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  • 商品名称: DVS双壳体立式筒袋泵
  • 商品编号: 908
  • 上架时间: 2015-01-19
  • 浏览次数: 153

产品用途:

DVS立式多级泵是针对低吸入压力输送的工况条件下而设计的系列泵。

因为低NPSH的工况条件需要,所以选择立式结构,DVS系列泵可以输送清洁的或有微量颗粒、稍有污染的、低温的或高温的、化学中性或有腐蚀性的液体,如乙烯、液氮、冷凝液,油类等。

DVS系列泵主要用于以下领域:发电厂、石油化工、炼油厂、煤化工、低温项目、冷凝液传送、环保项目、供排水、水处理、海上石油平台,海水淡化等。

DVS系列泵针对不同的工况条件与需求采用各种不同的设计方案,确保高效稳定,安全可靠。

DVS系列泵主要应用在具有低NPSH的工况条件下。泵身插入在地面以下,泵的长度能够额外提升NPSH数值,用于防止在叶轮吸入部位产生气蚀对泵造成损坏。

该系列泵充分利用空间优势,安装仅需要较小空间,有利于设备管线在空间内的合理分布。

   DVS系列泵尤其适用于低温液化气泵送的场所,泵若安装在容器上或泵的入口与管道直接连接,可不装备外壳。为了使泵型的结构紧凑,用相关公式精确计算出泵所用的最小长度(最小级数),泵直接连接到进出口的管口上。

   该系列泵具有很高的使用性能,根据需求变换结构,在设计中突出了安装,冷却,有利维修等优势,用全面周密的设计思维以确保泵性能的安全、可靠,高效、环保。

结构特点:

DVS系列泵是立式、多级、径向剖分、径向导叶、节段式结构泵。依据API610《石油、重化学和天然气工业用离心泵》为标准进行设计制造,叶轮的型式为单吸径向式,首级叶轮通常为为吸入式叶轮。根据需求可以增设诱导轮。

DVS系列泵采用多点支撑结构,进行稀油润滑,同时配备各种辅助设施与监控设施为泵的安全运行提供良好保障。

根据工况条件需求,每种型号泵都配备了几组不同的先进水力模型与部件以供选择,具有高汽蚀性能,高效率,无水力径向力等优秀特点。

DVS系列泵的设计使其能够承受吸入压力,泵的安装深度和泵身的长度取决于NPSH的条件。

    泵用平衡鼓来平衡轴向力,平衡效果好,使轴承负载小,不受轴向位置影响。剩余轴向力由一对角接触轴承来承受,安全可靠。

    轴承安装在可便于拆卸维修的轴承箱体内,仅拆卸轴承箱体情况下即可更换密封装置。并采用先进的润滑方式,依靠一套旋转的独立的润滑装置实现油的循环。根据泵身的长度确定是否加设介质润滑的中间支撑轴承。

    DVS系列泵的密封系统是依据AP1682《离心泵及回转泵轴封系统》标准要求,严格执行。密封采用单端面机械密封或双端面机械密封,并加设必要的密封辅助管路系统。密封辅助管路系统的 位置可根据现场实际安装空间,采用最佳布局方式,为安装提供最大的便利。

性能范围 :

流量:   6~1600m3/h

扬程:   800m

压力:   10.0Mpa

温度:   -80~250℃

Applications

Series DVS of vertical multi-stage pumps are designed for conditions of low suction pressure duties.

The vertical structure is selected to meet low NPSH duty requirement. DVS series of pumps are suitable for handling liquids clean, or with little solids, or slightly contaminated, or low or high temperature, or chemical neutral or corrosive liquids like ethylene, liquid nitrogen, condensate, and oil etc.

Series DVS of pumps are mainly applied in fields of power plant, petrochemicals, oil refineries, coal chemical industries, low temperature duties, condensate transferring, environmental protection, water supply and drainage, water treatment, off-shore petroleum platform, sea water desalination etc.

Series DVS pumps are designed in each specific plans to meet different duties and demands, so as to ensure high efficiency, steady and reliable performance.

Series DVS of pumps are generally used for duties with low NPSH. The pump body is inserted below ground, so the pump length will provide extra NPSH value to avoid damage to the pump due to cavitation happened at impellor suction part.

The space advantage of small installation size of this series of pumps, provides reasonable arrangement for equipment pipe lines.

Series DVS of pumps are specially suitable for low temperature liquid gas transferring. The outer casing may not be needed if the pump is installed to the vessel, or pump suction is connected with pipe line directly. In order to have the pump structure tightly, we use minimum pump length (minimum stages) with accurate calculation, and connect pump to inlet and outlet pipe nozzles.

This series of pumps can be changed structure as per duty demands. The design has obvious advantages for installation, cooling and maintenance. So the overall and professional design principle ensured pumps reliable performance, energy saving and efficient for environmental protection.

 

Structure features

Series DVS of pumps are vertical multi-stage, radial split, sectional ring type with radial diffuser. The design and manufacturing is according to API610 edition “Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries”. The impellor is single suction radial type, with first impellor generally suction type. Inducer is available if necessary and required.

Series DVS of pumps have structure of multi-supporting points with thin oil lubrication. Auxiliary and monitoring facilities will guarantee safety operation for pumps.

In order to meet duty requirement, each type of pumps are matched with several different advanced hydraulic models and parts for option. Excellent features of low NPSH, high efficiency, no hydraulic radial force etc. is realized.

Series DVS of pumps are designed to bear the suction pressure. The pumps installation depth and pump length depends on NPSH condition.

The axial thrust is balanced through balancing drum. The clearance is automatically adjusted during operation to have satisfactory balancing effect. The residual axial thrust is born by a pair of angular contact bearing with safety and reliable operation.

The bearings are mounted in bearing housing easy for disassembling and maintenance. The seals can be replaced through disassembling the bearing housing only. The advanced oil lubrication is functioned by a rotating lubrication facility independently. The needs of liquid lubricated middle supporting bearings will be determined according to pump length.

The seals system of our DVS series of pumps are strictly confirmed to API682 Pumps-Shaft Sealing System for Centrifugal and Rotary Pumps. The shaft seal is adopted single face and double face with necessary auxiliary piping system for seals. The suction and discharge pipes may be located and arranged with other best type as per installation space, so as to facilitate convenient installation.

 

Performance range:

Capacity:     6~1600 m3/h  

Head:        ≤ 800 m

Pressure:      10.0MPa

Temperature:  -80~250℃

 

 

型号说明Description of pump type

40 DVS  180   L

 

 

水力模型代号hydraulic model code

叶轮名义直径Impeller nominal diametermm

系列代号    Series code

出口法兰直径Discharge nominal diametermm