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怎么正確選擇一個適合的進口閥門

怎么正確選擇一個適合的進口閥門

作者:admin????來源:????發布時間:2020-08-11 10:38????瀏覽量:
怎么正確選擇一個適合的進口閥門
How to choose a suitable import valve
 
本文結合獲得廣泛客戶好評的德國品牌德國洛克DE LOCKE,分析下進口閥門的具體選型:
In this paper, we analyzed the valve selection of Locke from Germany
 
一、進口閥門的特性有使用特性和結構特性
1、 The characteristics of the imported valve include service characteristics and structural characteristics
 
1、進口閥門使用特性:
    使用特性確定了閥門的主要使用性能和使用范圍,屬于閥門使用特性的有:閥門的類別(閉路閥門、調節閥門、安全閥門等);產品類型(閘閥、截止閥、蝶閥、球閥等);閥門主要零件(閥體、閥蓋、閥桿、閥瓣、密封面)的材料;閥門傳動方式等。
1. Service characteristics of imported valve:
 
The use characteristics determine the main performance and scope of use of the valve, which belong to the valve category (closed-circuit valve, regulating valve, safety valve, etc.); product type (gate valve, globe valve, butterfly valve, ball valve, etc.); material of main parts of valve (valve body, valve cover, stem, disc, sealing surface); valve transmission mode, etc.
 
2、結構特性:
    結構特性確定了閥門的安裝、維修、保養等方法的一些結構特性,屬于結構特性的有:閥門的結構長度和總體高度、與管道的連接形式(法蘭連接、螺紋連接、夾箍連接、外螺紋連接、焊接端連接等);密封面的形式(鑲圈、螺紋圈、堆焊、噴焊、閥體本體);閥桿結構形式(旋轉桿、升降桿)等。
2. Structural characteristics:
 
Structural characteristics determine some structural characteristics of valve installation, repair, maintenance and other methods. The structural characteristics include: the structural length and overall height of the valve, the connection form with the pipeline (flange connection, thread connection, clamp connection, external thread connection, welding end connection, etc.); the form of sealing surface (insert ring, threaded ring, surfacing, spray welding, valve body); valve body The structural form of the pole (rotating rod, lifting rod), etc.
 
二、選擇閥門的步驟
2、 To select a valve
 
1、明確閥門在設備或裝置中的用途,確定閥門的工作條件:適用的介質、工作壓力、工作溫度等等;比如想要選擇一款德國力特LIT的截止閥,確認介質是蒸汽,工作原理是1.3Mpa,工作溫度是200℃。
1. Make clear the use of the valve in the equipment or device, and determine the working conditions of the valve: applicable medium, working pressure, working temperature, etc.; for example, if you want to select a stop valve of German Lite, confirm that the medium is steam, the working principle is 1.3mpa, and the working temperature is 200 ℃.
 
2、確定與閥門連接管道的公稱通徑和連接方式:法蘭、螺紋、焊接等;比如選擇進口截止閥,確認連接方式是法蘭的。
2. Determine the nominal diameter and connection mode of the pipe connecting with the valve: flange, thread, welding, etc.; for example, select the inlet stop valve, and confirm that the connection mode is flange.
 
3、確定操作閥門的方式:手動、電動、電磁、氣動或液動、電液聯動等;比如選擇的是手動截止閥。
3. Determine the way to operate the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electro-hydraulic linkage, etc.; for example, the manual stop valve is selected.
 
4、根據管線輸送的介質、工作壓力、工作溫度確定所選閥門的殼體和內件的材料:鑄鋼、碳素鋼、不銹鋼、合金鋼、不銹耐酸鋼、灰鑄鐵、可鍛鑄鐵、球墨鑄鐵、銅合金等;比如截止閥選擇的鑄鋼材質。
4. According to the medium transported by the pipeline, working pressure and working temperature, determine the materials of the shell and internals of the selected valve: cast steel, carbon steel, stainless steel, alloy steel, stainless steel, acid resistant steel, gray cast iron, malleable iron, ductile iron, copper alloy, etc.; for example, the cast steel material selected for the stop valve.
 
