The installation of the differential pressure flow meter scale and put into operation

Abstract: the scale of the differential pressure type flowmeter installation and operation of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. In order to ensure that differential pressure flowmeter ( Orifice meter, V cone flowmeter, such as pig velocity-equalizing tube flowmeter flow meter, power meter, delta, flow meter, etc. ) Installation accuracy, reduce the measuring error, must according to the requirements of the into. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a differential pressure type flowmeter installation and operation of the article the details of the scale. In order to ensure that differential pressure flowmeter ( Orifice meter, V cone flowmeter, such as pig velocity-equalizing tube flowmeter flow meter, power meter, delta, flow meter, etc. ) Installation accuracy, reduce the measuring error, in addition to must be in accordance with the requirements of the design, processing and manufacturing, and instrument selection, also must carry out the correct installation and use. Kyokuto by the flow meter manufacturer under the instrument and meter plant and technical personnel for you briefly summarized as follows: 1, the installation of the throttle device throttling method is used to measure flow, requirement of the front and back of the throttle device measured medium must maintain steady flow state. Therefore, make sure keep enough straight pipe before and after the throttle device, in the vicinity of the throttle device are not allowed to install sampling temperature measurement components or open mouth, does not allow such as elbow, bifurcate, rendezvous, gate resistance; Throttle installation direction should make the throttling parts showing a marked & other; Ten & throughout; The side of the inverse flow to place; Of throttle opening should be concentric to the pipe axis, the throttle device of end face and the axis of the pipe should be vertical; Must be full of the throttle device of the pipe, fluid pipe and single phase flow; Absolutely forbidden during the installation process will make impurities into the pipeline orifice clogging. 2, the pipeline installation guide pipe should be laying on the zui short path length zui to 16 m or less. Guide the inner diameter of the pipe should be according to the nature of the flow volume and pressure pipe of length factors such as comprehensive consideration, usually between 6 ~ 25 mm. Between two guide pipe should be close to, under the same intensity, lest bring density changes caused by different temperature measurement error. Guide pipe should be vertical or inclined, laying the slope is not less than 2 to 1. General Settings for fixed throttling pressure mouth pieces of the flange, ring chamber or clamping ring, the opening direction should guarantee the current body to prevent gas from entering the guide when liquid pressure tube, be for gas to prevent the water flow into the catheter and stolen goods. When measuring steam, should be in the pipeline with condenser, to make the steam condensation under test, and makes positive and negative pressure pipe guide of condensing liquid level have the same height and constant. When the flow is corrosive, easy to freeze, easy to precipitate solid content and viscosity is high, should use isolator and spacer, prevent directly with the measured medium contact or differential pressure transmitter, differential pressure type flowmeter performance instrument. Spacer should rotate to the high boiling point and low solidifying point, stable physical and chemical properties of the liquid. 3, the installation of the flowmeter flowmeter installation to ensure that the first installation of environmental conditions and the requirements of the design conditions of differential pressure type flowmeter had no obvious difference. Specific installation position according to the scene, should be as close to take pressure, in order to improve the response speed, and can be full of measured medium pressure piping. In order to ensure the safety of the differential pressure flowmeter, the guide pipe pressure and differential pressure type flowmeter to three valve should be installed before suite, can not only avoid the instantaneous overvoltage of the differential pressure meter, and, when necessary, to press the guide line and process, head of road cut off completely. ( 1) Measuring the liquid flow rate, pressure hole should be located in the lower half pipelines, generally with the horizontal line pipe center 45 & deg; Angle; The installation position of differential pressure flowmeter should choose in the lower part of the throttle device, guide zui after pressure tube from the mouth with good vertical downward extension, in order to bubble up. If restricted by field condition to differential pressure type flowmeter in the top of the throttle device, the pressure tube from the throttling device after the zui good straight down first, and then bent upward, to form a u-shaped liquid seal, and the installation of zui tube the high point of gas collector. ( 2) Measurement of steam flow, taking pressure hole should be located in the upper pipe, connecting pipe in near the throttling device install condenser, and the two condenser is located in the same horizontal plane. Already so can prevent the two guide condensate pressure tube height difference and change of measure error, and can avoid direct contact with the differential pressure flow meter high temperature steam. ( 3) When measuring gas flow rate, take pressure hole should be located in the upper pipe, generally with the vertical centerline 45 pipe & deg; Angle, the direction up; Differential pressure flowmeter should be installed above the throttle device, in case of mixed gas in the water into the pipe. If restricted by conditions have to differential pressure type flowmeter in the lower part of the throttle device, it must be in the pipeline zui lower furnish settler, so that the discharge condensate and impurities.

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