SPX FLOW APV CU4 Series User manual

APV CU4** AS-interface Control Unit
SAFETY AGAINST EXPLOSION - FOR IECEx ZONE 2 GAS APPLICATIONS
FORM NO.: H345317 REVISION: GB-1 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT.
INSTRUCTION MANUAL

CE Declaration of Conformity
UKCA Declaration of Conformity
We,
DESIGN CENTER/MANUFACTURER: SPX Flow Technology Germany GmbH
Gottlieb-Daimler-Str. 13, D-59439 Holzwickede
MANUFACTURING FACILITY: SPX Flow Technology Poland sp. z o.o.
Rolbieskiego 2, 85-862 Bydgoszcz, Poland
AUTHORIZED REPRESENTATIVE: SPX Flow Europe Ltd.
(for UKCA) Part Ground floor, Alexander House
4 Station Road Cheadle Hulme
UK SK8 5AE United Kingdom
declare under our sole responsibility that the
CU4 Direct Connect, AS-interface Control Units for IECEx ATEX Zone 2
CU4plus Direct Connect, AS-interface, IO-Link Control Units for IECEx ATEX Zone 2
Explosion subcategory / Equipment marking:
II 3 G Ex ec IIB T4 Gc
IECEx TUN 22.0020X
TÜV 23 ATEX 349764 X
0°C ≤ Tamb. ≤ +55°C
meet the requirements of the
IECEx ATEX Standards
IEC 60079-0:2017, Edition 7.0 and IEC 60079-7:2017, Edition 5.1 as well as
EN IEC 60079-0:2018 and EN IEC 60079-7:2015/ A1:2018
TÜV NORD CERT GmbH, Hanover-Office, Am TÜV 1, 30519 Hanover, Germany,
Notified Body number: 0032
Electromagnetic Compatibility Directive 2014/30/EU
& protection class IP 64 EN 60529, EN 61000-6-2, EN 61000-6-4, EN 60068-2-6
RoHS Directive 2011/65/EU
--------------------------------------------------------------------------
Holzwickede, Nov. 2023 Dr.-Ing. Behdad Ariatabar, Design Center Lead - Valves
meet the requirements of the
Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres
Regulations 2016 No. 1107 & BS harmonized standards
Electromagnetic Compatibility Regulations 2016 No. 1091 & BS harmonized standards
Restriction of Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulation 2012 No. 3032
--------------------------------------------------------------------------
Manchaster, Nov. 2023 Mark Shanahan, VP Finance N&H Solutions
DocuSign Envelope ID: 3772203F-DF63-45FE-A28F-5CDF8FFEE948

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
3
SPX FLOW
Content Page
0. IECExSpecicInstructions 4
0.1. General Information
0.2. IECEx Specic Symbol
0.3. Authorized Use
0.4. Specic Safety Instructions
0.5. Identication of CU4** resp. CU4*plus* Control Units
for use in IECEx ATEX environment
0.6. Responsibilities
1. AbbreviationsandDenitions 8
2. SafetyInstructions 8
2.1. Sentinels
2.2. Intended Use
2.3. General Regulations for Careful Handling
2.4. Welding instructions
2.5. Persons
2.6. Warranty
2.7 Important Safety Instructions for AS-interface networks
3. GeneralTerms 11
3.1. Purpose of use
3.2. Design of CU4 AS-interface
3.3. Function of the individual components
4. MechanicsandPneumatics 14
4.2. Pressure relief valve
4.1. Air connections for double seat mix proof valves
4.3. Functional description - block diagrams
4.4. Technical Data / Standards
4.5. Solenoid valves
4.6. Throttling function
5. Adapter 19
6. Electronicmodule 20
6.1. Function / Block diagram
6.2. Functional description of connections
6.3. Use of data bits
6.4. Technical Data
6.5. Connections
6.6. LED indication
7. Feedbackunit 26
7.1. General terms
7.2. Sensors
7.3. Adjustment of valve position feedback
8. CUAssemblyandStartup 27
8.1. Double seat mix proof valves D4, D4 SL
9. AccessoriesandTools 30
10. Service 31
10.1. Dismantling
11. TroubleShooting 32
12. IECEx/CCCCerticateofConformity 34
13. SparePartsLists 34

