AKO 226.0120 Series User guide

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
Updated 08.03.2017,
Data subject to change without notice
AKO Three-Way Temperature Regulator with interior Thermostat
Balanced, with flange connections
Type Series 226.0120 - 226.0149, 226G0120 – 226G0149,
226.0220 – 226.0239, 226.0320 – 226.0329,
226.0420 - 226.0439, 227.0420 – 227.0439
227.0520 – 227.0529

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
2
Contents
1. General information and Safety instructions………………………………………. 3
2. Notes on possible dangers…………………………………………………………... 3
2.1 Significance of symbols…………………………………………………… 3
2.2 Explanatory notes on safety information…………………………………… 3
3. Scope of applications………………………………………………………………… 4
4. Operation principles………………………………………………………………….. 5
5. Technical data………………………………………………………………………… 5
5.1 Regulating Valve……………………………………………………………. 5
5.2 Wax-Thermostat …………………………………………………………….. 5
5.3 Dimensions………………………………………………………………….. 6
5.4 Marking..…………………………………………………………………….. 6
6. Transport and storage …………………………………………………………………. 6
7. Installation…………………………………………………………………………….. 7
7.1 General notes on installation………………………………………………..... 7
7.2 Installation of the Valve……………………………………………….……... 8
8. Emergency manual adjustment………………………………………………………...8
9. Operation of the emergency manual adjustment ………………………………………8
10. Service and maintenance………………………………………………………………9
11. Fault detective and corrective………………………………………………………… 9
12. Exchanging a thermostat ………………………………………………………………9
12.1 Dismantling of the thermostat………………………………………………. .9
12.2 Installation of the thermostat ………………………………………………..10
12.3 Control of the manual adjustment …………………………………………...10
13. REACh-Declaration …………………………………………………………………….10

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
3
1. General Information and Safety Instructions
Regulations, guidelines, standards etc. listed in these mounting and servicing instructions
correspond to the level of information available at the time of preparation and are not
subject to an updating service. They must be applied by the user on his own responsibility
in their respective latest valid version.
They are generally binding on transport, storage, installation, start-up, operation,
maintenance and repair.
In case of any difficulties, which cannot be solved by means of these mounting and
servicing instructions, please contact either the supplier or manufacturer.
Handling and all work must be carried out by expert personnel or all activities must
be supervised and checked. It is the owner’s responsibility to define areas of
responsibility and competence and to monitor the personnel.
In addition, current regional safety requirements must be applied and observed when
taking the fittings out of service as well as when maintaining and repairing them.
For appropriate operation, make sure that the temperature regulator is only used in
applications where the operating pressure and temperatures do not exceed the
operating values based on the valve sizing data submitted in the order.
Note that the manufacturer does not assume any responsibility for damage caused
by external forces or any other external influences.
The manufacturer reserves the right to introduce technical modifications and
improvements at any time.
The controllers meet the requirements of the EC Machinery Directives 2006/42EG. For
regulators that are marked with a CE mark, declaration of conformity is the information about
the applied conformity assessment procedures. The declaration is available on request
These mounting and servicing instructions comply with the requirements of EU Directives.
Note!
The non-electric actuators and valves do not have their own potential ignition
source according to the ignition risk assessment stipulated in EN 13463-1:2001,
Section 5.2, even in the rare incident of an operating fault. Therefore, they do
not fall within the scope of Directive 94/9/EC.
For connection to the equipotential bonding system, observe the requirements
specified in EN 60079-14:1977 (VDE 0156 Part 1), section 6.3.
2 . Notes on possible dangers
2.1 Significance of symbols
Warning of general danger
Note ! General mounting, start-up and maintenance information
2.2 Explanatory notes on safety information
In these mounting and servicing instructions dangers, risks and items of safety
information are highlighted to attract special attention.
Information marked with the above symbol and “ATTENTION” describe practices, a failure
to comply with which can result in serious injury or danger of death for users or third parties
or in material damage to the system or the environment. It is vital to comply with these
practices and to monitor compliance.

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
4
3. Scope of Application
The use of AKO Temperature Regulators is applicable to all branches of industry in which it
is necessary to control systems, i.e. cooling systems and can be used as divider or mixing
valves. They are characterised by the fact that they are relatively maintenance free, are very
service friendly and that they are not sensitive to pressure. The inner parts can be exchanged
immediately without having to disassemble the regulating valve from the pipe. The AKO
Thermostats require no auxiliary energy whatsoever.
-Refer to the data sheet for applications, limits on use and possibilities.
-Certain media require or preclude the use of special materials.
-The valves are designed for standard operating conditions. If conditions exceed
these requirements, e.g. aggressive or abrasive media, the operator should
state the higher requirements when ordering
-Valves made from grey cast iron are not authorized for the use in systems subject to
TRD 110.
The Temperature Regulators can be used selectively as flow divider or mixing valve.
-Mounting of the temperature regulator
for the regulation of the medium-inlet
temperatures as flow divider, e.g.
A from the motor
B to the motor (by-pass)
C to the cooler
-Mounting of the temperature regulator
for the regulation of the medium-outlet
temperatures as mixing valve, e.g.
A to the motor
B from the motor (by-pass)
C from the cooler
The path descriptions A, B and C have been cast on the housing

