Samson Type 4708 Service manual

Mounting and
Operating Instructions
EB 8546 EN
Translation of original instructions
Edition March 2016
Type4708-12
Type4708-53 Type4708-64
Type4708 Supply Pressure Regulator

2 EB 8546 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 EN 3
1 General safety instructions.............................................................................5
2 Design and principle of operation ..................................................................6
2.1 Versions ........................................................................................................8
2.2 Technical data ...............................................................................................9
2.3 Materials.....................................................................................................10
3 Mounting the supply pressure regulator .......................................................11
3.1 Compact supply pressure regulator................................................................11
3.1.1 Direction of ow ..............................................................................................
3.1.2 Turning the supply pressure regulator.............................................................12
3.2 Supply pressure regulators for attachment to positioners and actuators.............13
4 Pneumatic connections.................................................................................16
4.1 Pressure gauge ............................................................................................16
4.2 Additional output.........................................................................................17
4.3 Manual/automatic switchover.......................................................................19
4.3.1 Mounting on positioners ...............................................................................19
4.3.2 Mounting using an adapter plate ..................................................................20
4.3.3 Operating the manual/automatic switchover unit ...........................................21
4.4 Filter with lter receptacle .............................................................................21
4.4.1 Mounting the air lter...................................................................................21
4.5 Rotating supplementary lter.........................................................................22
4.5.1 Mounting the rotating supplementary lter .....................................................22
5 Adjusting the set point.................................................................................22
6 Maintenance ...............................................................................................23
7 Troubleshooting...........................................................................................24
8 Spare parts and accessories.........................................................................25
8.1 Spare parts .................................................................................................25
8.2 Accessories .................................................................................................26
9 Dimensions in mm.......................................................................................27
For details on the Type4708-45 Supply Pressure Regulator (with increased air capacity), see
uEB8546-1.
Note

EB 8546 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 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 0.2 to 1.6bar or
0.5 to 6bar.
At the inlet side, the supply pressure regula-
tor is equipped with a lter cartridge with a
mesh size of 20μm. In addition, the regula-
tor can also be equipped with a lter recep-
tacle and a pressure gauge on the outlet side.
12
5
3
1
21
20
Fig.1: Overview of 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 trans-
mitted to the diaphragm (2.1) over the con-
necting bore (1.3) and converted into a posi-
tioning force. This force is used to move the
valve plug depending on the force of the po-
sitioning 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 com-
pressed air can be collected and drained
when the lter cartridge (11) is mounted hor-
izontally or the lter receptacle (13) is sus-
pended downwards. The screw plug (12)
can be unscrewed or the manual drainage
(16) can be activated to drain condensed
water.

EB 8546 EN 7
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
2Plate
2.1 Diaphragm
3 Cover
3.1 Venting bore
4 Centering bushing
5 Cap
6Set point spring
7Set point screw
8Lock nut
11 Filter cartridge
11.1 Screw
11.2 Cap
11.3 Shroud
11.4 Air deector
12 Screw plug
12.1 Gasket
13 Filter receptacle
13.1 Gasket
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

8 EB 8546 EN
Design and principle of operation
2.1 Versions
Supply pressure regulator in
standard version
Type4708- xxxx
Aluminum lter
without lter receptacle 1 0
with plastic lter receptacle 1 1
with aluminum lter receptacle 1 2
Supply pressure regulator in stainless steel
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
Supply pressure regulator with adapter plate
for positioner
Types3730, 3766, 3767 5 3
Types3725, 3730, 3766, 3767 5 4
Type3725, Types4763/4765 5 5 0
Supply pressure regulator with adapter plate
for pneumatic actuator
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 con-
nection block 6 4 0
Manual/automatic switchover
Bypass for positioner 8 2
Filter without pressure gauge
Type4708- xxx0
Aluminum body and plastic l-
ter 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 stain-
less steel lter receptacle 8 7 0

EB 8546 EN 9
Design and principle of operation
2.2 Technical data
Supply pressure regulator Type4708-xx
Values measured with ¼” connection
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
Ambient temperature ranges
Type4708 -10 -11 -12 -13 -14 -17 -53 -54 -55 -62 -64 -82 -83 -84 -86 -87
Standard –25 to +70°C1) • • • • • •
–25 to +80°C • ••••••• • •
Low-tem-
perature
version
–40 to +80°C •
–50 to +70°C1) • • • • • •
–50 to +80°C • • • • • • • • •
1) Applies also to rotating supplementary lter
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

