Samson 4708-45 Service manual

Mounting and
Operating Instructions
EB 8546-1 EN
Translation of original instructions
Edition March 2016
Type4708-45 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.
Denition 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 Type4708-45 Supply Pres-
sure Regulator. For details on other Type4708-xx Supply Pressure Regulators uEB8546.
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 12bar pressure of the compressed air
network in a plant is reduced to an adjust-
able minimum pressure of 0.5 to 6bar.
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 briey 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 15µm.
Supply pressure regulator Type4708-45 x x 0 x x x x x 0 0 x
Connecting thread
ISO-228/1 - G½ 6
½-14NPT 7
Set point range
0.5 to 6bar, without pressure gauge 0
0.5 to 6bar, with pressure gauge, CrNiMo steel (device free
of copper) 1
0.5 to 6bar, 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 Type4708-45
Values measured with ½” connection
Supply pressure 1 to 12bar 1)
(15 to 180psi)
Set point range 0.2 to 1.6bar (3 to 24psi) or 0.5 to 6bar (8 to 90psi)
Air consumption at 7bar
supply pressure ≤0.1mn³/h
Dependency on inlet pressure Negligible (< 10mbar/4bar)
Reversing error 50mbar with set point range 0.5 to 6bar (8 to 90psi)
Hysteresis 50mbar with set point range 0.5 to 6bar (8 to 90psi)
Filter cartridge mesh size 15µm · Optionally 5µm
Permissible ambient
temperature –25 to +70°C 2)
Low-temperature version –50 to +70°C 2)
Weight Approx. 0.74kg 3)
Compliance
Pressure gauge
Indicating range 0 to 1.6bar (0 to 24psi) or 0 to 6bar (0 to 90psi)
Connection G
1
/
8
1) Recommendation: min. 1.0bar (15psi) 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 Type4708-45
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 15μm: 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 section8).
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 page6) are designed either
with ISO-228/1 - G½ or ½-14NPT
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 3mm.
Mountingthepressuregaugeontheback:
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.

EB 8546-1 EN 11
Adjusting the set point
5 Adjusting the set point
ÎSee Fig.1 on page6.
ÎUnscrew the cap on the set point screw
and adjust the set point of the supply
pressure regulator.
ÎTurning the knob or screw clockwise in-
creases the output pressure and turning it
counterclockwise reduces the output pres-
sure.
ÎLock the setting with the lock nut.
6 Maintenance
Risk of injury due to high pressure.
Shut off the air line before performing work
on the supply pressure regulator.
Draincondensedwaterthathascollected:
ÎActivate the manual drainage.
ÎReplace the gasket (order no. 0439-
0061), if necessary.
We recommend to check the lter as often as
possible.
WARNING
!
Tip

12 EB 8546-1 EN
Troubleshooting
7 Troubleshooting
Risk of injury due to high pressure.
Shut off the air line before performing work
on the supply pressure regulator.
Leakage between supply pressure regulator
andpneumaticconnections:
ÎCheck the pipe ttings are tted proper-
ly.
Leakage between supply pressure regulator
andlterreceptacle:
ÎMake sure that the lter receptacle is at-
tached properly.
Leakageatthedrainplug:
ÎCheck the drain plug for dirt and clean
or replace the lter receptacle, if neces-
sary.
Air capacity drops and the output pressure
drops:
ÎCheck the lter cartridge for dirt and
make sure the set point is correctly ad-
justed.
Pressure drop
ÎUnscrew the lter receptacle and renew
the lter cartridge.
8 Accessories/spare parts
Article Order no.
Filter cartridge 15µm
Filter cartridge 5µm
8504-0068
8504-9040
Filter receptacle, plastic
Filter receptacle, aluminum
Filter receptacle, stainless steel
1199-0423
1199-0424
1199-0425
Filter receptacle compatible with paint on
request
Seal for lter receptacle
PVMQ
NBR (free of silicone)
8421-0101
8421-0102
Stopper
(hex socket G
1
/
8
) 0079-0100
Pressure gauge1)
Stainless steel
Brass/stainless steel
Pressure gauge seal
Lock nut
0089-0025
0089-0026
1099-4305
0250-1949
Mounting bracket for
Type3271/3277 Actuator 1400-7343
1) With pressure compensation element
WARNING
!

EB 8546-1 EN 13
Dimensions in mm
9 Dimensions in mm
258
65
57
Output
Supply
Ø41
45
157
84
61
Type4708-45SupplyPressureRegulator,aluminumversion

14 EB 8546-1 EN
Troubleshooting
Type4708-45SupplyPressureRegulator,stainlesssteelversion
44
65
254
Output Supply
154
Ø41
42
60
81

SAMSON AG · MESS- UND REGELTECHNIK
Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: [phone] · Fax: [phone]
[email protected] · www.samson.de
EB 8546-1 EN 2017-05-03 · English