5、選擇閥門的種類:閉路閥門、調節閥門、安全閥門等;
5. Select the type of valve: closed-circuit valve, regulating valve, safety valve, etc;
 
6、確定閥門的型式:閘閥、截止閥、球閥、蝶閥、節流閥、安全閥、減壓閥、蒸汽疏水閥等;
6. Determine the type of valve: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc;
 
7、確定閥門的參數:對于自動閥門,根據不同需要先確定允許流阻、排放能力、背壓等,再確定管道的公稱通徑和閥座孔的直徑;
7. Determine the valve parameters: for automatic valves, the allowable flow resistance, discharge capacity, back pressure, etc. should be determined first, and then the nominal diameter of the pipe and the diameter of the valve seat hole should be determined;
 
8、確定所選用閥門的幾何參數:結構長度、法蘭連接形式及尺寸、開啟和關閉后閥門高度方向的尺寸、連接的螺栓孔尺寸和數量、整個閥門外型尺寸等;
8. Determine the geometric parameters of the selected valve: structural length, flange connection form and size, size of valve height after opening and closing, size and number of bolt holes connected, and overall size of the valve;
 
9、利用現有的資料:閥門產品目錄、閥門產品樣本等選擇適當的閥門產品。
9. Use the existing information: Valve catalog, valve product samples, etc. to select the appropriate valve products.
 
三、選擇閥門的依據
3、 Basis for valve selection
 
1、所選用閥門的用途、使用工況條件和操縱控制方式;
1. The purpose, working condition and control mode of the selected valve;
 
(1)工作介質的性質:工作壓力、工作溫度、腐蝕性能,是否含有固體顆粒,介質是否有毒,是否是易燃、易爆介質,介質的黏度等;比如想選擇德國德國洛克DE LOCKE的進口電磁閥,介質和環境易燃、易爆,一般要選擇防爆電磁閥;再比如要選擇德國洛克DE LOCKE的球閥,介質含有固體顆粒,一般要選擇V型的硬密封球閥。
(1) The nature of the working medium: working pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic, whether it is flammable or explosive, and the viscosity of the medium; for example, if you want to select the imported solenoid valve of German rocke de lock, the medium and environment are flammable and explosive, explosion-proof solenoid valve should be selected; for example, Germany rock de lock should be selected Lock ball valve, medium contains solid particles, generally choose V-type hard seal ball valve.
 
(2)對閥門流體特性的要求:流阻、排放能力、流量特性、密封等級等;
(2) Requirements for valve fluid characteristics: flow resistance, discharge capacity, flow characteristics, sealing grade, etc;
 
(3)安裝尺寸和外形尺寸要求:公稱通徑、與管道的連接方式和連接尺寸、外形尺寸或重量限制等;
(3) Requirements for installation dimension and overall dimension: nominal diameter, connection mode and connection dimension with pipeline, boundary dimension or weight limit, etc;
 
 
2、對閥門產品的可靠性、使用壽命和電動裝置的防爆性能等的附加要求(在選定參數時應注意:如果閥門要用于控制目的,必須確定如下額外參數:操作方法、比較大和比較小流量要求、正常流動的壓力降、關閉時的壓力降、閥門的比較大和比較小進口壓力)。
2. Additional requirements for reliability, service life and explosion-proof performance of electric device of valve products (attention should be paid when selecting parameters: if the valve is to be used for control purpose, the following additional parameters must be determined: operation method, maximum and minimum flow requirements, pressure drop of normal flow, pressure drop when closing, maximum and minimum inlet pressure of valve).
 
3、根據上述選擇閥門的依據和步驟,合理、正確地選擇閥門時還必須對各種類型閥門的內部結構進行詳細了解,以便能對優先選用的閥門做出正確的抉擇。
3. According to the basis and steps of valve selection, it is necessary to understand the internal structure of various types of valves in order to make a correct choice for the preferred valve.
 
4、管道的比較終控制是閥門。閥門啟閉件控制著介質在管道內的流向方式,閥門流道的形狀使閥門具備一定的流量特性,在選擇管道系統zui適合安裝的閥門時必須考慮到這一點。
歸納總結,選型幾大要素:確定要選用什么功能的閥門,確認介質的溫度,壓力,確認閥門的流量以及需要的口徑,確認閥門的材質,操作方式;
4. The final control of the pipeline is the valve. The valve opening and closing parts control the flow direction of the medium in the pipeline. The shape of the valve flow path makes the valve have certain flow characteristics. This must be considered when selecting the valve suitable for installation in the pipeline system.
The main elements of model selection are as follows: determine the valve with what function to select, confirm the temperature and pressure of medium, confirm the flow rate and caliber of valve, confirm the material and operation mode of valve;
 
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