How to install orifice flowmeter and standard orifice flowmeter

The orifice flowmeter is a high range ratio differential pressure flow device that combines a standard orifice plate with a multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter). The orifice flowmeter is a differential pressure generating device for measuring flow. It can measure the flow of various fluids in the pipeline in conjunction with various differential pressure gauges or differential pressure transmitters. The throttling device includes an annular chamber orifice plate, nozzle, etc. The throttling device is used in conjunction with the differential pressure transmitter to measure the flow of liquids, steam, and gases; when the fluid passes through the throttling device in the pipeline, the flow beam forms a local contraction at the throttling device, which increases the flow rate and reduces the static pressure, generating a pressure difference before and after the throttling device. The greater the flow rate, the greater the pressure difference before and after the throttling. The flow rate can be measured by measuring the pressure difference. This method is based on the law of conservation of energy and the law of flow continuity. It is widely used in

Widely used in petroleum, chemical, metallurgy, electric power, light industry and other sectors

Orifice flow meter features:

▲Throttling device structure is simple, firm, and has stable and reliable performance

▲All single-phase flows can be measured, and some mixed-phase flows can also be applied.

▲The standard throttling device can be put into use without actual flow calibration.

▲Integrated orifice plate directly connected to differential pressure transmitter

▲High static pressure: 42mpa

Select the parameters required for the orifice flow meter

1. Pipe diameter (pipe diameter * wall thickness)

2. Medium measured by orifice flowmeter

3. Working temperature of the measured medium

4. Working pressure of the measured medium (maximum pressure, minimum pressure, normal pressure)

5. Working flow of the measured medium (maximum flow, minimum flow, normal flow)

6. Viscosity of the medium being measured

Orifice flowmeter installation and straight pipe section requirements:

(1) The straight pipe sections before and after the throttling device must be straight and must not have any visible bends.

(2) The straight pipe section should be smooth. If it is not smooth, the flow coefficient is multiplied by the roughness correction.

(3) In order to ensure that the flow of the fluid forms a fully developed turbulent velocity distribution 1d before the throttling device, and to make this distribution uniform and axially symmetrical, the straight pipe section must be round. In addition, the roundness requirements for the range 2d before the throttling device are very strict and have certain roundness indicators.

(4) When the upstream side of the throttling device is an open space or a large container with a diameter ≥ 2d, the straight pipe length between the open space or large container and the throttling device shall not be less than 30d (15d). If there are other local resistance devices between the throttling device and the open space or large container, in addition to the minimum straight pipe length 1 specified between the throttling device and the local resistance device, the total straight pipe length from the open space to the throttling device shall not be less than 30d (15d).