Straight tube section of electromagnetic flowmeter

The installation of the electromagnetic flowmeter can ensure the length of the straight pipe segment, so as to ensure the precision of the accurate measurement.

The installation site of the electromagnetic flowmeter is strictly required, and the straight pipe section on the installation site is also strictly required. For one section, install the front section with 5 times the pipe diameter, and the back section with 3 times the pipe diameter.

In order to obtain the normal measurement accuracy, the electromagnetic induction flow sensor upstream and downstream has to have a certain length of straight pipe segment, but the length of the comparison with most other flow meters is lower.After the full cut-off valve is opened, it is generally considered that if the straight pipe segment with a diameter of 5 times (5D) from the electric axis of the electromagnetic flowmeter (not the connection surface of the inlet end of the controller), the valve with different opening needs 10D;

The downstream straight pipe segment is (2-3)D or not specified;But avoid the disc valve insert into the measuring tube of the controller.The distance between the upstream and downstream straight pipes is not the same as specified in the specifications or metrological verification regulations, which is higher than the general requirements.This is due to the requirements of today's 0.5 class precision instruments.

Electromagnetic flowmeter for the straight section of the provisions:

The electromagnetic flowmeter must be installed horizontally on the pipe (the pipe deflection is within 50). The flowmeter axis power bar flowmeter line should be concentric with the center line of the pipe when installed, and the inflow should be consistent.

The length of the upstream and downstream pipelines of the electromagnetic flowmeter shall be equal to the straight pipe section no less than 2D. If the installation site is allowed, the upstream straight pipe section shall be 20D and the middle and downstream pipeline shall be 5D.

Requirements for penetration of electromagnetic flowmeters:

The nominal diameter of the upstream and downstream through-pipe at the installation point of the flowmeter is the same as the inner diameter of the flowmeter.

Specification of electromagnetic flowmeter for bypass valve tube:

In order to ensure that the maintenance of the flow meter does not affect the normal use of the material, the front and rear pipelines of the flow meter should be equipped with a cut-off valve (stop valve), in addition to the bypass valve pipeline should be installed.The flow control valve should be installed in the middle and lower reaches of the flowmeter. The cut-off valve installed upstream of the flowmeter must be fully open to prevent fluid dynamics of the upstream part from causing unsteady flow.

Regulations on environmental factors of electromagnetic flowmeter:

The flowmeter had better be installed in the room, must want to install when outdoor, heat insulation treasure book must choose to prevent bask in isolation, prevent rain.

The flow meter can meet the needs of most markets, including water, oil, food, lubricating oil, chemistry, cosmetics, ink, pharmaceutical, coating, petroleum, automobile, glue, polyurethane, electrolyte and additives.