Samson Type 4708 Service manual

Translation of original instructions
EB 8546 EN
Type4708-12
Type4708-53 Type4708-64
Edition April 2020
Type4708SupplyPressureRegulators

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. The images shown in
these instructions are for illustration purposes only. The actual product may vary.
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 ([e-mail]).
Documents relating to the device, such as the mounting and operating in-
structions, are available on our website at www.samsongroup.com >
Service & Support > Downloads > Documentation.
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
EB 8546 EN

Contents
EB 8546 EN
1 Safetyinstructionsandmeasures ...................................................................5
1.1 Notes on possible personal injury ...................................................................7
1.2 Notes on possible property damage................................................................7
2 Markings on the device .................................................................................8
3 Design and principle of operation ................................................................12
3.1 Versions ......................................................................................................14
3.2 Technical data .............................................................................................15
3.3 Spare parts .................................................................................................17
3.4 Accessories .................................................................................................18
3.5 Dimensions in mm........................................................................................19
4 Measures for preparation............................................................................28
4.1 Unpacking ..................................................................................................28
4.2 Storage.......................................................................................................28
5 Mounting the regulator................................................................................29
5.1 Compact supply pressure regulator................................................................29
5.1.1 Direction of ow ..........................................................................................29
5.1.2 Turning the supply pressure regulator.............................................................30
5.2 Supply pressure regulators for attachment to positioners and actuators.............31
6 Pneumaticconnections.................................................................................34
6.1 Pressure gauge ............................................................................................34
6.2 Additional output.........................................................................................35
7 Manual/automaticswitchover .....................................................................37
7.1 Mounting on positioners ...............................................................................37
7.2 Mounting using an adapter plate ..................................................................38
7.3 Operating the manual/automatic switchover unit ...........................................39
7.4 Filter with lter receptacle .............................................................................39
7.4.1 Mounting the air lter...................................................................................39
8 Rotatingsupplementarylter.......................................................................40
8.1 Mounting the rotating supplementary lter .....................................................40
9 Adjusting the set point.................................................................................40
10 Maintenance ...............................................................................................41
10.1 Maintenance ...............................................................................................41
10.2 Preparation for return shipment.....................................................................41

Contents
EB 8546 EN
11 Troubleshooting...........................................................................................42
12 Decommissioning and removal ....................................................................43
12.1 Decommissioning.........................................................................................43
12.2 Removing the supply pressure regulator.........................................................43
12.3 Disposal......................................................................................................43
13 After-sales service .......................................................................................44

EB 8546 EN 5
Safetyinstructionsandmeasures
1 Safetyinstructionsandmeasures
Intended use
The Type4708 Supply Pressure Regulator reduces and controls the maximum pressure of
12bar (180psi) in a compressed air network to the pressure adjusted at the set point
adjuster. The device is designed to operate under exactly dened conditions (e.g. operating
pressure, temperature). Therefore, operators must ensure that the supply pressure regulator is
only used in applications where the operating conditions correspond to the technical data. In
case operators intend to use the supply pressure regulators in other applications or
conditions than specied, contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the
device for its intended purpose or for damage caused by external forces or any other
external factors.
ÎRefer to the technical data for limits and elds of application as well as possible uses.
Reasonablyforeseeablemisuse
The Type4708 Supply Pressure Regulator is not suitable for the following applications:
−Use outside the limits dened during sizing and by the technical data
Furthermore, the following activities do not comply with the intended use:
−Use of non-original spare parts
−Performing maintenance activities not specied by SAMSON
Qualicationsofoperatingpersonnel
The supply pressure regulator must be mounted, started up and serviced by fully trained and
qualied personnel only; the accepted industry codes and practices are to be observed.
According to these mounting and operating instructions, trained personnel refers to
individuals who are able to judge the work they are assigned to and recognize possible
hazards due to their specialized training, their knowledge and experience as well as their
knowledge of the applicable standards.
Personalprotectiveequipment
No personal protective equipment is required for the direct handling of the supply pressure
regulator. Work on the control valve may be necessary when mounting or removing the
device.

