Turbine flow meter is a speed meter, it has high accuracy, good repeatability, no zero drift, high ratio, simple structure, few moving parts, high pressure resistance, wide measuring range, small size, light weight, low pressure loss Convenient maintenance and other advantages, turbine flowmeters have high-quality bearings and specially designed deflectors, which greatly reduce wear, are insensitive to peak values, and can provide reliable measurement variables under even harsh conditions. It has extensive use value in petroleum, chemical, metallurgy, food, biochemistry, city gas pipeline network and other industries. Choosing the right turbine flowmeter needs to consider the following five aspects in the selection process 1, according to the measurement purpose: Select whether to have instantaneous or cumulative flow (cumulative flow), flow display units, measurement accuracy, repeatability, linearity, flow range and range, measurement temperature, pressure loss, temperature and pressure compensation, output signal characteristics, and response time Wait. Different measurement objects have their own measurement purpose, and they have different focuses on the instrument performance. 2, measuring the nature of the media requirements: Chemical corrosion and fouling, fluid chemistry are sometimes the deciding factors in selecting measurement methods and instruments. Some fluids can cause contact with parts of the instrument to corrode. Surface fouling or precipitation of crystalline metal surfaces produces electrolytic chemistry. 3, measuring media group phase requirements: It should be treated with caution depending on whether the measurement medium is a single phase change medium or a multiphase and multicomponent flow measurement. Turbine flowmeter measures single clean medium, electromagnetic flowmeter can measure solid-liquid two-phase mixed medium. 4. Compression system and other parameters requirements: The measurement gas needs to know the compression factor value to obtain the fluid density under working conditions. The fluid with the fixed composition calculates the density through the pressure, temperature, and compressibility; the variable fluid and working near (or in) the supercritical area should consider the on-line density measurement. 5, measurement accuracy requirements: It is necessary to determine the overall measurement accuracy requirements and whether it is to be used at a specific flow rate or within a certain flow range due to changes in temperature and pressure. The value is generally low, and the difference between various gases is small. . The precision level of the intelligent liquid turbine flowmeter is commonly used in grades 1.0 and 0.5. This level of accuracy is higher than that of general rotor-type flowmeters. It is a good choice for customers with higher accuracy requirements. Use of liquid turbine flowmeters and requirements for the installation environment: The ideal measurement environment is a powerful guarantee for the normal operation of the flowmeter, but many times the complex environment at the site will also affect the accurate measurement of the turbine flowmeter. The flowmeter is divided into a speed flowmeter and a volumetric flowmeter according to different measurement principles. Different principles of measurement methods vary greatly in installation requirements. Velocity is generally required for the flowmeter to have a sufficiently long straight section to achieve full tube and steady flow rates. In general, positive displacement flowmeters, such as oval gear flowmeters, do not have excessive requirements for straight sections. The instrument instruction manual does not describe the instrument in detail, but should consider the installation position and flow direction, maintenance space, installation direction, and other requirements and their effects. 1, security Safety is the first factor to be considered in the selection of flowmeters, such as explosion-proof performance, application in explosive hazardous environments, selection of instruments according to their suitability for atmosphere, classification of explosive mixture classification, type of protective electrical equipment, and other safety rules or standards. 2, pressure strength: It is required that the housing of the turbine flow meter should be able to withstand a test pressure strength of 1.5 times the maximum working pressure for 5 minutes without breaking or leaking. 3, the ambient temperature Turbine flow meter instrument electronics and some meter flow detection sections are subject to environmental temperature changes. 4, environmental humidity High humidity accelerates atmospheric and electrolytic corrosion and reduces electrical insulation. Low humidity can easily induce static electricity. Turbine flowmeters experience rapid changes in the ambient or medium temperature causing problems with humidity. The user should anticipate the range of possible changes and verify whether the selected instrument will cause problems during operation. 5, electrical interference Power cables, motors, and electrical switches all generate electromagnetic interference, which is a source of error. Therefore, care should be taken to prevent or reasonably ground or shield the source of interference. 6, pipeline vibration Some flow meters (such as vortex flowmeters and Coriolis mass flowmeters) are susceptible to vibration and should be designed with reliable support behind the label. Although the pulsation damper can eliminate the effects of the pump and compressor, it should be installed away from vibration or pulsation. 7. Upstream and downstream pipe sections and straight pipe requirements: Most velocity flowmeters, including turbine flowmeters, are more or less affected by the flow conditions of the inlet and must ensure a good distribution of flow rates. Pipeline arrangements introduce different types of flow disturbances, the most common of which are flow profile profile distortions and vortices. Vortex is generally caused by two or more space elbows. These effects can be improved by using straight sections with an appropriate length upstream or by installing rectifiers to ensure the stability of the flow rate in the measuring section and the state of full flow. 8, pipeline layout Some flowmeters are installed horizontally and vertically, which can make a difference in measurement performance. For example, the vertical downward flow of fluid with additional force on the instrument's rotating elements can significantly affect performance, linearity or reproducibility. The vertical installation of the ground flowmeter facilitates the measurement, such as the metal tube float flowmeter. The installation direction of the intelligent liquid turbine flowmeter is generally horizontal. Most of the installation directions of the instrument are specified by the manufacturer and should be observed. We make various kind of racks special for the transport and storage of the kayaks, canoes, SUP, etc. We have wall racks for kayaks, SUP and other boat. We have celing racks for SUP and kayak hoist for kayak and canoes. We also have roof racks for transport of kayaks or SUP by the car. Our racks are of good quality and being very popular all over the world. We do OEM for many customers. Kayak Rack,Kayak Roof Rack,Kayak Storage,Kayak Car Rack NINGBO MARINE OUTDOOR CO., LTD , http://www.marineoutdoors.com
September 08, 2019