Embrace the future of fluid handling with the SLZ end suction, long coupled, single stage centrifugal chemical process pump. This remarkable piece of engineering adheres to the high standards of EN 22858 / ISO 2858, ensuring top-tier performance in both industrial and marine environments. Expertly crafted for versatility, it accommodates an extensive array of applications. Seamlessly pump low viscosity clean or mildly contaminated fluids, free from troublesome solid or fibrous intrusions. From fresh water to sea water, and an array of fuels such as diesel, petrol, and kerosene, this pump excels. Whether tasked with fuel transfer, chemical processes, power generation, mining, firefighting, irrigation, or water treatment, this pump delivers unwavering reliability. Its potential extends to pressurization, grey water management, dewatering, and marine applications, showcasing its adaptable nature and robust design.
Introducing a powerhouse in the world of centrifugal chemical process pumps—our large, heavy-duty model boasts superior high flow and pressure capabilities, ensuring it meets the demands of even the most challenging operations with ease and efficiency.
Discover the myriad advantages of our long coupled centrifugal chemical process pump design, engineered to deliver unparalleled performance and reliability in every use.
Experience the convenience of easy maintenance with the long coupled configuration, allowing access to the pump head without the need to dismantle the motor, ensuring a hassle-free service experience.
Built to withstand the rigors of continuous operation, this pump is the epitome of robust engineering. The installation of additional bearings in the pump head significantly alleviates the strain on the motor, ensuring longevity and consistent performance.
Our innovative back pull out design revolutionizes maintenance procedures—remove the motor while the pump remains securely connected to the pipework. This feature translates into significant time savings during servicing and maintenance routines.
With independent shafts for the pump and motor, only the pump shaft needs replacement in case of a break, offering an economical and efficient solution. Unlike other pumps reliant on the motor shaft, which necessitate full motor replacement, we ensure greater durability and cost-effectiveness.
The ingenious long coupled design maintains a protective distance between the pump and motor, safeguarding the motor from fluid ingress during seal failures, thereby enhancing overall system protection and reliability.
Product Summary
• Effortlessly pumps a diverse range of clean, low viscosity or slightly contaminated fluids, catering to varying industrial needs.
• Choose between closed or semi-open impellers to best suit your specific application requirements.
• Experience swift and straightforward maintenance with our back pull out design, minimizing downtime.
• Capable of handling maximum fluid temperatures of up to 175°C, ensuring performance under extreme conditions.
• Heavy-duty shaft designed to avoid contact with the fluid, enhancing durability and reliability.
• Opt for an external seal cooling system to further enhance operational efficiency and seal longevity.
• Benefit from independent pump and motor shafts, reducing replacement costs and downtime.
• Available in a variety of materials, including cast iron, 316 stainless steel, duplex stainless steel, and bronze, catering to specific project requirements.
• Suction and discharge flanges conform to EN 1092-2 / PN 16, with steel and stainless steel casings adhering to EN 1092-1 / PN 16.
• Choose from gland packing or single, double, and cartridge mechanical seal options to suit your sealing needs.
• Equipped with three-phase motors operating at 50Hz / 60Hz. IP55 motor protection is provided as standard.
• ATEX versions available upon request for environments requiring explosion-proof solutions.
• Independent certification is accessible upon request, ensuring compliance and quality assurance.
• Proudly manufactured in adherence to EN 22858 / ISO 2858 standards, guaranteeing quality and performance.
• Low NPSH (Net Positive Suction Head) design enhances performance in challenging suction conditions.
• Enjoy the convenience of assembly without alignment, streamlining installation processes.
• All impellers undergo precise balancing conforming to ISO 1940 class 6.3, ensuring smooth and stable operation.
• Long coupled with a sturdy baseplate for enhanced stability and performance.
• Option to install an API Seal according to API682, for advanced sealing solutions.
