(空氣)進(jìn)口蒸汽減壓閥 主要技術(shù)參數(shù)及性能 Main technical parameters and performance

啟動(dòng)前正常的位置是主閥關(guān)閉，而導(dǎo)閥則由彈簧作用力打開.蒸汽由導(dǎo)閥經(jīng)壓力控制管進(jìn)入主閥隔膜室，部分蒸汽則由控制孔流向下游.施加在主閥隔膜上的控制壓力增大，打開主閥  RETZ The normal position before startup is that the main valve is closed, while the pilot valve is opened by the spring force. The steam enters the main valve diaphragm chamber through the pressure control pipe from the pilot valve, and part of the steam flows downstream through the control hole. The control pressure applied to the main valve diaphragm increases, and the main valve is opened

隨著蒸汽流過主閥.下游壓力上升，并由下游壓力感應(yīng)管反饋?zhàn)饔迷趯?dǎo)閥隔膜的下部（為了確保下游壓力的穩(wěn)定，應(yīng)安裝下游壓力感應(yīng)管），該作用力使導(dǎo)閥逐漸節(jié)流關(guān)小，與隔膜上部的彈簧作用力相平衡，從而維持主閥隔膜室內(nèi)的壓力，控制主閥的開度，輸送適量的蒸汽，維持下游穩(wěn)定的壓力.當(dāng)下游壓力上升時(shí)，反饋壓力增大，導(dǎo)閥關(guān)閉，主隔膜室的壓力從控制孔釋放，使主閥緊密關(guān)閉 RETZ As the steam flows through the main valve The downstream pressure rises and is fed back to the lower part of the diaphragm of the pilot valve by the downstream pressure sensing pipe (in order to ensure the stability of the downstream pressure, the downstream pressure sensing pipe shall be installed). This force causes the pilot valve to gradually throttle and close down, which is balanced with the spring force on the upper part of the diaphragm, so as to maintain the pressure in the diaphragm chamber of the main valve, control the opening of the main valve, deliver an appropriate amount of steam, and maintain the stable downstream pressure When the downstream pressure rises, the feedback pressure increases, the pilot valve closes, and the pressure of the main diaphragm chamber is released from the control hole to close the main valve tightly

下游任何的負(fù)載變化或壓力的波動(dòng)，都會(huì)反饋在導(dǎo)閥隔膜的下方，從而調(diào)節(jié)主閥的開度，確保下游壓力的準(zhǔn)確穩(wěn)定 Any load change or pressure fluctuation in the downstream will be fed back to the lower part of the pilot valve diaphragm, so as to adjust the opening of the main valve and ensure the accuracy and stability of the downstream pressure

螺紋連接: 1/2"-2"  BSP NPT

法蘭連接:  DN15-250 

執(zhí)行標(biāo)準(zhǔn):  BS16/25  GB16/25  DIN16/25  JIS16/25  ANSI 150

閥體承壓: PN16-40 

工作溫度: 蒸汽 285℃、空氣 120℃

壓力控制范圍 Pressure control range

0.2~3.0 bar g 黃色彈簧

2.5~7.0bar g 藍(lán)色彈簧

6.0~12.0barg 紅色彈簧

0.2~17barg 錐形彈簧

16.0~24.0 bar g 灰色彈簧

性能特點(diǎn)∶ Performance characteristics

無(wú)需外部動(dòng)力，減少安裝費(fèi)用 No external power is required to reduce installation costs

精確控制制程壓力，改善制程效率，提高產(chǎn)品質(zhì)量 Accurately control the process pressure, improve the process efficiency and improve the product quality

多種控制的組合，減少總的設(shè)備投資  Combination of multiple controls to reduce total equipment investment

本質(zhì)安全，可用于危險(xiǎn)區(qū)域  Intrinsically safe for use in hazardous areas

（空氣）進(jìn)口蒸汽減壓閥流量示意圖 Flow diagram

注: Notes

此流量表是以裝上外部感應(yīng)管為基準(zhǔn)的，如不裝外部感應(yīng)管，流量有所減小。在下游壓力很低的工況，流量減小可達(dá)30%This flow meter is based on the installation of external induction tube. If the external induction tube is not installed, the flow will be reduced. When the downstream pressure is very low, the flow can be reduced by up to 30%. How to use the chart to saturate the steam

