose Filters Work?

The dirt and moisture-laden air enters the inlet port
and is directed into the louvers which centrifugally
separate the entrained liquids and dirt which fall to
the bottom of the bowl. Near the bottom of the bowl
a baffle creates a quiet zone, preventing the
turbulent air re-entraining the contaminants. The air,
now free of water droplets and large dirt particles,
passes through the filter element which removes
small dirt particles. Solid particles eventually plug
the element necessitating replacement.

1.1.2 How Do Oil Removal Filters Work?

Air enters the filter and passes through the
element from inside to outside, where oil aerosols
impinge on the borosilicate micro-fibers and are
coalesced into larger drops. The drops are carried
through the element until they reach the outer
porous sock. The outer sock, because of its cellular
construction, retains these liquids and allows them
to drain by gravity to the bottom of the bowl.

Solid partilces are retained in the element
and cause the pressure drop to slowly increase
throught the working life of the element. When the
pressure drop across the element reaches 10 psid,
the service life indicator on top of the filter will
show more red than green and the element should
be replaced.

1.1.3 How do Vapor removal Filters Work?

Carbon filters are used to remove oil vapors and
odors. The activated carbon has a porous structure
which results in a large surface area. The oil vapors
are attracted and adhere to this surface. There is
usually a small sintered medium included in an
activated carbon element to prevent the carbon
particles from migrating downstream. The carbon
filter reduces the maximum oil content of air leaving
the filter to 0.003ppm at 70°F, i.e. To ISO 8573 class

1.7.1. If protected upstream by general and oil
removal filters life is between 400 and 1000 hours.

1.1.4 Why use a Pre-Filter?

A pre-filter is simply a general purpose filter placed
upstream of a higher grade filter to remove the
majority of the water and larger particle
contaminants and thus lengthen the life of the higher
grade filter element.

A 5 micron pre-filter should always be used

ahead of an oil removal filter.

An oil removal (coalescing) filter must be

used ahead of a vapor removal adsorbing filter.

1.2 AIR QUALITY

1.2.1 What is ISO 8573?
(See ALE-1-G for specification)

This is an international standard on air quality. It
covers compressed air for general industrial use.

The air quality is specified using a 3 digit

code expressing the remaining content of a specific
contaminant after the filter (or dryer).

1.2.2 Air Classes for Norgren Filters:

Particulate filters condition compressed air to
different degrees, dependent on the micron rating of
the filter. The finer filter, 5 µm, will achieve ISO 8573
class 3.7. or class 3. Applying a 40 µm filter will
result in ISO 8573 class 5.7. or class 5 air.

Coalescing filters improve the quality of

downstream air to ISO 8573 class 1.7.2, the particle
size is reduced down to 0.01µm, with a remaining
oil content of less than 0.01ppm. Coalescing filters
cannot remove oil which is in the vapor state in the
supply air. One way to remove vapor is to reduce the
temperature of the air flow allowing the vapor to
condense, alternatively remove the vapor chemically
using an activated carbon filter.

Bowl
Baffle

Bowl

Service indicator
(optional)

Body

Louvre

Centre post
Element

Metal bowl
sight glass

Collected
condensate

Drain

Service indicator

Body

Element
Outer sock

Metal bowl
sight glass

Collected
condensate

Drain

Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

Figure 1. (See “Rating Filter Elements and ISO
Standard 8573-1” in this section.
RECOMMENDED FILTRATION LEVELS.

Application

Typical Quality Classes

Oil Dirt
Air agitation 1 3
Air bearings 2 2
Air gauging 2 2
Air motors 4 4
Brick and glass machines 5 4
Cleaning of machine parts 3 4
Construction 4 5
Conveying, granular products 2 4
Conveying, powder products 1 3
Fluidics, power circuits 2 5
Fluidics, sensors 2 3
Foundry machines 4 5
Food and beverages 1 1
Hand operated air tools 5 5
Machine tools 5 4
Mining 5 5
Micro-electronics manufacture 1 1
Packaging and textile machines5 3
Photographic film processing 1 2
Pneumatic cylinders 3 5
Pneumatic tools 5 4
Pneumatic tools (high speed) 4 3
Process control instruments 2 3
Paint spraying 1 1
Sand Blasting 4 5
Welding macines 5 5
General Workshop air 5 4

1.2.3 What Micron Ratings are Available?

The standard Norgren general purpose elements are
40 and 5 microns, with 40 microns being suitable
for most industrial applications. Certain industries
have 25 or 75 micron as a standard and some
product ranges have these options available.

For a given element size, the smaller the
micron rating the higher the pressure drop across
the filter. The service life between cleaning is also
less for the smaller micron filters, as small holes
plug more quickly than bigger holes.

1.2.4 How do Service Life Indicators Work?

The service life (pressure drop) indicator found on
top of coalescing or general purpose filters is green
when the filter is new. As a pressure differential
develops across the filter element with use, a spring
biased red outer sleeve is pushed up. When more
red is visible than green, then the pressure
differential across the element is in excess of 10 psi
(0.7 bar) and the element should be replaced.

1.2.5 When does the Carbon Pack Indicator Turn
Pink?

The white ring around the base of the vapor
removal carbon pack turns pink in the presence of
liquid oil. Therefore if the ring turns pink the
coalescing filter is passing liquid oil and needs
replacing. If this occurs soon after the filter has
been installed then it usually indicates a seal failure
in the coalescing filter. Remember that visual
detection is a not a substitute for scheduled
maintenance.

