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NW Series Low Pressure Heater Drainage Pump is used for conveying the water in low pressure heater for power station,which medium temperature≤120C. This series of pumps has good cavitation performance and is suitable for low NPSHr working conditions.
High-efficiency,Energy-saving
Low Pressure Heater Drain Water Pump for 1000MW Thermal Power Plant
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Understanding the NW Series Low Pressure Heater Drainage Pump
The NW Series Low Pressure Heater Drainage Pump is a high-performance fluid transfer equipment independently developed by SHANGHAI PUMP MANUFACTURE CO.,LTD. (SPMC). Designed specifically for power generation scenarios, it focuses on solving the efficient and stable transportation of water in low-pressure heaters, becoming a core supporting component for thermal power plants, especially 1000MW thermal power plants. With its outstanding cavitation resistance and adaptability to harsh working conditions, this pump has become the preferred choice for power plant fluid systems pursuing energy saving and reliability.
Specifications | Range |
Capacity | 28.5-205 m³/h |
Head | 122-350 m |
Power | 30-315 kw |
Caliber (Sizes) | 80-250 mm |
Speed | 1450-2980 r/min |
Maximum Medium Temperature | ≤120°C |
Suction Diameter | Up to 250 mm |
Stage Configuration | Single stage (44m head) / 6 stages optional |
Installation Type | Horizontal |
Adopting optimized hydraulic design and precision manufacturing technology, the NW Series achieves remarkable energy-saving effects. Compared with conventional pumps, it reduces energy consumption by 15%-20% under the same working conditions, helping power plants lower operating costs while complying with environmental protection and energy-saving policies. The high-efficiency advantage is fully verified in long-term operation of large thermal power plants.
Equipped with an advanced impeller structure and flow channel design, the pump boasts excellent cavitation resistance, making it perfectly suitable for low NPSHr working conditions. Even in scenarios with insufficient inlet pressure, it can operate stably without cavitation damage, greatly extending the service life of key components and reducing maintenance frequency.
The rational structure design (horizontal layout, rigid shaft connection, and precision bearing configuration) ensures minimal vibration and low noise during operation. The pump can maintain continuous and stable operation for long periods under full-load conditions, with an average trouble-free working time exceeding 8000 hours, effectively guaranteeing the continuous operation of the power plant's production line.
With a power range of 30-315 kw and a maximum head of 350 m, the NW Series delivers robust power to meet the high-lift and large-flow requirements of low-pressure heater drainage in large-scale thermal power plants. The variable speed design (1450-2980 r/min) allows flexible adjustment according to actual working conditions, enhancing operational flexibility.
Beyond 1000MW thermal power plants, the pump is also applicable to medium and small thermal power plants, industrial boilers, and other scenarios requiring low-pressure heater drainage. Its caliber range of 80-250 mm and adjustable stage configuration enable it to adapt to diverse system requirements, reflecting strong versatility.
The NW Series Low Pressure Heater Drainage Pump is mainly used for conveying condensed water and drainage in low-pressure heaters of thermal power plants. Its typical application scenarios include:
Drainage transportation in low-pressure heater systems of 1000MW and below thermal power plants;
Fluid circulation in industrial boiler low-pressure heating systems;
Low-pressure drainage transfer in energy-saving renovation projects of power plants;
Other industrial fields requiring stable transportation of low-temperature (≤120°C) low-pressure fluid with strict cavitation resistance requirements.
Installation Form: Horizontal layout, which facilitates maintenance and reduces floor space, adapting to the compact layout requirements of power plant equipment rooms.
Stage Configuration: Single-stage (44m head) or 6-stage design optional, matching different head requirements of power plant systems.
Suction Structure: Large-diameter suction port (up to 250 mm) reduces inlet flow resistance and improves cavitation performance.
The impeller and flow channel are made of high-quality wear-resistant and corrosion-resistant materials, adapting to the long-term working environment of power plant drainage.
The shaft seal adopts advanced mechanical seal technology, ensuring leak-proof performance and extending service life.
The motor is matched with high-efficiency energy-saving models, achieving overall energy efficiency optimization of the pump unit.
It is specifically designed for low NPSHr working conditions and is suitable for conveying low-temperature (≤120°C) fluid in low-pressure heater systems. It is ideal for thermal power plants and industrial boiler systems requiring stable, efficient, and energy-saving drainage transportation.
Through optimized hydraulic design, high-precision component processing, and matching high-efficiency motors, the pump achieves high hydraulic efficiency. At the same time, the variable speed range (1450-2980 r/min) allows it to operate at the optimal efficiency point under different working conditions, minimizing energy waste.
The pump adopts a special impeller inlet design and enlarged flow channel cross-section, which reduces the flow velocity at the impeller inlet and lowers the vaporization pressure. This design effectively improves cavitation resistance, enabling stable operation even in low inlet pressure environments, and avoiding component damage caused by cavitation.
The horizontal structure design simplifies installation and disassembly. Key components such as the mechanical seal and bearing are designed with standardization and modularization, making replacement quick and convenient. In addition, the manufacturer provides professional technical support and after-sales service to ensure efficient maintenance.
