译文：
5230系列多级旋转控制阀是浙江三方控制阀股份有限公司新推出的一种多级减压防空化高压差控制阀，该系列控制阀主要用于≤60万千瓦机组发电厂；控制锅炉主蒸汽和再热蒸汽的喷水减温水的流量；锅炉给水泵最小流量再循环系统；以及在石油、化工工业控制高压差液体的流量。 该产品的主要特点如下： ●该系列控制阀，阀内组件有多级节流口，将原集中在一个节流口上的高压降分散到多个节流口上，相当于多个低压降阀串联来承受高压降。 ●流体逐级降压，流体方向不断旋转，增加介质流阻，控制流体流速，防止气蚀破坏。{zd0}允许压降可达到25MPa。 ●大流量时6级节流，小流量时7级节流，减少流体冲刷磨蚀。 ●节流面与密封面分开，阀芯和阀座表面经硬化处理，硬度可达到HRC70以上。 ●阀芯表面及流通面没有大缺口，流体中含有2～4mm固体颗粒，阀内组件也不会卡住。 ●阀体组件与执行机构采用浮动连接，可xx阀杆与推杆不同轴造成憋劲现象。 ●在同一公称通径下，根据流量特性不同，设有3～4种KV值，流量特性有等百分比和线性特性，以满足用户选用。 ●阀前后压降ΔP与阀进口压力P1压降比可达到0.99。

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原文：
5230 Series multi-stage rotary control valve is a control valve Co., Ltd., Zhejiang three new air defense of a multi-level decompression and high-pressure differential control valves, control valves of the series is mainly used for ≤ 60 million KW power plant; control of boiler main steam and re-heat steam spray reduced the flow of warm water; boiler feed pump minimum flow recirculation system; as well as in petroleum, chemical industry, control the flow of fluid pressure differential. The main features of the product are as follows: ● The series of control valves, valve components of multiple-level throttling mouth, the original focus on a cutting port on a high-pressure drop across both port on the throttle, which is equivalent number of low-pressure valve in series to withstand high-pressure drop down. ● fluid level at blood pressure, fluid continuously rotating the direction of increasing medium flow resistance, control flow rate, preventing cavitation damage. The maximum allowable pressure drop up to 25MPa. ● Large flow 6 throttle, the small flow 7 to cut expenses, reduce fluid erosion erosion. ● cutting surface and the sealing surface separated by the valve core and valve seat surface hardening, the hardness can reach HRC70 or more. ● Plug the surface and liquid surface there are no major gaps, the fluid contains 2 ~ 4mm of solid particles, valve components will not be stuck. ● body components and implementing agencies floating connection, remove the stem and putting fresh choke phenomenon caused by the different axes. ● In the same nominal diameter, the flow characteristics according to different, with 3 ~ 4 kinds of KV values, there are equal percentage flow characteristics and linear features to meet the user selected. ● valve before and after the pressure drop ΔP and the pressure drop valve inlet pressure P1 can reach more than 0.99.
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