1.2.6 How Long does an Element Last?

This depends entirely on the quality of the inlet air.
If it is very poor the elements will need replacing
more frequently.

In general, air service equipment should

be maintained annually. Use, quality of air and
condition at examination may indicate adjustment
of the maintenance interval.
The following guidelines can be given:
General Purpose Replace/maintain annually. The
Filter: element can lose 15% efficiency

each time it is cleaned. Elements
are low cost, so it is advisable to
replace them.

Coalescing: Evaluate after 12 months of

servicing. If the pressure drop
across the element exceeds 10
psig (0.7bar) then the element

requires changing.
Activated Carbon Should be changed every 1,000
Packs: hours usage or when odor is

detected. The life depends

significantly on ambient

temperature.

1.3 PLASTIC BOWLS

Norgren transparent plastic bowls are made from
polycarbonate. Some competitors use other
materials such as Grilamid.

Both these materials are extremely resilient and have
an excellent safety record. However these
transparent plastics will degrade when subjected to
excessive heat, solvents and some chemicals, which
can lead to crazing and finally bowl failure.

Over the last few years metal bowls and
guarded plastic bowls have become increasingly
popular driven by the emergence of guidelines
recommending the use of guards.

Some organizations have their own internal
standards which call for guarded plastic or metal
bowl and the general market trend is away from
plastic bowls in the 1/2” or above port size units.
This trend is reflected in our latest Excelon 74 and
Olympian Plus product ranges. Plastic bowls remain
the most common option for 1/4” and smaller units.

Never use polycarbonate bowls at
conditions which exceed the maximum rated
pressure and temperature of 150 psig (10 bar) and
125°F (50°C).

Certain chemicals, common in some oils
and solvents, can attack polycarbonate and cause
the bowl to burst. If the compressor intake is located
in an area containing incompatible vapors, these
contaminants can be drawn into the compressor and
conveyed to the bowl in the compressed air. This
can result in bowl failure.

Synthetic compressor oils may be drawn in
from the compressor and can also result in bowl
failure.

If doubt exists as to the compatibility of
certain fluids with polycarbonate, please contact
Applications Engineering.

Metal bowls should be used where
temperatures exceed 125°F (50°C) and/or pressures
exceed 150 psig (10 bar), or when materials are
present which are incompatible with polycarbonate.
Maximum rated operating conditions for metal
bowls depend on the range; check APC-104.

Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

1.4 DRAINS

1.4.1 Semi Automatic:

A semi-auto drain is one which operates when the
air-line is depressurized eg at the end of a shift. It is
a normally open two-way valve which is held closed
by 7-10 psig (0.7-0.8 bar). When the filter is
pressurized, the drain may be operated manually by
pushing the tube, which protrudes outside the bowl,
upwards.

1.4.2 Automatic:

An automatic drain is a two-way valve, which will
close when the system is pressurized. The drain
opens when the float rises due to accumulated liquid
and on depressurization.

1.4.3 Where should an Automatic Drain be Used?

Automatic Drains should be used where the filter
location may make servicing difficult, where filters
may be hidden from view and consequently be
overlooked or where equipment is in continual use.
Areas where large quantities of liquid may
accumulate over a short period of time should also
be equipped with auto-drain filters. High labor costs
for draining a large number of filters manually will
generally justify the use of auto-drains.

Machines which have been shut down for a
long period of time, such as over a weekend, can
draw slugs of water during start-up which can
overload a filter unless drained immediately. (This
situation can normally be handled by a drip leg
drain, see.)

Norgren float type automatic drains are
‘normally open’ type drains. During periods when
the air line pressure is shut off, the automatic drain
will open allowing liquids to drain rather than flood
the air line piping system. When re-pressurizing the
air line, the automatic drain valve will close when
pressure reaches approximately 10 psig (0.7bar).
This results in a flow through the drain to
atmosphere of about 1.77 scfm (0.84dm3/s) until
the valve automatically closes. (See 1.4.4 below.)

1.4.4 Where should a Low Flow Automatic Drain
be used?

In systems where the compressor capacity is
insufficient to close a number of standard auto
drains a ‘low flow’ drain is available which requires
only 0.5 scfm flow before closing. An ultra low flow
auto drain is also available. ‘Low flow’ drains have
less clearance around the valve for expelling
contaminants, so should only be used where the
standard unit cannot be used. ‘Low flow’ drains can
be identified by red plastic parts.

1.4.5 07 Automatic (spitter) Drain:

When a rapid increase in flow occurs through the
filter it results in the pressure above the drain’s
diaphragm being less than that below it. This
differential pressure causes the drain to
momentarily lift and ‘spit’ out the condensate
collected underneath the drain.

1.4.6 Where should a Drip Leg Drain be Used?

The drip leg drain is a system protection device.
Most compressed air distribution systems have
varying flows and/or are shut down at the end of a
working day. As the system cools, water in the
compressed air condenses and collects in the
distribution pipe work. This water will run along the
pipe work and settle at the low point(s). On start up
of the plant this water can be pushed under
pressure into the nearest device or process and
cause malfunction or damage.

