This document provides information about SEG Series after-service air compressors ranging from 5HP to 15HP. It describes the key components of the compressors including the enclosure, airend, motor, cooling system, filtration system, valves, and controller. The airend uses a heavy-duty design with SKF bearings for long life. The compressor also features a centrifugal cooling fan, oil and air filters, thermo control and pressure valves, and an automated controller for protection and maintenance functions.

1. 1
SEG Series
After-service Training
5HP~15HP

2. Appearance
• Global Design
• Used the SolidWorks to do the
Avant-garde design.
• Low noise (65-68 dBA)
• 5-15 HP available
1. SEG-B: Base Mounted
2. SEG-D: Base Mounted and Integrated
Dryer
3. SEG-T: Receiver Tank Mounted
4. SEG-A: Receiver Tank Mounted and
Integrated Dryer
2

3. 3
Enclosure
Thermo Control Valve
MPV
Cooler
Centrifugal Fan
Anti-vibration Pad
Air Filter
Oil Fine Separator
Airend
Oil Filter
Motor
Tank Option
Suction Valve

4. Configuration Table
Series NO. Description Spec.
1 Enclosure Thickness: 1.5mm
2 Receiver FSCURTIS
3 Air-end FSCURTIS
4 Motor IP55/SKF FSCURTIS
5 Controller AIMS control
6 Cooler Aluminum
7 Thermo Control Valve AMOT
8 Pressure Sensor HUBA
9 Temperature Sensor PT100
10 Oil Fine Separator MANN
11 Oil Filter MANN
12 Air Filter 3um
13 Lubricant FSCURTIS
14 MPV No-Return
15 Suction Valve VMC
16 Pulley Taper Pulley
17 Belt Optibelt
18 Safety Valve Evers
19 Hose and Joint Assembly High Pressure, Flexible
20 Dryer FSCURTIS
21 Per-filter/after-filter FSCURTIS
4

5. Airend
• High efficiency airend, used
the 5：6 rotor.
• Heavy castings reduces noise.
• Modular design with the
airend and receiver.
Potential leak paths reduced.
• Used the SKF bearings which
can be used more than 20000
hours depending on
conditions.
• compact design, reliable,
durable and, high efficiency,
exquisite appearance.
5
OFS
OF
Airend

6. Airend Exploded Drawing
6

7. PID Drawing

8. AIMS Controller
• Humanized control, simplicity of
operation.
• Language : English.
• The operating parameter can be
browsed on the display.
• Automatic maintenance
management for the AF,OF,OFS and
lubricant.
• The Motor Overload Protection and
high temperature and pressure
protection are available in the
control system.
• We use the DOL start for the 5 &
7.5 HP; Otherwise we use the Y-Δ
start for the 10 & 15 HP.
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9. Controller General Function
• Display the operating parameter and
condition of the compressor (discharge
pressure/temperature, motor
voltage/current, etc.）.
• Discharge high temperature protection.
• Discharge high pressure protection.
• Motor overload protection.
• Voltage and current protection.
• Phase detection.
• Temperature sensor error detection.
• Pressure sensor error detection.
• Automatic maintenance management
for the AF,OF,OFS and lubricant.
• Owe stop.
9

10. Motor
• The motors are manufactured
according to the American
NEMA standard and EFF 2
efficiency
• 4 pole
• SKF bearings.
• IP55, Insulation Class F，B
Class, Temperature Rise.
• Incorporates cooling fan
10
Centrifugal Fan
Motor Pulley

11. Motor Connecting and the Three-Phase Circuit
Principle of motor rotation: The periodic variation of the rotation
of the electromagnetic field promote the rotation of the rotor.
A
B
C
The Rotation of the
Electromagnetic Field
B
A
C
After the Phase
Modulation
380AC
Y 380AC
Δ
A B C

12. Motor Insulation Class
• Class A Permit 65℃ temperature rise, the max.
temperature of the motor is 105℃.
• Class B Permit 90℃ temperature rise, the max.
temperature of the motor is 130℃.
• Class F Permit 115℃ temperature rise, the max.
temperature of the motor is 155℃.
• Class H Permit 140℃ temperature rise, the max.
temperature of the motor is 180℃.

13. Taper Pulley
• Standardization, high precision,
compact structure, installation
and disassembling convenience.
• The pulley and bush conform to
ISO groove specifications and
standard sizes which can be
replaced easily .
• The manufacturers are required
to do additional dynamic
balance for every pulley.