6 EB 8546 EN
Safetyinstructionsandmeasures
ÎObserve the requirements for personal protective equipment specied in the valve
documentation.
ÎCheck with the plant operator for details on further protective equipment.
Revisionsandothermodications
Revisions, conversions or other modications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example.
Furthermore, the product may no longer meet the requirements for its intended use.
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
prevent hazards that could be caused in the pneumatic instrumentation by the signal pressure
or by moving parts by taking appropriate precautions. They must observe all hazard state-
ments, warning and caution notes in these mounting and operating instructions, especially
for installation, start-up and service work.
Responsibilitiesoftheoperator
The operator is responsible for proper operation and compliance with the safety regulations.
Operators are obliged to provide these mounting and operating instructions to the operating
personnel and to instruct them in proper operation. Furthermore, the operator must ensure
that operating personnel or third persons are not exposed to any danger.
Responsibilitiesofoperatingpersonnel
Operating personnel must read and understand these mounting and operating instructions as
well as the specied hazard statements, warning and caution notes. Furthermore, the operat-
ing personnel must be familiar with the applicable health, safety and accident prevention
regulations and comply with them.
Referencedstandardsandregulations
Devices with a CE marking fulll the requirements of the Directives 2011/65/EU (RoHS) and
2015/863/EU. The declaration of conformity is included at the end of these instructions.
Referenceddocumentation
The following documents apply in addition to these mounting and operating instructions:
−The mounting and operating instructions of the components on which the supply pressure
regulator is mounted (valve, actuator, positioner etc.).

EB 8546 EN 7
Safetyinstructionsandmeasures
1.1 Notes on possible personal injury
WARNING
!
Riskofburstinginpressureequipment.
Control valves, mounting parts and pipelines are pressure equipment. Improper opening
can lead to bursting of the valve.
ÎBefore starting any work on the control valve, depressurize all plant sections affected
as well as the valve.
ÎObserve the valve's safety instructions.
1.2 Notes on possible property damage
NOTICE
!
Riskofdamagetothesupplypressureregulatorduetoexcessivelyhightightening
torque.
ÎDo not exceed the maximum permissible torques specied in these mounting and
operating instructions.
Riskofdamagetothesupplypressureregulatorduetoforeignparticlesenteringit.
ÎDo not remove the protective lm until immediately before mounting.
Riskofdamagetothesupplypressureregulatorduetoimproperstorage.
ÎObserve the storage instructions. Contact SAMSON, if need be.

8 EB 8546 EN
Markings on the device
2 Markings on the device
Article code
SupplyPressureRegulator Type4708- x x x x x x x x x x x x x
Standardversion
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle 1 0 0
Aluminum mounted parts, plastic body, with transparent lter
receptacle 1 1 0
Completely of aluminum, no plastic parts 1 2 2
Stainlesssteelversion
Completely of stainless steel, no plastic parts 1 3 3
Stainless steel mounted parts, plastic body, with transparent lter
receptacle 1 4 1
Stainless steel mounted parts, plastic body, with lter, without
separate lter receptacle 1 7 1
Version for increased air capacity
Aluminum or stainless steel body, plastic cover, transparent plastic
or metal lter receptacle 4 5 2/3
Versionwithadapterplateforpositioners
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle, for mounting onto Type3730/3766/3767
Positioners
5 3 0
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle, for mounting onto Type3730/3766/3767
Positioners
5 4 0
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle, for mounting onto Type4763/4765 Positioners 5 5 0
Versionwithadapterplateforpneumaticactuators
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle, for mounting onto Type3372 and Type3277
Actuators (240 to 700cm²) with Type3730/3766/3767
Positioners
6 2 0
Aluminum mounted parts, plastic body, with lter, without separate
lter receptacle, for mounting onto Type3277 Actuators (175 to
750cm²) with connection block
6 4 0

