3281

3281 BURKERT | Alldatasheet

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Technical content

Visit product website  DATA SHEET Type 8006  Mass Flow Meter (MFM) Type 8008  Flowmeter for gases Type 8098  FLOWave SAW flowmeter Type ME43  Fieldbus gateway Standard | EU | en | 2023-11-06 | 05 Electromotive 2-way globe proportional valve

• Actuator is not wetted Excellent setting range and fast reaction time Connection orifice DN 15 Medium temperature up to 130 Variants: positioner, process controller The direct-acting motor valve type 3281 is particularly suitable for dosing liquids and gases in closed or open control loops. The valve is driven by a linear stepper motor. The integrated electronics assembly simplifies the process integration; additional actuation modules are not necessary. The engine does not need any energy to maintain a certain valve opening. This feature can reduce the energy consumption of a plant dramatically and therefore make it more efficient. Type 3281 is available as a variant with integrated positioner, as well as a variant with integrated process controller. Product variants described in the data sheet may differ from the product presentation and description. Type description Can be combined with Type 3281 © Christian Bürkert GmbH & Co. KG, Subject to alteration

2 | 17Visit product website  Table of contents 1. General technical data 3 1.2. Electrical control and interfaces 2. Approvals and conformities 4 2.2. Conformity 2.3. Standards 2.4. Foods and beverages/Hygiene 3. Materials 5 3.2. Material specifications 4. Dimensions 6 4.2. Threaded version 4.3. 2/2-way module body 4.4. Welded version 4.5. Capacitive buffer module 5. Device/Process connections 11 5.2. Digital (fieldbus) 6. Performance specifications 12 6.2. Pressure range Standard version 6.3. Flow characteristic Exemplary characteristic curve of the motor valve 7. Product operation 14 Product accessories 8.2. Bürkert Communicator Software Connection Type 3282 with Bürkert Communicator software 9. Ordering information 16 9.2. 9.3. Bürkert product filter 9.4. Bürkert Product Enquiry Form 9.5. Ordering chart accessories Standard accessories Accessories cable Bürkert accessories

3 | 17Visit product website  1. General technical data 1.1. General Product properties Dimensions Further information can be found in chapter “4. Dimensions” on page 6 Material Further information can be found in chapter “3.2. Material specifications” on page Valve body Stainless steel Seal PTFE Design Globe control valve Connection nominal diameter DN 15, NPS Safety setting in case of power failure With capacitive buffer module as accessory, see chapter “4.5. Capacitive buffer module” on page Flow direction Against closing direction (below seat) Controller variant Position controller or process controller Weight ~1.1 kg Status indicator LED (Refer to the operating instructions for more information.) LED (Refer to the operating instructions Type 3281 for more information.) Performance data Typical values of positioning behaviour1.) Dead band of the position control ± 0.5 % (corresponds to setting range 1:100) Closing time 2.5 s Operating pressure 0…16 bar(g) (depending on seat size, see chapter “6.2. Pressure range” on page 12 Nominal pressure PN 25 (DIN EN 1333) KVS value 0.57…2.25 m³/h (see chapter “6.2. Pressure range” on page 12 ) Seat leakage (DIN EN 60534 4) Class VI Electrical data Operating voltage 24 V DC ± % (max. residual ripple 10 Duty cycle Up to 100 % (depending on medium and ambient temperature) Power consumption < W holding power Max. 12 W (short term 20 Medium data Operating medium Neutral gases, liquids Medium temperature - °C…130 Viscosity Max. 600 mm²/s (cSt) Process/Port connection & communication Port connection2.) • Threaded connection G (EN ISO 228 Rc (EN ISO 228 1, ISO DIN EN 10226 NPT (ASME B 1.20.1) Welded connection DIN EN ISO 1127/ISO 4200/DIN 11866 B DIN 11850 2/DIN 11866 A/DIN EN 10357 A Communication and control Standard signal (analogue) Setpoint: 0/4…20 mA, 0…5/10 V and digital input, see chapter “1.2. Electrical control and inter- faces” on page 4 Fieldbus (digital) • Bürkert system bus (büS) CANopen (optional) EDIP Field device for integration into the EDIP platform via Bürkert system bus (büS) Further information can be found in chapter “8.2. Bürkert Communicator Software” on page 15 Approvals and conformities Degree of protection IP54 Foods and beverages/Hygiene Further information can be found in chapter “2.4. Foods and beverages/Hygiene” on page 4

