R+M Suttner easyfoam365+ ST-167 User manual

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page 1, Ver. 10.2020
General
These fully stainless steel ST-167 / ST-168 injectors provide
the option of enabling two larger cross-sections in order to
guarantee virtually no pressure drop in ush mode. This makes it
possible when using large volumes of water to leave the injector
permanently on the high pressure line without adversely affecting
cleaning performance in cleaning and ush modes. A selector
enables switching between injector and ush mode, whereby two
holes duct the water parallel to the injector (bypass operation)
and injector operation, where the volume of water available is
ducted through the injection area.
With the ST-167 chemicals can be drawn in when used in
combination with a foam lance such as for example the ST-72,
ST-74 or ST-75 or a surge regulator or multi-regulator nozzle and
be sprayed or foamed using the nozzle selected.
With the ST-168 no active, i.e. separate, air intake foam lance
is necessary to generate the foam. The volume of air needed
for foaming is fed via an additional connector on the injector.
Use of a large cross-section spraygun such as for example the
ST-2720, ST-2725, ST-3100 or ST-3300 with suitable lances and
foam hoses such as the “blufood” is recommended. The ST-168
is particularly suitable for use at low or medium pressure from
5 bar upward of water intake pressure and generates excellent
foam given the appropriate compressed air supply.
The injector operates with a maximum inlet pressure of 350
bar and due to the use of high-quality materials can be used at
temperatures up to 100 °C. Throughput direction is indicated with
arrows to ensure ease of installation.
ST-167 ST-168
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...

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page 2, Ver. 10.2020
Qualied personnel
General safety notes Intended use
Info
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Connection lines used and the ST-167/168 injector unit itself must be ushed clear for 20 seconds prior to any change of
detergent. In the case of very powerful detergents please contact the manufacturer who can then assess wither operation with
this unit is possible. Any form of operation of the ST-167/168 injector unit over and above is deemed impermissible.
The bypass injector may only be installed by qualied personnel able to operate the bypass injector properly. Qualied
personnel are persons familiar with installation, commissioning and decommissioning, operation, maintenance and repair
and who hold a qualication appropriate to their work.
▪ To guarantee safe operation the bypass injector
may only be used in accordance with these
Operating Instructions.
▪ Keep these Operating Instructions in a safe place
for later reference.
▪ Please also observe the safety instructions for the
detergent and if applicable of the high pressure
cleaner manufacturer.
▪ Do not mix detergents one with the other.
▪ Wear suitable protective clothing and gloves when
working.
▪ Never direct the high-pressure jet at persons or
other living creatures.
▪ Read the safety data sheets and observe the
corresponding safety and handling regulations.
▪ The bypass injector ST-167/168 is designed for admixture
of detergents to water and for straightforward rinsing with
water.
▪ Only Pressure Equipment Directive (PED) Group 2 liquids
may be used as media. In case of doubt contact the
equipment manufacturer.
▪ The unit may only be used with a suitable pressure
generator.
▪ The unit is not designed for use with persons (children
included) with restricted sensory and mental capabilities
due to lack of experience and/or lack of knowledge unless
they are supervised by a person responsible for their
safety or if they have received instruction from that person
in use of the equipment.
▪ In general children are forbidden to use this equipment.
In addition the required safety and legal regulations for the respective type of use must be observed. This also applies to
all accessories used.
ST-167 ST-168
Injector does not suck in foaming agent or deter-
gent from the container or no foam is generated:
▪ Dosage nozzle blocked - clear nozzle with
thin wire as necessary. If strongly scaled
select new dosage nozzle.
▪ Selector lever in wrong position
▪ No dosage nozzle in foaming agent intake
hose
▪ Intake hose damaged
▪ Intake hose not immersed in foaming agent
▪ Wrong lance: ST-167 needs a foam lance
with air injector
Injector does not suck in foaming agent or detergent from the container or no foam
is generated:
▪ Dosage nozzle blocked - clear nozzle with thin wire as necessary. If strongly
scaled select new dosage nozzle.
▪ Selector lever in wrong position
▪ No dosage nozzle in foaming agent intake hose
▪ Intake hose damaged
▪ Intake hose not immersed in foaming agent
▪ Wrong spraygun: ST-168 needs a foam gun with large cross-sections.
▪ Air connection not correct or not connected in the rst place
▪ Compressed air line shut-off valve closed
▪ Recommended is connection of a pressure reducer in the compressed air line
(2 – 6 bar)
Troubleshooting

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page 3, Ver. 10.2020
Mode of operation
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
The selector lever switches between two modes of operation:
injector mode and rinse mode.
For „injector“ mode turn the selector lever to the „injector“
position. Note: always turn the lever to the end stop in order to
ensure correct operation. In the injector mode the detergent/
foaming agent intake and dosage is via the injector. Dosage
is via dosage nozzles or alternatively via the ST-161 dosage
valve. Depending on use the chemical/water mixture can be
sprayed or foamed via a suitable lance. For foaming with the
ST-167 a foam lance with an air injector (ST-72, ST-74 and
ST-75) is used or alternatively with the ST-168 air can be fed
via the additional compressed air connector provided in order
to foam the detergent.
Assembly scheme: ST-167
ST-167
Foam lance with
air injector:
ST-72, ST-74, ST-75
High pressure gun:
ST-1500, ST-2300, ST-2700
High pressure hose.
ID min. 5/16“, Length 20 m.
ID recom. 3/8“, Length 40 m.
Foam agent
High pressure device.
Pressure min. 80 bar.
Flow min. 8 l/min.
Position:
Injector operation for foam

