1. What is the Submersible Dredge Pump?

The DMD series Submersible Dredge Pump is a robust submersible pump designed specifically for dredging operations. Its purpose is to transport underwater sand, slurry, sludge, gravel, or other sediments to a designated location. OCEAN Pump provides a range of durable submersible dredge pumps that are resistant to wear. These pumps feature large spherical passages capable of handling up to 60% solids.The DMD series submersible dredge pump can be driven either hydraulically or electrically, depending on the specific working conditions. It boasts excellent suction properties due to its ability to operate in highly mixed densities when fully submerged. Additionally, a variety of optional suction heads and accessories are available to accommodate different dredging requirements.Key features of the DMD series submersible dredge pump include its compact structure, allowing for easy installation and portability. It is equipped with high chrome wearing components, ensuring durability in challenging environments. The pump also incorporates a heavy-duty mechanical sealing system, an overload thermal protection system, and versatile accessories, making it adaptable for various dredging applications.

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Submersible Dredge Pump for sand dredging

2. Specifications of DMD Series Submersible Dredge Pump

NO.Pump TypeDISCH.
DIA
CAPHeadPowerRotation speedEffBiggest particles discontinuous pass through
(mm)(m³/h)(m)(kw)(r/min)(%)(mm)
1DMD150-22-2215015022229806032
2DMD200-15-2215020015229806045
3DMD300-20-3715030020379805828
4DMD150-24-4510015024459806165
5DMD250-35-5515025035559805336
6DMD280-20-55150280205598054110
7DMD300-30-5515030030559805536
8DMD600-15-5525060015559806232
9DMD400-25-7520040025759806229
10DMD500-25-9020050025909806525
11DMD800-25-110300800251109806650
12DMD1000-18-1103001000181109806850
13DMD780-26-110300780261109806850
14DMD800-35-132300800351329807042
15DMD1000-22-1323001000221329807150
16DMD1250-15-1323001250151329807056
17DMD1250-25-1603501250251609807056
18DMD1000-30-1603001000301609807053
19DMD1750-15-1853501750151859807056
20DMD1500-20-2003501500202009807156
21DMD2000-20-2004002000202009807256
22DMD670-42-2202006704222098066150
23DMD1250-35-2203501250352209807045
24DMD1000-50-2503001000502509806845
25DMD1500-35-2503501500352509807250
26DMD1750-30-2503501750302509807055
27DMD1500-40-2803501500402809807050
28DMD1750-40-3153501750403159807055
29DMD2000-35-3154002000353159807260

For more parameters, please cleck here DMS submersible slurry pump_TAIAN OCEAN PUMP

    3 What Are the Main Parameters of the Submersible Dredge Pump?

    The submersible dredge pump is a high-performance pump engineered to handle solid particles and slurry effectively. When choosing this pump, it is crucial to consider various operational parameters to ensure that the selected model aligns with the application’s requirements and delivers optimal performance. Here are several key parameters to consider:

    3.1 Submersible Dredge Pump’s Flow Rate

    The flow rate of a submersible dredge pump is a crucial parameter that quantifies the amount of liquid or slurry passing through the pump within a specific time frame. It is commonly measured in units such as cubic meters per hour (m³/h) or gallons per minute (GPM). This parameter directly impacts the pump’s capacity to handle materials and plays a significant role in assessing its operational effectiveness.

    In submersible dredge pump applications, the extracted materials often exhibit a high concentration as a result of direct contact with the suction inlet’s slurry. In certain instances, the concentration can reach as high as 50-60%. Acknowledging this characteristic, the technical team at OCEAN Pump is dedicated to providing customers with specialized flushing devices and agitation devices. These enhancements aim to achieve higher operational efficiency under comparable mixing flow conditions, ensuring stable pump operation and optimal performance.

    3.2 Submersible Dredge Pump’s Lift Head

    The head parameter of a pump is a vital performance indicator that represents the vertical or horizontal distance the pump can effectively overcome. It accurately reflects the maximum height to which the pump can lift slurry, solid particles, or the farthest distance it can push them. This parameter is typically measured in internationally recognized units such as meters (m) or feet (ft).

    When selecting the appropriate head, several essential factors need to be considered. Firstly, the conveyance distance plays a role, referring to the specific distance the pump needs to push the fluid or particulate matter. Secondly, the elevation is a consideration, determining whether the pump can lift the material to the desired vertical position. Lastly, pipeline losses must be taken into account, which encompass energy losses resulting from factors like friction and bends as the fluid flows through the pipeline.

    OCEAN Pump utilizes an advanced and professional calculation program capable of accurately evaluating pipeline losses and head parameters. This ensures that customers receive precise and reliable data support when selecting a pump, thereby guaranteeing optimal performance during actual operation.

    3.3 Efficiency of the Submersible Dredge Pump

    The efficiency of a pump refers to its ability to convert input power into output power effectively. In the case of submersible dredge pumps, this efficiency is typically expressed as a percentage. A high-efficiency submersible dredge pump efficiently utilizes energy, enabling the pumping of solid particles and slurry with reduced energy consumption. In comparison to horizontal slurry pumps, submersible dredge pumps generally exhibit higher levels of efficiency. This is primarily attributed to their submerged operation, where the pump’s inlet directly interacts with the slurry, eliminating cavitation allowances and associated energy losses. Under optimal working conditions, the efficiency of a submersible dredge pump can reach impressive levels ranging from 80% to 90%.