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
4
SPX FLOW
0. IECExSpecicInstructions
0.1. GeneralInformation
These IECEx Specic Safety Instructions apply for CU4**
resp.CU4*plus*ControlUnits used in Potentially Explosive
Atmospheres Zone2,Gasapplications. The equipment was
assessed according to IEC 60079-0:2017, Edition 7.0 and IEC
60079-7:2017, Edition 5.1.
Notied body: TÜV NORD CERT GmbH, Hanover-O󰀩ce
Am TÜV 1, 30519 Hanover, Germany
Notied Body number: 0044
These instructions shall be read carefully by the competent
operating and maintenance personnel.
We point out that we will not accept any liability for damage or
malfunctions resulting from the non-compliance with these
instructions.
0.2. IECExSpecificSymbol
DANGER!WARNING!CAUTION!
This symbol draws your attention to important directions which have
to be observed for the operation in explosive areas.
Failure to observe the warning may result in fatal or serious injury
as well as damage to property!
0.3. AuthorizedUse
The Control unit type CU4** resp. CU4*plus* is designed to be
mounted to pneumatic actuators of process valves for the control
of media as used in the food and beverage industries as well as in
pharmaceutical and chemical applications.
The control unit is installed on a pneumatic actuator of a process
valve. The process valve and the actuator must have at least the
IECEx ATEX approval of the control unit.
SPX FLOW will be held responsible only for the control units
supplied and selected according to the operating conditions
indicated by the customer or end user and as stated in the order
conrmation. If in doubt, contact your local supplier.
Observe the admissible data, operating conditions and conditions of
use as specied in the contract documents, instruction manuals and
on the type label.
The control unit must only be used with SPX FLOW valves and
components recommended and authorized by SPX FLOW.
Adequate transport, storage and installation, careful handling and
maintenance are essential for a faultless and reliable function of the
control unit.
Observe the intended use of the control unit.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
5
SPX FLOW
lead seal
detailX:electrostatic risk label
CU4 D4 IECEx Z2
detail X
detailY: type label
control unit
detail Y
earthing
screw
connection
0. IECExSpecicInstructions
0.4. SpecificSafetyInstructions
Connecting/Disconnectingpluggableelectriccircuits
- The connecting and disconnecting of the pluggable electrical circuits
including eld wirings is only permitted in the absence of explosive
atmosphere.
Openingthedevice
- Do not open the control unit in the presence of explosive
atmosphere.
- Do not install and set the proximity switches in the presence of
explosive atmosphere.
- Before startup, secure the cover with the enclosed lead seal.
Opening the cover without tools must be prevented.
Electrostaticdischarge
- The control unit has to be installed and used in such a way, that
electrostatic charging from operation, maintenance and cleaning is
excluded.
- Connect the earthing screw in order to integrate the control unit in
the local potential equalization system.
- In case of sudden discharge from electrostatically charged devices
or individuals, risk of explosion in the explosive area exists.
- Prevent the occurance of electrostatic discharges by suitable
measures.
- Clean the control unit surface by gently wiping it with a damp or
antistatic cloth, only.
Inordertopreventtheemergenceofexplosionrisksobserve
thesafetyinstructionsoftheinstructionmanualandadhereto
thefollowing:
- Observe information on temperature classes, ambient temperatures,
degree of protection and voltage on the approval ID label.
- Do not use control units in areas subject to gas with lower ignition
temperatures than indicated on the approval ID label.
- Installation, operation and maintenance may only be performed by
qualied personnel.
- Observe the applicable international and national safety regulations
as well as the general rules of technology for construction and
operation.
- Do not repair the control unit yourself. Replace it by an equivalent
device.
- Repairs may only be performed by the manufacturer.
- Do not expose the control unit to mechanical and/or thermal loads
which may exceed the limits described in the instruction manual.
- Only use cable and/or line entry points approved for the respective
application area and which are screwed in place according to the
respective installation instructions.
- The cable glands may be used for xed installations, only.
- Close all unnecessary cable glands with locking screws approved
for the explosive area.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
6
SPX FLOW
0. IECExSpecicInstructions
0.4. SpecificSafetyInstructions
Inordertopreventtheemergenceofexplosionrisksobserve
thesafetyinstructionsoftheinstructionmanualandadhereto
thefollowing:
- The required degree of protection (IP64) is guaranteed only in
connection with suitable adaption sets. All pneumatic and electrical
connections must be equipped with suitable connectors.
- Install the control unit in such a way that it is protected from UV-
radiation.
- The control unit has to be installed in such a way that a pollution
degree 2 or better, according to IEC 60664-1, is achieved.
- Externally to the control unit, measures have to be taken to
provide a transient protection which ensures that the rated voltage,
connected to the power supply terminals, is not exceeded by more
than 40 %.
- Ambient temperature range: 0 °C ≤ Tamb ≤ +55 °C
--安全使用条件：安全使用条件：
--使用环境温度:0°C~+55°C使用环境温度:0°C~+55°C
--控制单元CU4**和CU4*plus*在安装和使用时,避免在操作,控制单元CU4**和CU4*plus*在安装和使用时,避免在操作,
--维护和清洁时产生静电维护和清洁时产生静电
--控制单元CU4**和CU4*plus*在安装时必须防止紫外线照射控制单元CU4**和CU4*plus*在安装时必须防止紫外线照射
--在爆炸性危险场所严禁连接和断开电路在爆炸性危险场所严禁连接和断开电路
--根据GB/T16935.1,该设备只应在污染程度不低于2级的区域使用根据GB/T16935.1,该设备只应在污染程度不低于2级的区域使用
--控制单元CU4**和CU4*plus*的瞬态保护应提供不超过设备的供控制单元CU4**和CU4*plus*的瞬态保护应提供不超过设备的供
电端子额定峰值电压值140%的保护电端子额定峰值电压值140%的保护