14. Cooling Fan（ Centrifugal Type ）
• High efficiency, High air flow
• High hydrostatic pressure
• Uniform flow field
• Low noise
• Stable operation and convenient
maintenance
• Eliminates additional cooling fan
motor and assembly

15. Valves
Min. Pressure Valve
• Installed at air outlet
• Allows internal pressure to build
before supplying air to customer
Suction Valve
• Load/No load
• Doubles as check valve
Thermo Valve
• Maintains the discharge temperature,
not to exceed above the set point.
• Eliminates water in oil
• Increases efficiency

16. Suction Valve
• Piston type suction valve，
which can control the system
load/unload by the piston
movement up and down.
• When stopped, the piston
quickly close in order to
prevent oil spewed .
• Solenoid relief valve is
assembled on the suction valve.
• Low pressure drop with the
bypass valve in this design,
which are more effective to
reduce the intake noise.
16
Solenoid relief valve
Suction Valve

17. Min. Pressure Valve (MPV)
• Minimum Pressure Valve is located at the
outlet of air discharge from Air-Oil
Receiver. Operating pressure is set at
around 4.5 kg/cm² (65PSIG). The
functions of Minimum Pressure Valve are
shown below:
• （1）It takes the priority to build up the
circulation pressure, the lubricating oil
needed when starting of the machine,
which ensures lubrication for the Airend.
（2）The Minimum Pressure Valve only
opens when the pressure is over the pre-
set value of the valve. It can reduce the
airflow velocity entering the Oil Fine
Separator, which can protect the Oil Fine
Separator from being damaged.
（3）Prevent back flow under off-load
running.
Receiver
Discharge
Air Control
Pipe

18. Thermo Control Valve
• The Thermo Control Valve is installed in the
front of the cooler with the function of
maintaining the discharge temperature, not to
exceed above the set point. When starting the
machine, the lubricating oil temperature is
low, so the Thermo Control Valve will
automatically open the by-pass circuit for
direct flow, with the oil entering directly into
the Airend without passing through the Oil
Cooler. If the temperature of oil rises above
67℃(152℉), the valve will open gradually and
becomes fully open at 72C (161F). At this
moment, all the lubricant that enters into the
Airend will first pass through the Oil Cooler.

19. Cooling Circuit
Oil Cooler
• Maintains machine operating
temperatures
• Keep clean and well ventilated for
proper operation
Air Cooler (oil/air)
• Air cooler standard on 10/15 HP-
Maintains 15 degree CTD
• Tank used as cooler on 5/7.5 HP

20. Oil/After Cooler
• The compressed air can be cooled down by
cooling fan blowing air through this Air-Oil
Cooler. Generally discharge air temperature
is 15℃ above ambient temperature.
Environment is a crucial factor for air-cooled
type air compressors. The air-cooled model
of compressor requires a well ventilated
environment. Hence ensure to install in a
proper ventilated area. The function of oil
cooler is the same as air cooler. Install unit
in a well ventilated area. If the environment
situation is not well, the air cooler will get
chocked by dust/dirt, and the system
temperature will be higher than normal.
Clean the dust on the fins of radiator
periodically with compressed air or with
solvent.
• SEG-5~7.5 is without after cooler.

21. Filtration
Air Filter
• 3 Micron and cleanable
• Large surface area reduces psi drop
• Replace at 2000 hours
Air/Oil Separator
• Spin on and top access for easy
replacement and low downtime
• 3-5 ppm oil carryover
• Replace at 4000 hours
Oil filter
• Cleans and protects oil circuit
• Replace at 2000 hours
• Safety shutdown will keep
compressor from starting with
clogged filter

22. Air Filter
• Air Filter- A dry paper filter which
acts as a special-purpose air cleaner
of the air compressor.
• The function of the filter is to
remove dust from the suction air.
For normal environmental use, pull
out the filter and clean it by blowing
low-pressure air on it every 500
hours of operation to remove the
dust on its surface, and every 2000
hours of operation to replace the
element.
• Filtering precision is 3 micron.
• Large filtering area, low intake
pressure drop.

