Page 1
Supply Pressure Regulators
Type 4708
Mounting and
Operating Instructions
EB 8546 EN
Edition June 2012
Fig. 1 · Supply pressure regulators
Type 4708-1152 with filter receptacle
Type 4708-5352 on Type 3730 Positioner
Type 4708-6252 on Type 3372 Actuator
Page 2
Contents Page
1 Design and principle of operation. . . . . . . . . . . . . . . . . . . . 4
1.1 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Mounting the supply pressure regulator. . . . . . . . . . . . . . . . . 8
2.1 Compact supply pressure regulator . . . . . . . . . . . . . . . . . . . 8
2.1.1 Direction of flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.2 Turning the supply pressure regulator . . . . . . . . . . . . . . . . . . 9
2.2 Supply pressure regulators for attachment to positioners and actuators. . 10
3 Pneumatic connections . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Additional connection for a solenoid valve . . . . . . . . . . . . . . . 15
3.3 Manual/automatic transfer. . . . . . . . . . . . . . . . . . . . . . . 18
3.3.1 Mounting on positioners . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.2 Mounting using an adapter plate. . . . . . . . . . . . . . . . . . . . 19
3.3.3 Operating the manual/automatic transfer . . . . . . . . . . . . . . . 20
3.4 Filter with filter receptacle . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.1 Mounting the air filter . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5 Rotatable supplementary filter . . . . . . . . . . . . . . . . . . . . . 21
3.5.1 Mounting the rotatable supplementary filter. . . . . . . . . . . . . . . 21
4 Set point adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Dimensions in mm. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2 EB 8546 EN
Contents
Page 3
EB 8546 EN 3
Safety instructions
General safety instructions
4
The supply pressure regulators may only be mounted, started up or serviced
by fully trained and qualified personnel, observing the accepted industry
codes and practices. Make sure employees or third persons are not exposed
to any danger. All safety instructions and warnings in these mounting and
operating instructions, particularly those concerning assembly, start-up and
maintenance, must be observed.
4
Proper shipping and appropriate storage of the regulators are assumed.
Page 4
1 Design and principle of
operation
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 regula-
tor is equipped with a filter cartridge with a
mesh size of 20 µm. In addition, the regulator can also be equipped with a filter receptacle and a pressure gauge on the outlet
side.
The compressed air at the inlet flows across
the filter and through the free cross-sectional
area between the seat (1.1) and plug (1.2).
It leaves the outlet with a reduced pressure
depending on the plug position.
The output pressure to be controlled is transferred through the bore (1.3) to the operating diaphragm (2) where it is converted into
a positioning force. This force is used to
move the valve plug depending on the force
of the positioning spring (4).
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 (4).
Condensed water contained in the compressed air can be collected and drained
when the filter cartridge (9) is mounted horizontally or the filter receptacle (12) is suspended downwards. The stopper (10) can
be unscrewed or the manual drainage can
be activated (drain plug (15) in old versions)
to drain condensed water.
Note: Tighten the drain plug by hand only.
The maximum permissible tightening torque
is 3 Nm.
