Samson 4708-45 Service manual
Mounting and
Operating Instructions
EB 8546-1 EN
Translation of original instructions
Edition March 2016
Type4708-45 Supply Pressure Regulator
with increased air capacity
2 EB 8546-1 EN
Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
Department (aftersalesser[email protected]).
The mounting and operating instructions for the devices are included in
the scope of delivery. The latest documentation is available on our website
(www.samson.de) > Product documentation. You can enter the document
number or type number in the [Find:] eld to look for a document.
Denition of signal words
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip
Contents
EB 8546-1 EN 3
1 General safety instructions.............................................................................5
2 Design and principle of operation ..................................................................6
2.1 Article code and versions ...............................................................................7
2.2 Technical data ...............................................................................................8
2.3 Materials.......................................................................................................9
3 Mounting the supply pressure regulator .......................................................10
4 Pneumatic connections.................................................................................10
4.1 Pressure gauge ............................................................................................10
5 Adjusting the set point.................................................................................11
6 Maintenance ...............................................................................................11
7 Troubleshooting...........................................................................................12
8 Accessories/spare parts ..............................................................................12
9 Dimensions in mm.......................................................................................13
These mounting and operating instructions apply exclusively to Type4708-45 Supply Pres-
sure Regulator. For details on other Type4708-xx Supply Pressure Regulators uEB8546.
Note
EB 8546-1 EN 5
General safety instructions
1 General safety instructions
For your own safety, follow these instructions concerning the mounting, start-up, and opera-
tion of the device:
−The device is to be mounted, started up or operated only by trained and experienced
personnel familiar with the product. According to these mounting and operating instruc-
tions, trained personnel refers to individuals who are able to judge the work they are as-
signed to and recognize possible dangers due to their specialized training, their knowl-
edge and experience as well as their knowledge of the applicable standards.
To avoid damage to any equipment, the following also applies:
−Proper shipping and storage are assumed.
6 EB 8546-1 EN
Design and principle of operation
2 Design and principle of oper-
ation
The supply pressure regulator is used to sup-
ply pneumatic measuring and control equip-
ment with a constant air supply. The maxi-
mum 12bar pressure of the compressed air
network in a plant is reduced to an adjust-
able minimum pressure of 0.5 to 6bar.
The compressed air at the inlet (supply) ows
across the lter and leaves the output with a
reduced pressure depending on the set point
adjusted. The plug is balanced to eliminate
the forces created by the upstream pressure
acting on the plug.
Any water contained in the compressed air
is separated and collected as condensate in
the lter receptacle, which must be mounted
suspended downwards. The collected con-
densate in the lter receptacle can be
drained off by briey pushing the drain
plug.
Cap
(to cover set point adjuster)
Cover
Second connection G
1
/
8
(not in view) for pressure
gauge or pilot valves
Output
Fastening bore
Filter receptacle
Filter cartridge
Drain plug to drain
off condensate
Supply
(not in view)
Pressure gauge
Fig.1: Components of Type 4708-45 Supply Pressure Regulator (aluminum version)
EB 8546-1 EN 7
Design and principle of operation
2.1 Article code and versions
The supply pressure regulator is available with an aluminum or stainless steel body and a
transparent plastic or metal lter receptacle.
The lter cartridge installed has a mesh size of 15µm.
Supply pressure regulator Type4708-45 x x 0 x x x x x 0 0 x
Connecting thread
ISO-228/1 - G½ 6
½-14NPT 7
Set point range
0.5 to 6bar, without pressure gauge 0
0.5 to 6bar, with pressure gauge, CrNiMo steel (device free
of copper) 1
0.5 to 6bar, with pressure gauge (nickel-plated brass
connection) 2
No. of pressure gauges
One pressure gauge 2
Body material
Aluminum (3.2315) 0
Stainless steel (1.4409) 1
Filter
in transparent plastic receptacle 2
in aluminum receptacle 3
in stainless steel receptacle 4
Temperature range
–25 to +70°C (standard) 0
–50 to +70°C, version for low temperatures 2
Application
Standard 0
Device compatible with paint 0 1
Special version
Without 0 0 0
8 EB 8546-1 EN
Design and principle of operation
2.2 Technical data
Supply pressure regulator Type4708-45
Values measured with ½” connection
Supply pressure 1 to 12bar 1)
(15 to 180psi)
Set point range 0.2 to 1.6bar (3 to 24psi) or 0.5 to 6bar (8 to 90psi)
Air consumption at 7bar
supply pressure ≤0.1mn³/h
Dependency on inlet pressure Negligible (< 10mbar/4bar)
Reversing error 50mbar with set point range 0.5 to 6bar (8 to 90psi)
Hysteresis 50mbar with set point range 0.5 to 6bar (8 to 90psi)
Filter cartridge mesh size 15µm · Optionally 5µm
Permissible ambient
temperature –25 to +70°C 2)
Low-temperature version –50 to +70°C 2)
Weight Approx. 0.74kg 3)
Compliance
Pressure gauge
Indicating range 0 to 1.6bar (0 to 24psi) or 0 to 6bar (0 to 90psi)
Connection G
1
/
8
1) Recommendation: min. 1.0bar (15psi) above the adjusted set point
2) Applies also to rotating supplementary lter
3) With aluminum body and polyamide lter receptacle
EB 8546-1 EN 9
Design and principle of operation
2.3 Materials
Supply pressure regulator Type4708-45
Body Metal parts Aluminum 1) (3.3547) or stainless steel (1.4409)
Plastic parts Polyamide, glass ber reinforced
Cover Polyamide, glass ber reinforced
Cap Polyamide, glass ber reinforced
Plug 1.4305 and polyoxymethylene
Diaphragm NBR · FVMQ for low-temperature version
Diaphragm plate Polyamide, glass ber reinforced, or aluminum
Set point spring 1.4310
Filter receptacle UV-resistant polyamide (Grilamid TR90UV)
Filter cartridge 15μm: polypropylene and polyethylene
Pressure gauge
Body Stainless steel
Connection and measuring
element Nickel-plated brass or stainless steel for copper-free version
10 EB 8546-1 EN
Mounting the supply pressure regulator
3 Mounting the supply pressure
regulator
ÎTo prevent excessive amounts of con-
densed water from collecting, keep the
distance between the compressor and
supply pressure regulator as short as
possible.
The supply pressure regulator can either be
mounted directly in the pipeline of the air
supply or on rails or brackets using the cor-
responding mounting parts (see accessories
in section8).
ÎObserve the ow direction of the supply
air. An arrow on the nameplate indicates
the direction.
Depending on how the regulator is installed
in the pipe, it may be necessary to mount the
pressure gauge at the back of the supply
pressure regulator (see section 4.1).
4 Pneumatic connections
The air connections (supply and output, see
Fig.1 on page6) are designed either
with ISO-228/1 - G½ or ½-14NPT
threads.
The second pressure gauge on the back of
the regulator can be used to additionally
supply pilot valves with a constant supply
pressure. This connection at the back has a
G
1
/
8
thread.
4.1 Pressure gauge
ÎWhen attaching the pressure gauge,
make sure that the gap between the lock
nut and pressure gauge’s square end is
not smaller than 2 to 3mm.
Mountingthepressuregaugeontheback:
ÎRemove the stopper (hexagon socket
head screw G
1
/
8
) and screw it into the
unoccupied pressure gauge connection
at the front to seal it.
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