免费发布

进口调节阀如何选型

更新时间:2012-12-28 11:01:50 信息编号:76297
进口调节阀如何选型
供应商:
北京德泰科阀门有限公司 商铺
企业认证
所在地
北京大兴区大兴工业区
联系电话
010-59430603
联系人
黄先生
手机号
15910656008
访问统计
403次
让卖家联系我

详细

进口调节阀如何选型

选择进口调节阀时,首先要收集完整的工艺流体的物理特性参数与调节阀的工作条件,主要流体的成份、温度、密度、粘度、正常流量、最大流量、最小流量、最大流量与最小流量下的进出口压力、最大压差等。而在技术方面主要掌握和确定调节阀本身的结构、流量特性、额定流量系数Kv值、口径大小、工艺允许压差计算及执行机构的选择、材料和安装等方面的内容。
选择进口调节阀时一般应遵循的原则有如下几点。一、首先从动力源来选择,美国威盾VTON根据方便和反应速度的要求来选择用什么驱动方式的调节阀,主要有进口电动调节阀,进口气动调节阀,进口自力式调节阀。二调节阀的结构型式:应能满足介质温度、压力、流动性、流向、调节范围以及严密性的要求。按结构分类主要有进口单座调节阀,进口双座调节阀,进口套筒调节阀。三、调节阀的流量特性:应能满足系统特性进行合理的补偿。调节阀的流量特性是指介质流过阀的相对流量与阀杆相对位移间的关系,数学表达式如下:Q/Qmax=f(l/L),式中Q/Qmax为相对流量,为调节阀在某一开度时流量Q与全开流量Qmax之比;l/L为相对位移,调节阀在某一开度时阀芯位移l与全开位移L之比。选择的总体原则是调节阀的流量特性应与调节对象特性及调节器特性相反,这样可使调节系统的综合特性接近于线性。选择流量特性通常在工艺系统要求下进行,但是还要考虑下述实际情况。1、直线性流量特性适用范围:①差压变化小,几乎恒定;②工艺流程的主要参数的变化呈线性;③系统压力损失大部分分配在调节阀上(改变开度,阀上差压变化相对较小);④外部干扰小,给定值变化小,可调范围要求小。2、等百分比特性适用范围:①实际可调范围大;②开度变化,阀上差压变化相对较大;③管道系统压力损失大;④工艺系统负荷大幅度波动;⑤调节阀经常在小开度下运行。3、除了以上两种常用的流量特性之外,还有抛物线特性和快开特性等其他流量特性的调节阀。四调节阀的口径:应能满足工艺上对流量的要求。有进口大口径调节阀,进口小口径调节阀。根据已知的流体条件,计算出必要的Kv值,选取合适的调节阀口径。
Control valve selection and common sense Select the control valve, the first complete collection of the physical characteristics of the process fluid control valve parameters and operating conditions, the main fluid composition, temperature, density, viscosity, normal flow, maximum flow, minimum flow, maximum flow and minimum flow rate import and export pressure, maximum pressure and so on. In the technical aspects of the main control valve itself and determine the structure, flow characteristics, the rated flow coefficient Kv value, aperture size, technology allows the calculation of pressure and actuator selection, materials and installation aspects. Select the control valve when the general principles to be followed are the following. A valve structure type: should be able to meet the medium temperature, pressure, flow, flow, adjust the scope and rigor of the requirements. Two valve flow characteristics: the system should be able to meet the characteristics of reasonable compensation. Control valve flow characteristics is the medium flow through the valve stem relative to flow and the relationship between the relative displacement, mathematical expressions are as follows: Q / Qmax = f (l / L), where Q / Qmax for the relative flow rate, as adjusted When opening the valve at a flow rate Q and the ratio of full-flow Qmax; l / L for the relative displacement of the valve when the valve opening in a displacement l and the ratio of full-shift L. The overall principle is the selection control valve regulating the flow characteristics should be the object characteristics and regulator features the contrary, it will give a comprehensive control system features close to linear. Select the flow characteristics in the process is usually carried out under the system requirements, but also consider the following facts. 1, the linear flow characteristics of the scope of application: ① pressure change is small, almost constant; ② The main process parameter changes linearly; ③ loss of most of the distribution system pressure control valve on the (change in opening the valve on the pressure change is relatively small); ④ external interference, given the value of small changes, small adjustable range of requirements. 2, the percentage of properties such as the scope of application: ① actual adjustable range; ② opening change, relatively large changes in differential pressure valve; ③ large piping system pressure loss; ④ process system load fluctuations; ⑤ valve often in small opening run. 3, in addition to the above two common flow characteristics, there are parabolic features and other features quick opening flow characteristics of control valve. Three valve diameter: should be able to meet the technical requirements on the traffic. According to the known fluid conditions, necessary to calculate the Kv value, select the appropriate valve diameter.

关于北京德泰科阀门有限公司商铺首页 | 更多产品 | 更多新闻 | 联系方式 | 黄页介绍
主要经营:进口调节阀,进口自力式调节阀,进口减压阀,阻火器,进口截止阀,进口蝶阀,进口高压小型球阀,进口蒸汽阀门,进口燃气阀门,进口不锈钢阀门,进口美标阀门,进口低温阀门,进口真空阀门,进口卫生级阀门,进口球阀

 

北京德泰科流体设备公司代理有:进口调节阀,进口自力式调节阀,进口减压阀,阻火器,进口截止阀,进口蝶阀,进口高压小型球阀,进口蒸汽阀门,进口燃气阀门,进口不锈钢阀门,进口美标阀门,进口低温阀门,进口真空阀门,进口卫生级阀门,进口球阀,进口蝶阀,进口止回阀,进口过滤器,进口电磁阀,进口高压电磁阀,进口卫生级阀门,美国威盾vton进口阀门、德国top(托普)阀门、日本阀天venn阀门。 进口调节阀-北京德泰科流体设备公司,总部位于首都北京,销售及技术服务于阀门行业的流体控制企业,其产品和服务在化工、石化、石油、造纸、采矿、电力、液化气、食品、制药、给排水等领域市场处于 ...
内容声明:顺企网为第三方交易平台及互联网信息服务提供者,顺企网所展示的信息内容系由北京德泰科阀门有限公司经营者发布,其真实性、准确性和合法性均由店铺经营者负责。顺企网提醒您购买前注意谨慎核实,如您对信息有任何疑问的,请在购买前通过电话与商家沟通确认顺企网存在海量企业商铺和供求信息,如您发现店铺内有任何违法/侵权信息,请立即向顺企网举报并提供有效线索。
您可能喜欢
顺企网 | 公司 | 黄页 | 产品 | 采购 | 资讯 | 免费注册 轻松建站
免责声明:本站信息由企业注册和来自工商局网站, 本站完全免费,交易请核实资质,谨防诈骗,如有侵权请联系我们   法律声明  联系顺企网
ICP备案: 粤B2-20160116 / 粤ICP备12079258号 / 互联网药品信息服务资格证:(粤)-经营性-2016-0009 / 粤公网安备 44030702000007号
© 11467.com 顺企网版权所有 发布批发采购信息、查询企业黄页,上顺企网