4 EB 8546 EN
Design and principle of operation
Page 5
EB 8546 EN 5
Design and principle of operation
15
1.11 1.2 1.3 2 3 4 5 6 7 8
9
10
10.1
11
11.1
12.1
12
13
9
16
Fig. 2 · Sectional drawings
1 Body
1.1 Seat
1.2 Plug
1.3 Bore in body
2 Operating diaphragm
3 Venting bore
4 Positioning spring
5 Cap
6 Lock nut
7 Set point screw
8 Adjustment knob
(accessories in Section 7)
9 Filter cartridge
10 Stopper
11 Bushing
11.1 Gasket
12 Filter receptacle
12.1 Gasket
13 Screw
15 Drain plug (max. 3 Nm)
16 Manual drainage
Old version
Adapter plate/connecting plate
Diverting gasket
Page 6
1.1 Versions
Standard version Type 4708-
xxxx
Filter on aluminum basis without
filter receptacle
10
With plastic filter receptacle
11
With aluminum filter receptacle
12
Stainless steel supply pressure regulator
Filter on stainless steel basis with
stainless steel receptacle
13
With plastic filter receptacle
14
Without filter receptacle
17
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,
copper-free housing
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,
copper-free housing
5
Supply pressure regulator with adapter plate
for positioners
Type 3730, 3766, 3767, 3780,
3785, 3787
53
Type 3730, 3766, 3767, 3780,
3785, 3787
54
Type 4763/4765
55 0
Type 3760
57
Type 3761
58
Supply pressure regulator with adapter plate
for pneumatic actuators
Type 3277 (240 to 700 cm²)
with Type 3730, 3766, 3767,
3780, 3785 or 3787 Positioner
62 0
Type 3372
62
Type 3277 with connection
block
64
Manual/automatic transfer
Bypass for positioner
82
Filter without pressure gauge
Type 4708-
xxx0
Aluminum housing and plastic
filter receptacle
83 0
Aluminum housing and aluminum filter receptacle
84 0
Stainless steel housing and
plastic filter receptacle
86 0
Stainless steel housing and
stainless steel filter receptacle
87 0
6 EB 8546 EN
Design and principle of operation
Page 7
1.2 Technical data
EB 8546 EN 7
Design and principle of operation
Supply pressure regulator Type 4708-xx
Supply pressure
1 bar (15 psi) above the adjusted set point,
however, at least 1.6 bar (24 psi) · Max. 12 bar (180 psi)
Output pressure Adjustable from 0 to 1.6 bar (0 to 24 psi) or 0 to 6 bar (0 to 90 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
£
0.05 m
n
3
/h (with 7 bar supply air)
Permissible ambient
temperature
(values in brackets apply to
low-temperature version)
–25 to 70 °C (–50 to 70 °C) for Types 4708-11, -14, -45, -83, -86
–25 to 80 °C (–40 to 80 °C) for Type 4708-64
–25 to 80 °C (–50 to 80 °C) for Types 4708-10, -12, -13, -17, -53, -54, -55, -57,
-58, -62, -82, -84, -87
(–30 °C possible, but in this case, air consumption reaching up to 0.3 m
n
3
/h with
7 bar supply pressure)
Input pressure dependance < 0.01 bar/Dp = 1 bar
Reversing error 0.1 bar to 0.4 bar (depending on the set point)
Hysteresis < 0.1 bar
Pressure gauge Ø40
indication range
0 to 1.6 bar (0 to 24 psi) or 0 to 6 bar (0 to 90 psi)
Connection G
1
8
Type 4708- 10 11 12 13 14 17 53 54 55
Weight, approx. 0.48 0.58 0.66 1.65 1.2 1.0 0.68 0.95 0.37
Type 4708- 57 58 62 64 82 83 84 86 87
Weight, approx. 0.47 0.4 0.4 0.5 0.4 0.24 0.32 0.59 0.95
Materials
Body Polyamide, glass fiber reinforced
Adapter plate Aluminum alloy, anodized black
Stopper and gasket Polyamide, glass fiber reinforced and NBR
Cover Polyamide, glass fiber reinforced
Cap Polyamide, glass fiber reinforced
Plug Polyamide, glass fiber reinforced and polyoxymethylene
Plug sealing NBRT and VMQ
Diaphragm NBR
Diaphragm plate Polyamide, glass fiber reinforced
Filter cartridge 20 µm: Polypropylene · 5 µm: Stainless steel
Pressure gauge
Housing
Connection
Stainless steel
St. steel (version free of copper)
Brass, nickel-plated
Page 8
2 Mounting the supply
pressure regulator
To prevent excessive amounts of condensed
water from collecting, the distance between
the compressor and supply pressure regulator should be kept as short as possible.
Make sure the drain plug faces downwards
in versions with a filter receptacle.
2.1 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 corresponding mounting parts (see accessories
table in section 7).
Observe the direction of flow of the supply
air. An arrow on the nameplate indicates
the direction.
2.1.1 Direction of flow
In the compact supply pressure regulators
4708-10xx/-11xx/-14xx and -17xx the
direction of flow can be changed as follows:
1. Unscrew both fixing screws and lift the
supply pressure regulator off its connecting plate.