4 | 17Visit product website  Environment and installation Installation position As required, preferably with actuator upright Ambient temperature - °C…+ °C (Derating see chapter “6.1. Duty cycle derating diagram” on page 12 1.) The characteristic values of the control behaviour depend on the operating conditions. 2.) Others on request 1.2. Electrical control and interfaces Technical data Device variants Positioner (C) Process controller (D) Analogue Digital (fieldbus) Analogue Digital (fieldbus) Electrical connection M12 plug, A-coded, 8-pin M12 plug, A-coded, 5-pin M12 plug, A-coded, 8-pin and M12 socket, A-coded, 5-pin M12 plug, A-coded, 5-pin and M12 socket, A-coded, 5-pin Input signal (set-point value) 4…20 mA, 0…20 mA, 0…10 V or 0…5 V – 4…20 mA, 0…20 mA, 0…10 V or 0…5 V Input signal (actual value of ext. sensor) – – 4…20 mA, 0…20 mA, 0…10 V or 0…5 V 4…20 mA, 0…20 mA, 0…10 0…5 V or frequency (5…2.000 Hz) Input impedance for analogue input 60 Ω (Current), 22 kΩ (Voltage) – 60 Ω (current), 22 kΩ (voltage) 60 Ω (current), 22 kΩ (voltage) Output signal (actual value) 0/4…20 mA (max. Load: 560 Ω), 0…5/10 V (max. Current: 10 mA) – 0/4…20 mA (max. load: 560 Ω), 0…5/10 V (max. current: 10 mA) Fieldbus interface – büS/CANopen – büS/CANopen Parameterisation tool Bürkert Communicator (connection via büS stick) Bürkert Communicator (connection via büS stick) Bürkert Communicator (connection via büS stick) Bürkert Communicator (connection via büS stick) 2. Approvals and conformities 2.1. General notes

• The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the pro duct complies with all required specifications. Not all available versions can be supplied with the below menti oned approvals or conformities. 2.2. Conformity In accordance with the Declaration of conformity, the product is compliant with the EU Directives. 2.3. Standards The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity. 2.4. Foods and beverages/Hygiene Conformity Description EC Regulation 1935/2004 of the European Parliament and of the Council All wetted materials are compliant with EC Regulation 1935/2004/EC according to the manufacturer‘s declaration.

5 | 17Visit product website  3. Materials 3.1. Bürkert resistApp Bürkert resistApp – Chemical resistance chart You want to ensure the reliability and durability of the materials in your individual application case? Verify your combination of media and materials on our website or in our resistApp. Start chemical resistance check 3.2. Material specifications Note: The globe control valve Type 3281 is supplied with various port connections. These connections are not shown completely. However, they correspond to the material of the valve housing. Actuator No. Element Material

1 Housing cover PC (Polycarbonate)

2 Housing base PPS (Polyphenylene sulfide)

Nr. Element Material

3 Spindle guide High-performance polymer

4 Sliding washers High-performance

5 Guide piece Stainless steel 1.4305

6 O-ring NBR

7 Compression spring Stainless steel

8 Spindle seal PTFE (filled)/FKM, with

9 Pipe Stainless steel 1.4404

10 Body seal Graphite

11 Spindle Stainless steel 1.4401 12 Control cone Stainless steel 1.4571

13 Seat seal PTFE sealing washer

14 Valve seat Stainless steel 1.4571

15 Valve body Stainless steel CF3M

6 | 17Visit product website  4. Dimensions 4.1. Actuator Note: Dimensions in mm Twisting of the actuator housing is possible, see operating Instructions Type 3281 A E D C B J H I F G A B C D E F G H I J 76 216 188 84 112 52 66 45 58 20

7 | 17Visit product website  4.2. Threaded version Note: Dimensions in mm LM E D AF Connection nominal diameter (Pipe) G, Rc, NPT (EN ISO 228 - 1, ISO 7/1/DIN EN 10226 - 2, ASME B 1.20.1) D E LM AF DN NPS G NPT Rc 15 ½ 14 13.7 13.2 65 27

8 | 17Visit product website  4.3. 2/2-way module body Note: Dimensions in mm Connection 3 or 4 can be blanked LM1 LM2 D E Connection nominal diameter (Pipe) G (EN ISO 228 - 1) D E LM1 LM2 DN NPS G 15 ½ 16 86.5 47.5

