Samson 4708-45 Service manual
Translation of original instructions
EB 8546-1 EN
Type4708-45 Supply Pressure Regulator
Edition April 2020
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
(aftersalesservice@samsongroup.com).
The mounting and operating instructions for the devices are included
in the scope of delivery. The latest documentation is available on our
website at www.samsongroup.com > Service & Support > Downloads >
Documentation.
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
EB 8546-1 EN
Contents
EB 8546-1 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 ..................................................................9
3.1 Technical data .............................................................................................10
3.2 Dimensions in mm........................................................................................12
3.3 Accessories/spare parts ...............................................................................14
4 Measures for preparation............................................................................15
4.1 Unpacking ..................................................................................................15
4.2 Storage.......................................................................................................15
5 Mounting the supply pressure regulator .......................................................16
5.1 Pneumatic connections..................................................................................16
5.1.1 Pressure gauge ............................................................................................16
5.2 Adjusting the set point..................................................................................17
6 Servicing.....................................................................................................18
6.1 Maintenance ...............................................................................................18
6.2 Preparation for return shipment.....................................................................18
7 Malfunctions ...............................................................................................19
8 Decommissioning and removal ....................................................................20
8.1 Decommissioning.........................................................................................20
8.2 Removing the supply pressure regulator.........................................................20
8.3 Disposal......................................................................................................20
9 After-sales service .......................................................................................21
4 EB 8546-1 EN
EB 8546-1 EN 5
Safety instructions and measures
1 Safety instructions and measures
Intended use
The Type4708-45 Supply Pressure Regulator reduces and controls the maximum pressure of
12bar (180psi) in a compressed air network to the pressure adjusted at the set point
adjuster. The device is designed to operate under exactly dened 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 specied, 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 Type4708-45 Supply Pressure Regulator is not suitable for the following applications:
−Use outside the limits dened 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 specied by SAMSON
Qualications of operating personnel
The supply pressure regulator must be mounted, started up and serviced by fully trained and
qualied personnel only; the accepted industry codes and practices must 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 de-
vice.
6 EB 8546-1 EN
Safety instructions and measures
ÎObserve the requirements for personal protective equipment specied in the valve docu-
mentation.
ÎCheck with the plant operator for details on further protective equipment.
Revisions and other modications
Revisions, conversions or other modications 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. Fur-
thermore, 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 parties 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 specied 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 fulll 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 8546-1 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 specied 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 8546-1 EN
Markings on the device
2 Markings on the device
Article code
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
EB 8546-1 EN 9
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 12bar pressure of the compressed
air network in a plant is reduced to an
adjustable minimum pressure between 0.5
and 6bar.
The compressed air at the inlet (supply) ows
across the lter and leaves the output at 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)
10 EB 8546-1 EN
Markings on the device
3.1 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
Perm. 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
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