Food factory steam flow meter location if installed correctly

A, steam density compensation to superstition * in order to correctly measure the quality of the steam flow, must think about the changes of steam pressure and temperature, after suspension of steam flow totalizer. especially density compensation. Measurement of steam temperature of platinum resistance is bound to standard equipment: temperature platinum thermal resistance pull out pipe center position, platinum thermal resistance equipment at the 5 times the pipe diameter flowmeter downstream, equipment platinum thermal resistance of pipe position with heat preservation method, etc, to ensure that the measured temperature values *. Must pay attention to in the measurement of steam pressure, assume that choose lead pressure pipe pressure, it is necessary to suspend the zero migration ( Due to lead the pressure tube condensate gravity causes pressure transducer measurement between the pressure and the theory of present must difference, the negligence of density compensation) , also can be in inside flow totalizer. especially suspension modification. Pressure transmitter equipment in steam flowmeter dirty four times the pipe diameter, pressure transmitter, valve, gasket should be incomplete before dredging * to ensure that the steam pressure measurement. Assume that choose to suspend the set pressure and temperature compensation, set by numerical theory should try to come near, or a fault, the ordinary is not advocating a selection. In the flow totalizer. especially to correctly work appearance of the steam flowmeter, it is very important to the correct steam cost accounting. About the use of steam appearance owes a good understanding of discriminant, advocate use of intelligent flow totalizer. especially collaboration platinum resistance, pressure transmitter to suspend the temperature and pressure compensation, so that the steam mass flow rate measurement by * *. Second, the steam flowmeter downstream straight pipe on the right equipment on the traditional vortex flowmeter, straight pipe before and after the equipment request to identify five times to 20 times the pipe diameter and pipe diameter ( This is the back of the meter without obstacles such as valve craft request; There are obstacles to increase the straight pipe, detailed see the manufacturer to clarify book) 。 Assumptions on the downstream straight pipe, steam will make the pipe activity is not abundant, the velocity distribution profile distortion. Users will be able to pass in front of the steam flowmeter or increase the straight pipe equipment activity regulator to adjust the pipeline flow velocity spread, making the fluid of the steam flowmeter energetic appearance. About some of the large diameter steam flowmeter, gratified downstream straight pipe equipment on request is more important. Three, the steam flow meter range than the reasonable range than refers to a flow meter in can guarantee given * degree range, can measure the * the ratio of the large flow and * small flow. Amount of users, in accordance with the theory of I choose flowmeter, in practice for the steam flowmeter range to completely cover the use of the user. Beyond the flow limit and below the flow limit use constitutes a serious abstention from steam flowmeter measurement. For example: theory of average flow rate of 5 t/h steam flowmeter, vortex street ordinary should choose diameter is 150 mm of vortex street flowmeter, but when flow down to or exceed 15 t/h, will present serious flow metre phrase. Four, the existence of oscillation and electromagnetic interference should be avoided in steam metering * number of vortex flowmeter is affected by planning principle, flexibility of mechanical oscillation compare, measurement results are susceptible to interference oscillation, the section before and after the steam flow meter should be strong to support planning, equipped with oscillation buffer components, such as pipe oscillation is inevitable, should choose strong anti-interference ability must steam flowmeter ( Such as gas ultrasonic flowmeter, the intelligent type vortex flowmeters, differential pressure flowmeter, etc. ) 。 Assume the steam flowmeter oscillation interference, will use steam vortex street flowmeter in the onset of low frequency pulse signal, the steam flow meter will be these pulses as traffic signals, to flow totalizer. especially constitute the cumulative flow, provoked local vortex street in a period of time without steam steam flowmeter under the condition of still there will be a quantitative numerical accumulated. This is & other; Without the steam flowmeter go words throughout the &; The reason, thus steam users without steam conditions, also want to remember good table with steam supply unit, avoid steam flowmeter & other; Short run & throughout; 。 Five, the current in accordance with law, it is very important to test the measurement and GB17167 - 2006 'energy-using units power measuring appliance and equipped to handle general: understanding stated in force calibration of measuring equipment and dynamic measuring appliance should be current verification, whoever JingJian don't agree with the request of measuring instruments shall prohibit use. Necessary current steam flowmeter calibration, this is to ensure that the steam flow measurement right conditions. Therefore, broad users will use the steam flow meter every year to nonlocal statutory measurement techniques such as to suspend the metrological verification. Assume that the steam flowmeter calibration qualified, and the theory is thought & other; Banning of measurement & throughout; , then the user can correctly from the surface equipment, type selection, work surface profile Settings, interference and the theory of steam appearance changes can have a method for treatment of results.

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