9 | 17Visit product website  4.4. Welded version Note: Dimensions in mm DS WS ES LS Connection nominal diameter (Pipe) ES LS EN ISO 1127 1/ISO 4200/ DIN 11866 B DIN 11850 2/DIN 11866 A/ DIN EN 10357 A DN ØDS WS ØDS WS 15 20 90 21.3 1.6 19 1.5

10 | 17Visit product website  4.5. Capacitive buffer module Note: Dimensions in mm Further information can be found in chapter “8.1. Accessories capacitive buffer module” on page 127 63.5 182 179 186.5

11 | 17Visit product website  5. Device/Process connections 5.1. Analogue Note: For parameterisation and configuration of the positioner and the process controller variants, please use the Bürkert Communicator software tool, see “8.2. Bürkert Communicator Software” on page 15 Circular connector M12, 8-pin Pin Configuration 1 24 V DC

2 Power supply GND

3 Internal use1.) 4 Internal use1.) 5 Internal use1.)

6 Signal input +

7 Signal output

8 Signal GND

Only for positioners and process controllers variant, for connection of the parameterisation tools: Bürkert Communicator. The connection is via the büS-Stick. Using an adapter cable (M12 8-pin to M12 5-pin) the büS-Stick can be connected (see “9.5. Ordering chart accessories” on page 17). Additional for process controller variant: Socket M12, 5-pin Pin Configuration 1 24 V DC sensor power supply

2 Analogue IN (0…20 mA, 4…20 mA, 0…5 V or 0…10 V)

3 GND

4 GND (bridge according to GND pin

5 Not connected

5.2. Digital (fieldbus) Note: For parameterisation and configuration of the positioner and the process controller variants, please use the Bürkert Communicator software tool, see “8.2. Bürkert Communicator Software” on page 15 Circular plug M12, 5-pin Pin Configuration

1 Shielding

V DC

4 CAN high

5 CAN low

Additional for process controller variant: Socket M12, 5-pin Pin Configuration 1 24 V DC sensor power supply

2 Analogue IN (0…20 mA, 4…20 mA, 0…5 V, 0…10 V or

frequency)

12 | 17Visit product website  6. Performance specifications 6.1. Duty cycle derating diagram Note: The duty cycle is an important factor for motor valves. The self-heating of the engine limits the maximum duty cycle. High ambient temperatures additionally increase the risk of damage due to overheating. The following diagram shows the recommended maximum duty cycle as a function of the ambient temperature. In energy-saving mode (lower driving force), higher duty cycles are possible. The motor is optimised for the valve function in terms of size, power consumption and costs. The duty cycle does not mean the duty cycle of the device but the duty cycle of the motor. This is only switched on when the valve is to move. Frequent set-point value changes drastically increase the duty cycle of the motor. Operating the valve outside the recommended duty cycle limits will result in a significantly reduced service life of the valve. 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient temperature [°C] Duty cycle [%] Derating curve for max. medium temperature (130 °C) 6.2. Pressure range Standard version Note: For orders from our standard product range, use the product filter in our eShop (see “9.1. Bürkert eShop” on page 16 Alternatively, you can use the Product Enquiry Form (see “9.4. Bürkert Product Enquiry Form” on page 17 ) for information about the device layout and send it to us after completion. Valve function Seat size Port connection K VS value Pressure range [mm] [m³/h]1.) [bar(g)] Control valve, without safety position in case of power failure 4 G ½ 0.57 0…16 6 G ½ 1.25 0…16 8 G ½ 1.8 0…12 10 G ½ 2.25 0…7 1.) Flow value for water, measurement at + 20 °C, 1 bar pressure difference above the fully open valve

