译文：
一、产品概述 DFSG型水冷低噪声离心泵是在直联式管道泵基础上配套我公司开发的水冷式电机形成的新一代产品。它不但具有DFG型管道泵的运行平稳，结构简单、易维护保养、占地面积省等特点，且噪音更低。已获《实用新型专利证书》专利号：ZL02288276.6。该泵符合GB/T5657-1994《离心泵技术条件（Ⅲ）类》的标准。适用于输送清水或物理化学特性类似于清水的其他液体。 二、产品特点 1、高效节能：采用CFD计算流体动力学，分析计算出泵内压力分布和速度分布关系、优化泵的流道设计，确保泵有高效的水力形线，提高了泵的效率。 2、低噪声：由于采用水冷式电机，取消了电机顶端的风叶，DFSG泵比一般普通管道泵噪音低3～5%。 3、自冷结构：冷却水不仅可冷却电机外壳，而且可冷却电机上下轴承，既改善了轴承工作环境，提高了轴承寿命，也因电机冷却充分而提高了电机效率。 4、免维护结构：水冷电机轴承采用封闭式轴承，免除了轴承日常维护保养之忧。 5、使用寿命长：轴材料选用2Cr13马氏体不锈钢，避免了轴因锈蚀而引起的轴封失效或需要更换轴的顾虑。 6、可靠的寿命：机械密封基件一般选用橡胶波纹管结构，将传统机械密封中轴上密封由O形圈的线密封改为橡胶件的两道面密封，提高了密封效果。 7、户外使用：DFSG防护等级高，可用于户外。 三、工作条件 流量：2～1400 m3/h 扬程：5～80 m 介质温度：＜+80℃ 环境温度：≤+40℃

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原文：
1, Product Overview DFSG-type water-cooled low-noise direct-coupled centrifugal pump is based on the complete pipeline pump developed by our company formed a new generation of water-cooled motor products. It not only has the DFG type pipeline pump run smooth, simple structure, easy maintenance, an area of provincial characteristics, and low noise. Has been "utility model patent certificate" patent number: ZL02288276.6. The pump line GB/T5657-1994 "centrifugal technical conditions (Ⅲ) class" standards. Applicable to transport water or physical and chemical properties similar to water and other liquids. Second, product characteristics 1, high efficiency: The CFD computational fluid dynamics analysis to calculate pump pressure and velocity distribution within the relationship, optimization of pump flow of the design to ensure a highly efficient water pump shaped line, to improve the efficiency of the pump. 2, low noise: Due to water-cooled motor, removed the top of the fan motor, DFSG pump pipeline pump noise than an ordinary low 3 to 5%. 3, since the cold structure: cooling water cooling motors not only housing, but also the upper and lower cooling motor bearings, bearing not only improve the work environment, improved bearing life, but also because of the full and improved motor cooling motor efficiency. 4, Maintenance-free structure: Water-cooled motor with sealed bearings bearings, eliminating routine maintenance, bearing in fear. 5, long service life: 2Cr13 martensitic stainless steel shaft material selection to avoid the shaft due to corrosion caused by failure or the need to replace the shaft seal concerns. 6, reliable life: mechanical seal generally use rubber-based parts bellows structure, the traditional mechanical seal shaft sealing by the O-ring sealing to the two side rubber seal, improved sealing effect. 7, outdoor use: DFSG high degree of protection that can be used outdoors. Third, working conditions Flow: 2 ~ 1400 m3 / h Head: 5 ~ 80 m Media temperature: <+80 ℃ Temperature: ≤ +40 ℃