23. Oil Fine Separator
• The element of the Oil Fine Separator is made by multiple layers of fine
fabric. This fabric filters almost all the vaporous of oil particles out of the
compressed air. The oil froth is completely separated from compressed air
through the Oil Fine Separator, if the oil content in the air is lower than
3PPM, the machine is working properly. The life span of the Oil Fine Separator
is influenced greatly by the lubricant grade and condition, provided
environmental conditions around the compressor are normal. FSCURTIS
strongly suggests customers to use the recommended genuine Lubricating Oil
supplied by the company;
• Use FSCURTIS “RS8000” Lubricant To Assure & Maintain Your Warranty!
• The oil filtered out by the Oil Fine Separator is collected in the small central
flute for re-circulation to the Airend through the Oil Return Tube (Scavenger
Line), which prevents discharging of the filtered lubricating oil with the air,
and avoid oil carry over.
• There is a Safety Valve, Pressure Relief Valve, and a Minimum Pressure Valve
at the outlet of the Oil Fine Separator. Compressed air is led through the Oil
Fine Separator, to the Minimum Pressure Valve, and then to the After Cooler.
• Generally, requirement of Oil Fine Separator replacement can be decided by
the following reasons:
• The oil content in the air discharge pipeline increases (Oil carry-over
increases).
• Alarm on the Controller indicates replacement is required.
• Check whether the oil pressure is too high.
• Check whether the operating current (Amp.) increases.

24. Oil Filter
• The Oil Filter is a paper type filter
that eliminates foreign substances
in the oil, such as; metal particles,
deteriorated, or burnt oil, etc. with
the filtering accuracy being
between 10-15μm. The Oil Filter
protects the bearings, rotors, and
gears from the above mentioned
particles.
• We suggest that the Lubricating Oil
and Oil Filter should be changed
within the first five hundred
operating hours, even sooner if it is
working in an exceptionally dusty
environment. The compressor has a
built-in filter protection mechanism
that will automatically prevent the
machine from starting if the filter
clogged or too dirty. Please follow
maintenance instructions when
changing the Lubricating Oil and Oil
Filter in your machine.

25. Temperature Sensor
• The compressor may trip due to
high discharge temperature
caused by the lack of oil in
circulation. As discharge
temperature reaches the preset
point of the temperature in the
Controller, the Controller will
shut down the unit. Usually the
pre-set value of the
temperature is 100℃ (230°F).
There is also a temperature
gauge in instrument board,
from which you can read the
discharge temperature.

26. Temperature Sensor（ PT100 Detection）
• PT100 meaning： When the temperature is 0℃
the resistance is 100Ω.
• The resistance will increase 0.39Ω /1℃.
• For example：The resistance is130Ω;
T=（130-100）/0.39=77 ℃

27. Pressure Sensor
• The pressure sensor is
HUBA’s products.
• The pressure can be
checked by current. The
current range is 4~20mA,
corresponding the
pressure range is
0~16kg/cm². If the
current is 6mA, the
pressure will be 2kg/cm².
P=6-4=2kg/cm².

28. Lubricant
• Factory filled
• High quality synthetic compressor
lubricant.
• Extended service life-4000 hour
• High temperature operation
• Easy start-up when cold, reduced
sludge and lacquer buildup, is
completely compatible with all seals,
gaskets, and other compressor’s
critical components.
• When operating in severe conditions
it will be necessary to change the
lubricant more frequently.
• Temperature of operation has the
most significant effect on the life of
the lubricant.
Discharge
Temperature RS8000
Up to 85 ℃ 8,000 hrs
86 ℃ to 90 ℃ 6,000 hrs
91 ℃ to 95 ℃ 4,000 hrs
96 ℃ to 100 ℃ 2,000 hrs
Note: Above running hours are based
on the typical datum in a good
condition of installation environment.

29. Maintenance
• Maintenance Intervals
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30. Maintenance
• Maintenance Intervals
30

31. Maintenance
• Maintenance Schedule
31

32. Air Quality
Refrigerated Dryer
• Eliminates water vapor remaining in the
compressed air coming at the outlet of
the compressor house.
• The dryers have been designed for
nominal standard inlet conditions as per
ISO 7183 in order to obtain a dew point
under pressure of +3℃ to +7℃.
Filtration
• Eliminates oil, water and dirt particles
• Periodic change out needed
32

33. Refrigeration Dryer
• The refrigeration dryer
eliminates any water
vapor remaining in the
compressed air coming at
the outlet of the
compressor house. The
dryers have been designed
for nominal standard inlet
conditions as per ISO 7183
in order to obtain a dew
point under pressure of
+3℃ to +7℃.
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34. Controller-Dryer
• Controller Panel
34

35. Specifications of the Dryer
Item Description
Medium Compressed Air
Inlet condition
Free of dirt, oil, condensate and
corrosive substances
Operating pressure* 7 kg/cm² (100 psi)
Inlet temperature* Max +45℃
Inlet humidity Saturated at specified conditions
Ambient temperature Max +38℃
Pressure dew point + 3℃ to 7℃
Cooling system Air cooled / Water cooled
Max. Working pressure 16 Kg/cm² (230 psi)
Refrigerant compressor Hermetic sealed
35