13 | 17Visit product website  6.3. Flow characteristic Determination of the KV value Note: Once the KV-value required for the application has been calculated, it can be compared with the KVS-values from the ordering chart. The KVS-value must be higher than the KV-value of the application, but should be neither too high nor too close to it - as a recommendation: % higher. Pressure drop KV value for liquids KV value for gases [m3/h] [m3/h] Sub-critical p2 > 2 = Q ρ Δp1000 = Q 514 QN ρNT1 Δ pp2 Supercritical p2 < 2 = Q ρ Δp1000 = Q QN ρNT1 257 p1 KV Flow coefficient [m3/h] 1.) QN Standard flow rate [mN 3/h] 2.) p1 Inlet pressure [bar] 3.) p2 Outlet pressure [bar] 3.) ∆p Differential pressure p 1…p2 [bar] ρ Density [kg/m3] ρN Standard density [kg/m3] T1 Medium temperature [(273+t)K] 1.) Measured for water, ∆p = bar 2.) Under reference conditions 1.013 bar and 0 °C (273 3.) Absolute pressure Exemplary characteristic curve of the motor valve Note: The design of the seat size is very important for the proper functioning of electromotive proportional valves within the application. The seat size must be selected in such a way that, on the one hand, the desired flow range is achieved and, on the other hand, when the valve is fully open, a sufficient part of the total pressure drop takes place via the valve. Reference value: Δp valve % of the total pressure drop Otherwise, an ideal, linear valve characteristic is deformed into a curved system charac teristic. 100 0 10 20 30 40 50 60 70 80 90 100 KV/KVS [%] Stroke [%] Linear flow characteristic - the KVS values of the respective seat sizes can be found in chapter “6.2. Pressure range” on page 12.

14 | 17Visit product website  7. Product operation Process diagram Description Valve opening Electromotive actuator Position sensor PositionerSet-point position CMD CTRL POS POS Position control loop + - Valve body Xd1 Positioner variant The proportional valve in the position control variant converts an external standard signal, the position set-point value, into a valve position. The position of the actuator is controlled according to the set-point position. The position sensor records the current position (POS) of the electromotive valve. This actual position is compared by the positioner with the set-point value (CMD) specified as the standard signal. If there is a control difference (Xd1), a motor control signal is given to the actuator as the actuating variable. Z1 is a disturbance value. The two end positions of the valve are indicated by the LED status. In addition, the actual position recorded by the position sensor is output via the M12 circular plug-in connector. Process controller Position control loop SP CMD PV Measured quantity Xd2 Transmitter ProcessProcess set point value Valve opening Process controller variant The additionally implemented PID controller can perform not only the actual position control but also a process control in the sense of a cascade control. The process controller is integrated into a control loop. The position setpoint of the valve is calculated from the process setpoint and the actual process value via the control parameters (PID controller). The process setpoint can be specified by an external signal. During the process control the position control mentioned above becomes the subordinate auxiliary control circuit; this results in a cascade control. The process controller in the main control circuit has a PID function. The process set-point value (SP) is specified as a set-point value and is compared with the actual value (PV) of the process variable to be controlled. The position measuring system records the current position (POS) of the electromotive linear actuator. This position actual value is compared by the position controller with the set-point value (CMD) specified by the process controller. If there is a control difference (Xd2), the actual position (POS) and therefore the valve opening are changed by the control variable (CTRL). Z2 represents a disturbance variable.

15 | 17Visit product website  8. Product accessories 8.1. Accessories capacitive buffer module Note: See “4.5. Capacitive buffer module” on page for information about dimensions. See “Standard accessories” on page 17 for ordering information. Accessories Description Motor valve(s) connection

24 V DC power supply

For example: Single phase, primary switched mode power supply Type 1573

• Capacitive buffer module for moving to a safety position in case of power failure In order to be able to move to a safety position of the valve in the event of a power failure, the valve must be supplied with voltage via the capacitive buffer module . In the event of a power failure, the buffer module provides an output voltage of 18 V DC for a few seconds. The reduced input voltage is detected by the valve and the safety position is approached accordingly. Up to 3 valves of Type 3280 or 2 valves of Type 3281 and Type 3285 can be connected to a buffer module. Factory setting of the safety position: “valve closed” For standard variant (functionality available from software version A.08): Adjustable via DIP switch (when the operating direction is reversed, the safety position changes to “valve open”) For positioner and process controller variant (functionality available from software version A.06): Adjustable via Bürkert Communicator (user-defined safety position) 8.2. Bürkert Communicator Software Note: An adjustment of the valve by the Bürkert Communicator is only possible with the positioner or process controller variants. The corresponding communication software can be downloaded from the website Type 8920 The Bürkert Communicator is the most important software component of the EDIP (Efficient Device Integration Platform). Various features of this universal tool simplify the configuration and parametrisation of devices equipped with a digital CANopen-based interface. With this tool, the user has a complete overview of cyclic process values as well as acyclic diagnostic data. The integrated graphical programming environment enables the creation of decentralised sub-system control functions. The connection to the PC is established with a USB-CAN adapter. The adapter is available as an accessory (see “9.5. Ordering chart accessories” on page 17 The Bürkert Communicator enables: Configuration, parametrisation and diagnosis of EDIP devices / networks Easy and comfortable mapping of cyclic values Graphical display of process values Firmware update for the connected EDIP devices Backup and restoring of device configurations

