sewage pump factory

    At Grundfos, we often say that the best sales are not achieved in meeting rooms, but accumulated through the daily operation of equipment. The experience of renovating a sewage treatment plant near the Songhua River in Harbin is the most vivid illustration of this statement. The story began in 2008. As a core environmental facility in Harbin Qunli New District (home to a national-level urban wetland park) and situated along the Songhua River, the sewage treatment plant bore significant environmental responsibilities. From the outset, the water utility company responsible for its construction and operation decided to install eight Grundfos submersible pumps in the intake pump house—the most complex operational area with the highest debris accumulation and corrosion risk.   A "Perfect Score" in 17 Years   Fast forward to 2025, when the wastewater treatment plant launched its 'Legacy Equipment Retrofit' initiative, the client conducted a comprehensive 'health check' on these aging systems. The data was not only impressive but also astonishing: This was a 17-year intensive operation—where the equipment was submerged 24/7 in complex, highly corrosive raw sewage, constantly subjected to fiber entanglement and debris impact. Yet among these 8 pumps, 5 had never undergone major overhauls, with their core hydraulic component—the impeller—replaced only once.       This chronicle of time objectively attests to Grundfos products' unparalleled reliability and durability, which has directly led customers to steadfastly choose the brand during subsequent upgrades.   Both "hold the line" and "charge forward"   The simple "trade-in" model is no longer sufficient to address Harbin's current urban scale. With the influx of population into the Qunli New District, the sewage treatment plant faces more complex challenges: not only does the daily inflow volume continue to rise, but the intake pump room must also undertake the function of flood prevention and rainwater regulation during the flood season. "The current requirements differ from those in 2008. We must ensure stable sewage pumping during normal operations and rapid drainage during heavy rainfall. The equipment must possess dual-purpose capabilities." — Engineer, Sewage Plant Equipment Department   To address this dual requirement of 'maintaining stability in daily operations while handling peak demands,' we opted for a forward-looking 'scalable upgrade' solution rather than a simplistic homologous replacement.     We have uniformly upgraded all new pumps to 200kW capacity. The upgraded pump units demonstrate exceptional operational adaptability, ensuring stable sewage discharge while effectively handling peak flow surges during extreme weather events. The Weight of Service: 17 Years of Invisible Protection   If product strength is the stepping stone, then 17 years of 'professional service' serves as the reassurance. In this project, our authorized service center has maintained uninterrupted service for the past seventeen to eighteen years. When reflecting on this journey, Mr.Fan, the head of the service center, remarked:   In our profession, serving water treatment plants, the phone must never be turned off. A customer's call is a command; no matter when it rings, we must immediately respond to the scene.  For over a decade, we've been on call for anything from minor component replacements to technical consultations. Our clients trust us not because of polished PPTs, but because we're there when they need us most. —General Manager of Fanlixin Grundfos Authorized Service Center   This '24/7 response, same-day delivery' service commitment assures customers that choosing Grundfos means choosing a permanent on-call team of engineers.   Implementation and Delivery:Zero Production Stoppage in Complex Environment   The 2025 on-site implementation was fraught with uncertainties. As a typical municipal renovation project involving multiple stakeholders, the timeline and installation method of equipment would depend on the progress of other sub-projects. Confronted with complex on-site coordination and the strict requirement that the water intake pump room must remain operational, our team developed a meticulous 'non-disruption renovation' plan: Seamless retrofitting: The new 200kW pump is engineered to seamlessly integrate with the existing guide rod system, significantly reducing civil engineering work and shortening single-unit operation time. Rotating shifts: Implementing a relay mode of 'dismantling, installing, and commissioning' to ensure uninterrupted operation of the wastewater treatment plant. On-site coordination: Our service team serves as 'on-site coordinators,' proactively liaising with clients, supervisors, and contractors to resolve any unexpected obstacles.     "The site is full of variables, so we need to keep a close eye on it. We'll break down the installation schedule day by day, assist the client in coordinating with the supervisor, and ensure these eight pumps are smoothly handed over this month." — Li Chao, Grundfos Sales Engineer   Seventeen years ago, our clients chose us because they trusted the Grundfos brand. Seventeen years later, they choose us again because they see the quality of Grundfos and experience our unwavering commitment. Through this upgrade, Grundfos not only delivered eight high-performance 200kW pumps to the sewage treatment plant, but also extended its 17-year commitment to safeguarding water safety in Harbin.