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
5
4. Operating principles
AKO Thermostats are equipped with interior, easily exchangeable thermostats which
register the temperature of the medium surrounding them at the measuring point (point of
installation) and convert it into another physical dimension, namely extension and therefore
into a change in distance or length (the valve stroke). With increasing temperature and
exceeding the opening start temperature, the tubular slider is lifted off the seat of the valve
and opens the path from A to C, at the same time and in the same ratio the path from A to B
is closed. The change in path occurs proportionally to the change in temperature of the
medium flowing through. The descriptions A, B and C have been cast on the housing of the
thermostat. The thermostats can be installed in every position.
5. Technical Data
5.1 Regulating Valve
Materials
- housing EN-GJL-250, EN-GJS-400-15, CuSn10-C,
GP240GH, GX5CrNi19-10 (1.4308)
- inner parts stainless steel, brass
Sealing kit NBR
Operation temperature max. 120 °C
Operation pressure max. 16, 25, 40 bar
Admissible differential pressure max. 40 bar
Nominal pressure PN 16, 25, 40
Connection Flange EN 1092-1
5.2 Wax-Thermostat 237.0120-xxx-0
Materials brass, bronze, stainless steel
(nickeled, gilded)
Operation temperature max. 120 °C
Deliverable temperature ranges
- Standard execution
- Sea water execution
Deliverable temperature ranges 237.0120-xxx-0
05 – 15 °C 37 – 47 °C 62 – 71 °C 82 – 93 °C
14 – 26 °C 39 – 50 °C 66 – 74 °C 85 – 96 °C
20 – 30 °C 43 – 54 °C 68 – 78 °C 88 – 99 °C
27 – 37 °C 51 – 60 °C 71 – 79 °C 93 – 103 °C
29 – 40 °C 54 – 63 °C 74 – 82 °C 102 – 113 °C
32 – 41 °C 57 – 66 °C 77 – 85 °C
35 – 43 °C 60 – 69 °C 79 – 88 °C
Deliverable temperature ranges 237.0520-xxx-0
10 – 18 °C 32 – 41 °C 41 – 50 °C
20 – 30 °C 35 – 43 °C
27 – 41 °C 38 – 47 °C

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
6
5.3 Dimensions
order
-
n
r.
DN
D
[mm]
g
[mm]
b
[mm]
h
[mm]
T
[mm]
EL
[mm]
K
[mm]
L
[mm]
pieces of
thermostats
weight
[kg]
226.0120-040
226.0121-040
40 150 88 18 102 142
172 178 110 4x18 1 13,0 13,0
226.0120-050
226.0121-050
50 165 102 20 150 135
165 225 125 4x18 1 17,0 17,0
226.0120-065
226.0121-065
65 185 122 20 165 116
146 254 145 4x18 2 25,0 26,0
226.0120-080
226.0121-080
80 200 138 22 171 108
138 267 160 8x18 2 29,0 30,0
226.0120-100
226.0121-100
100 254 158 32 217 125
155 403 180 8x18 4 43,0 45,0
226.0120-125
226.0121-125
125 250 188 26 241 182
212 489 210 8x18 6 65,0 67,0
226.0120-150
226.0121-150
150 285 212 26 254 182
212 489 240 8x22 8 79,0 83,0
5.4 Marking
6. Transport and storage
Proper shipping and appropriate storage of the control valves are provided.
Note the transport and storage temperature of -25 to 80 ° C.

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
7
7. Installation
7.1 General notes on installation
If the manufacturer of the aggregate or plant has issued specific installation
instructions, make sure they are observed.
The following items should be taken into account besides the general principles
governing installation work:
- before installing please make sure that the plant will be pressure less
and empty of any medium
- in case of high temperatures, please wait for the cooling down to
ambiance temperature
- purge piping system in case of caustic, inflammable, aggressive or
toxic media
- Planners/construction companies or operator are responsible for positioning
and installing products.
-For application outside or in adverse environments like corrosion-promoting conditions
(sea-water, chemical vapours), special constructions or protective measures
are recommended.
-Before installing the regulating valve, rinse and clean the system otherwise the
cone/seat area will be damaged and the control hole will be blocked.
-The direction of flow must correspond with the arrow on the valve body.
-Insert thermometer to control the medium temperature.
-Install a strainer upstream of the temperature regulator to prevent that any sealing parts,
welding spatter and other impurities carried along by the process medium impair the proper
functioning of the valve, above all the tight shut-off.
The filter element must be suspended downwards.
Note!
Remember to leave enough space to remove the filter element
- The place of installation should be easily accessible and provide ample space for
maintenance and extracting the thermostat out of the piping.
- Install a shut-off valve upstream and downstream of the temperature regulator to enable
repair and maintenance work without emptying the system.
Note!
Do not install the temperature regulator between a pressure reducing valve
and its control line connection
Refer to the data sheet for applications, limits, limits on use and possibilities.

