Metal tube float flowmeter installation program

Metal tube float flowmeter installation program

Metal tube float flowmeter is suitable for small-bore and low-flow medium flow measurement; reliable operation, small maintenance and long service life; low requirements for straight pipe sections; wide flow ratio of 10:1; double-row large liquid crystal display, optional On-site instantaneous/accumulated flow display with single-axis sensitive indication with backlight; non-contact magnetic coupling drive. Full metal structure, metal tube rotor flowmeter is suitable for high temperature, high pressure and strong corrosive medium; can be used in flammable and explosive hazardous occasions; optional two-wire system, battery, AC power supply mode; multi-parameter calibration function; with data recovery , data backup and power-down protection function. The following describes the installation direction of the instrument for the installation of dirty fluids, the installation of pulsating flow, and the expansion of the scope of installation.

Metal tube float flowmeter installation direction: Most of the float flowmeter must be installed vertically on the vibration-free pipeline, there should be no obvious inclination, and the fluid flows through the instrument from bottom to top. The angle between the center line of the float flowmeter and the vertical line is generally less than 5 degrees, and the high precision (above 1.5) meter θ ≤ 20°. If θ = 12°, a 1% additional error will result. The meter does not have strict vertical pipe length requirements, but there are also manufacturers' requirements (2-5)D length, which is actually not necessary.

Metal tube float flowmeter for dirty fluid installation: The filter should be installed upstream of the meter. A metal tube float flow meter with magnetic coupling should be used to install a magnetic filter in front of the meter when it is possible to contain fluids containing magnetic impurities. To keep the float and the cone clean, especially for small-diameter instruments, the cleanliness of the float significantly affects the measured value.

Installation of pulsating flow of metal tube float flowmeter: pulsation of flow itself, such as reciprocating pump or regulating valve upstream of the position of the instrument to be installed, or large load change downstream, etc., should be changed to the measuring position or remedially improved in the pipeline system, such as Add buffer tank; if the instrument itself oscillates, if the gas pressure is too low during the measurement, the upstream valve of the instrument is not fully open, the regulating valve is not installed downstream of the instrument, etc., it should be overcome by targeted improvement, or the instrument with damping device should be changed. .

Expanded range of metal tube float flowmeters: If the flow range required for the measurement is wide and the range exceeds 10, two floats of different shapes and weights can be placed in one meter, and the floats are taken at a small flow rate. After the float reaches the top, the float reading is taken and the range can be expanded to 50-100.

When the metal tube float flowmeter is used for liquid, pay attention to whether there is residual air in the extension sleeve of the external float displacement, and it must be exhausted; if the liquid contains tiny bubbles, it is easy to accumulate in the casing, and should be exhausted at regular intervals. This is more important for small-diameter instruments, otherwise the impact on the flow rate is obvious.