What are the advantages of each of the four main sewage pumps?   A sewage pump is a pump-motor integrated unit designed for underwater operation. Compared to conventional horizontal or vertical sewage pumps, it features a compact footprint, easy installation and maintenance, extended continuous operation time, and lighter rotating components with significantly longer service life. It eliminates cavitation damage and water intake issues, while delivering low vibration and noise levels, minimal motor temperature rise, and zero environmental pollution.       The following section details the advantages of the four major sewage pumps:   I. Advantages of Submersible Sewage Pump (1) The sewage pump operates with minimal vibration and noise, features slow motor temperature rise, and is environmentally friendly with zero pollution. (2) Extended continuous operation of sewage pumps: Submersible sewage pumps feature coaxial alignment between the sewage pump and motor, short shafts, and lightweight rotating components, resulting in significantly reduced bearing loads. Consequently, their service life far exceeds that of conventional sewage pumps. (3) Compact structure and small footprint: As submersible sewage pumps operate underwater, they can be directly installed in sewage tanks without the need for dedicated pump rooms to house the pumps and motors, thereby significantly reducing land and infrastructure costs. (4) No cavitation damage or water diversion issues exist. Particularly, the latter point provides significant convenience for operators. (5) Easy installation and maintenance: Compact submersible sewage pumps can be installed freely, while larger models typically feature automatic coupling devices for effortless installation, making both setup and upkeep remarkably convenient. The application scope of submersible sewage pumps is expanding, suitable for various industrial wastewater, domestic sewage, liquid feed, and construction site drainage. Consequently, submersible sewage pumps are receiving increasing attention from wastewater pump manufacturers and have gradually taken the lead in the wastewater industry.     II. Advantages of Automatic Mixing Sewage Pump (1) When the automatic mixing sewage pump operates, it automatically agitates the sediment at the bottom of the tank, completely preventing siltation of waste and eliminating the need for manual cleaning. (2) The unique impeller design is designed to cut and tear fibers and debris. (3) Adopting the external circulation cooling system, the sewage pump can operate at low water level, reducing the motor starting frequency and prolonging the motor life.   The automatic mixing sewage pump is based on the ordinary sewage pump, which adopts automatic mixing device. The device rotates with the motor shaft, produces strong mixing force, mixes the sediment in the sewage tank into the suspension, and sucks it into the pump and discharges it. It is an advanced and practical environmental protection product.     III. Advantages of Vertical Non-clogging Sewage Pump (1) Safe and reliable, reducing maintenance costs: The rotor components after balancing calibration and reasonable bearing arrangement effectively balance the radial and axial forces of the pump, ensuring long-term stable operation of the unit with minimal vibration and low noise. (2) Superior flow capacity: The smooth large flow channel and specialized impeller anti-clogging design ensure the pump operates efficiently without clogging. (3) Dual sealing and dual protection: The two-stage motor seal is configured in series, providing genuine dual protection to ensure motor safety.   Working Conditions of LW Vertical Sewage Pump Flow rate: 2～1500 m³/h Head range: 3 to 45 meters Rated speed n: 970～2900 r/min Medium temperature: -15℃ to +60℃ Medium density: ≤1.3×10³ kg/m³ Medium pH: 5–9 Maximum system working pressure: ≤0.6Mpa   GW pipeline pump; GW sewage pump GW pipeline sewage pump is a kind of high efficiency and energy saving sewage pump developed by using advanced technology at home and abroad. It is widely used in high-rise building, long distance pipeline pressurizing water or other media, and can also be used to transport sewage containing particle fiber. It is also suitable for use as drainage pump, filtration and flushing condensation circulation pump, etc. Vertical sewage pump, which can be moved or fixed, is suitable for construction, farmland drainage and irrigation, and enterprise sewage pumping. It is also suitable for sludge pump, pulp pump, irrigation, etc.       IV. Advantages of Self-priming Sewage Pump (1) Superior discharge capacity: The unique impeller anti-clogging design ensures the pump operates efficiently without clogging. (2) High efficiency and energy-saving: The system employs an advanced hydraulic model, achieving 3-5% higher efficiency than conventional self-priming pumps. (3) Superior self-priming capability: This pump achieves 1-meter higher self-priming height than standard models while requiring significantly less priming time. (4) The mechanical seal uses a new friction pair and is operated in the oil chamber for a long time. (5) Compact design with small footprint, quiet operation, and remarkable energy efficiency, featuring easy maintenance and user-friendly replacement. (6) The automatic control cabinet can automatically regulate the pump's overrunning and stopping based on required liquefaction changes, eliminating the need for dedicated monitoring and offering exceptional convenience. (7) It can be equipped with installation methods according to user needs, which greatly facilitates installation and maintenance, eliminating the need for personnel to enter the sewage pit. (8) When paired with an outdoor motor, the pump eliminates the need for a dedicated pump house, allowing direct outdoor installation and cost savings.   The self-priming non-clogging sewage pump is suitable for chemical, petroleum, pharmaceutical, mining, paper, fiber, pulp, textile, Food industry, power plant and municipal sewage engineering, public facilities sewage, river and pond aquaculture industry.