By running a vertical pipe down from

these low points water will flow into the drip leg
drain where the automatic drain will expel it.

A filter screen within the drip leg drain

prevents particles interfering with the auto-drain
operation. A ball valve should be included above
the drip leg drain to allow for maintenance when
the system is running.

1.5 PERFORMANCE

1.5.1 Performance of General Purpose Filters

Filters have their flow measured in terms of the
pressure drop across them. As the flow increases
then the pressure drop also increases. These
pressure drops are energy losses in the system.

A well designed filter not only removes
water and particles efficiently, but also has a low
pressure drop at a given flow. The flow figures
quoted in Norgren catalogues for general purpose
filters are at a pressure drop of 5 psig (0.3 bar),
from a 100 psig (7 bar) inlet pressure.

Beware! not all competitors quote their
flows under the same conditions. If a higher inlet
pressure is used or a higher pressure drop is quoted
then the apparent flow will be higher. This does not
mean it is a better unit , simply that a different point
on the curve has been selected. Often the only way
to compare units is to test them under the same
laboratory conditions.

1.5.2 Performance of Coalescing Filters:

The maximum flow of an oil removal filter is usually
determined by the oil removal efficiency under
saturated conditions. In the catalog there are
maximum flows quoted ‘to maintain stated oil
removal characteristics.’ These are the steady state
flows which should not be exceeded to guarantee
that the oil in the outlet air remains below the

0.01ppm (parts per million) quoted. Cyclic or
pulsating flows will result in oil carry over, as will
elevated temperatures.

If a higher oil carry over is acceptable (or
there is no oil in the air-line) then higher flows are
achievable, and will be determined by the
‘acceptable’ pressure drop. For a new (dry) element
a flow which gives a pressure drop of less than 5
psid (0.3 bar) is recommended.

Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

1.6 FILTER SIZING

Selecting the proper size of filter for any
application should be done by determining the
maximum allowable pressure drop which can
be caused by the filter. The pressure drop can
be determined by referring to flow curves
provided by the manufacturer.

The flow characteristic curves should relate to
the fluid used, pressure, pipe port size and
micron rating of the filter element. Often the
parameters of pressure and flow are labeled in
metric and imperial units. The vertical axis is
the pressure drop across the filter, and the
horizontal axis is the air flow through the filter.
Each curved line represents the filter flow and
pressure drop characteristics for different
operating pressures.

Example Find the pressure drop across the
filter when operating at 90 psig (6.2 bar) and
when 50 scfm (24 dm

3

/s) is flowing through

the filter.
Answer Locate 50 scfm (24 dm3/s) on the

horizontal axis. Read up to the intersecting
point on the 90 psig (6.2 bar)operating curve.
The pressure drop (or ∆ p) is approximately .6
psid (.04bar) on the vertical axis on the left of
the graph. (See graph)

1.7 MEMBRANE DRYERS

For those applications where a low-pressure
dewpoint and low installation/operational cost
are required, Norgren provides an Excelon®
Membrane Dryer. This new product can
provide dewpoint suppression up to 80°F
(26°C) below ambient temperature and is
available with nominal flows of 2, 5, 10, 20,
and 30 scfm.

The Membrane Dryer is a variable dew point
suppression device constructed of an anodized
aluminum body with end caps. Inside the
body are bundles of special hollow fibers
(membranes) which are semi-permeable.
Moisture-laden air enters the fibers and water
vapor permeates through the walls to the
outside of the fibers. Dry air exits the device
through the outlet port. A small percentage of
dry air is diverted across the outside of the
fibers to sweep away and vent water vapor to
atmosphere.

This device provides variable dew point
suppression inversely related to flow. Lower
flows through a unit will increase contact time
with the membrane fibers, resulting in greater
dew point suppression. Higher flows will
result in a decreased level of dew point
suppression. Additionally, dew point
suppression is directly related to operating
pressure. Increasing the pressure applied will
result in a greater level of dew point
suppression. Therefore, it is always
recommend placing regulators downstream of
a membrane dryer to ensure the highest
pressure possible through the membrane dryer.

Model Port Outlet Inlet Purge Press.

Flow Flow Flow Drop

W07M2ANNNA 1/4" 2 scfm 2.2 scfm 0.2 scfm 0.4 psid
W72M2ANNNB 1/4" 5 scfm 5.6 scfm 0.6 scfm 0.32 psid
W72M2ANNNC 1/4" 10 scfm 11.2 scfm 1.2 scfm 0.90 psid
W74M4ANNND 1/2" 20 scfm 22.2 scfm 2.2 scfm 0.65 psid
W74M4ANNNE 1/2" 30 scfm 33.4 scfm 3.4 scfm 1.35 psid

Typical Flows for Membrane Dryers

bar d

psid

7

45

6

40
35

5

30

4

25

3

20

Pressure Drop

15

2

10

1

05

0

0

0
0 1020304050

Flow Characteristics

180

150

120

90

60

35

INLET
PRESSURE

20 40 60 80 100 120 140 160 180 200 220 scfm

psig
(bar)

(4.1)

(2.4)

60 70 80 90 100

Air Flow

(6.2

(8.3)

(10.4)

(12.5)

dm 3/s

Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

Malfunction Possible cause Remedy

Excessive pressure drop. Micron rating of element to small Use larger micron element size for application.