2. Remove the diverting gasket, turn it
180 degrees and reposition it as shown
in Fig. 3.
Note: The long rubber finger of the gasket must always point in the direction of
the regulator outlet.
3. Fasten the supply pressure regulator
onto the connecting plate.
4. Stick the enclosed adhesive label over
the arrow of the nameplate, ensuring the
arrow indicates that the supply air flows
in the opposite direction.
8 EB 8546 EN
Mounting the supply pressure regulator
G
4708-112.
0
6
3-....
0
6
3-....
4708-112.
G
Fig. 3 · Changing the direction of flow in compact supply pressure regulators
Connecting plate
Standard label
Diverting gasket
Connecting plate
Label with arrow
Fixing screws
Long rubber finger always pointing towards the regulator outlet
Supply
pressure
regulator
Page 9
2.1.2 Turning the supply pressure
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 both fixing screws and lift the
supply pressure regulator off its connecting plate.
2. Pull the diverting gasket out of the regu-
lator and keep it in this position.
3. Turn the regulator 180 degrees and reinsert the gasket. In this way, you keep
the bore assignment of the gasket for
supply air input and regulator outlet.
Note: The long rubber finger of the gasket must always point in the direction of
the regulator outlet (reduced supply
pressure).
4. Fasten the regulator onto the connecting
plate.
EB 8546 EN 9
Mounting the supply pressure regulator
Fig. 4 · Turning the supply pressure regulator on its connecting plate or adapter plate
Supply air input
Connecting plate or adapter plate
Supply air input
(Supply) >
Regulator facing downward
Diverting gasket
Long rubber finger
always pointing
towards outlet
Regulator facing upward
Fixing screws
Regulator outlet
Diverting gasket
Front and back view
Regulator outlet (long rubber finger)
Supply air input
depending on the
position of the
gasket
Page 10
2.2 Supply pressure regulators
for attachment to positioners
and actuators
The supply pressure regulator versions intended for attachment to positioners and actuators 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 allow the set point screw/adjustment knob to
face either up or down. This applies particularly for positioners which can be attached
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, proceed as described for the compact supply
pressure regulator in section 2.1.2. The regulator is turned on its adapter plate instead
of on the connecting plate.
Regulators for Types 3730/3766/3767/
3780/3785/3787 Positioners
Type 4708-53xx for Type 3271 Actuator
and Type 3277 Actuator with 120 cm² as
well as 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
both 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 solenoid valve).
10 EB 8546 EN
Mounting the supply pressure regulator
Fig. 5 · Attachment onto positioners
Type 4708-53xx
73
194
111
Type 4708-54xx
Page 11
Type 4708-55xx for Type 4763 and
Type 4765 Positioner
1. Screw the special nuts (5) into the connecting holes of the positioner.
2. Insert the gasket (2) into the recess of the
adapter plate (1).
3. Push the special hollow screws (6) for
SUPPLY and (7) for OUTPUT into the
connecting holes of adapter plate (1).
4. Place the supply pressure regulator onto
the positioner and fasten it using both
special screws.
5. Seal the spare connections with stoppers
(4) to prevent dirt from entering the device.
Type 4708-57xx for Type 3760 Positioner
The attachment for a positioner mounted on
the left side of the valve yoke (seen from the
black switchover plate) is shown. For a
positioner mounted on the right side, the
adapter plate is attached in the same way,
except the supply pressure regulator must be
turned by 180° (see bottom of page 28).
1. Screw the special nuts (5) into the connecting holes of the positioner.
2. Insert the O-rings (9) into the recess of
the adapter plate (1).
3. Push the special hollow screws (6) for
SUPPLY and (7) for IN. SIGNAL into
connecting holes of adapter plate (1).
4. Place the supply pressure regulator onto
the positioner and fasten it using both
special screws.
5. Seal the IN. SIGNAL connection of i/p
positioner with stainless steel stopper
(10).
6. Seal the spare connections with stoppers
(4) to prevent dirt from entering the device.
EB 8546 EN 11
Mounting the supply pressure regulator
6
0
SAMSON 4763
4708-552.