www.rm-suttner.com
page 4, Ver. 10.2020
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Position:
Injector operation for washing operation
Assembly scheme: ST-167
Assembly scheme: ST-167
LanceNozzle High pressure gun:
ST-1500, ST-2300,
ST-2700
ST-167
Foam agent/
Cleaning agent
LanceNozzle High pressure gun:
ST-1500, ST-2300,
ST-2700
ST-167
High pressure hose.
ID min. 5/16“, Length 20 m.
ID recom. 3/8“, Length 40 m.
Cleaning agent
High pressure device.
Pressure min. 80 bar.
Flow min. 8 l/min.
High pressure device.
Pressure min. 80 bar.
Flow min. 8 l/min.
High pressure hose.
ID min. 5/16“, Length 20 m.
ID recom. 3/8“, Length 40 m.
Position:
Injector operation for cleaning agent

www.rm-suttner.com
page 5, Ver. 10.2020
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Position:
Injector operation for foam
Position:
Injector operation for
washing operation
Assembly scheme: ST-168
Assembly scheme: ST-168
Foam agent
Foam agent
High or low pressure device.
Pressure min. 5,6 bar.
Pressure max. 350 bar.
Flow 4 l/min.
High or low pressure device.
Pressure min. 5,6 bar.
Pressure max. 350 bar.
Flow 4 l/min.
Foam hose:
PUReClean365+®.
ID recom. 1/2“.
Length max. 20 m.
Foam hose:
PUReClean365+®.
ID recom. 1/2“.
Length max. 20 m.
ST-168
ST-168
Check valve
(optional)
Check valve
(optional)
Air pressure
regulator
Air pressure
regulator
Air
compressor
Shut-off valve
open
Shut-off valve
closed
Foam gun:
ST-2725, ST-3100,
ST-3300
Foam gun:
ST-2725, ST-3100,
ST-3300
Foam lance:
203 100 605, 203 100 610,
203 100 630, 502 808
Washing lance:
ST-129, ST-007 + ST-10
Air
compressor

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page 6, Ver. 10.2020
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Both the diffusor nozzle and the injector nozzle
must be screwed in as far as it will go.
By using Loxeal 56-03 the diffusor nozzle
can be sealed up.
Injector nozzle (selection)
Inlet 1/2"F
Loxeal 56-03
Counter nozzle (selection)
Selection lever
Outlet 1/2"F
Restriction
(Selection)
Dosage of the chemical
Port: Cleaning agent
(to foam)
Screw driver similar
DIN 5265 shape A
7,0 mm
1,2 mm
Tool for changing a counter nozzle:
Selection of nozzles
ST-168
Port:
Compressed
air
Injector nozzle Counter nozzle
040 003 641 (ø 1,1 mm) 040 003 514 (ø 1,4mm)
040 003 642 (ø 1,2 mm)
040 003 517 (ø 1,7 mm)040 003 643 (ø 1,3 mm)
040 003 644 (ø 1,4 mm)
040 003 645 (ø 1,5 mm)
040 003 521 (ø 2,0 mm)040 003 646 (ø 1,6 mm)
040 003 647 (ø 1,7 mm)
040 003 648 (ø 1,8 mm)
040 003 523 (ø 2,3 mm)040 003 649 (ø 1,9 mm)
040 003 650 (ø 2,0 mm)
040 003 651 (ø 2,1 mm)
040 003 528 (ø 2,8 mm)
040 003 652 (ø 2,2 mm)
040 003 653 (ø 2,3 mm)
040 003 654 (ø 2,4 mm)
040 003 655 (ø 2,5 mm)
040 003 656 (ø 2,6 mm)
04 0003 532 (ø 3,2 mm)040 003 657 (ø 2,7 mm)
040 003 658 (ø 2,8 mm)

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page 7, Ver. 10.2020
Description
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Table reading example for scale setting
Flow volume: 15 l/min
Detergent or disinfectant concentration: 3 %
Calculated in accordance with the following formula:
(3 % * 15 l/min) / 100 % = 0,45 l/min (dosage rate) => graph setting 2 (read from diagram)
Concentration (%) * Flow Volume min
100
1
= Dosage min
1
((( ) )
)
The flow volume can be read from a
corresponding nozzle table
0,00
1234567 10 234567
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
(10 l/min)
1,3 - 1,7 1,6 - 2,0 1,8 - 2,3 2,4 - 2,8 2,8 - 3,2
(15 l/min) (20 l/min) (30 l/min) (40 l/min)
Medium: Water (p = approx. 998 kg/m3)Note.: The graph only represents guide values
Scale setting
Dosage in l/min
Injector ST-161 with dosage nozzles "intake flow volume"

www.rm-suttner.com
page 8, Ver. 10.2020
Description
User manual easyfoam365+ ST-167 / ST-168 bypass-injectors
Product code.: 200 167 ... / 200 168 ...
Table reading example for dosage nozzle bore
Flow volume: 15 l/min
Detergent or disinfectant concentration: 5 %
Calculated in accordance with the following formula:
(5 % * 15 l/min) / 100 % = 0,75 l/min (dosage rate) => nozzle selection 1,2 (read from diagram)
0,00
0,5 0,6 0,7 1,0 1,1 1,2 1,3 1,5
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
(10 l/min)
1,3 - 1,7 1,6 - 2,0 1,8 - 2,3 2,4 - 2,8 2,8 - 3,2
(15 l/min) (20 l/min) (30 l/min) (40 l/min)
without
nozzle
Medium: Water (p = approx. 998 kg/m3)Note.: The graph only represents guide values
Dosage nozzle bore
Injector ST-160 with dosage nozzles "intake flow volume"
Dosage in l/min
Concentration(%) * Flow volume min
100
1
= Dosage min
1
((( ) )
)
The flow volume can be read from a
corresponding nozzle table