Type 2852

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6.

Performance specifications

6.1. Flow characteristic

Note:

The design of the nominal size of proportional valves is very important for the correct functioning within the application. The nominal size

must be selected so that, on the one hand, the desired flow range is achieved and that, on the other hand, a sufficient part of the total

pressure drop occurs via the valve when the valve is fully open. This means that the flow range in the controlled system is completely

determined by the proportional valve.

The flow characteristics shown below have been recorded without back pressure and are purely exemplary. The flow characteristics may

vary due to specific installation situations and operating conditions.

The valve Type 2852 is suitable for applications with back pressure. With a high inlet pressure in conjunction with a high back pressure, it

should be noted that the flow characteristic curve has an increasingly high gradient in some areas and that discontinuities may occur. High

thermal load combined with high inlet pressure may have an impact on the flow characteristic in the lower flow range. This can have a

negative effect on the control behaviour.

For further information and support with the design, please contact your local Bürkert partner.

Flow characteristics as a function of the coil current

0

50

100

150

200

250

300

350

40

60

80

100

120

140

I [mA]

1 bar

2.5 bar

5 bar

7 bar

Maximum flow rate as a function of the operating pressure

0

50

100

150

200

250

300

350

0

1

2

3

4

5

6

7

P [bar

g]