Type 8735

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1.

General Technical Data

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 5.

Materials

Seal

FKM or EPDM (depending on gas)

Fluidics

PPS, stainless steel 1.4404/316L or others

MFM basic block

Aluminium

System basic block

Aluminium or stainless steel

Total mass

3-channel MFC system: approximately 750 g

Performance data

Nominal flow range (Q

nom)

0.05 l

N/min…20 lN/min (N2)

Maximum operating pressure

(overpressure to atmospheric pressure)

MFM: 6 bar

For MFCs, the maximum operating pressure depends on the medium and nominal valve size.

Measuring accuracy

± 1.5 % of reading ± 0.3 % FS (under calibration conditions)

Repeatability

± 0.15 % FS 2.)

Measuring span

1:50 (higher on request)

Settling time (t

95 %)

< 700 ms (without output filter < 100 ms)

Control valve (proportional valve)

Type 2871 (normally closed)

Electrical data

Operating voltage

24 V DC (standardised electronics)

Power consumption

Typically 8 W (3-channel MFC system)

MFC systems: depending on the number of control loops and the valve power consumption

Residual ripple

± 2 %

Voltage tolerance

± 10 %

Electrical connection

büS/CANopen/I2C variant

Terminal block, 5-pin

Modbus RTU variant

D-Sub 9

Medium data

Operating medium

Air, oxygen, nitrogen, argon, methane (≤ 20 l

N/min)

Hydrogen, helium (≤ 70 l

N/min)

Carbon dioxide (≤ 10 l

N/min)

Propane (≤ 6 l

N/min)

Calibration medium

Operating gas or air

Medium temperature

0 °C…+ 50 °C

Process/Port connection & communication

Port connection

G ⅛, NPT ⅛ (others on request)

Digital communication interface

I2C, büS/CANopen, Modbus RS485/RTU list 0 and list 1

Approvals and conformities

Degree of protection

IP00

Foods and Beverages/Hygiene

Further information can be found in chapter “2.4. Foods and beverages/Hygiene” on page

4.

Environment and installation

Installation position

Horizontal or vertical

Ambient temperature

0 °C…+ 50 °C

Accessories

Software

Bürkert Communicator

Further information can be found in chapter “7.1. Bürkert Communicator Software” on

page 10.