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
8
7.2 Installation of the Valve
Install the valve with the operating element connection suspended downwards. The
connecting position of the flanges has to follow the function of the control valve. Below the
opening temperature the way A-B is opened. Connection B is always connected to the bypass.
Connection C is always connected to the heat exchanger.
Example of installation of a temperature valve at a heat exchanger
1temperature regulator
2strainer
3shut-off valve
8. Emergency manual adjustment
The thermostats described here are partly equipped with an emergency manual
adjustment in order to comply with the safety requirements - especially those of the
classification companies. This emergency manual adjustment is not to be used for
adjustment during automatic operation. If the thermostat fails, the control valve can be used
as a manually operated three-way valve via the emergency manual adjustment and therefore can
be set in any position until the thermostat can be repaired or replaced.
9. Operation of the emergency manual adjustment
On delivery, the adjusting screw of the manual adjustment is secured in the starting
position with a counter nut. If the thermostat fails, this counter screw is released and the
adjusting screw is adjusted in a clockwise direction using the offset screw driver DIN 911
which is included in delivery. In doing so the tubular slider above the pressure plate is opened
to the cooling path (C), and at the same time the short circuit path (B) is throttled. Between both
end positions any position of the tubular slider is possible so that whilst monitoring the
thermometer the operating temperature can be reached. You must make sure that after every
adjustment the counter nut is fastened tightly again. When installing a new thermostat the
adjusting screw must be put back into its original position so that the path to the cooler (C) is
not mechanically opened first, as this gap cannot be closed again by the automatic system.

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
9
10. Service and Maintenance
AKO temperature valves are virtually maintenance free. However, if the medium
contains pollutants or deposits occur in the control valve, it may be necessary to clean the
control valve at large intervals.
Please check from time to time in order to recognize any possible malfunction.
11. Fault detective and corrective
In case of mal function it has to be checked, if installation and setting have been
executed according to this operations manual.
Reasons for control temperature exceeds being too high
-thermostats soiled, limed up or sticking
(clean valve and replace sealing kit)
-radiator capacity too low
(clean radiator and check cooling capacity)
-temperature range of thermostats too high
(fit thermostats with appropriate set point)
-heat source supplies too much heat, control valve underdimensioned
(recalculate dimensioning of control valve)
-pressure loss of cooler too high
(reduce pressure difference between port B and C)
Reasons for control temperature being too low
-the temperature range of the thermostats is too low
(fit thermostats with appropriate set point)
-heat source supplies to few heat, control valve overdimensioned
(recalculate dimensioning of control valve)
-control valve installed incorrectly. Ports B and C inverted. At low temperatures the
complete flow of coolant runs through the cooler.
(correct installation of the valve)
-thermostats have been overheated, sliders of the thermostats do not close properly
(replace thermostat)
12. Exchanging a thermostat
When repairing the following points must be overserved:
-pressureless pipe system
-medium must be cool
-plant must be drained
-purge piping systems in case of caustic, inflammable, aggressive or toxic media
12.1 Removing of the thermostat
- lock all pipes leading to the control valve, release remaining pressure
- open valve cover bolts M8 (pos.5) and remove valve cover (pos.2)
- extract thermostat (pos.4)
- check inside of valve body for soils and clean if necessary.
- check condition and proper seating of the thermostat slider.
- check and replace flat seal (pos.7) in the guiding ring (pos.3) and the o-ring (pos.6)

Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
AKO Regelungstechnik GmbH & Co KG
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
eMail: [e-mail] • Web: http://www.ako-regelungstechnik.de
10
12.2 Installation of thermostat
Assembly is executed in vice versa order. In case of control valves with manual
override, it has tube ensured that the tips oft he thermostat fit in the groove of the pressure plate
oft he valve cover. If they do not fit, the plates have to be bent carefully in order to make the
tips fit in the groove.
Fit the valve cover with new o-ring when necessary and tighten the bolts with torque wrench ca.
30 Nm.
If a thermostat with different temperature range has been fitted, replace the type label by a new
one showing the correct
12.3 Testing the function of the manual override
- open lock nut (pos. 10)
- turn the adjustment bolt (pos.9 clockwise for 10 mm by means of the wrench
(pos.8). In case the thermostat blocks or sticks, open the bolts (pos.5) and move the
valve cover until the drag disappears.
-bring the adjustment bolt in its original position and fix the lock nut.
13. REACh-Declaration
Declaration to regulation EC 1907/2006 concerning the Registration, Evaluation,
Authorisation and Restriction of Chemicals (REACh)
By the REACh-Regulation, the company AKO Regelungstechnik GmbH & Co. KG is only
affected as a downstream user. Responsibilities due to the production and Marketing of
substances / chemicals for pre-registration or registration are not applicable for us.
As a downstream user we will fulfil all requirements according to REACh.