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
7
SPX FLOW
0. IECExSpecicInstructions
0.5. IdentificationofCU4**resp.CU4*plus*ControlUnits
 foruseinIECExATEXenvironment
IECEx / ATEX - identication:
Equipment group II
Explosion subcategory
Ex ec IIB T4 Gc
Ambient temperature
0 °C ≤ Tamb ≤ +55 °C
0.6. Responsibilities
It is within the operator`s responsibility to ensure that the specied
product temperatures are not exceeded and that regular inspections
and maintenance are carried out to provide for proper function of
the control unit and valve.
Thefollowingpagesshowtheoperatinginstructionsforthe
standardcontrolunitfornon-IECExATEXapplications.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
8
SPX FLOW
1. AbbreviationsandDenitions
A ExhaustAir
AWG AmericanWireGauge
CE CommunautéEuropéenne
CU ControlUnit
DI DigitalInput
DO DigitalOutput
EMC ElectromagneticCompatibility
EU EuropeanUnion
GND Ground
IP InternationalProtection
LED LuminousDiode
N PneumaticAirConnectionNOTelement
NEMA NationalElectricalManufacturersAssociation
P SupplyAirConnection
PWM Pulse-WidthModulation
Y PneumaticAirConnection
2. SafetyInstructions
2.1. Sentinels
Meaning:
Danger! Direct danager which can lead to severe boldily
harm or to death!
Caution! Dangerous situation which can lead to bodily
harm and/or material damage.
Attention! Risk as a result of electric current.
Note! Important technical information or recommendation.
Thesespecialsafetyinstructionspointdirectlytothe
respectivehandlinginstructions.Theyareaccentuatedbythe
correspondingsymbol.Carefullyreadtheinstructionstowhich
thesentinelsrefer.Continuehandlingthecontrolunit
onlyafterhavingreadtheseinstructions.
DANGER
DANGER
!