10 EB 8546 EN
Mounting the supply pressure regulator
3.2 Materials
Supply pressure regulator Type4708-xx
Body Metal parts Aluminum 1) (3.3547) 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2) UV-resistant polyamide (Grilamid TR90UV),
aluminum (3.3547) or stainless steel (1.4404)
Filter cartridge 20μm: polypropylene · 5μm: stainless steel
Pressure gauge
Body Stainless steel
Connection and
measuring element Nickel-plated brass or stainless steel for copper-free version
1) Anodized
2) See Data Sheet uT8546/article code for material version
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.
ÎMake sure the drain plug faces down-
wards in versions with a lter receptacle.
3.1 Compact supply pressure
regulator
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8.2).
Observe the direction of ow of the supply
air. An arrow on the nameplate indicates the
direction.

EB 8546 EN 11
Mounting the supply pressure regulator
3.1.1 Directionofow
In the compact supply pressure regulators
(Types4708-10xx/-11xx/-14xx and
-17xx), the direction of ow can be changed
as follows:
1. Unscrew the two fastening screws and lift
the supply pressure regulator off its con-
necting plate.
2. Remove the diverting gasket, turn it 180
degrees and reposition it as shown in
Fig.3.
ÎThe long rubber nger of the gasket must
always point in the direction of the regu-
lator outlet.
3. Fasten the supply pressure regulator onto
the connecting plate.
4. Stick the adhesive label included in the
accessories over the arrow of the name-
plate, making sure that the arrow indi-
cates that the supply air ows in the op-
posite direction.
G
4708-112.
06
3-....
06
3-....
4708-112.
G
Connecting plate
Standard label
Gasket
Connecting plate
Adhesive label with arrow
Fastening screws
Long rubber nger always pointing towards the regulator outlet
Supply
pressure
regulator
Fig.3: Changing the direction of ow in compact supply pressure regulators

12 EB 8546 EN
Mounting the supply pressure regulator
3.2.1 Turning the supply pres-
sure regulator
The supply pressure regulator can be turned
on its connecting plate to allow the set point
screw to face either up or down.
1. Unscrew the two fastening screws and lift
the supply pressure regulator off its con-
necting plate.
2. Pull the diverting gasket out of the regu-
lator and keep it in this position.
3. Turn the regulator 180 degrees and rein-
sert the gasket. In this way, you keep the
bore assignment of the gasket for supply
air input and regulator outlet.
ÎThe long rubber nger of the gasket must
always point in the direction of the regu-
lator outlet (reduced supply pressure).
4. Fasten the supply pressure regulator onto
the connecting plate.
Diverting gasket
Front and back view
Regulator outlet
Supply air input
depending on the
position of the
gasket
Regulator outlet (long rubber nger)
Supply air input
Regulator facing upward
Supply air input
(Supply) >
Diverting gasket
Long rubber nger
always pointing
towards outlet
Regulator facing downward
Fastening screws
Connecting plate or adapter plate
Fig.4: Turning the supply pressure regulator on its connecting plate or adapter plate

EB 8546 EN 13
Mounting the supply pressure regulator
3.3 Supply pressure regulators
for attachment to posi-
tioners and actuators
The supply pressure regulator versions in-
tended for attachment to positioners and ac-
tuators are equipped with various adapter
plates for the attachment.
If required, the installation position of the
supply pressure regulator can be changed
by turning it 180° on its adapter plate to al-
low the set point screw to face either up or
down.
This applies particularly to positioners that
can be mounted either to the left or right side
of the valve yoke to determine the operating
direction and fail-safe action of the actuator.
To turn the supply pressure regulator, pro-
ceed as described in section3.2.1.
The regulator is turned on its adapter plate
instead of on the connecting plate.
Supply pressure regulator for positioner
Type3730/3766/3767/3787
Type4708-53xx for Type3271 Actuator
and Type3277 Actuator (120, 240 to
700cm²) with hooked-up valve accessories
1. Insert the gasket (2) into the recess of the
adapter plate (1).
2. Place the supply pressure regulator on
the positioner on the side where the
pneumatic connections SUPPLY and
OUTPUT are located. Screw tight using
the two M5 screws (3).
Type4708-54xx for rotary actuators
Proceed to mount as Type4708-53xx.
Type4708-54xx has a second output sealed
with a stopper. This is intended for reduced
supply air. It can be used to supply a second
device, if required (e.g. a pilot-operated so-
lenoid valve).
Type4708-53xx
Type4708-54xx
Fig.5: Attachment on positioners