EB 8546 EN 9
Markings on the device
SupplyPressureRegulator Type4708- x x x x x x x x x x x x x
Further versions
Manual/automatic switchover 8 2 0/1
Filter for compressed air, aluminum body, transparent plastic lter
receptacle 8 3 0
Filter for compressed air, aluminum body and lter receptacle 8 4 0
Filter for compressed air, stainless steel body, transparent plastic
lter receptacle 8 6 1
Filter for compressed air, stainless steel body and lter receptacle 8 7 1
Connecting thread
ISO-228/1-G¼ 2
¼-18NPT 5
ISO-228/1-G½ 6
½-14NPT 7
Setpointrange
0.5 to 6.0bar, without pressure gauge 0 0
0.5 to 6.0bar, with pressure gauge completely of stainless steel
(device free of copper) 1 0
0.5 to 6.0bar, with pressure gauge (nickel-plated brass connection) 2 0
0.2 to 1.6bar, without pressure gauge 3 0
0.2 to 1.6bar, with pressure gauge completely of stainless steel
(device free of copper) 4 0
0.2 to 1.6bar, with pressure gauge (nickel-plated brass connection) 5 0
0.5 to 6.0bar, with pressure gauge (nickel-plated brass connection,
dial in MPa and kg/cm³) 6 0
Without 8 0
Number of pressure gauges
Without 0
One pressure gauge 1
Two pressure gauges 2
Material
Aluminum mounted parts (plastic cover) 0
Stainless steel mounted parts (plastic cover) 1
Aluminum mounted parts and cover 2
Stainless steel mounted parts and cover 3

10 EB 8546 EN
Markings on the device
SupplyPressureRegulator Type4708- x x x x x x x x x x x x x
Filter
Without 0
in black plastic regulator body 1
in transparent plastic receptacle (cannot be aligned) 2
in aluminum receptacle (cannot be aligned) 3
in stainless steel receptacle (cannot be aligned) 4
Temperature range
–25 to +70°C (standard) 0
–40 to +70°C 1
–50 to +70°C 2
Application
Standard 0
Device compatible with paint 1
Exhaust port with thread 2
Specialversion
Without 000
Filter cartridge 5µm 001
Pressure gauge connection
1
/
8
NPT 002
Special paint coating RAL1019 002

EB 8546 EN 11

12 EB 8546 EN
Design and principle of operation
3 Design and principle of oper-
ation
The supply pressure regulator is used to
supply pneumatic measuring and control
equipment with a constant air supply. The
maximum 12bar pressure of the compressed
air network in a plant is reduced to an
adjustable minimum pressure of 0.2 to
1.6bar or 0.5 to 6bar.
At the inlet side, the supply pressure
regulator is equipped with a lter cartridge
with a mesh size of 20μm. In addition, the
regulator can also be equipped with a lter
receptacle and a pressure gauge on the
outlet side.
12
5
3
1
21
20
Fig.1: Type4708
The compressed air at the inlet ows across
the lter through the free cross-section be-
tween the seat (1.1) and plug (1.2) and
leaves the output with a reduced pressure
depending on the plug position.
The output pressure to be controlled is
transmitted to the diaphragm (2.1) over the
connecting bore (1.3) and converted into a
positioning force. This force is used to move
the valve plug depending on the force of the
positioning spring (6).
Turning the set point screw (7) causes the
spring force to change and, as a result, the
required set point is adjusted.
The set point ranges of the supply pressure
regulator from 0.2 to 1.6bar and 0.5 to
6bar are determined by various tensions of
the installed positioning spring (6).
Condensed water contained in the
compressed air can be collected and drained
when the lter cartridge (11) is mounted
horizontally or the lter receptacle (13) is
suspended downwards. The screw plug (12)
can be unscrewed or the manual drainage
(16) can be activated to drain condensed
water.

EB 8546 EN 13
Design and principle of operation
13
16
11
11.1
11.2
11.3
12.1
11.4
1Body
1.1 Seat
1.2 Plug
1.3 Connecting bore
2 Plate
2.1 Diaphragm
3 Cover
3.1 Venting bore
4 Centering bushing
5 Cap
6Set point spring
7Set point screw
8 Lock nut
11 Filter cartridge
11.1 Screw
11.2 Cap
11.3 Shroud
11.4 Air deector
12 Screw plug
12.1 Seal
13 Filter receptacle
13.1 Seal
16 Manual drainage
20 Fastening screw
21 Spring washer
11 12.1 12
3.1
7
8
5
4
6
3
2
1.2
1.3
1
2.1
1.1
Fig.2: Sectional drawings