6
0
G
1
7
6
5
5
2
1
4
4
10
1
7
9
6
1
5
5
Fig. 6 · Attachment to positioners
Switchover
plate
Page 12
Type 4708-58xx for Type 3761 Positioner
1. Screw the special nut (5) into the SUPPLY
connecting hole of the positioner.
2. Push the special hollow screw (6) into
the connection hole of the adapter plate
(1).
3. Insert the O-ring (9). Position the supply
pressure regulator and fasten it to the
positioner using the special screw.
4. Seal the spare connections with stoppers
(4) to prevent dirt from entering the device.
Type 4708-64xx for Type 3277 Actuator
Before attaching the supply pressure regulator, check whether the tongue of the gasket
(1.2) is aligned at the connection block (1)
in such a way that the actuator symbol (1.3)
indicating “Actuator stem extends” or “Actuator stem retracts” matches the fail-safe action of the actuator.
If this is not the case, proceed as follows:
1. Unscrew the three Phillips screws (3.1),
lift off the cover plate (1.1) and turn the
gasket (1.2) by 180° and reinsert it.
2. Place the connection block with inserted
O-ring on the positioner and actuator
yoke and fasten it with hexagonal socket
screw (3).
3. Place the supply pressure regulator with
O-ring on the connection block and fasten it with hexagonal socket screw (2).
12 EB 8546 EN
Mounting the supply pressure regulator
3
1
1.1
1.2
1.3
3.1
3.1
2 1
G3/8
1
38
238
G
Output
Output
S
Input
6
5
4
3
2
1
0
27
1
6
9
4
1
5
Fig. 7 · Attachment of supply pressure regulator
Page 13
Type 4708-62xx for Type 3372 Actuator
1. Screw the special nut (5) into the SUPPLY
connecting hole of the actuator.
2. Push the special hollow screw (6) into
the connecting hole of the adapter plate.
3. Insert the O-ring (9). Position the supply
pressure regulator and fasten it onto actuator using the special screw.
4. Seal the spare connections with stoppers
(4) to prevent dirt from entering the device.
EB 8546 EN 13
Mounting the supply pressure regulator
1
9
5
6
4
1
6
5
9
4
Fig. 8 · Attachment to Type 3372 Actuator
Page 14
3 Pneumatic connections
The pneumatic connections are designed either as G ¼ or ¼ NPT-18 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 connecting holes in the adapter plate (Figs. 5
and 6, top), 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.
3.1 Pressure gauge
Mount the pressure gauge in such a way
that there is a 2-3 mm gap between the lock
nut and pressure gauge's square end after
tightening the lock nut (20).
In the compact versions (Type 4708-12xx/
-13xx), make sure additionally that the
stopper (23) is only screwed in to the point
where it becomes aligned with the housing,
otherwise the gaskets (21, 22) will be damaged. Each gasket is assigned either to the
pressure gauge or to the stopper and must
be changed correspondingly if you change
the location of the pressure gauge and
stopper to the other side.
14 EB 8546 EN
Pneumatic connections
20 22
2...3 mm 0 mm
21 23
Fig. 9 · Pressure gauge attachment, e.g. with Type 4708-12xx/13xx Supply Pressure Regulators
Page 15
3.2 Additional connection for a
solenoid valve
An additional output for reduced air pressure is required to allow the supply pressure
regulator to supply two pneumatic devices.
In some versions of Type 4708 (see section 7 on accessories), a second output can
be made available by using an intermediate
plate.
Example: Pneumatic actuator with positioner
and pilot-operated
solenoid valveÞSupply
air must be supplied separately 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 supply pressure regulators have
the same intermediate plate, except for
Type 4708-57xx, designed for attachment
to Type 3760 Positioner (Fig. 12), its intermediate plate has a different hole assignment for the air ducts.
All versions can be ordered made of aluminum or stainless steel and with either G or
NPT threads. See section 7 for more details.
EB 8546 EN 15
Pneumatic connections
1
1.1
A
A
A
A
E
SUPPLY
2
2.1
3
4
4.1
E
E
E
Fig. 10 · Mounting an intermediate plate for Types 3730/3766/3767/3780 Positioners
Intermediate plate (2) with
additional connection
Output for
reduced supply air
Page 16
Mounting the intermediate plate
1. Remove the fixing 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 gasket in the supply
pressure regulator.
