Data Sheet

ManualsBrandsBürkert ManualsAutomation & PneumaticsBürkert Directly actuated valve 269244 3285 24 V DC G1/2 sleeve Nominal width 8 mm 1 pc(s)

Table Of Contents

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DATA SHEET

Type 8006



Mass Flow Meter

(MFM)

Type 8008



Flowmeter for gases

Type 8746



Mass ow controller

(MFC) / Mass ow me-

ter (MFM) for gases

Type 8611



eCONTROL - Universal

controller

Type 8311



Pressure measuring

device / Switch

1000256911 | Standard | EU | en | 202010 | 15

2/2way Proportional Valve (motor-driven)

• Actuator isolated from ow path

• Excellent range and fast response times

• Low power consumption

• Orice sizes 8 to 25mm

• Versions: Standard, positioner, process controller

The direct-acting motor valve of type 3285 is used for dosing of liquids and

gases in closed or open control loops. The valve features a stepper motor as

the actuator. The integrated electronics simplies the process integration; ad-

ditional actuation modules are not necessary. The motor’s power consump-

tion to hold a specic opening position of the valve is zero. This key feature

can reduce the energy consumption of a plant dramatically and thus make it

more ecient. Type 3285 is available as a standard ON/OFF or proportional

valve, as a version with integrated positioner and as a version with integrated

process controller.

Product variants described in the data sheet may dier from the product presentation and description.

Type descriptionCan be combined with

Type 3285

Summary of content (15 pages)

PAGE 1
DATA SHEET Type 3285 2/2 way Proportional Valve (motor-driven) • Actuator isolated from flow path • Excellent range and fast response times • Low power consumption • Orifice sizes 8 to 25 mm • Versions: Standard, positioner, process controller Product variants described in the data sheet may differ from the product presentation and description.
PAGE 2
Type 3285 Table of contents 1. General Technical Data 1.1. 1.2. 2. 3. Chemical Resistance Chart – Bürkert resistApp....................................................................................................................4 Material specifications............................................................................................................................................................5 5 Threaded body............................................................................
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Type 3285 1. General Technical Data 1.1. General Product properties Dimensions Detailed information can be found in chapter “3. Dimensions” on page 5. Material Fluid body Valve body Seal Brass or stainless steel PC (Polycarbonate), PPS (Polyphenylene sulfide) NBR for liquids EPDM for liquids and special gases (e. g.
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Type 3285 1.2. Standard, positioner and process controller version Technical data Electrical connection Input signal (setpoint) Input signal (actual value from ext. Sensor) Input impedance for analogue input Output signal (actual value) Fieldbus interface Parameterization Tool 2.
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Type 3285 2.2. Material specifications Nr. 1 2 3 1 2 9 3 8 7 6 4 3. Element Spindle seat Spindle Upper fluids housing 4 5 6 Control disc Fixed seat disc Fluidic body 7 8 9 O-Ring O-Ring Spring Material Stainless steel FKM/EPDM/NBR PPS Polyphenylene sulfide Technical ceramics Technical ceramics Brass or Stainless steel FKM/EPDM/NBR FKM/EPDM/NBR Stainless steel 5 Dimensions 3.1. Threaded body Note: Dimensions in mm F 20 D 77 E X A B C A 8.2 8.6 10.2 - B 13.7 14 16.
PAGE 6
Type 3285 3.2. Capacitive buffer module Note: • Dimensions in mm • Detailed information can be found in chapter “7.1. Accessories capacitive buffer module” on page 11. 9 17 6.5 18 3 91 63.
PAGE 7
Type 3285 4. Device/Process connections 4.1. Analogue Note: For parameterisation and configuration of the positioner and the process controller versions, please use the Bürkert Communicator software tool, “7.2. Software Bürkert Communicator” on page 11. Circular connector M12, 8 pin 4 3 2 8 5 6 1 7 Pin 1 2 3 4 5 6 7 8 Configuration 24 V DC Power supply GND Internal use1.) Internal use1.) Internal use1.
PAGE 8
Type 3285 5. Performance specifications 5.1. Duty cycle derating diagram Note: • For motor valves it is essential to know the duty cycle during operation. Self-heating of the motor limits the maximum duty cycle. High ambient temperatures amplify the risk of damage due to overheating. The diagram below shows the suggested duty cycles dependent on the ambient temperature. Running the motor control valve in the power saving mode (lower actuator force) allows higher duty cycles.
PAGE 9
Type 3285 5.2. Pressure range Note: Please use the product filter of our eShop on the Bürkert website to order from the standard program. Alternatively, the form can be used at the end of the data sheet. Valve function Control valve, without safety position in case of power failure Nominal diameter/ Orifice [mm] 8 10 12 15 20 25 Port connection1.) KVS-value water Pressure range3.) G½ G½ G¾ G¾ G1 G1 [m³/h]2.) 1.8 2.5 3.9 5.4 8.1 9.6 [bar(g)] 6 6 6 6 6 6 1.
PAGE 10
Type 3285 6. Product operation Standard on/off valve In the ON / OFF version, an external voltage signal is digitized and the valve is closed or opened. The status of the two end positions of the valve are indicated on the LED. In addition, the valve position “closed” is reached via the digital output. Standard control valve The standard proportional valve converts an external standard signal (position set-point value) into a valve position. Both valve end positions are indicated by the LED status.
PAGE 11
Type 3285 7. Product accessories 7.1. Accessories capacitive buffer module Note: • Dimensions see “3.2. Capacitive buffer module” on page 6. • Ordering information see “8.4. Ordering chart accessories” on page 12.
PAGE 12
Type 3285 Connection Type 3285 with Bürkert Communicator software The interface to the “Bürkert Communicator” software tool is based on CANopen. A corresponding bus termination is mandatory. For versions with standard signal interfaces, please activate the switchable terminating resistor on the büS stick. For versions 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.
PAGE 13
Type 3285 Description Power supply Type 1573 for rail mounting, 100 − 240 V AC/ 24 V DC, 1 A Power supply Type 1573 for rail mounting, 100 − 240 V AC/ 24 V DC, 2 A Power supply Type 1573 for rail mounting, 100 − 240 V AC/ 24 V DC, 4 A Buffer module Type 1573 for safety position when power failure Article no.
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PAGE 15
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