14 EB 8546 EN
Design and principle of operation
3.1 Versions
SupplyPressureRegulator Type4708- x x x x
Standard version
Aluminum lter without lter receptacle 1 0
with plastic lter receptacle 1 1
with aluminum lter receptacle 1 2
Stainless steel version
Stainless steel lter with stainless steel lter receptacle 1 3
with plastic lter receptacle 1 4
without lter receptacle 1 7
Connection
G¼ 2
¼-18NPT 5
Set point range 0.5 to 6bar (8 to 90psi)
Without pressure gauge 0
with pressure gauge, completely free of copper 1
with pressure gauge, housing free of copper 2
Set point range 0.2 to 1.6bar (3 to 23psi)
Without pressure gauge 3
with pressure gauge, completely free of copper 4
with pressure gauge, housing free of copper 5
Supply pressure regulator with increased air capacity
uEB8546-1 4 5
with adapter plate for positioners
Types3730, 3766, 3767 5 3
Types3725, 3730, 3766, 3767 5 4
Type3725, Types4763/4765 5 5 0
with adapter plate for pneumatic actuators
Type3277 Actuator (240 to 700cm²) with Type3730, 3766 or 3767 Positioner 6 2 0
Type3372 6 2
Type3277 Actuator with connection block 6 4 0

EB 8546 EN 15
Design and principle of operation
SupplyPressureRegulator Type4708- x x x x
Manual/automatic switchover
Bypass for positioner 8 2
Filter without pressure gauge Type4708-
Aluminum body and plastic lter receptacle 8 3 0
Aluminum body and aluminum lter receptacle 8 4 0
Stainless steel body and plastic lter receptacle 8 6 0
Stainless steel body and stainless steel lter receptacle 8 7 0
For details on the Type4708-45 Supply Pressure Regulator (with increased air capacity), see
uEB8546-1.
3.2 Technical data
Table1: Technical data 1)
SupplyPressureRegulator Type4708-xx
Supply pressure 1.6 to 12bar (24 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 ≤0.05mn³/h
Dependency on inlet pressure < 0.01bar/Δp = 1bar
Reversing error 0.1 to 0.4 bar (depending on set point)
Hysteresis < 0.1bar
Filter cartridge mesh size 20µm · Optionally 5µm
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
Degree of protection IP65
1) Values measured for Type4708-xx with ¼” connection and for Type4708-45 with ½” connection
Note

16 EB 8546 EN
Design and principle of operation
Table2: Materials
SupplyPressureRegulator Type4708-xx
Body Metal parts Aluminum (3.3547, anodized) or stainless steel (1.4404)
Plastic parts Polyamide, glass ber reinforced
Cover Polyamide, glass ber reinforced
Cap Polyamide, glass ber reinforced
Plug Polyamide, glass ber reinforced and polyoxymethylene
Diaphragm NBR · FVMQ for low-temperature version
Diaphragm plate Polyamide, glass ber reinforced or aluminum
Set point spring 1.4310
Filter receptacle1) UV-resistant polyamide (Grilamid TR90UV),
aluminum (3.3547) or stainless steel (1.4404)
Filter cartridge 20µm: polypropylene · 5µm: stainless steel
Pressuregauge
Housing Stainless steel
Connection and measuring
element Nickel-plated brass or stainless steel for copper-free version
1) See Data Sheet uT8546/article code for material version
Table3: Ambient temperature ranges
Type4708- 10 11 12 13 14 17 53 54 55 62 64 82 83 84 86 87
Version for standard temperatures
–25 to +70°C 1) • • • • • •
–25 to +80°C • ••••••• • •
Version for low temperatures
–40 to +80°C •
–50 to +70°C1) • • • • • •
–50 to +80°C • • • • • • • • •
1) Applies also to rotating supplementary lter
Table4: Weights
Type4708- 10 11 12 13 14 17 53 54 55 62 64 82 83 84 86 87
kg
(approx.)
0.48 0.58 0.66 1.65 1.2 1.0 0.68 0.95 0.37 0.4 0.5 0.4 0.24 0.32 0.59 0.95

