Rotation flowmeter is one of the main flow meter products in the world, widely used in petroleum, chemical.metallurgical and other industrial sectors and municipal construction, environmental protection projects. The flow ofmostliquids, gases and vapors is measured, tested and controlled.Products with the following different functions:
l. two-wire rotary flow transmiter: output 4-20mA current signal, while on-site display instantaneous flow, cumulativenow, signal frequency and output current value. lt has the function ofsmall flow cuting and fixed interference sienal eliminating
2. sub-body type: suitable for high temperature, high altitude and other harsh installation occasions.
3. diving type: suitable for easy to be immersed in the environment.
Installation requirements
Basic requirements for installation
1 . The flowmeter can be installed indoors or outdoors at an ambient temperature of -30°-+55 ° C
2. when the temperature ofthe measuring medium is higher than l50° C, the meter head can be mounted horizontally orvertically downwards (see Figure 1): Or sorting form (also suitable for high altitude, underground and other bad environment)(seeFigure 2), the maximum extension distanee is lO meters
3.When the measuring medium is liquid and the flow meter is installed in a vertical or inclined pipeline, the liquid fowdireetion should be from the bottom up (see Figure 3 )
4. In order to facilitate debugging, disassembly and on-site maintenance ofthe flow meter, the clear space above the meterhead is at least 0.5 meters (see Figure 4), if it cannot be guaranteed, the installation Angle should be adjusted during installation.5, The upstream ofthe flow meter should try to avoid the installation of regulating valves and semi-open valves, which canbe installed after $D downstream ofthe flow meter according to the process requirements (see Figure 5).
6. Signal transmission distance: the maximum transmission distance ofcurrent output signal is 800 meters.
7.lfthe precession flow meter is installed in a pipeline with large vibration, it is necessary to install a soft connection pipeor fix the pipe (see Figure 6).
8,.When measuring gas or steam, the precession flow meter should be installed in the high part ofthe pipeline to avoidcondensate in the low part. f the low part is installed at this time, the trap should be installed: When measuring liquid, theflowmeter should be installed at a low place in the pipeline to ensure full pipe measurement.
9.Reserve adequate front and rear straight pipe segments, For the reserved dimensions of straight pipe segments(see Figure 7).
Dnstrument nominal caliber, unit mm
