進口電動給水調(diào)節(jié)閥,(德國OLES奧萊斯閥門)
【進口電動給水調(diào)節(jié)閥】詳細說明:
調(diào)節(jié)閥又名控制閥,在工業(yè)自動化過程控制領(lǐng)域中愈诚,通過接受調(diào)節(jié)控制單元輸出的控制信號她按,借助動力操作去改變介質(zhì)流量、壓力炕柔、溫度酌泰、液位等工藝參數(shù)的終控制元件。一般由執(zhí)行機構(gòu)和閥門組成触法。如果按行程特點漂烂,調(diào)節(jié)閥可分為直行程和角行程;按其所配執(zhí)行機構(gòu)使用的動力展稼,按其功能和特性分為線性特性束多,等百分比特性及拋物線特性三種。調(diào)節(jié)閥適用于空氣俩堡、水拳股、蒸汽、各種腐蝕性介質(zhì)氏诽、泥漿事匈、油品等介質(zhì),調(diào)節(jié)閥常用分類:氣動調(diào)節(jié)閥壳凳,電動調(diào)節(jié)閥址敢,液動調(diào)節(jié)閥,自力式調(diào)節(jié)閥浆左。在現(xiàn)代化工廠的自動控制中挥闸,調(diào)節(jié)閥起著十分重要的作用,這些工廠的生產(chǎn)取決于流動著的介質(zhì)正確分配和控制伪节。這些控制無論是能量的交換光羞,壓力的降低或者是簡單的容器加料,都需要某些終控制元件去完成怀大。終控制元件可以認為是自動控制的‘體力’狞山。在調(diào)節(jié)器的低能量級和執(zhí)行流動流體控制所需的高能級功能之間全闷,終控制元件完成了必要的功率放大作用。 按用途和作用萍启、主要參數(shù)总珠、壓力、介質(zhì)工作溫度勘纯、特殊用途(即特殊局服、閥)、驅(qū)動能源驳遵、結(jié)構(gòu)等方式進行了分類淫奔,其中常用的分類是按結(jié)構(gòu)將調(diào)節(jié)閥分為九個大類,6種為直行程堤结,3種為角行程斜擎。
In the field of industrial automation process control, the control valve, also known as control valve, receives the control signal from the control unit and changes the final control elements of process parameters such as medium flow, pressure, temperature and liquid level by means of power operation. It is generally composed of actuators and valves. According to the stroke characteristics, the control valve can be divided into straight stroke and angular stroke; according to the power used by the actuator, according to its function and characteristics, it can be divided into three types: linear characteristic, equal percentage characteristic and parabolic characteristic. Regulating valves are suitable for air, water, steam, various corrosive media, mud, oil and other media. Regulating valves are commonly classified as pneumatic regulating valves, electric regulating valves, hydraulic regulating valves and self-operated regulating valves. Regulating valves play an important role in the automatic control of modern chemical plants. The production of these plants depends on the correct distribution and control of flowing media. These controls, whether energy exchange, pressure reduction or simple container feeding, require some final control elements to complete. The final control element can be regarded as the physical strength of automatic control. Between the low energy level of the regulator and the high energy level functions required to perform the flow fluid control, the necessary power amplification is finally achieved by the control element. According to the use and function, main parameters, pressure, medium working temperature, special use (i.e. special, special valve), driving energy, structure and so on, the most commonly used classification is to divide the control valve into nine categories according to its structure, six are straight stroke and three are angular stroke.
【進口電動給水調(diào)節(jié)閥】特性:
1、等百分比特性(對數(shù))
等百分比特性的相對行程和相對流量不成直線關(guān)系肢阿,在行程的每一點上單位行程變化所引起的流量的變化與此點的流量成正比宿闯,流量變化的百分比是相等的。所以它的優(yōu)點是流量小時甸赏,流量變化小危厕,流量大時,則流量變化大藏崇,也就是在不同開度上稻扔,具有相同的調(diào)節(jié)精度。
2短揉、線性特性(線性)
線性特性的相對行程和相對流量成直線關(guān)系伞下。單位行程的變化所引起的流量變化是不變的。流量大時刚肠,流量相對值變化小纳倚,流量小時,則流量相對值變化大谴垫。
3、拋物線特性
流量按行程的二方成比例變化母蛛,大體具有線性和等百分比特性的中間特性翩剪。 從上述三種特性的分析可以看出,就其調(diào)節(jié)性能上講彩郊,以等百分比特性*前弯,其調(diào)節(jié)穩(wěn)定,調(diào)節(jié)性能好秫逝。而拋物線特性又比線性特性的調(diào)節(jié)性能好恕出,可根據(jù)使用場合的要求不同询枚,挑選其中任何一種流量特性。
【進口電動給水調(diào)節(jié)閥】特點:
調(diào)節(jié)閥的流量特性浙巫,是在閥兩端壓差保持恒定的條件下金蜀,介質(zhì)流經(jīng)調(diào)節(jié)閥的相對流量與它的開度之間關(guān)系。調(diào)節(jié)閥用于調(diào)節(jié)介質(zhì)的流量的畴、壓力和液位渊抄。根據(jù)調(diào)節(jié)部位信號,自動控制閥門的開度丧裁,從而達到介質(zhì)流量禁妓、壓力和液位的調(diào)節(jié)。調(diào)節(jié)閥分電動調(diào)節(jié)閥央嘱、氣動調(diào)節(jié)閥和液動調(diào)節(jié)閥等唧痴。要介紹電動調(diào)節(jié)閥和氣動調(diào)節(jié)閥兩種。調(diào)節(jié)閥由電動執(zhí)行機構(gòu)或氣動執(zhí)行機構(gòu)和調(diào)節(jié)閥兩部分組成馏纱。調(diào)節(jié)并通常分為直通單座式和直通雙座式兩種噩五,后者具有流通能力大、不平衡辦小和操作穩(wěn)定的特點港驶,所以通常特別適用于大流量鳞乏、高壓降和泄漏少的場合。流通能力Cv是選擇調(diào)節(jié)閥的主要參數(shù)之一滨靴,調(diào)節(jié)閥的流通能力的定義為:當調(diào)節(jié)閥全開時绝绊,閥兩端壓差為0.1MPa,流體密度為1g/cm3時巴疾,每小時流徑調(diào)節(jié)閥的流量數(shù)收斑,稱為流通能力,也稱流量系數(shù)玲躯,以Cv表示据德,單位為t/h,液體的Cv值按下式計算跷车。調(diào)節(jié)閥由電動執(zhí)行機構(gòu)或氣動執(zhí)行機構(gòu)和調(diào)節(jié)閥兩部分組成棘利。調(diào)節(jié)并通常分為直通單座式和直通雙座式兩種,后者具有流通能力大朽缴、不平衡辦小和操作穩(wěn)定的特點善玫,所以通常特別適用于大流量、高壓降和泄漏少的場合密强。