16 | 17Visit product website  Connection Type 3282 with Bürkert Communicator software The interface to the “Bürkert Communicator” software tool is based on CANopen. A corresponding bus termination is mandatory. For variants with standard signal interfaces, please activate the switchable terminating resistor on the büS stick. For variants with büS/ CANopen communication interface, this terminating resistor should not be switched on if the device is already integrated in a properly terminated bus network. A büS stick is required to connect the motor valve to the “Bürkert Communicator” software tool. The büS stick sets contain the neces sary accessories. For variants with büS/CANopen communication interface, the connection is made directly via the 5-pin M12 plug (büS stick set 1 contains the necessary accessories). Variants with standard signal interfaces are connected via the 8-pin M12 plug on the device (büS stick set 1 + büS adapter; socket 8-pin M12 to plug 5-pin M12 contain the necessary accessories). 9. Ordering information 9.1. Bürkert eShop Bürkert eShop – Easy ordering and quick delivery You want to find your desired Bürkert product or spare part quickly and order directly? Our online shop is available for you 24/7. Sign up and enjoy all the benefits. Order online now 9.2. Recommendation regarding product selection Note: The configuration of the seat size is very important for proportional valves to ensure proper functioning within the application. The seat size must be selected in such a way that on the one hand the desired flow range is achieved and on the other hand a sufficient part of the total pressure drop across the valve takes place when the valve is fully open. Reference value: pressure drop of the valve > % of the total pressure drop Let Bürkert engineers advise you already in the planning phase. 9.3. Bürkert product filter Bürkert product filter – Get quickly to the right product You want to select products comfortably based on your technical requirements? Use the Bürkert product filter and find suitable articles for your application quickly and easily. Try out our product filter

17 | 17Visit product website  9.4. Bürkert Product Enquiry Form Bürkert Product Enquiry Form – Your enquiry quickly and compactly Would you like to make a specific product enquiry based on your technical requirements? Use our Product Enquiry Form for this purpose. There you will find all the relevant informa- tion for your Bürkert contact. This will enable us to provide you with the best possible advice. Fill out the form now 9.5. Ordering chart accessories Standard accessories Description Article no. Power supply unit Phoenix Class2 (Type 1573), 85…240 V AC/24 V DC, 1.25 A, NEC Class 2 (UL 1310) 772438 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 1 A, NEC Class 2 (UL 1310) 772361 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 2 A, NEC Class 2 (UL 1310) 772362 Power supply unit for standard rail (Type 1573), 100…240 V AC/24 V DC, 4 A 772363 Buffer module (Type 1573) for safety position when power failure 773440 Accessories cable Description Article no. M12 circular socket with cable, 8-pin, cable length: 2 m, ready-made cable for input and output signals (for analogue variant) 919061 M12 circular female connector with cable, 8-pin, cable length: 2 m, ready-made shielded cable for input and output signals (for analogue variant) 918991 M12 cable shielded, 5-pin, cable length: 2 m, ready-made shielded cable for actual process value input signals (only for variant with analogue/digital process controller) 559177 Bürkert accessories Note: For connection to a büS/CANopen network, see cabling guide . Detailed accessory tables can be found in the cabling guide. Can only be used with positioner and process controller variant. Description Article no. Software Bürkert Communicator Type 8920 büS adapter, M12 socket, 8-pin to M12 plug, 5-pin (for büS stick connection) 773286 USB büS interface set 1 (Type 8923) for connection to the Bürkert Communicator software: including connection cable (M12 and micro USB), stick with integrated terminating resistor, power supply and software 772426 USB büS interface set 2 (Type 8923) for connection to the Bürkert Communicator software: including büS stick, connec- tion cable to M12 plug, M12 connection cable on micro USB for the büS service interface and Y distributor, cable length: 0.7 m 772551