Filter element blocked. 1. Clean element (not

coalescing element). Note: Some residual

contamination will remain.

2. Replace with new element.

Flow requirement greater than Use larger filter.
filter capacity.

Dirt passing through filter. Element seals missing or Replace seal

defective. (N.B. Seals not 2. Tighten element.
required on some units).

Damaged element. Replace element.

Water passing through filter. Water level in bowl above Drain water.

baffle.

Flow capacity of filter Maintain flow within capacity
exceeded. of filter or change to filter

capable of handling desired flows.

Crazing of Polycarbonate bowl Bowl has been cleaned with Replace bowl.
or milky appearance. incompatible fluid. (Clean only in clean warm water and soap.)

Bowl is being used in an area Replace bowl.
containing fumes or vapors Eliminate source of problem or
incompatible with polycarbonate. convert from plastic to metal bowls.

Compressor oil vapor may be Replace bowl.
causing problem. Eliminate source of problem or

convert from plastic to metal bowls.

Air intake to compressor may Replace bowl.
contain fumes or vapor Eliminate source of problem or

incompatible with polycarbonate.convert from
plastic to metal bowls.

Water beyond the filter Inlet air has a high temperature Fit dryer, pre-cool air or fit

and as it cools downstream, filter immediately prior to application.
moisture condenses to water.

1.7 SIMPLE FILTER TROUBLESHOOTING

Rating Filter Elements and ISO Standard 8573-1

Littleton, CO USA Phone [phone] www.norgren.com

ALE-Filter

Absence of an Industrial Standard for Rating
Pneumatic Filter Elements

There is not an industry wide standard for establishing the micron
rating of pneumatic filter elements. Standards by various industry
associations, including the National Fluid Power Association
(NFPA) and Inter national Standard Organization (ISO), are in
discussion. In the absence of an industr y standard, some
manufacturers of pneumatic filters make claims concerning the
micron rating of their so called “standard” element which can not
be substantiated and are probably not valid.

Norgren’s Method of Rating and Testing
Pneumatic Filter Elements

Norgren particle removal filter elements are rated by the size of
the particle they will trap (i.e., a 40-micron element will remove
particles 40-microns and larger). Norgren tests filter elements by
using standard coarse and fine test dusts of known particle size
distribution. Coarse dust consists of 12% par ticles smaller than
5-microns; fine grain dust consists of 39% particles smaller than
5-microns.Test results show that a Norgren filter element rated at
40-microns actually removes over 98% of particles 5-microns and
larger.

How to Size a Filter Element

The downstream equipment being protected determines the
micron rating of the filter element. Industrial tools, such as air
hammers and drills, typically require only a 40-micron element.
Air operated instruments and small, high speed tools typically
require a 5-micron element. Always consult the equipment
manufacturer for filtration requirements.

Generally, the smaller the micron rating of the element,

● the higher the pressure drop across the filter,

● the shor ter the element ser vice life.

Therefore, the use of a 5-micron element where a 40-micron is
adequate penalizes the customer in increased pressure losses
and frequent down time for changing or cleaning the filter element.

ISO Standard 8573-1. Compressed Air
for General Use

Contaminant’s found in industrial compressed
air systems include solid particles, water, and
oil. ISO 8573-1:1991 provides a simple method
of classifying these contaminant’s.A quality
class required for a particular application can
be defined by listing, in order, the class
required for solids, water, and oil.

Examples:
Air of Quality Class 2.2.2 is filtered to 1µm
solid particle size, dried to -40°F (-40°C)
pressure dewpoint, and filtered to an oil
concentration of 0.1mg/m

3

.

Air of Quality Class 5.3.4 is filtered to 40µm
solid particle size, dried to -4°F (-20°C)
pressure dewpoint, and filtered to an oil
concentration of 5mg/m

3

.

When a class for a particular contaminant
solid, water, or oil is not specified, the number
designating the class is replaced with a
hyphen.

Example: Air of Quality Class 1.–.1 does not
specify the pressure dewpoint.

Table 1. Summary of ISO 8573-1:1991 Air
Quality Classes *

Solid Water Oil

Particle Maximum Maximum

Maximum Pressure Remaining

Quality Size Dewpoint Oil Content

Class µm °F (°C) mg/m

3

** (ppm)

1 0.1 -94 (-70) 0.01 (.0084)
2 1 -40 (-40) 0.1 (.084)
3 5 -4 (-20) 1 (.84)
4 15 38 (3) 5 (4.2)
5 40 45 (7) 25 (21)
6 — 50 (10) —

* See ISO standard 8573-1 for complete
information.
** At 1 bar absolute pressure.

Littleton, CO USA Phone [phone] www.norgren.com

ALE-1-1

Section 1

F07 Miniature General Purpose Filter 1/8" and 1/4" Ports . . . . . . . . .ALE-1-2

F72G Excelon General Purpose Filter 1/4" and 3/8" Ports . . . . . . . .ALE-1-4

F73G Excelon General Purpose Filter 1/4" to 1/2" Ports . . . . . . . . . .ALE-1-6

F74G Excelon General Purpose Filter 1/4" to 3/4" Ports . . . . . . . . . .ALE-1-8

F64G Olympian Plus General Purpose Filter 1/4" to 3/4" Ports . . . .ALE-1-10

F68G Olympian Plus General Purpose Filter 3/4" to 1-1/2" Ports . .ALE-1-12

F17 General Purpose Filter 3/4" to 1-1/2" Ports . . . . . . . . . . . . . . . .ALE-1-14

F18 General Purpose Filter 1-1/2" and 2" Ports . . . . . . . . . . . . . . . .ALE-1-16

General Purpose Filters

Compressed air, general
purpose filters are available in
modular or inline models, in port
sizes from 1/8" to 2".