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
9
SPX FLOW
2. SafetyInstructions
2.2. IntendedUse
The CU4 control unit is only intended for use as
described in chapter 3.1. Use beyond that described in
chapter 3.1. is not according to the regulations and SPX FLOW
shall not be held responsible for any damage resulting from this
non-observance.
The operator bears the full risk. Conditions for the proper and
safe operation of the control unit are the appropriate transport
and storing as well as the professional assembly. Intended
use also means the observance of all operating, service and
maintenance conditions.
2.3. GeneralRegulationsforCarefulHandling
To ensure a faultless function of the unit and a long service life,
the information given in this instruction manual as well as the
operating conditions and permissible data specied in the data
sheets of the control unit for process valves must be strictly
adhered to.
- The operator is committed to operating the control unit in faultless
condition, only.
- Observe the general technical rules while using and operating the
unit.
- Observe the relevant accident prevention regulations, the national
rules of the user country as well as your company-internal operating
and safety regulations during operation and maintenance of the unit.
- Switch o󰀨 the electric power supply before carrying out any work on
the system!
- Note that piping or valves that are under pressure must not be
removed from a system!
- Take suitable measures to prevent unintentional operation or
impermissible impairment.
- Following an interruption of the electrical or pneumatic supply,
ensure a dened and controlled re-start of the process!
- If these instructions are not observed, we will not accept any liability.
Warranties on units, devices and accessories will expire.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
10
SPX FLOW
2. SafetyInstructions
2.4. Weldinginstructions
It is generally recommended to avoid welding work in process
installations in which control units are installed and connected.
If welding is nonetheless required, earthing of the electrical
devices in the welding area is a necessity.
2.5. Persons
- Installation and maintenance work may only be carried out by
qualied personnel and by means of appropriate tools.
- The qualied personnel must get a special training with regard to
possible risks and must know and observe the safety instructions
indicated in the instruction manual.
- Work at the electrical installation may only be carried out by
personnel specialised in electrics!
2.6. Warranty
This document does not contain any warranty acceptance.
We refer to our general terms of sale and delivery.
Prerequisite for a guarantee is the correct use of the unit in
compliance with the specied conditions of application
Attention! This warranty only applies to the control unit.
No liability will be accepted for consequential
damage of any kind that could arise from the failure
or malfunction of the device
2.7 ImportantSafetyInstructionsforAS-interfacenetworks
- Always use protective modules against excess voltage in the AS-
interface installation.
- Grounding
For the AS-interface network a potential-free operation must be
guaranteed. Use isolation monitoring modules to provide for proper
grounding conditions.
Grounding of the bus cable or connected components or their
charging with external voltage leads to malfunction in the bus
system.
!
!