• Features oil-lubricated ball bearings, ensuring smooth operation and reduced maintenance needs.
| Pump Type |
Centrifugal |
| Max Flow Rate |
1500M³H |
| Max Head |
160M |
| Max Temp |
175°C |
| Max Viscosity |
200 cst |
| Max Solid Passage |
20mm |
| Self Priming |
N |
| Inlet/Outlet Sizes |
32mm to 250mm |
| Mechanical seal type |
Double mechanical seal, API plan |
| Pump Materials |
AISI304, AISI316, AISI316L, Bronze, Cast Iron, Cast Steel, Ductile Iron, Duplex, NiAl Bronze, Super Duplex |
At Shanghai Semhai Pump Co., Ltd., our commitment to quality is reflected in our use of renowned brand bearings within our centrifugal and chemical pump products. These bearings ensure an extended service life for our pumps, even in the most demanding and challenging environments, setting a new standard for durability and reliability.
To expertly balance axial thrust, our pumps are engineered with precision. They feature wear rings at both the front and back of the majority of impellers, along with a strategically placed balance hole on the back shroud of the impeller. In cases where the axial thrust is minimal, a back wear ring and balance hole are not required, showcasing our ability to tailor solutions to specific operational needs.
Our high-precision casting impellers are a pinnacle of engineering excellence, ensuring superior performance across all operations. Available in materials such as cast iron, stainless steel, and bronze, these impellers are designed to meet diverse industrial requirements with unmatched precision and durability.
Our advanced sealing systems are divided into two primary categories, each designed to optimize pump performance and longevity:
1) "Flush" - This method involves injecting a clean, cool liquid into the seal chamber to enhance the operating environment significantly. Additionally, a secondary, smaller port, typically oriented downward, serves as an observation point for leakage or as a vent opening, ensuring optimal performance.
2) "Barrier or Buffer" with dual seals - In this configuration, a secondary fluid is introduced between two mechanical seals. This arrangement prevents ambient air from contacting the pumped fluid, significantly enhances seal cooling, and elevates safety standards, making it ideal for sensitive applications.
It is important to note that not all mechanical seals necessitate special external flush arrangements, underscoring our adaptability to various operational conditions.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, offer unparalleled adaptability by accommodating movement such as vibrations and thermal expansion. They are the perfect choice for scenarios where inevitable misalignments occur between drive and pump shafts. Their ability to absorb vibrations reduces operating noise significantly while offering a more complex yet high-value design. Despite a higher initial cost, these couplings provide long-term maintenance savings by protecting the shaft and bearings from damage and premature wear.
Our Semhai API standard chemical pumps incorporate the API 671 Standard Disc Couplings, ensuring seamless integration and superior performance.
Designed for excellence, these couplings exhibit lower reaction loads and superior balancing quality compared to standard couplings. This results in enhanced efficiency and effectiveness for the entire pump power transmission, empowering your operations with state-of-the-art technology.
| Industry |
Services |
| Chemicals, dyes & intermediates |
Organic/inorganic chemicals |
| Oil extraction & waste oil refineries |
Hydrocarbons/Volatile liquids |
| Bulk drugs & Pharmaceuticals |
Dyes & Intermediates |
| Effluent treatment plants |
Water treatment & distribution system |
| Heating & air conditioning plants |
Thermic fluid/ hot oil |
| Cooling towers |
Corrosive/abbrasive liquids |
Professional Cooperation Agencies: Our strategic alliances with esteemed agencies redefine professionalism, guaranteeing that our credentials and products meet the highest standards in the industry.
This company has established long-term cooperative relationships with several prestigious domestic pump-testing institutions, ensuring that our products are rigorously tested and certified for quality and performance. Our partners include:
National Quality Supervision and Inspection Center of Industrial Pumps (Tiexi District, Shengyang City): A renowned authority in the field, ensuring our pumps meet stringent national quality benchmarks.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial (Zhenjiang City): An esteemed institution dedicated to the excellence of irrigation machinery, endorsing our products for their superior performance.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center (Chongqing City): A pivotal partner guaranteeing agricultural water pump quality, enhancing trust in our offerings.
Shanghai Mechanical and Electrical Products Quality Inspection Center (Shanghai City) and so on: A leading-edge establishment ensuring that our mechanical and electrical products surpass industry expectations.
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