Note: The long rubber finger of the diverting
gasket (3) must always point in the direction
of the regulator outlet (reduced supply air).
See Figs. 10, 11 and 12.
2. Insert O-rings (2.1) in the holes of the intermediate plate (2).
3. Place the intermediate plate onto the
adapter plate in such a way that the
three holes located next to one another
are positioned over both 5 mm holes on
16 EB 8546 EN
Pneumatic connections
1
1.1
E
A
M
A
2
2.1
3
4
4.1
A
A
E
A
E
A
E
Fig. 11 · Mounting an intermediate plate on Type 3372 Actuator
Output for
reduced supply air
Supply air input
Intermediate
plate (2)
Page 17
the adapter plate and the bores (1.1) for
the fixing screws are aligned.
4. Place the supply pressure regulator (4)
with the diverting gasket (3) onto the intermediate plate (2). Insert the longer fixing screws and fasten the parts.
EB 8546 EN 17
Pneumatic connections
SUPPLY
A
M
A
2
1
2.1
1.1
E
E
3
E
4
4.1
E
A
A
A
A
Fig. 12 · Mounting an intermediate plate on Type 3760 Positioner
Page 18
3.3 Manual/automatic transfer
The positioner output is routed to the actuator over the manual/automatic transfer. 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 for the positioner.
The manual/automatic transfer unit is
mounted directly onto Types 376x, 378x
and 373x (Fig. 14) or on an adapter plate
with hook-up to the actuator (Fig. 13).
The Type 4708-53 (Fig. 15) or Type
4708-54 Supply Pressure Regulator can be
fastened onto the regulator. All other supply
pressure regulators can be connected to the
manual/automatic transfer by a piping
(hook-up).
3.3.1 Mounting on positioners
4
Insert flat gasket into recess of the manual/automatic transfer unit (Fig. 14).
4
Fasten manual/automatic transfer unit to
the positioner using the two hexagon
socket screws.
4
Connect hook-up to the Supply and Output connections of the manual/automatic
transfer unit.
18 EB 8546 EN
Pneumatic connections
1
Output (38)
Supply (9)
2
3
4
Supply
Output
Fig. 13 · Mounting the manual/automatic transfer using an adapter plate
1 Pneumatic control
valve with positioner
2 Adapter plate
1400-9605 (G)
1400-9606 (NPT)
3 Manual/automatic
transfer
Type 4708-82
in AUTO mode
4 Supply pressure regu-
lator with filter
(e.g. Type 4708-10)
Fig. 14 · Mounting on a positioner
Page 19
Optionally, a Type 4708-53 Supply Pressure Regulator can be mounted upstream of
the manual/automatic transfer unit
(Fig. 15).
3.3.2 Mounting using an adapter
plate
4
Fasten adapter plate, for example to a
NAMUR rib using a hexagon socket
screw.
4
Fit the flat gasket on the manual/automatic transfer unit. Fasten it to the
adapter plate using the two hexagon
socket screws.
4
Connect hook-up for positioner and actuator as shown in Fig. 13.
EB 8546 EN 19
Pneumatic connections
Fig. 15 · Type 4708-82 Manual/Automatic Transfer
Unit, Type 4708-53 Supply Pressure
Regulator with pressure gauges and
rotatable filter receptacle
Fig. 16 · Mounting using adapter plate
Page 20
3.3.3 Operating the manual/
automatic transfer
In normal operation, the manual/automatic
transfer runs in automatic mode, during
which the positioner supplies air to the
pneumatic actuator.
To switch to manual mode, twist off the plastic cap. Turn the switchover pin counterclockwise and pull it (approx. 1 cm) out of
the bayonet lock. The compressed air is then
routed directly from the supply pressure regulator or from the air supply network to the
pneumatic actuator.
To switch back to automatic mode, push in
the switchover pin again. To do this, insert
the lock pin completely into the bayonet and
lock it. Replace plastic cap and tighten.
3.4 Filter with filter receptacle
The Types 4708-83, 4708-84, 4708-86
and 4708-87 Air Filters are designed for
universal use. They have either G ¼ or
¼-18 NPT threaded connections.