5.
1.
6.
4.
3.
2.
SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
11
SPX FLOW
3. GeneralTerms
3.1. Purposeofuse
The CU4 AS-interface Control Unit was developed for the control of
process valves used in the food and related industries.
The CU4 control unit operates as interface between process control
and process valve and controls the electric and pneumatic signals.
The pneumatic control of valves is undertaken via the solenoid
valves. The control unit controls the valve positions, open and
closed, via integrated and external sensors. The electronic module
undertakes the task to process the switching signal from the control
and to control the corresponding solenoid valves. The electronic
module also provides potential-free contacts.
The corresponding light signals in the control unit provide for an
external indiciation of the valve positions.
3.2. DesignofCU4AS-interface(fig.3.2.)
The CU4 AS-interface control unit mainly consists of the following
components:
1. The control unit base with integrated air channels and electric and
pneumatic connections as well as window with type label.
2. 1 or 3 solenoid valves for the control of the valve actuators and for
the seat lifting of double seat valves.
3. Sensor module with 2 integrated Hall sensors or 2 external
proximity switches to detect the valve position.
4. The electronic module for the electric supply, communication with
control, evaluation of feedback signals and control of solenoid
valves as well as valve position indication through LED.
5. Clamp ring to fasten the CU4 on the adapter.
6. Cover with optical window.
The cable/s by means of which the solenoid valves are connected
with the electronic module must be guided through the cable guide
at the rear side of the electronic module (g. 3.2.1).
cable guide
fig. 3.2.
fig. 3.2.1
3.
2.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
12
SPX FLOW
3. GeneralTerms
3.3. Functionoftheindividualcomponents
The installation of the control unit is undertaken by special adapters
which are available for the di󰀨erent valves types, see chapter
5. Adapter. The snap connectors for supply air and pneumatic air
to the individual cylinders at the valves are located at the outside of
the control unit. In case of the control units for valves with turning
actuator, the pneumatic air is transferred internally to the actuator.
The air supply of the control unit is equipped with an exchangeable
air lter. Observe the required compressed air quality! Please also
see chapter 4.5.
The number of the solenoid valves installed in the CU4 depends on
the valve actuators to be controlled. Double seat valves without seat
lift function require 1 solenoid valve. Control units for double seat
valves are equipped with 3 solenoid valves.
The electronic module installed in the control unit fullls the task to
process the electric signals from the control, to activate the solenoid
valves and to evaluate the feedback signals from the feedback unit.
Moreover, the signalling and indication of the valve positions as well
as additional diagnostic functions are undertaken via the electronic
module.
The electronic module is the interface between actuators, sensors
and the superior control system.
A feedback unit is required to detect the valve position. The CU4
AS-interface is equipped with 2 adjustable Hall e󰀨ect sensors.
These are activated by a valve control rod installed at the operating
cam. In this way, the open and closed valve position can be
detected.
The 2 Hall e󰀨ect sensors are continuously adjustable over an
additional range. Thus, feedback messages for di󰀨erent valves with
di󰀨erent stroke lengths can be adjusted properly. As an alternative,
external proximity switches can be connected instead of the
integrated Hall e󰀨ect sensors when the valve position indication is
undertaken direct at the process valve.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
13
SPX FLOW
3. GeneralTerms
3.3. Functionoftheindividualcomponents
The luminous diodes are located on the front side of the electronic
module. Their signals are visibly indicated to the outside by an
optical window in the cover of the control unit. Beside the open and
closed valve position, the existence of the operating voltage as well
as di󰀨erent diagnostic information are indicated. Chapter 6.6. LED
indication provides more details.
The complete control unit is designed according to the building
block principle. By exchange of the electronic module, the control
type can be changed, e.g. from direct control (Direct Connect) to
communication with AS-interface.
Note! Wiring must be changed.

A1 A2
Y1 Y2(N) Y3
P
AIRIN
SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
14
SPX FLOW
4. MechanicsandPneumatics
4.1.1. Function
CU41-D4
designfordoubleseatmixproofvalves
withoutseatlift
P ir supply with integrated particle lter
Y1control air connection for main actuator
A1 exhaust air with silencer
CU43-D4
designfordoubleseatmixproofvalveswithseatlift
P air supply with integrated particle lter
Y1 pneumatic air connection for main actuator
Y2 pneumatic air connection for seat lift actuator of upper seat lift
Y3 pneumatic air connection for seat lift actuator of lower seat lift
A1/A2 exhaust air with silencer
4.2. Pressurereliefvalve
The base of the control unit is equipped with a pressure relief valve
which prevents an inadmissible pressure build-up in the inner
control unit.
If required, the pressure relief vents into the clearance between the
base and the adapter of the control unit.
The pressure relief valve must not be mechanically blocked
under any circumstances!
DANGER
DANGER
4.1. Airconnectionsfordoubleseatmixproofvalves