F07

F72G

F73G F74G F64G

F17

F68

F

18

See Section ALE-24 for Accessories

Littleton, CO USA Phone [phone] www.norgren.com

F07

● Compact design

● Protects air operated devices by removing liquid and

solid contaminants

● Screw-on bowl reduces maintenance time

● Can be disassembled without the use of tools or

removal from the air line

Miniature Series 07 General Purpose Filter

1/8" and 1/4" Port Sizes

ALE-1-2

Port Size Model Numbers Flow scfm (dm3/s) * Weight lbs (kg)
1/8" F07-100-A1TA 19 (9) 0.28 (0.13)
1/4" F07-200-A1TA 24 (11.5) 0.28 (0.13)

Ordering Information. Models listed include PTF threads, automatic drain, transparent bowl and 5 µm element.

* Approximate flow at 90 psig (6.3 bar) inlet pressure and 5 psig (0.35 bar) pressure drop.

Alternative Models

Port Size Substitute
1/8" 1
1/4" 2

Threads Substitute
PTF A
ISO Rc taper B
ISO G parallel G

Option Substitute
Not applicable 0

Bowl Substitute
Transparent T
Metal M

Option Substitute
Not applicable 0

Element Substitute

5 µm 1
40 µm 3

Drain Substitute
Automatic A
Manual M

-

★★★★★

★

-

0★F 7

ISO Symbols

Auto Drain

Manual Drain

F07 General Purpose Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-1-3

Technical Data

Fluid: Compressed air
Maximum pressure:

Transparent bowl: 150 psig (10 bar)
Metal bowl: 250 psig (17 bar)

Operating temperature:*

Transparent bowl: -30° to 125°F (-34° to 50°C)
Metal bowl: -30° to 175°F (-34° to 80°C)

* Air supply must be dry enough to avoid ice formation at temperatures below

35°F (2°C)

Particle removal: 5 µm or 40 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5 (particulates)
Typical flow at 90 psig (6.3 bar) inlet pressure at 5 psig (0.35 bar) pressure drop:

1/8" Ports, 5 µm element: 19 scfm (9 dm3/s)
1/4" Ports, 5 µm element: 24 scfm (11.5 dm

3

/s)
Nominal bowl size: 1 fluid ounce (31 ml)
Drain connection: 1/8" pipe thread
Automatic drain operation:Spitter type drain operates momentarily when a rapid

change in air flow occurs or when the supply pressure is reduced.

Materials

Body: Zinc
Bowl

Transparent: Polycarbonate

Metal: Zinc (without sight glass)
Element: Sintered polypropylene
Elastomers: Neoprene & nitrile

For water extraction information please contact Applications Engineering.

Typical Performance Characteristics

FLOW CHARACTERISTICS

0 2 4 6 8 10 dm3/s

AIR FLOW

0 4 8 12 16 20 scfm

0.8

0.6

0.4

0.2

0

PRESSURE DROP

bar d

10

8

6

4

2

0

psid

PORT SIZE: 1/4"
5 µm ELEMENT

INLET PRESSURE: psig (bar)

25

(1.8)

60

(4.0)

40

(2.8)

90

(6.3)

120

(8)

180
(12)

150

(10)

0.157 (4) Dia †

0.5 (13) Deep †

n

n

1.45 (37)

0.91

(23)

0.73
(19)

0.91
(23)

1.63 (42)

6.07 (154) *

0.38 (10)

4.10 (104)

6.22 (158) **

4.25 (108)

0.38 (10)

** Minimum clearance to remove bowl.
† Mounting holes.

Service Kits

Item Type Part number
Service kit

5 µm element 3652-17
40 µm element 3652-18

Replacement drains

Manual 773-03
Automatic 3654-02

Service kit includes element, element gasket, and bowl o-ring.

All Dimensions in Inches (mm)

Manual Drai

Automatic Drai

See Section ALE-24 for Accessories

Littleton, CO USA Phone [phone] www.norgren.com

F72G

● Excelon design allows in-line or modular installation

● High efficiency water and particle removal

● Quick release bayonet bowl

● Highly visible, prismatic liquid level indicator lens on

metal bowls

● Optional service indicator turns from green to red

when the filter element needs to be replaced

● Optional electrical service indicator also available

● Modular installations with Excelon 72, 73, and 74

series can be made to suit particular applications

Excelon 72 General Purpose Filter

1/4" and 3/8" Port Sizes

ALE-1-4

Ordering Information. Models listed include PTF threads, automatic drain, long transparent bowl without guard, 40 µm element.Models do not

include the service life indicator.

† Typical flow with a 40µm element at 90 psig (6.3 bar) inlet pressure and 5 psig (0.35 bar) pressure drop.