14 EB 8546 EN
Mounting the supply pressure regulator
Type4708-55xxforTypes3725,4763,
and 4765 Positioners
1. Screw the special nuts (5) into the connect-
ing holes of the positioner.
2. Insert the gasket (2) into the recess of the
adapter plate (1).
3. Slide the special hollow screws (6) for
SUPPLY and (7) for OUTPUT into the con-
necting holes of adapter plate (1).
4. Place the supply pressure regulator onto
the positioner and fasten it using the two
special screws.
5. Seal the spare connections with stoppers
(4) to prevent dirt from entering the de-
vice.
Type4708-64xxforType3277Actuator
Before mounting, check whether the tip of
the gasket (1.2) projecting from the side of
the connection block (1) is positioned to
match the actuator symbol (1.3) for the actu-
ator's fail-safe action "actuator stem ex-
tends" or "actuator stem retracts". If this is
not the case, proceed as follows:
1. Unscrew the three Phillips screws (3.1),
lift off the cover (1.1). Turn the gasket
(1.2) by 180° and re-insert it. Continue
with reassembly.
2. Place the connection block (1) with the
inserted O-ring against the positioner
and actuator yoke and fasten using the
hexagonal socket screw (3).
3. Place the supply pressure regulator with
O-ring on the connection block and fas-
ten it with hexagonal socket screw (2).
6
0
SAMSON 4763
4708-552.
6
0
1
7
6
5
5
2
1
4
4
10
1
7
9
6
1
5
5
Fig.6: Attachment to Types4763 and 4735
Positioners
2
3
1
1
3.1
3.1
1.2
1.3
1.3
1.1
1.2
Fig.7: Mounting on Type3277 Actuator

EB 8546 EN 15
Mounting the supply pressure regulator
Type4708-62xxforType3372Actuator
1. Screw the special nut (5) into the SUPPLY
connecting hole of the actuator.
2. Slide the special hollow screw (6) into the
connection hole of the adapter plate.
3. Insert the O-ring (9). Position the supply
pressure regulator and fasten it to the ac-
tuator using the special screw.
4. Seal the spare connections with stoppers
(4) to prevent dirt from entering the de-
vice.
1
9
5
6
4
1
6
5
9
4
Fig.8: Mounting on Type3372 Actuator

16 EB 8546 EN
Pneumatic connections
4 Pneumatic connections
The air connections are designed either with
G¼ or ¼-18NPT threads. On compact
supply pressure regulators, an arrow on the
adhesive label indicates the direction from
the supply air input to the output.
In supply pressure regulators with two con-
necting holes in the adapter plate (Fig.5
and Fig.6), the supply air connection is
marked SUPPLY.
The positioner's output signal is routed in
these versions over the OUTPUT port through
the adapter plate to the actuator.
4.1 Pressure gauge
When attaching the pressure gauge, make
sure that a gap of 2 to 3mm remains be-
tween the lock nut (20) and pressure gauge’s
square on tightening the lock nut.
For Types4708-12xx/13xx (compact ver-
sions), additionally make sure that the blank-
ing plug (23) is only screwed in until it is
ush with the body. Otherwise, the gaskets
(21, 22) will be damaged. Each gasket is as-
signed either to the pressure gauge or to the
screw plug and must be changed corre-
spondingly if you change the location of the
pressure gauge and screw plug to the other
side.
20 22
2...3 mm 0 mm
21 23
Fig.9: Mounting the pressure gauge, e.g. Types4708-12xx/-13xx (compact version)

