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

(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) 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

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

) and screw it into the

unoccupied pressure gauge connection

at the front to seal it.

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