The orifice meter scale error causes and solutions

Abstract: the reasons of the orifice meter scale error and solution information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Standard orifice flowmeter is currently in petroleum, chemical industry, metallurgy, electric power, heat supply, water supply and other fields for measuring gas, steam, liquid and the principal means of traffic. 1, the change of circulation area in the field use, orifice plate surface may be adhesive. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the cause of the orifice meter scale error and solution article details. Standard orifice flowmeter is currently in petroleum, chemical industry, metallurgy, electric power, heat supply, water supply and other fields for measuring gas, steam, liquid and the principal means of traffic. 1, the change of circulation area in the field use, orifice plate surface may be stuck in a layer of dirt or impurities, lead to circulation sectional area is smaller, measuring differential pressure will increase, to measure flow rate increased. Solution: check clean around the orifice plate, for cleaning. 2, transmitter drift if using for a long time, zero drift may occur in the transmitter, if it is a positive drift, according to the differential pressure will increase, according to traffic will increase. Solution: the transducer zero point calibration. 3, upstream and downstream straight pipe length is insufficient length of straight pipe upstream and downstream if, gas won't get full development, can cause larger error, the measurement results if there within the given straight pipe upstream single bend or planar double bend, will make the measurement results on the high side. Solution: steam pipe, the length of straight pipe upstream and downstream reach regulation requirement. Before the throttle device equipped with rectifier. 4, orifice plate thickness is not in conformity with the provisions in the standard orifice plate thickness should be between e hole orifice plate thickness and 0. Between the 5 d. If beyond this scope, will make the gas flow through the orifice resistance losses increase, the measuring value higher than the actual value. Solution: check the orifice plate thickness, if beyond this range, for replacement. 5, differential pressure transmitter three valve leak if three valve group of low-pressure valve leakage, will lead to measure differential pressure increases, will increase the measured results. Solution: if three valve group in the low pressure valve leakage, the valve to tighten and replaced when necessary. 6, isolation fluid level lead high pressure pipe from condensing tank to the differential pressure transmitter of the liquid level is medium to high temperature and differential pressure transmitter, protect the differential pressure transmitter. If low pressure measuring liquid level height is higher than the high pressure measuring liquid level height, will lead to measure differential pressure increases, measuring flow rate will increase. Solution: check whether the height of the high and low side condensing tank, if don't agree. Check the height of the condensate tank is higher than that of steam pipeline, if below pipe, the height of the condensing tank up. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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