EB 8546 EN 17
Pneumatic connections
4.2 Additional output
An additional output for reduced air pres-
sure is required to allow the supply pressure
regulator to supply two pneumatic devices.
In some versions of Type4708 (see section
8.2 on accessories), a second output can be
made available by using an intermediate
plate.
Example: Pneumatic actuator with positioner
and pilot-operated solenoid valve
ÎThe supply air must be supplied sepa-
rately to the pilot control.
The reduced supply pressure of the supply
pressure regulator is additionally routed to
the threaded connection at the side over the
corresponding holes in the intermediate
plate.
All versions can be ordered made of alumi-
num or stainless steel and with either G or
NPT threads. See section8.2.
1
1.1
A
A
A
E
SUPPL
Y
2
2.1
3
4
E
E
Output for reduced
supply air
Intermediate plate (2) with
additional connection
Fig.10:Mounting an intermediate plate for Types3730, 3766 and 3767 Positioners

18 EB 8546 EN
Pneumatic connections
Mounting the intermediate plate
1. Remove the fastening screws and lift the
supply pressure regulator (4) together
with the diverting gasket (3) off the
adapter plate (1). Make sure you do not
change the position of the diverting gas-
ket in the supply pressure regulator.
ÎThe long rubber nger of the diverting
gasket (3) must always point toward the
regulator outlet (reduced supply pres-
sure). See Fig.10 and Fig.11.
2. Insert the O-rings (2.1) into the bore-
holes of the intermediate plate (2).
3. Place the intermediate plate onto the
connecting or adapter plate in such a
way that their three boreholes (arranged
in row) are located over the two 5mm
boreholes of the adapter plate and the
boreholes (1.1) for the fastening screws
are aligned correctly.
4. Place the supply pressure regulator (4)
with the diverting gasket (3) onto the in-
termediate plate (2). Insert the longer
fastening screws and fasten the parts.
1
1.1
E
A
2
2.1
3
A
A
E
A
E
4
Output for reduced air
Supply air input
2
Fig.11:Mounting an intermediate plate onto Type3372 Actuator

EB 8546 EN 19
Pneumatic connections
4.3 Manual/automatic
switchover
The positioner output is routed to the actua-
tor over the manual/automatic switchover. In
automatic mode, the positioner is in closed-
loop operation. In manual mode, the output
pressure of any supply pressure regulator is
directly applied to the actuator. This creates
a manual bypass of the positioner.
The manual/automatic switchover unit is
mounted directly onto Types376x and 373x
(see Fig.12) or on an adapter plate with
hook-up to the actuator (Fig.15).
The Type4708-53 or Type4708-54 Supply
Pressure Regulator can be directly mounted.
All other supply pressure regulators can be
connected to the manual/automatic switcho-
ver unit using piping (hook-up).
4.3.1 Mounting on positioners
Fig.12:Mounting on positioners
−Insert gasket into recess of the manual/
automatic switchover unit.
−Fasten the manual/automatic switchover
unit to the positioner using the two hex-
agonal socket screws.
−Connect hook-up to the SUPPLY and
OUTPUT connections of the manual/au-
tomatic switchover unit.
1Pneumatic control valve with
positioner
2Adapter plate:
1400-9605 (G),
1400-9606 (NPT)
3 Type4708-82 Manual/
automatic Switchover in AUTO
mode
4Supply pressure regulator with
lter (e.g. Type4708-10)
Output (38)
Supply (9)
Supply
Output
1
2
3
4
Fig.13:Mounting the manual/automatic switchover using an adapter plate

20 EB 8546 EN
Pneumatic connections
Optionally, a Type 4708-53 Supply Pressure
Regulator can be mounted upstream of the
manual/automatic switchover unit (Fig.14).
Fig.14:Type4708-82 Manual/automatic
Switchover, Type4708-53 Supply
Pressure Regulator with pressure gauges
and lter receptacle
4.3.2 Mounting using an
adapter plate
−Fasten adapter plate, for example to a
NAMUR rib using a hexagonal socket
screw.
−Fit the gasket on the manual/automatic
switchover unit. Fasten it to the adapter
plate using the two hexagonal socket
screws.
Fig.15:Mounting using an adapter plate
−Connect hook-up for positioner and actu-
ator as shown in Fig.13.