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technical article
Comparison of annular orifice plate flowmeter in various media
2012-1-19 12:37:15

Application in dirty media such as coke oven gas and semi-water gas


This type of fluid contains dust, tar, naphthalene, sulfide, and water. There are many problems encountered when using other instruments. This product is very popular with users. In terms of instrument structure, welding is performed where the pressure equalizing ring and multiple pressure taking ports are opposite.

A section of the sewage pipe with the same inner diameter as the pressure taking pipe is connected to a ball valve. The ball valve is opened when the sewage is cleaned or it is dredged with purlins when it is out of air. You can also use a special structure to insert the wall of the pipe to clean the air Pressure tube


Application in superheated steam, saturated steam and other media


When this type of fluid medium is stopped, part of it becomes condensate due to heat loss. When using a standard orifice plate, due to the blocking of the edge of the plate (some orifice plates have small holes, but due to The holes are too small, almost

It does not work). Water exists in the bottom of the pipeline. When the steam is restored, the water is carried by the orifice through the orifice plate. Because of the two-phase flow, it cannot be accurately measured. Water hammer may even occur, and the damage is critical. If a circular orifice plate is used,

The condensed water can flow away from the edge of the orifice plate, and will not accumulate on the throttle attachment, so there will be no measurement error. It should be noted that the vertical pipeline is installed to ensure that the fluid flows from the bottom to the top. Can't let steam directly

Entering the transmitter, the two pressure vessels of the transmitter must withstand equal pressure of the condensate liquid column.


Application in cooling liquid water and other dirty liquid media,

In the industrial process, the equipment is often cooled with circulating water. The cooling water is generally dirty and may contain rust. The use of electromagnetic flowmeters is affected by ferromagnetic substances and reading is not stable enough. If using a venturi


在这介质中 The volume of the instrument is too large and the installation is not convenient enough (circulating water pipelines are usually laid underground and the instrument is installed in a trench, and the volume of the instrument is too large to increase the difficulty of construction and maintenance).

It is more convenient.


Application in hot air flow measurement of blast furnace

Hot blast furnaces need to send hot air. Hot blast furnaces are generally closer to the blast furnace and have more elbows. In the past, standard orifice plates have been used, and the error is large because the straight pipe section is not long enough. Because this instrument has a pressure equalizing ring and multiple pressure taking ports, it needs 2D long straight

The pipe section is sufficient. Can be used after being installed on the hot air stove duct


Overview:

是我公司在标准孔板的基础上研发的节流式流量传感器,由于它采用环形通道式结构,使测量的各种脏污介质在通过孔板与管道之 XXLGHX series annular orifice flowmeter is a throttling flow sensor developed by our company on the basis of standard orifice plate. Because it adopts the annular channel structure, it can measure various dirty media through the orifice plate and pipeline.

It can be easily passed between the loops. Therefore, the annular orifice flowmeter is widely used in the flow measurement of dirty media.

Features:

1. Measure liquid or gas containing solid particles;

2. No long straight pipe section is required, and it can work in harsh pipeline conditions;

3.Suitable for the measurement of saturated steam, compressed air, gas, furnace exhaust gas, cooling water, condensate, and various corrosive chemical solutions and various fluid media;

4. Small pressure loss and low power consumption;

5. The outflow coefficient is stable, high precision and reliability under harsh conditions;

主要技术参数: Main technical parameters of annular orifice plate flowmeter :

1. Nominal diameter: DN50 ~ DN3000

2. Working temperature: -200 ~ 450 ℃

3. Nominal pressure: -0.1 ~ 40MPa

4. Accuracy: 1.0% 1.5% 2.0%

5. Connection method: flange connection, welding connection