飽和蒸汽  Saturated steam

例；蒸汽流量為600kg/h，壓力從6bar減至4bar。在表中找到上游壓力為6bar的曲線和下游壓力為4bar的交點(diǎn)，從該點(diǎn)垂直身下，找到所有系列口徑的容量。在該列中DN32的閥是能滿足要求的最小口徑閥 Example; The steam flow is 600kg / h and the pressure is reduced from 6bar to 4bar. In the table, find the intersection of the curve with the upstream pressure of 6 bar and the curve with the downstream pressure of 4 bar. From this point, find the capacity of all series of calibers. In this column, DN32 valve is the minimum diameter valve that can meet the requirements

過熱蒸汽 Superheated steam

由于過熱蒸汽比容較大，圖中給出的值應(yīng)乘以修正系數(shù)，若過熱度為55℃，則修正系數(shù)為0.95，若過熱度為100℃，修正系數(shù)為0.9，用于上述例子，若蒸汽過熱度為55℃，則DN32口徑的減壓閥流通能力為740X0.95=703kg/h，仍能滿足600kg/h的負(fù)載要求，則DN32 的閥仍適用 Since the specific capacity of superheated steam is large, the value given in the figure should be multiplied by the correction factor. If the superheat is 55 ℃, the correction factor is 0.95; if the superheat is 100 ℃, the correction factor is 0.9. For the above example, if the superheat is 55 ℃, the flow capacity of the DN32 pressure reducing valve is 740x0.95 = 703kg / h, which can still meet the load requirement of 600kg / h, then the DN32 valve is still applicable

故障排除 Troubleshooting

安裝示意圖 installation diagram

蒸汽減壓站 Steam decompression station

減壓站中的減壓閥應(yīng)根據(jù)管道上，下游壓力和蒸汽流量選擇口徑大小.一般減壓閥最少比上游管道小一個(gè)口徑，其它管道件如汽水分離器，過濾器，截止閥等應(yīng)與管道同口徑.如有需要，減壓站可安裝旁通閥以備緊急情況使用，旁路閥應(yīng)安裝在減壓閥上方與減壓閥同口徑  RETZ The diameter of the pressure reducing valve in the pressure reducing station shall be selected according to the upstream and downstream pressure and steam flow of the pipeline Generally, the pressure reducing valve shall be at least one caliber smaller than the upstream pipeline. Other pipeline parts, such as steam water separator, filter and stop valve, shall be of the same caliber as the pipeline If necessary, the pressure reducing station can be equipped with a bypass valve for emergency use. The bypass valve shall be installed above the pressure reducing valve with the same diameter as the pressure reducing valve

減壓閥串聯(lián) Pressure reducing valve in series

如果減壓比超過10∶1，應(yīng)使用2個(gè)減壓閥串聯(lián)以獲得準(zhǔn)確的壓力控制 If the pressure reducing ratio exceeds 10:1, 2 pressure reducing valves shall be used in series to obtain accurate pressure control

減壓閥并聯(lián) Pressure reducing valve (parallel)

減壓閥可從100%到0%調(diào)節(jié)負(fù)荷盡管如此，如果閥門要經(jīng)常工作在小負(fù)荷工況時(shí)，最好用2個(gè)較小的減壓閥并聯(lián)，如果小負(fù)荷小于最大負(fù)荷的10%則最好選用2臺(tái)減壓閥并聯(lián)  The pressure reducing valve can adjust the load from 100% to 0%. However, if the valve is to work under small load, it is better to use two smaller pressure reducing valves in parallel. If the small load is less than 10% of the maximum load, it is better to use two pressure reducing valves in parallel

并聯(lián)減壓站還用于關(guān)鍵的，不可中斷供汽的應(yīng)用 Parallel pressure reducing stations are also used for critical, uninterrupted steam supply applications