产品详细说明：格兰富（Grundfos）Grundfos NBG50-32-125/130卧式单级端吸离心泵

一、产品概述

格兰富NBG50-32-125/130是一款符合*** 2858***的非自吸式、单级端吸离心泵。该泵由格兰富（苏州）有限公司生产，采用卧式、吸吸、共振撤消的结构设计。

其最核心的技术优势在于后拉式维护设计（后拉式），在进行电机、泵头及叶轮的感维保护时，完全覆盖触动泵壳和进出口。该系列凭借其良好的水力性能和工业级耐用性，已成为京津地区换热站、商业空调系统及工业循环系统的设备。

二、核心技术参数表（工程选型参考）

三、技术优势与工业卖点

1. 后拉式维护（后拉式）结构：这是工业级离心泵的核心设计逻辑。维保人员可以在不感知泵壳和管道的情况下抽取转子组件。这不仅***缩短了系统的一段时间，更避免了因管道密封而导致的法兰密封风险，特别适合工业生产线的运行。

2. 符合*** 2858标准的通用性： NBG系列严格遵循***，这意味着其安装尺寸、性能范围具有***的对接性。在进行旧机房技术改造或备件替换时，能够实现与原有系统的无缝对接，降低工程成本。

3. 涂层涂层防护工艺：泵体表面经过***的涂层涂层处理，相比传统喷漆，其漆膜涂抹力更强，不仅外观整洁，更具备极高的抗氧化和耐化学腐蚀能力，确保在潮湿的泵房环境下长久不生锈。

4. ***的动平衡与低振动：叶轮与轴系经过严格的计算机动平衡校验。在京津冀地区的高端商业综合体和医院机房应用中，其运行产生的机械振动极低，能够有效避免通过管道向建筑内部输送结构噪音。

5. 轴承负载优化：通过优化的流道结构减少了水泵运行时的扭矩推力，从而降低了轴承的负荷，显着延长了机械密封和电机轴承的有效使用寿命。

四、典型应用场景

• 换热站补水循环：车辆北方城市集中供热系统中换热站的二次网补水及微循环。

• 暖通空调（HVAC）：商业综合体、数据中心、工厂办公楼的冷却水与冷冻水系统目标。

• 工业工艺循环：机械制造、电子工业安装的冷却液循环及工业清洗系统。

• 市政及建筑给排水：大型住宅区的供水系统，以及常规的管道工程。

五、工程师安装及运行建议

1. 基础支架：建议安装在钢筋混凝土基础上或减振钢槽架上。作为吸泵端部，确保吸气吸入的支撑独立于泵体，防止管道损坏损坏泵壳。

2. 气堵防护：吸入管道应设计有一定的斜度（形成指向泵吸入口递升），并使用偏心异径管，阻止导管中气袋，确保水泵启动即达到压力。

3. 冬季防冻：针对京津冀严寒地区，若安装于室外或非采暖机房，期间必须排除腔内余水，防止泵体冻裂。

I. Product Overview

Grundfos NBG50-32-125/130is a non-self-priming, single-stage end-suction centrifugal pump compliant with *** 2858 international standards. Manufactured by Grundfos (Suzhou) Co., Ltd., it features a horizontal, end-suction, back pull-out design.

Its core technical advantage lies in the back pull-out design, which allows maintenance of the motor, pump head and impeller without removing the pump casing or pipe connections. Thanks to its excellent hydraulic performance and industrial-grade durability, this series has become the preferred equipment for heat exchange stations, commercial HVAC systems and industrial circulation systems in the Beijing-Tianjin region.

Technical Advantages & Industrial Selling Points

• Back pull-out structureThis is the key design feature of industrial centrifugal pumps. Maintenance personnel can withdraw the rotating assembly without disturbing the pump casing or connected pipelines. This greatly shortens system downtime and avoids flange leakage risks caused by pipe disassembly, making it particularly suitable for continuous industrial production lines.

• *** 2858 standard compatibilityThe NBG series strictly adheres to international standards, ensuring excellent interchangeability in installation dimensions and performance ranges. It enables seamless connection with existing systems during pump room retrofits or spare parts replacement, reducing project costs.

• High-performance coating protectionThe pump casing is treated with an advanced protective coating. Compared with conventional paint, it offers stronger adhesion, a clean appearance, and superior oxidation and chemical corrosion resistance, ensuring long-term rust prevention in damp pump room environments.

• Excellent dynamic balance and low vibrationThe impeller and shaft assembly undergo strict computer dynamic balancing verification. When applied in high-end commercial complexes and hospital pump rooms in the Beijing-Tianjin-Hebei region, the pump produces extremely low mechanical vibration, effectively preventing structure-borne noise transmission through pipelines into buildings.

• Optimized bearing loadThe optimized hydraulic passage reduces axial and radial thrust during operation, lowering bearing loads and significantly extending the service life of the mechanical seal and motor bearings.