3.4.1 Mounting the air filter
Mount the air filter directly into the pipeline,
while ensuring the direction of flow (printed
on the device) is kept.
The filter receptacle must face downwards to
function correctly.
20 EB 8546 EN
Pneumatic connections
Fig. 17 · Cap and switchover pin
Fig. 18 · Types 4708-83 to -87 Air Filters
Page 21
3.5 Rotatable supplementary
filter
The rotatable supplementary filter (see
Fig. 15) is designed for mounting to Type
4708-53 and Types 4708-55 to -64 Supply
Pressure Regulators. They replace the small
integrated filter cartridge. The entire filter
housing can be rotated by 360° to ensure
that the condensate drain is always facing
downwards.
Filter versions
Aluminum housing with filter in transparent
plastic receptacle
Temperature range: –
–20 to 70 °C
Order no. 1400-9460
Special version
Temperature range:
–40 to 70 °C
Order no. 1400-9461
3.5.1 Mounting the rotatable
supplementary filter
4
Remove the cover and filter cartridge
from the supply pressure regulator.
4
Place the supplied seal carefully onto the
groove (see arrow) of the connection.
4
Insert connecting pipe together with seal
into the supply pressure regulator and
tighten the plastic coupling nut.
Note: Make sure that the seal does not fall
out of the groove during mounting, otherwise the filter will not function properly.
4
Align the supplementary filter in the vertical direction.
4
Secure the position by tightening the
hexagonal socket screw (6 mm).
EB 8546 EN 21
Pneumatic connections
Fig. 19 · Connection and seal for supplementary filter
Page 22
4 Set point adjustment
(Fig. 2)
Depending on the version, the set point of
the supply pressure regulator can be adjusted either at the adjustment knob (8), or
after screwing off the cap (5), at the set
point screw (7).
4
Turning the knob or screw clockwise increases the output pressure and turning it
counterclockwise reduces the output
pressure.
4
Use the lock nut (6) to secure the setting.
Note: When using the version with the adjustment knob (8) to adjust the set point,
make sure that the Phillips screws are
screwed tight to prevent the knob from coming loose due to vibration.
5 Maintenance
(Fig. 2)
We recommend you check the filter as often
as possible.
Drain condensed water that has collected:
4
Remove the stopper (10) or
4
Unscrew the drain plug (15) by about
half a turn or
4
Activate the manual drainage (16).
Note: Tighten the drain plug by hand only.
The maximum permissible tightening torque
is 3 Nm.
When faults occur, e.g. a pressure drop, unscrew the stopper (10) or the filter receptacle
(12) and replace the filter cartridge (order
no. 8504-9027).
Prior to carrying out any maintenance work,
shut off the air supply!
In the version with a filter receptacle, screw
the fixing screw (13) tight so that the filter
cartridge sits properly. Replace the gasket
(12.1) order no. 0439-0061, if necessary.
In the versions 4708-11xx/14xx, do not unscrew the bushing (11), if at all possible. If,
however, you needed to unscrew it, you can
replace the gasket (11.1) order no.
0439-0287 as well.
If there is any leakage at the stopper (10),
the entire stopper including the seal (10.1)
must be replaced. Refer to section 6.1 on
spare parts.
22 EB 8546 EN
Set point adjustment
Page 23
6 Troubleshooting
4
Leakage between supply pressure regulator and adapter plate:
Check whether the diverting gasket
(Figs. 3 and 4) is installed and both fixing screws are tightened properly.
4
Excessive blow-off over the venting bore
(3 in Fig. 2):
Check whether the diverting gasket
(Figs. 3 and 4) is installed correctly.
4
The air supply decreases and the output
pressure drops:
Check the filter cartridge (9 in Fig. 2) for
dirt and make sure the set point is correctly adjusted.
6.1 Spare parts
EB 8546 EN 23
Troubleshooting
Article
Order no.
