Type 8718

7 | 10

Visit product website 

5.

Product operation

5.1. Measuring principle

• The sensor measures the flow by means of differential pressure. An orifice in the main channel causes pressure loss at liquid flow

which is measured by the differential pressure sensor. The sensor feedbacks a precise and temperature compensated signal out

of which the electronics calculates the corresponding flow.

• To avoid a blockage of the aperture by contaminated mediums an upstream filter is recommended.

p1

p2

0

5

10

15

bar

0

5

10

15

bar

6.

Ordering information

6.1. Bürkert eShop – Easy ordering and quick delivery

Bürkert eShop – Easy ordering and fast 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

6.2. Recommendation regarding product selection

Note:

For the proper choice of the actuator orifice and differential pressure sensor within the LFC, not only is the maximum flow rate Q

Nom

required, but also the pressure values directly before and after the LFC (p

1, p2) at this flow rate QNom should be known. In general,

these pressures are not the same as the overall inlet and outlet pressures of the whole plant, because usually there are additional

flow resistors (tubing, additional shut-off valves, nozzles etc.) present both before and after the controller.

Please use the „Product Enquiry Form“ at the end of this document to indicate the pressures directly before and after the LFC. If

these should be unknown or not accessible to a measurement, estimates are to be made by taking into account the approximate

pressure drops over the flow resistors before and after the LFC, respectively, at a flow rate of Q

Nom.

In addition, please quote the maximum inlet pressure p

1 max to be encountered. This data is needed to make sure the actuator is

able to provide a close-tight function within all the specified modes of operation. The knowledge of the maximum inlet pressure is

also necessary to select an adequate differential pressure sensor

Please use the „Product Enquiry Form“ at the end of this document and send us a copy of the enquiry with information about the

application.