EB 8546 EN 17
Design and principle of operation
3.3 Spareparts
ÎSee Fig.2 on page13.
Articles Order numbers
Filter
Filter cartridge (11) 20µm, polyethylene
Filter cartridge (11) 5µm including seal, polyethylene
Filter cartridge (11) 5µm, sintered stainless steel
8504-9027
8504-9030
1400-9609
Filter parts
Screw (11.1)
Cap (11.2)
Shroud (11.3)
Air deector (11.4)
8336-0790
0339-0018
0339-0017
0339-0016
Filter receptacle and screw plug
Filter receptacle (13), plastic1)
Filter receptacle (13), aluminum1)
Filter receptacle (13), stainless steel1)
Screw plug (12)
1199-0423
1199-0424
1199-0425
0079-0143
Seals for lter receptacle (12.1)
For Type4708 -10 -11 -12 -13 -14 -17 -53 -54 -55 -62 -64
PVMQ •• ••••••• 8421-9123
NBR (free of silicone) •• ••••••• 8421-0099
PVMQ • • 0439-0309
NBR (free of silicone) • • 0439-0061
Pressure gauges
Pressure gauge, entirely made of stainless steel (0 to 6bar)
Pressure gauge, made of brass/stainless steel (0 to 6bar)
Lock nut
0089-0009
0089-0018
0250-1949
Pressure gauge seal 1099-4305
Pressure gauge, entirely made of stainless steel (0 to 1.6bar)
Pressure gauge, made of brass/stainless steel (0 to 1.6bar)
Pressure gauge, entirely made of stainless steel (0 to 1.6bar), including pressure
compensation element
Pressure gauge, made of brass/stainless steel (0 to 1.6bar), including pressure
compensation element
Pressure gauge, entirely made of stainless steel (0 to 6bar), including pressure
compensation element
Pressure gauge, made of brass/stainless steel (0 to 6bar), including pressure
compensation element
0089-0014
0089-0008
0089-0027
0089-0028
0089-0025
0089-0026
1) Version compatible with paint on request

18 EB 8546 EN
Design and principle of operation
3.4 Accessories
Accessories Order no.
Mounting parts for rail mounting according to EN50022
according to EN50035
1400-7341
1400-7342
Mounting parts for mounting on bracket for Type3271 or Type3277
Actuator 1402-0157
Intermediate plate for additional connection with Type4708-10xx/-11xx/-53xx/-55xx/-62xx Supply
Pressure Regulator (not required for Type4708-54xx)
Aluminum with G¼ thread
Aluminum with ¼NPT thread
Stainless steel with G¼ thread
Stainless steel with ¼NPT thread
1400-7400
1400-7404
1400-7402
1400-7406
Special screw to mount Type4708-54xx on Type3710 Reversing Amplier 1400-7806
Adjustment knob for set point adjustment 1400-7408
Nut for panel mounting 1400-7725
Adapter plate for manual/automatic switchover (Type4708-82)
Aluminum with G¼ thread
Aluminum with ¼NPT thread
Stainless steel with G¼ thread
Stainless steel with ¼NPT thread
1400-9605
1400-9606
1400-9607
1400-9608
Adapter plate (from Type3710) to mount Type4708-53 on all old versions of
Types3766, 3767 or 3780 Positioner 1400-9621
Filter cartridge 5µm, sintered stainless steel (replacement part) 1400-9609
Rotating supplementary lter1) for Type4708-53 and Types4708-55 to -64:
Temperature range: –25 to +70°C
Temperature range: –50 to +70°C
1402-1132
1402-1133
Grease for silicone-free version
Grease for natural gas version
Grease for low-temperature version
1402-1149
1402-1150
1402-1151
Pressure gauge bracket for Type4708-55 Supply Pressure Regulator 1402-1515
Pressure gauge mounting kit up to max. 6 bar (output/supply)
Stainless steel/brass
Stainless steel/stainless steel
1402-0938
1402-0939
1) Year of manufacture 2017 onwards

EB 8546 EN 19
Design and principle of operation
3.5 Dimensions in mm
(specications in parentheses apply to additional compressed air connection, see
page26)
166
19
80
53
43
Output or Supply
Supply or Output
44
60
88 (112)
19
51
43 53
80
44
60
Output or Supply
Output or Supply
Types4708-10xx/-17xxTypes4708-11xx/14xx

20 EB 8546 EN
Design and principle of operation
106
8
195
73
110
67
Output
Supply
70
80
28
51
7.7
75 (99)
Supply
Output
Type4708-54xxmountedontoType3725Positioner
Type4708-53xxmountedontoTypes376xand373xPositioners