Port Size Model Flow†scfm (dm3/s) Weight lb (kg)
1/4" F72G-2AN-AL3 55 (26) 1.15 (0.52)
3/8" F72G-3AN-AL3 55 (26) 1.15 (0.52)

F 7 2-G

★ ★

-

★★ ★ ★

Port Size Substitute
1/4" 2
3/8" 3

Threads Substitute
PTF A
ISO Rc taper B
ISO G parallel G

Drain Substitute
1/4 turn manual Q
Semi automatic S
Auto drain* A

Element Substitute
5 µm 1
25 µm 2
40 µm 3

Service Life Indicator Substitute
With (visual) D
With (electrical) E
Without N

Alternative Models

Bowl Substitute
Metal with liquid level indicator E
Transparent without guard L
Transparent with guard W

ISO Symbols

Auto Drain

Manual Drain

F72G General Purpose Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-1-5

Technical Data

Fluid: Compressed air
Maximum pressure:

Transparent bowl: 150 psig (10 bar)
Metal bowl:

Manual or semi automatic drain: 250 psig (17 bar)
Automatic drain: 150 psig (10 bar)

Operating temperature*:

Transparent bowl: -30° to 125°F (-34° to 50°C)
Metal bowl: -30° to 150°F (-34° to 65°C)

*

Air supply must be dry enough to avoid ice formation at temperatures below 35°F (2°C).

Particle removal: 5 µm, 25 µm or 40 µm.Within ISO 8573-1, Class 3 and Class 5
Typical flow at 90 psig (6.3 bar) inlet pressure and 5 psig (0.35 bar) pressure drop:

5 µm element: 47 scfm (22 dm

3

/s)

40 µm element: 55 scfm (26 dm3/s)
Manual drain connection:Will fit 1/8-27 and 1/8-28 pipe thread.
Semi automatic drain connection: Push on 5/16" (8 mm) ID tube
Semi automatic drain operating conditions (pressure operated):

Bowl pressure required to close drain: Greater than 1.5 psig (0.1 bar)

Bowl pressure required to open drain: Less than 1.5 psig (0.1 bar)

Minimum air flow required to close drain: 1 scfm (0.5 dm

3

/s)

Manual operation: Lift stem to drain bowl
Automatic drain connection:Will fit 1/8-27 and 1/8-28 pipe thread. - Flexible tube

with 3/16" (5mm) minimum I.D.can be connected to the automatic drain. Drain

may fail to operate if the tube I.D. is less than 3/16" (5mm). Avoid restrictions in

the tube.
Automatic drain operating conditions (float operated):

Bowl pressure required to close drain: Greater than 5 psig (0.35 bar)

Bowl pressure required to open drain: Less than 3 psig (0.2 bar)

Minimum air flow required to close drain: 0.2 scfm (0.1 dm

3

/s)

Manual operation: Depress pin inside drain outlet to drain bowl
Nominal bowl size:

Long bowl: 2.2 fluid ounce (65 ml)
Materials

Body: Zinc

Bowl

Transparent: Polycarbonate
Guard for transparent bowl:Zinc
Metal: Zinc

Metal bowl liquid level indicator lens:

Transparent nylon
Element: Sintered polypropylene
Elastomers: Neoprene and nitrile

An automatic drain is a two-way valve, which will close when the system is

pressurized.The drain opens when the float rises due to accumulated liquid
and on depressurization.

Typical Performance Characteristics

Service Kits

Item Type Part Number

Service kit Seal and gasket 4380-500

5 µm 5925-03

Elements 25 µm 5925-01

40 µm 5925-02

Liquid level lens kit Prismatic 4380-030

1/4 turn manual 619-50

Replacement drains Semi automatic 5379-RK

Automatic 4000-50R

Service kit includes drain and bowl o-rings.

† Minimum clearance required to remove bowl.

All Dimensions in Inches (mm)

PORT SIZE: 1/4"

psid

bar d

5 µm ELEMENT

0.8

10

0.6
8

6

0.4

PRESSURE DROP

4

0.2
2

0

0

0 20 40 60 80 100 120 scfm
0 10 20 30 40 50 dm3/s

PORT SIZE: 1/4"

psid

bar d

40 µm ELEMENT

0.8

10

0.6
8

6

0.4

PRESSURE DROP

4

0.2
2

0

0

0 20 40 60 80 100 120 scfm
0 10 20 30 40 50 dm3/s

FLOW CHARACTERISTICS

INLET PRESSURE - psig (bar g)

36

(2.5)58(4.0)91(6.3)

FLOW CHARACTERISTICS

INLET PRESSURE - psig (bar g)

36

(2.5)58(4.0)91(6.3)

116

(8.0)

AIR FLOW

AIR FLOW

116

(8.0)

150

(10.0)

150

(10.0)

1.97 (50)

1.89 (48)

(Top)

7.83 (199) †

Bowl with

1/4 Turn Manual Drain

5.83 (148)

9.84 (250) †

Bowl with

Semi auto Drain

7.48 (190)

7.52 (191) †

Bowl with

Automatic Drain

5.51 (140)

See Section ALE-24 for Accessories

Littleton, CO USA Phone [phone] www.norgren.com

F73G

● Excelon design allows in-line or modular installation

● Quick release bayonet bowl

● Highly visible, prismatic liquid level indicator lens

● Optional mechanical service indicator turns from

green to red when the filter element needs to be
replaced

● Optional electrical service indicator provides

electrical output when the filter element needs to be
replaced

● Modular installations with Excelon 72, 73, and 74

series can be made to suit particular applications

Excelon 73 General Purpose Filter

1/4", 3/8", 1/2" Port Sizes

ALE-1-6

Ordering information.

