Exclude medium containing impurities, having corrosive conditions. If you encounter a pump connected directly to the meter should be noted that the flow pump startup, pressure, whether full pipe, valve position, the valve is turned on and so on. 1 ,, when the pump instant start, instantaneous pressure and instantaneous flow will be too large, the valve located downstream of the meter, is turned on, liquid filled pipes, the direct impact of the impeller fluid movement is likely to cause damage. 2, when the pump instant start, instantaneous pressure and instantaneous flow rate becomes excessively large, the valve is located downstream of the meter, in the closed state, the liquid filled pipeline, if the pressure and flow instability at this time, open the valve, then the impeller will also have some impact, so long will affect the accuracy of, and in severe affect movement. 3, when the pump instant start, instantaneous pressure and instantaneous flow will be too large, the valve is located upstream of the flowmeter, is turned off, the pipeline is full pipe, when suddenly open the valve, liquid directly impact the movement is likely to cause damage to the impeller. 4, when the pump instant start, instantaneous pressure and instantaneous flow will be too large, the valve is located upstream of the flowmeter, is turned on, when suddenly open the valve, the liquid directly impact the movement is likely to cause damage to the impeller. Similarly to the case 1. 5, when the pump instant start, instantaneous pressure and instantaneous flow will be too large, the valve is located upstream of the flowmeter, is turned off, a non-full pipe in the pipe, when suddenly open the valve, liquid directly impact the impeller, impeller sudden force, is likely to damage caused by the movement. 6, when the pump instant start, instantaneous pressure and instantaneous flow will be too large, the valve is located upstream of the flowmeter, is turned on, the pipeline is non-full pipe, when suddenly open the valve, it will have a similar situation 5. 7, when the pump is turned off if there is reflow phenomenon will cause air, in which non-state in a closed tube filled pipes, the pump instant start, instantaneous pressure and instantaneous flow will be too large, a similar situation will also appear above the impeller impact. 8, no pipeline before installation purge impurities in the pipeline. LWGY liquid turbine flowmeter l Medium: Liquid l NA media: gas, steam clean l require media, install a filter l precision, generally up to ± 1% R, ± 0.5% R, high-precision up to ± 0.2% R l span a wide range: 1:10 or 1:20 l structure compact, lightweight, easy installation and maintenance, flow capacity l for high pressure measurement, the sensor meter body does not have to cut, easy to type instrument made of high pressure in the field l according to the actual needs of users online range Introduction liquid turbine flowmeter flow meter is learned at home and abroad advanced technology, optimized design, has a simple structure, lightweight, high accuracy, good repeatability, responsive, easy to install and maintain a new generation of turbines flowmeter. If the display instrument with special features, but also for quantitative control, excessive alarm, etc., is an ideal flow metering and energy meter. Technical Specifications Product Categories Product Image Instrument Type LWGY-A LWGY-B LWGY-C LWGY-D signal output pulse without 4-20mA / 4-20mA two-wire pulse power supply + 24VDC / + 12VDC lithium battery + 24VDC + 24VDC accuracy Level 1.0 to 0.5 1.0 to 0.5 1.0 to 0.5 1.0 to 0.5 standard scale measuring range standard range standard range (Extended Range) standard range monitor whether the communication interface No Yes No No No optional RS485 communication protocol None None Moubus HART instrumentation Material Stainless steel or PVC-free stainless steel or PVC or PVC or PVC proof grade stainless steel or non ExdIIBT4 ExiaIICT4 ExdIIBT4 or ExiaIICT4 ExdIIBT4 or ExiaIICT4 Protection class IP60 IP65 IP65 IP65 machine power <1W <1W <1W <1W meter diameter DN4 -DN200 DN4-DN200 DN4-DN200 DN4-DN200 medium temperature -20 ~ 120 ℃ -20 ~ 120 ℃ -20 ~ 120 ℃ -20 ~ 120 ℃ ambient temperature of -30 ~ 60 ℃ -30 ~ 60 ℃ -30 ~ 60 ℃ -30 ~ 60 ℃