LGB-F-25-0.6-throttling flow meters
Measure flow through the flow rate of the medium in the pipeline has a variety of, but one of the most widely applied, throttling device is the most common, its use has a long history, in the international and domestic have been standardized, in the production process of petroleum, chemical, metallurgy, electric power, textile, research and other industries, large use various types of throttling device for measurement of fluid flow, control and regulation and throttle device has advantages of simple and firm structure, reliable work, stable performance, high accuracy and low price. Therefore, the amount of throttle device and other flow meter compared to occupy absolute advantage.
The throttle device and differential pressure flow transmitter is used, the field measuring range can be adjusted, and the output standard signal (0~10mAD, C, C, 4~20mAD) can be input to the two meters.
The throttling device comprises a standard throttle device (including standard orifice plate, standard nozzle, standard Venturi tube), and non standard throttling device (including 1/4 round nozzle, 1/4 round hole plate, double hole plate, round hole plate, conical orifice plate, etc.), and the pressure method has the ring chamber pressure, flange pressure, and when the fluid Reynolds coefficient is lower or containing impurities, can choose non standard throttle device.
Main product parameters
Design, manufacture and installation follow the international standard ISO5167-1 (1991) (national standard GB/T2624-93), British standard BS1042 and other standards.
Nominal diameter (mm): 25, 40, 50, 65, 100125, 300, 350400, 450, 500, 600, 700, 800, 900, 1000, 1200, 80
Nominal working pressure (MPa): 0.6, 1, 1.6, 2.5, 6.3, 10, 16, 4
(1) on the standard orifice plate, the standard nozzle: a variety of factors affecting the measurement error, if the installation is in line with international standards ISO517-1 (1991) the relevant provisions, the accuracy level can reach 1~1.5 level.
(2) to the non - standard orifice plate (such as double orifice, segmental orifice, orifice plate, etc.), due to the insufficient experimental data, there is no "standard" can be found. So we should design and manufacture after the completion of the calibration. (usually water calibration of the liquid flow; and air calibration gas flow) after calibration can achieve accuracy (basic error) level of 1 grade ~1.5 level, if not after calibration, the empirical data calculation, design, accuracy is about 2.5%.
Product model and encoding
The model and meaning of throttling device are as follows
LGB -F/J - XX - X - X - XX - X - X
A B C D E F
The meaning of A~F code is as follows:
A code - nominal diameter of the pipeline using two digit representation
B code - nominal working pressure, with a single digit
C code - nominal diameter pipe diameter series, with a single digit
D code - hole plate type, with two digit representation
E code - hole plate material and flange material, with a single digit said
F code - hole plate attachment, with a single digit
A flange pressure cutting device: by the pressure flange, throttle, sealing gasket and fasteners, with two meters can display instantaneous flow and cumulative total
The throttling device of the B ring chamber: the instantaneous flow and cumulative total amount of the instantaneous flow and the total amount of the two instruments are displayed by the flange, the annular chamber, the throttle part, the sealing gasket and the fastener.