36. Maintenance of the Dryer
• Various risks (projection, noise) : This operation should be performed by professionals
of Refrigeration.
• FSCURTIS make Refrigeration dryers are robust, reliable machines. To ensure
uninterrupted, problem-free operation, regularly perform the inspections below.
36
Inspection
Discharge
Pressure in
refrigerant line
Drain
Valve
Air Cooled
condenser surface
cleaning
Inlet
temperature
Dew point
temperature
Visual D D W D D
Spares
replacement
_ _ _ _ _
Cleaning _ H/R M _ _
D-Daily W-Weekly M-Monthly H-Half Yearly Y-Yearly R-As Required

37. Maintenance of the Dryer
Discharge pressure exceeds the value specified
Freon Discharge Pressure in psig
R22 300
R134a 200
R407c 300
37
Amount of gas to be charged
Capacity
(cfm)
Gas used
Amount of gas to
be charged
(in gm)
Below 40 R134a 350
Below 60 R134a 400
Table 1
Table 2

38. Downstream Filter
38
Recommendations:
 Filters should be located downstream of after coolers and air receivers, or any
other location in the system where the temperature does not exceed the
recommended maximum of 60℃, and as close to the point of application as possible.
A coalescing filter does not lower the dew point of compressed air. Temperature
changes downstream of the filter may result in condensation of water and oil
vapors. Installing close to the application minimizes the risk of pipe scale
downstream of the filters contaminating filtered air.
 Care for the filter by not installing it downstream of quick opening valves and by
protecting it from any possible reverse flow or other shock conditions.
 To facilitate maintenance without shutting the system down, a three-valve bypass
system enabling the filter to be isolated, can be used. However, contamination will
inevitably leak through valves bypassing the filter. For applications that cannot
tolerate unfiltered air, have a second filter installed in the bypass loop.
 Install FS-Curtis differential pressure gauges to monitor pressure drop across filters.

39. Downstream Filter
• Description
FS-Curtis compressed air filters when properly installed and
maintained will; remove oil, dirt, water liquids or mist, and
other particulates from compressed air.
• Installation
Inspect the filter immediately upon receipt of the filter for
any damage that may have occurred during shipment. Do
not install, or attempt to repair the filter if there is
damage. Purge all pipe work before installing the filter to
thoroughly clean out any dirt or impurities within. Ensure
that the weight of any pipe and filters are properly
supported. Connections and fittings must be rated for the
maximum operating temperature pressure.
Install the filter in a vertical upright position, observing
the correct direction of air flow as indicated by the flow
indicator arrow. Allow sufficient clearance below the filter
and working area for removal of the filter body and filter
element.
39

40. Exploded Drawing-Filter
40

41. Exploded Drawing-Filter
41

42. Maintenance of the Filter
42
• Filter Element
Schedule regular element changes to ensure optimum performance and quality of
filtered air, keeping operating costs low. Increased pressure drop reduces system
efficiency, which may damage some system components. The compressor will also have
to work harder to overcome the pressure drop, increasing operating costs.
Filter elements must be replaced at least once a year, or when the maximum
recommended pressure drop(0.6 bar) has been exceeded. For activated carbon filters,
replace the filter elements every three months, or when odors, tastes or vapors are
detected downstream of the filter.
• Parts and Accessories
Inspect all filter parts and accessories during each element change and replace
damaged or worn parts when necessary.
Use only original FS-Curtis spares to ensure proper filter performance and to avoid
compromising your filter warranty.
• Automatic Condensate Drain
Inspect the automatic condensate drain every two to three weeks for excessive oil and
water by using the manual drain function to discharge the condensate until the
compressed air blows through for a few seconds. If a significant amount of condensate
is discharged, the condensate drain should be cleaned or replace as required.

43. Maintenance of the Filter
• The FS-Curtis differential Pressure gauge, with it’s easy to read display, has
been designed to facilitate atmospheric and accurate monitoring of pressure
drop across a filter. Installation of the gauge is easy and flexible as the gauge
is bi-directional. The differential pressure gauge offers practical and
economical condition monitoring of filter elements and hence allows efficient
maintenance of your compressed air system, reducing maintenance and
operation costs
• Operation
43

44. Overview
Screw versus Piston technology
• 100% continuous duty
• More CFM
• More energy efficient
• Pulsation free air
• Better air quality
• No reduction in performance over time
Availability
• In stock
Warranty
• 1 year standard
• Up to 5 years optional
44

45. Thank You For Your Attention
Q & A