Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    Boiler Pressure Testing Pump

    Publication Date:

    2025-09-05

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    Boiler Pressure Testing Pump It is the ideal equipment for hydrostatic testing of boiler feedwater pump rooms and for generating high-pressure liquids in laboratories, suitable for conveying clean water or non-corrosive liquids with physical and chemical properties similar to water, provided the medium temperature remains below 280°C.

    Boiler pressure test pump model:

    I. DG-Type Boiler Feedwater Pressure Pump:

    DG Series Boiler Feedwater Pressure Pump This is a single-suction, single-casing multistage sectional centrifugal pump that incorporates a hydraulic model recommended by the national standards for highly efficient and energy-saving products. Featuring high efficiency and a broad performance range, it better meets the needs of users. The boiler pressure testing pump in this series is specifically designed as an efficient and energy-saving solution tailored for the new-generation industrial steam boilers undergoing upgrades or renovations. It is ideally suited not only for supplying feedwater to high-pressure boilers but also for applications requiring high-head water transportation in factories and urban areas. This particular pump model excels in industrial boiler systems, handling tasks such as water supply and drainage, as well as cooling water circulation. Additionally, by customizing materials, sealing configurations, and integrating advanced cooling systems, the pump can also be adapted for conveying hot water, petroleum products, and corrosive media. These pumps find extensive use across various industries, including petrochemicals, hot water circulation systems, environmental protection initiatives, and pure water distribution networks. Operating temperature range of the conveyed medium: -20°C to 105°C. The pump inlet pressure must not exceed 0.59 MPa (6 kgf/cm²).

    DG-Type High-Pressure Boiler Feed Pump

    ↑Click the image to learn about the DG model Boiler Pressure Testing Pump Product Details and Price Information ↑

    The main components of the DG-type boiler feedwater boosting pump include the shaft, shaft sleeve, suction section, impeller, sealing ring, middle section, discharge section, balance ring, balance disc, and tail cover. The suction section, middle section, discharge section, and tail cover are all made of cast iron, collectively forming the pump’s working chamber. The impeller is also crafted from cast iron and features blades inside; liquid enters axially from one side. Due to the unequal pressure acting on the front and back of the multi-stage pump impeller, an axial force is generated, which is counteracted by the balance disc. Each impeller undergoes a static balancing test during manufacturing. The shaft is made of high-quality carbon steel, with the impeller mounted in the middle and secured to the shaft using a key, shaft sleeve, and shaft sleeve nut. One end of the shaft is fitted with a coupling component, enabling direct connection to the motor. When viewed from the rotation direction, the pump shaft rotates clockwise. Both the pump’s suction and discharge ports are oriented vertically upward, while the rotor’s axial force is balanced by the balance disc. As for the shaft seal, it can either be a packing seal or a mechanical seal. Regarding rotor support, only the DG85-80, DG85-67, and DG155-67 models employ sliding bearings lubricated with thin oil; all other pump models utilize rolling bearings instead. High-pressure pumps are driven by electric motors via an elastic coupling. Alternatively, they can be equipped with gear couplings, diaphragm couplings, or hydraulic couplings according to customer requirements. Additionally, the prime mover can be a small steam turbine or an electric motor. When viewed from the drive direction, the pump rotates clockwise.

    II. DG(P)-Type Self-Balanced Multistage High-Pressure Boiler Feedwater Pressure Testing Pump:

    The DG(P)-type self-balancing multistage high-pressure boiler feedwater boosting pump is a single-suction, multistage, sectional-structure, self-balancing, horizontal multistage boiler feedwater pump. Developed over many years by our company based on our expertise in multistage centrifugal pumps, this self-balancing boiler feedwater pump represents an advanced, highly efficient, energy-saving, and long-lasting product tailored to meet users' specific needs. It incorporates advanced, energy-efficient hydraulic models sourced from overseas, fundamentally transforming the traditional design of boiler feedwater pumps that rely on balancing mechanisms. Notably, it eliminates the conventional axial force-balancing system and the balance disc assembly, thereby accelerating technological advancements in high-pressure boiler feedwater pump design. Manufactured in accordance with the API610 standard, this pump proudly holds a leading position in technology within the industry.

    DG(P)-Type Self-Balanced Multi-Stage High-Pressure Boiler Feedwater Pressure Testing Pump

    ↑Click the image to learn more DG(P)-Type Self-Balanced Multistage High-Pressure Boiler Feedwater Pressure Pump Product details and Price Information ↑

    The DG(P)-type self-balancing high-pressure boiler pressure-testing pump series boasts a wide efficiency range, extensive performance capabilities, excellent cavitation resistance, safe and smooth operation, low noise levels, and minimal wear parts. Additionally, these pumps are easy to install, maintain, and repair, significantly enhancing their reliability while drastically reducing users' maintenance costs—and ultimately lowering the overall operational expenses of the pump. This series of pumps is ideally suited for feedwater applications in medium- and low-pressure boilers, as well as for secondary-high-pressure boiler feed systems in thermal power plants. They are also perfectly tailored for high-lift water supply and drainage needs in industrial facilities and urban areas. These pumps can handle clean water or liquids with physical and chemical properties similar to water, with operating temperatures ranging from -20°C to 210°C. For even higher head requirements, they can achieve maximum lift heights of up to 1,800 meters.

    The DG(P)-type self-balancing high-pressure boiler feedwater boosting pump features an innovative design based on the conventional multistage centrifugal pump structure. It eliminates the axial force balancing mechanism typically found in multi-stage centrifugal pumps, making it an excellent replacement for D- and DG-type multistage centrifugal pumps that rely on balance discs or balance drums. Unlike conventional boiler feedwater pumps, this model does not include a balancing device in its rotor assembly. Instead, the self-balancing boiler feedwater pump employs a symmetrical arrangement of forward and reverse impellers, which inherently compensates for axial forces without the need for additional balancing components. By eliminating both the disc friction losses associated with balance discs and the recirculation losses caused by traditional balance mechanisms, this pump achieves a 5–14% improvement in efficiency compared to similar multi-stage pumps. Moreover, this design effectively prevents common failures—such as wear on the balance disc and its seat, or even rotor seizure—that often occur when the balancing system fails. As a result, the pump’s service life is significantly extended.

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