    3.4 Passing Solids Particle Size of the Submersible Dredge Pump

    Submersible dredge pumps, as specialized industrial equipment, are designed to handle solid particles within a specific range. This capability is directly influenced by the pump’s overall design and functional performance. The pump’s specifications typically include a maximum allowable size for solids particles, ensuring stability and reliability in practical applications.

    Traditional submersible dredge pumps have traditionally been limited to handling relatively smaller particle sizes, typically around 20mm. These pump models are commonly used for conveying fine sand or similar small-particle materials, and their impeller designs feature closed structures tailored to such materials’ characteristics.

    However, with advancements in technology and the expanding range of industrial applications, submersible dredge pumps are now being utilized in diverse areas such as water conservancy, ports, and underwater engineering. These new application scenarios demand pumps with larger passage diameters to accommodate materials with varying particle sizes.

    In response to this market demand, OCEAN Pump has undertaken bold innovations and improvements. We have designed submersible dredge pumps with semi-open impeller structures. This design ensures the pump’s flow rate and head while effectively accommodating larger-sized particles. Most pumps utilizing this design can successfully handle particles up to 60mm, significantly expanding the pump’s range and adaptability.

    To cater to specific customer needs, we have successfully combined the pump casing of a gravel pump with the motor of a submersible dredge pump. This groundbreaking achievement has resulted in a submersible dredge pump capable of handling particles up to 127mm. This innovative solution not only showcases OCEAN Pump’s strength in technological research and development but also provides robust support for the broader application of submersible dredge pumps.

    3.5 Submersion Depth of the Submersible Dredge Pump

    Submersible dredge pumps are designed to operate either fully or partially submerged in liquid or slurry. The submersion depth of the pump depends on the specific requirements of the project and the design characteristics of the pump body. It is crucial to select a submersible dredge pump that can operate stably within the specified submersion depth range.

    The standard submersible dredge pumps manufactured by OCEAN Pump are currently equipped with a cable length of 10 meters, ensuring normal operation within a depth range of 5 to 8 meters. If the operating environment requires a greater submersion depth, it can be achieved by appropriately extending the cable length.

    Submersible dredge pumps have significant advantages when it comes to extraction depth since their operating environment is primarily below the water surface. In OCEAN Pump’s previous service cases, we have successfully provided submersible dredge pumps suitable for extracting at a depth of 120 meters for clients in the Philippines. Our performance in these instances has garnered high recognition and praise from our customers.

    4. How to Select Submersible Dredge Pump

    4.1 Determining Project Parameters for a Submersible Dredge Pump

    In order to proceed with the project, it is essential to gather comprehensive information regarding the key parameters involved. One crucial parameter is the type of slurry being handled, whether it is sediment, slurry, wastewater, or any other type. Additionally, the desired flow rate of the slurry must be specified. We can provide both the required mixed flow rate data and the desired solids content data.

    4.2 Obtaining Performance Curves for the Submersible Dredge Pump

    Performance curves are graphical representations that illustrate the characteristics of a pump, particularly the relationship between flow rate and head. If you need to obtain relevant product documentation or laboratory test data, you can contact Lingda Kong, the sales representative of OCEAN Pump, at WhatsApp: +86 185 6229 3317 or email sales@slurrypumpdm.com for assistance. OCEAN Pump possesses a complete set of professional pump performance testing systems, ensuring that each pump undergoes rigorous testing before leaving the factory. They provide detailed performance curve graphs and certificates of factory acceptance, aligning the selected curve with the required pump type and operating conditions to guarantee optimal performance.

    4.3 Determining the Flow Rate of the Submersible Dredge Pump

    Based on the specified flow rate requirements for the project, it is crucial to accurately locate the corresponding data point on the performance curve graph. Flow rate is commonly measured as the volume passing through the pump body per unit of time, typically expressed in cubic meters per hour (m³/h) or gallons per minute (GPM). If you can provide a specific numerical value for the desired sand production rate, OCEAN Pump’s professional technical personnel can estimate the corresponding mixed flow rate based on this information.

    4.4 Determining the Head of the Submersible Dredge Pump

    To meet the pump head requirements of the project, it is necessary to provide key parameters such as the horizontal distance, vertical distance, and extraction depth for slurry transport. OCEAN Pump’s professional technical personnel will then utilize specialized software to accurately calculate the required head and locate the corresponding head point on the performance curve. This ensures the efficient and stable operation of the pumping system.

    4.5 Verification of Compatibility for the Submersible Dredge Pump

    Once the flow rate and head values are selected, it is important to verify their compatibility with the matching points on the performance curve. This step ensures that the selected flow rate and head values exist on the curve, guaranteeing that the pump can reliably deliver the expected performance under the designated operating conditions. OCEAN Pump’s technical team will accurately calculate the pump’s shaft power based on parameters such as flow rate, head, discharge distance, and efficiency. This information helps determine the required power range, and we are committed to recommending pump models with sufficient margin to ensure efficient and stable operation in practical applications.

    We trust that this guide has provided answers to some of the questions you may have had regarding pump selection. However, if you still have any uncertainties or specific inquiries, please feel free to submit your questions via the chatbox located in the upper right corner or call us at +86 18562293317. OCEAN Pump team is ready to assist you by providing parameter and sizing recommendations for a submersible dredge pump that is tailored to your specific industrial application. We are eager to offer further assistance and support.