The picture shows a standard NC
(spring to closed) valve.
1
Sensor 2
“Valve open”
Sensor 3
“Valve closed”
2
3
4
5
A / Exhaust air
P / Air supply
Solenoid valve
Throttle valves
6
10
11
12
7
8
4. MechanicsandPneumatics
4.3. Functionaldescription-blockdiagrams
4.3.1. CU41-D4AS-interfaceforD4doubleseatmixproofvalve
withoutseatliftfunction
M1 - magnet upper shaft
M2 - magnet lower shaft
M1
M2
5 VDC
Sensor 1
GND
5 VDC
Sensor 2
GND
Normal
Reverse
Feedback
AS-i-Bus +
AS-i-Bus -
SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
15
SPX FLOW

The picture shows a standard NC
(spring to closed) valve.
Exhaust air
Exhaust air
IN
air
Sensor 2
“Valve open”
Sensor 3
“Valve closed”
1
2
3
4
5
6
10
11
12
sol. 1
sol. 2
sol. 3
7
8
4. MechanicsandPneumatics
4.3. Functionaldescription-blockdiagrams
4.3.2 CU43-D4AS-interfaceforD4SLdoubleseatmixproofvalves
withseatliftfunction
M1
M2
M1 - magnet upper shaft
M2 - magnet lower shaft
5 VDC
Sensor 1
GND
5 VDC
Sensor 2
GND
Normal
Reverse
Feedback
AS-i-Bus +
AS-i-Bus -
seat lift cylinder lower valve seat
main cylinder and integrated seat lift cylinder upper valve seat
SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
16
SPX FLOW

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
17
SPX FLOW
4. MechanicsandPneumatics
4.4. TechnicalData/Standards
Material: PA6.6
Ambienttemperature: 0°C to +55°C (limitation due to
ATEX application)
EU: EMC 2014/30/EU (89/336/EEC)
Standardsand
environmentalaudits: Protection class IP 67 EN60529/
EMC interference resistance
EN61000-6-2
EMC emitted interference
EN61000-6-4
Vibration/oscillation EN60068-2-6
Safety of machinery
DIN EN ISO 13849-1
Airconnection: 6 mm / ¼" OD
Pressurerange: 6–8 bar
Compressedairquality: Quality class acc. to
DIN ISO 8573-1
- Contentofsolidparticles: Quality class 3,
max. size of solid particles per m³
10000 of 0,5 μm < d < 1,0 μm
500 of 1,0 μm < d < 5,0 μm
- Contentofwater: quality class 3,
max. dew point temperature -20 °C
For installations at lower
temperatures or at hight altitude,
additional measures must be
considered to adopt the pressure
dew point accordingly.
- Contentofoil: quality class 1,
max. 0,01 mg/m³
TheoilappliedmustbecompatiblewithPolyurethane
elastomermaterials.

SPX FLOW_CU4.. AS-interface_IECEx_Zone 2_GB-1_062023_for D4. Valves.indd
GB
Control Unit
CU4** AS-interface IECEx Zone 2 Gas for D4* Valves IECEx Zone 2 Gas
Instruction manual: GB - rev. 1
18
SPX FLOW
4. MechanicsandPneumatics
4.5. Solenoidvalves
In the base of the control unit max. 3 solenoid valves are installed.
The 3/2-way solenoid valves are connected with the electronic
module by moulded cables and plug connectors.
Control: effected by pwm-signal
Lever:  rotary switch at valve
4.6. Throttlingfunction
The operating speed of the valve actuator can be varied or reduced.
This may be necessary to slacken the actuation of the valve in order
to prevent pressure hammers in the piping installation. For this
purpose, the supply and exhaust air of the rstsolenoidvalve can
be adjusted via the throttling screws respectively allocated in the
interface of the solenoid valve.
By turning the screws in anticlockwise direction, the inlet or outlet air
is throttled
throttling screws