Models listed include PTF threads, automatic drain, metal bowl with liquid level indicator, and a 40 µm element.

* Typical flow with a 40 µm element at 90 psig (6.3 bar) inlet pressure and 5 psig (0.35 bar) pressure drop.

Alternative Models

F 7 3-G

★ ★

-

★★ ★ ★

Threads Substitute
PTF A

ISO Rc taper B
ISO G parallel G

Service Indicator Substitute
With electrical service indicator * E

With mechanical service indicator D
Without N

Drain Substitute
Automatic A

Manual, 1⁄4 turn Q

Element Substitute
5 µm 1

25 µm 2
40 µm 3

Bowl Substitute
Metal with liquid level indicator D

Transparent with guard P
Transparent T

Port Size Substitute
1/4" 2

3/8" 3
1/2" 4

Port Size Model Flow* scfm (dm3/s) Weight lb (kg)
1/4" F73G-2AN-AD3 53 (25) 1.1 (0.50)
3/8" F73G-3AN-AD3 65 (31) 1.1 (0.50)
1/2" F73G-4AN-AD3 69 (33) 1.1 (0.50)

ISO Symbols

Auto Drain

Manual Drain

F73G General Purpose Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-1-7

All Dimensions in Inches (mm)

Technical Data

Fluid: Compressed air
Maximum pressure:

Transparent bowl: 150 psig (10 bar)
Metal bowl: 250 psig (17 bar)

Operating temperature*:

Transparent bowl: -30° to 125°F (-34° to 50°C)
Metal bowl: -30° to 175°F (-34° to 80°C)

* Air supply must be dry enough to avoid ice formation at temperatures below 35°F (2°C).

Particle removal: 5 µm, 25 µm, or 40 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5 (particulates)
Typical flow with a 40 µm element at 90 psig (6.3 bar) inlet pressure and 5 psig
(0.35 bar) pressure drop: 65 scfm (31 dm

3

/s)
Manual drain connection:Will fit 1/8-27 and 1/8-28 pipe thread.
Automatic drain connection:Will fit 1/8-27 and 1/8-28 pipe thread. - Flexible tube

with 3/16" (5mm) minimum I.D.can be connected to the automatic drain. Drain
may fail to operate if the tube I.D. is less than 3/16" (5mm). Avoid restrictions in
the tube.

Automatic drain operating conditions (float operated):

Bowl pressure required to close drain: Greater than 5 psig (0.3 bar)
Bowl pressure required to open drain: Less than 3 psig (0.2 bar)
Minimum air flow required to close drain: 0.2 scfm (0.1 dm

3

/s)

Manual operation: Depress pin inside drain outlet to drain bowl
Nominal bowl size: 3.5 fluid ounce (0.1 liter)
Materials

Body: Aluminum

Bowl

Transparent: Polycarbonate
Transparent with guard: Polycarbonate, steel guard
Metal: Aluminum

Metal bowl liquid level indicator lens:Transparent nylon
Element: Sintered polypropylene
Elastomers: Neoprene and nitrile

An automatic drain is a two-way valve, which will close when the system is

pressurized.The drain opens when the float rises due to accumulated liquid
and on depressurization.

PRESSURE DROP

0.6

0.4

0.2

0

bar d

10

8

6

4

2

0

psid

PORT SIZE: 3/8"
ELEMENT: 5 µm

36

(2.5)

58

(4.0)

150

(10.0)

90

(6.3)

116
(8.0)

INLET PRESSURE: psig (bar)

01020304050dm

3

/s

AIR FLOW

0 20 40 60 80 100 scfm

FLOW CHARACTERISTICS

Typical Performance Characteristics

** Minimum clearance required to remove bowl.

6.15 (156)

1/4 Turn Manual Drain

8.50 (216) **

1.00 (25)

2.36 (60)

Automatic Drain

Optional
Mechanical
Service
Indicator

5.80 (147)

8.15 (207) **

2.68 (68)

2.45 (62)

1.22 (31)

Service kit includes automatic drain seal and bowl seal.

Service Kits

Item Type Part Number
Service kit Seal & Gasket 4380-600

Replacement elements

5 µm 4438-01
25 µm 4438-02
40 µm 4438-03

Liquid level lens kit Prismatic 4380-020
Replacement drains

Automatic 4000-51R
Manual quarter turn 619-50

PORT SIZE: 3/8"

psid

bar d

ELEMENT: 40 µm

10

0.6
8

6

0.4

PRESSURE DROP

4

0.2
2

0

0

0 20 40 60 80 100 scfm

01020304050dm

FLOW CHARACTERISTICS

INLET PRESSURE: psig (bar)

58

36

(2.5)

(4.0)

AIR FLOW

(6.3)

90

(8.0)

116

150

(10.0)

3

/s

See Section ALE-24 for Accessories

Littleton, CO USA Phone [phone] www.norgren.com

F74G

● Excelon design allows in-line or modular installation

● Quick release bayonet bowl

● Highly visible, prismatic liquid level indicator lens

● Optional mechanical service indicator turns from

green to red when the filter element needs to be
replaced

● Optional electrical service indicator provides

electrical output when the filter element needs to be
replaced

● Modular installations with Excelon 72, 73, and 74

series can be made to suit particular applications

Excelon 74 General Purpose Filter

3/8",1/2",3/4" Po rt S ize s

ALE-1-8

Ordering information.