Filter
Filter cartridge 20 µm
Filter cartridge 5 µm including seal
8504-9027
8504-9030
Filter receptacle
Filter receptacle, plastic
Filter receptacle, aluminum
Filter receptacle, stainless steel
1199-0423
1199-0424
1199-0425
Filter compatible with paint on request
Seal for filter receptacle
0439-0061
Stopper including seal (10 and 10.1 in Fig. 2)
1099-5055
Pressure gauge
Pressure gauge, entirely made of stainless steel
Pressure gauge, made of brass/stainless steel
0089-0009
0089-0018
Pressure gauge seal
1099-4305
Page 24
7 Accessories
24 EB 8546 EN
Accessories
Accessories Order no.
Mounting parts for mounting on rail acc. to EN 50022
acc. to EN 50035
1400-7341
1400-7342
Mounting parts for mounting on bracket for Type 3271 or Type 3277 Actuator 1400-7343
Intermediate plate for additional connection
with Types 4708-10xx/-11xx/-53xx/-55xx/-58xx/-62xx/-64xx (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
Intermediate plate for additional connection with Type 4708-57xx Supply Pressure Regulator
Aluminum with G ¼ thread
Aluminum with ¼ NPT thread
Stainless steel with G ¼ thread
Stainless steel with ¼ NPT thread
1400-7401
1400-7405
1400-7403
1400-7407
Special screw to mount Type 4708-54xx on Type 3710 Reversing Amplifier 1400-7806
Adjustment knob for set point adjustment 1400-7408
Nut for panel mounting 1400-7725
Adapter plate for manual/automatic transfer (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 old models of Types 3733,
3767 and 3780 Positioners
1400-9621
Page 25
8 Dimensions in mm
EB 8546 EN 25
Dimensions in mm
79
524339
19
51
4460
90
126
78 (102)
79
5243
19
51
60 44
182 (206)
Type 4708-11xx/14xx Supply Pressure Regulator
Supply pressure regulators with intermediate plate
The overall height increases by 24 mm for the
additional connection.
In this case, the dimensions in parentheses () apply.
Mounting bracket
(accessories)
Type 4708-10xx/17xx Supply Pressure Regulator
Page 26
26 EB 8546 EN
Dimensions in mm
06
06
80
65(89)
Output
Supply
51
25
70
4708-535.
NPT
44
59
42
15
116
99
42
44
Ø41
102
123
12
59
Type 4708-12xx/13xx Supply Pressure Regulator
Type 4708-83xx/84xx/86xx/87xx
Supply Pressure Regulator
Type 4708-53xx Supply Pressure Regulator
for Types 3730/3766/3767/3780/3785/3787 Positioners
Page 27
EB 8546 EN 27
Dimensions in mm
73
192
111
66
96
19
3
Output
Supply
Type 4708-54xx Supply Pressure Regulator
for Types 3730/3766/3767/3780/3785/3787 Positioners
Type 4708-55xx
for Types 4763/4765 Positioners
G
6
0
SAMSON 4763
4708-552.
6
0
Output
Supply
66 (90)55
27
122
Output
(reduced supply)
Page 28
28 EB 8546 EN
Dimensions in mm
99 122
133 (157)
Supply
Input
Signal
Input
Signal
Supply
927
927
47
122
Type 4708-57xx Supply Pressure Regulator
for Type 3760 Positioner
Page 29
EB 8546 EN 29
Dimensions in mm
1
38
238
G
Output
Output
S
Input
6
5
4
3
2
1
0
SAMSON
27
60
(84)
Supply
56
111
30
93
74 207
111
125
113
37
125
Supply
G3/8
Type 4708-64xx
for Type 3277 Actuator
Attachment on left or right
Type 4708-58xx
for Type 3761 Positioner
Page 30
30 EB 8546 EN
Dimensions in mm
0
6
G
4708-622X
Supply
19 94
111(135)
113
60
Supply
113
Type 4708-6221
for Type 3372-031x Actuator
70
56
56
46
24
82
28
50
13
10
Type 4708-82
Manual/automatic transfer unit with adapter plate
Page 31
EB 8546 EN 31
Page 32
SAMSON AG · MESS- UND REGELTECHNIK
Weismüllerstraße 3 · 60314 Frankfurt am Main · Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507
Internet: http://www.samson.de
EB 8546 EN
S/Z 2012-08
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