Data Sheet

ManualsBrandsBürkert ManualsAutomation & PneumaticsBürkert 269244 2/2-way Directly actuated valve 24 Vdc G1/2 sleeve Nominal width 8 mm Enclosure material Brass Sealant FK

1/8www.burkert.com

3285

can be combined with…Type3285

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; additional ac-

tuation modules are

not necessary. The motor’s power con-

sumption 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.

•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

2/2 way Proportional Valve (motor-

driven)

MFM

Type8006

BigFlow

Type8008

MFC/MFM

Type8746

Universal controller

Type8611

Pressure transmitter

Type8311

Technical data

Materials

Body

Housing

Seals

Seat sealing

Brass or stainless steel

PC (Polycarbonate), PPS (Polyphenylene sulde)

NBR for liquids,

EPDM for liquids and special gases (e. g. ammonia,

acetylene),

FKM for neutral gases

Technical ceramics

Medium

Neutral gases, liquids

Seat leakage based on IEC/EN 60534 − 4

Shut-o class IV

Pressure range

0 - 6 bar

Closure time

Ca. 4 sec.

Medium temperature

0 to + 70 °C

Ambient temperature

- 10 to + 60 °C

Power supply 24 V DC ± 10 % (max. residual ripple 10 %)

Power consumption < 1 W in holding position, Max. 12 W (depending on

motor control)

Duty cycle Up to 100 % (depending on uid and ambient tem-

perature)

Port connection G ½, G ¾, G 1, NPT ½, NPT ¾, NPT 1

Typical control data

Hysteresis

Repeatability

Sensitivity

Span

< 5 %

< 1 % FS

1:100

Protection class - valve

IP50

Installation

As required, preferably with actuator upright

Status display

LED (details: see manual)

Dimensions

See drawings on page 5

Weight

~ 800 g (DN8) … 1500 g (DN25)

Pressure data [bar]: Overpressure with respect to atmospheric pressure

Characteristic data of control behaviour depends on process conditions

UR approval

optional

Circuit function

2-way valve for continuous

control, motor driven,

bidirectional

2 (A)

1 (P)

Summary of content (8 pages)

PAGE 1
3285 2/2 way Proportional Valve (motordriven) •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 Type 3285 can be combined with… UR approval optional Type 8006 MFM Type 8008 BigFlow Type 8746 MFC/MFM 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.
PAGE 2
3285 Technical data, continued Device variations Electrical connection Standard ON/OFF Control valve M12 Plug, M12 Plug, A-coded, 8 pin A-coded, 8 pin Input signal (setpoint) Positioner Process controller Analogue Digital (fieldbus) Analogue Digital (fieldbus) M12 Plug, M12 Plug, M12 Plug, M12 Plug, A-coded, 8 pin A-coded, 5 pin A-coded, 8 pin A-coded, 5 pin and and M12 Socket, M12 Socket, A-coded, 5 pin A-coded, 5 pin 4…20 mA, --4…20 mA, --0..20 mA, 0..
PAGE 3
285 Advice for valve sizing In continuous flow applications, the choice of an appropriate valve size is much more important than with on/off valves. The optimum size should be selected such that the resulting flow in the system is not unnecessarily reduced by the valve. However, a sufficient part of the pressure drop should be taken across the valve even when it is fully opened.
PAGE 4
3285 Pin Assignment Analogue version Circular connector M12 − 8 pin 3 4 2 8 5 6 1 7 Pin 1 2 3 4 5 6 7 8 Assignment 24 V DC Power supply GND Internal use6) Internal use6) Internal use6) Signal input + Signal output Signal GND Only for positioners and process controllers version, for connection of the parameterization 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 ordering chart for accessories).
PAGE 5
3285 Electrical control 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 6
3285 Dimensions [mm] Threaded port body MS version F 20 D 77 E X A B C A 8.2 8.6 10.2 - B 13.7 14 16.8 - H C 14 16 18 X G D NPT ½ G½ NPT ¾ G¾ NPT 1 G1 36,2 92.5 E 96.65 96.65 103.34 103.34 108.31 108.31 F 137.95 137.95 147.01 147.01 156.35 156.35 G 30.75 30.75 43 43 49 49 H 58 58 80 80 95 95 I 26.6 26.6 32 32 41 41 Threaded port body VA version D 77 E F 20 A B C A 8.2 8.6 10.2 - B 13.7 14 16.8 - H C 14 16 18 Y G D NPT ½ G½ NPT ¾ G½ NPT 1 G1 36,2 92.5 E 100.25 100.25 107.
PAGE 7
3285 Ordering Chart for Accessories Article Article no.
PAGE 8
3285 Note fill out You can directly the fields F file D P e th in nting before pri rm. out the fo Design data for proportional valves Please fill out this form and send to your local Bürkert Sales Centre* with your inquiry or order Company Contact person Customer no. Dept. Address Tel.