Models listed include PTF threads, automatic drain, metal bowl with liquid level indicator, and a 40 µm element.

* Typical flow with a 40 µm element at 90 psig (6.3 bar) inlet pressure and 5 psig (0.35 bar) pressure drop.

Alternative Models

F 7 4-G

★ ★

-

★★ ★ ★

Threads Substitute
PTF A

ISO Rc taper B
ISO G parallel G

Service Life Indicator Substitute
With (visual) D

With (electrical) E
Without N

Drain Substitute
Automatic A
Manual, 1⁄4 turn Q

Element Substitute
5 µm 1

25 µm 2
40 µm 3

Bowl Substitute
Metal with liquid level indicator D
Transparent with guard P

Port Size Substitute
3/8" 3

1/2" 4
3/4" 6

Port Size Model Flow* scfm (dm3/s) Weight lb (kg)
3/8" F74G-3AN-AD3 112 (53) 1.82 (0.83)
1/2" F74G-4AN-AD3 140 (66) 1.79 (0.81)
3/4" F74G-6AN-AD3 140 (66) 1.75 (0.79)

ISO Symbols

Auto Drain

Manual Drain

F74G General Purpose Filters

Littleton, CO USA Phone [phone] www.norgren.com

ALE-1-9

Technical Data

Fluid: Compressed air
Maximum pressure

Transparent bowl: 150 psig (10 bar)
Metal bowl: 250 psig (17 bar)

Operating temperature*:

Transparent bowl: -34° to 125°F (-30° to 50°C)
Metal bowl: -34° to 175°F (-30° to 80°C)

* Air supply must be dry enough to avoid ice formation at temperatures below 35°F (2°C).

Particle removal: 5, 25, or 40 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5 (particulates)
Typical flow with a 40 µm element at 90 psig (6.3 bar) inlet pressure and 5 psig

(0.35 bar) pressure drop: 140 scfm (66 dm3/s)
Manual drain connection:Will fit 1/8-27 and 1/8-28 pipe thread
Automatic drain connection:Will fit 1/8-27 and 1/8-28 pipe thread. - Flexible tube

with 3/16" (5mm) minimum I.D.can be connected to the automatic drain. Drain
may fail to operate if the tube I.D. is less than 3/16" (5mm). Avoid restrictions in
the tube.

Automatic drain operating conditions (float operated):

Bowl pressure required to close drain: Greater than 5 psig (0.3 bar)
Bowl pressure required to open drain: Less than 3 psig (0.2 bar)
Minimum air flow required to close drain: 2 scfm (1 dm

3

/s)

Manual operation: Depress pin inside drain outlet to drain bowl
Nominal bowl size: 7 fluid ounce (0.2 liter)
Materials

Body: Aluminum
Bowl

Transparent: Polycarbonate with steel bowl guard

Metal: Aluminum
Metal bowl liquid level indicator lens:Transparent nylon
Element: Sintered polypropylene
Elastomers: Neoprene and Nitrile

An automatic drain is a two-way valve, which will close when the system is

pressurized.The drain opens when the float rises due to accumulated liquid
and on depressurization.

Typical Performance Characteristics

PRESSURE DROP

0.6

0.4

0.2

0

bar d

10

8

6

4

2

0

psid

36

(2.5)

58

(4.0)

150

(10.0)

90

(6.3)

116

(8.0)

INLET PRESSURE: psig (bar g)

0 20 40 60 80 100 dm3/s

AIR FLOW

0 40 80 120 160 200 scfm

PORT SIZE: 1/2"
ELEMENT: 5 µm

FLOW CHARACTERISTICS

PRESSURE DROP

0.6

0.4

0.2

0

bar d

10

8

6

4

2

0

psid

PORT SIZE: 1/2"
ELEMENT: 40 µm

36

(2.5)

58

(4.0)

150

(10.0)

90

(6.3)

116

(8.0)

INLET PRESSURE: psig (bar g)

0 20 40 60 80 100 dm3/s

AIR FLOW

0 40 80 120 160 200 scfm

FLOW CHARACTERISTICS

6.95 (177)

1/4 Turn Manual Drain

9.69 (246) **

3.15 (80)

2.36 (60)

†

1.00 (25)

2.89 (74)

1.45 (37)

Automatic Drain

Optional
Service
Indicator

6.35 (161)

9.06 (230) **

* Minimum clearance required to remove bowl.
† Dimension for alternative electrical service indicator is 1.98" (50.4 mm)

Item

Type Part Number

Service kit Seal & gasket 4380-700

Replacement elements

5 µm 4338-04
25 µm 4338-07
40 µm 4338-05

Liquid level lens kit Prismatic 4380-050

Replacement drains

Automatic (1/8 NPT outlet) 3000-10
Manual quarter turn 619-50

Service kit includes louvre/element seal, drain seal, bowl seal.

Service Kits

All Dimensions in Inches (mm)