The SLZ end suction, long coupled, single stage centrifugal chemical process pump stands as a beacon of engineering excellence, meticulously standardized to EN 22858 / ISO 2858. Crafted to conquer a myriad of challenges across industrial and marine landscapes, this versatile pump demonstrates unparalleled proficiency in handling low viscosity clean or marginally contaminated liquids, deftly avoiding solid or fibrous intrusions. It effortlessly navigates the pumping of diverse fluids such as fresh and sea water, alongside fuels like diesel, petrol, and kerosene. Its applications span a vast spectrum, including but not limited to, fuel transfer, chemical processes, energy facilities, mining, fire combating, irrigation, water provision, and treatment, as well as marine operations.
Introducing a formidable heavy-duty centrifugal chemical process pump, engineered to deliver exceptionally high flow and pressure capabilities, making it the powerhouse of choice for demanding industrial applications.
The long coupled centrifugal chemical process pump design brings forth a multitude of advantages, serving as a testament to innovative engineering.
The long coupled configuration triumphs in ease of maintenance, granting unobstructed access to the pump head without necessitating motor removal, thereby enhancing operational efficiency.
Engineered for endurance, this process pump boasts robust construction, fortified for continuous operation by integrating additional bearings in the pump head. These bearings significantly alleviate motor strain during prolonged performance, ensuring longevity and reliability.
The ingenious back pull out design facilitates the removal of the motor while preserving the pump's connection to the pipework, dramatically reducing downtime and expediting service and maintenance procedures.
The distinctive attribute of independent shafts for the centrifugal chemical process pump and motor means that in the unfortunate event of a shaft failure, only the pump shaft necessitates replacement. This stands in stark contrast to other less durable pumps that integrate the motor shaft, often resulting in the need for complete motor replacement upon shaft failure.
The long coupled design strategically situates a spacious gap between the pump and motor, providing an added layer of protection for the motor against fluid ingress, particularly in the event of a seal failure.
Product Summary
• Capable of pumping an extensive array of clean, low viscosity, or slightly contaminated fluids with remarkable efficiency.
• Available with both closed and semi-open impeller options to meet diverse operational needs.
• Back pull out design engineered to ensure swift and effortless maintenance, minimizing downtime.
• Capable of handling fluid temperatures up to a maximum of 175°C, ensuring versatility in challenging conditions.
• Heavy-duty shaft meticulously crafted to avoid contact with the fluid, thereby enhancing durability.
• Optional external seal cooling system available to optimize operational performance.
• Features independent pump and motor shafts, designed for easy maintenance and reduced replacement costs.
• Constructed from materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, offering a tailored approach to diverse environmental demands.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with additional options for steel and stainless steel casings to EN 1092-1 / PN 16 specifications.
• Diverse sealing options including gland packing, single, double, and cartridge mechanical seals to suit various application requirements.
• Equipped with three-phase 50hz / 60hz motors, with IP55 protection as standard, designed for robust, reliable performance.
• ATEX-certified versions available upon request, ensuring compliance with hazardous area requirements.
• Independent certification available upon request, underscoring the product's adherence to stringent industry standards.
• Manufactured in strict accordance with the EN 22858 / ISO 2858 standards, ensuring quality and reliability.
• Engineered for low NPSH requirements, enhancing operational efficiency.
• Assembly designed without the need for alignment, streamlining the installation process.
• All impellers balanced to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long coupled with a robust baseplate, ensuring stability and reliability in demanding environments.
• Options for installing an API Seal, conforming to API682 standards, available for enhanced fluid handling.
• Oil lubricated ball bearings, designed for smooth operation and reduced maintenance requirements.
| 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 |
Shanghai Semhai Pump Co., Ltd. takes pride in incorporating only the finest bearings, renowned across the industry for their exceptional durability, into our centrifugal and chemical pump products. Even when faced with the most challenging conditions, our pumps are designed for longevity, ensuring a lasting performance that sets them apart.
To expertly manage axial thrust, our premium pumps are equipped with wear rings strategically placed at both the front and back of most impellers. Additionally, a balance hole is ingeniously located on the back shroud of the impeller. For certain models where the axial thrust is minimal, these components are not necessary, illustrating our tailored engineering approach to efficiency and performance.
Our high-precision casting impellers are crafted with meticulous accuracy to guarantee optimal performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers exemplify resilience and reliability, ensuring that your pumping needs are met with unwavering excellence.
There are generally two main groups:
1) "Flush" - This method involves injecting clean, cool liquid into the seal chamber, creating an improved operational environment. A second, smaller port is intelligently designed, usually oriented downward, serving as an observation or vent opening for leakage. This thoughtful design ensures enhanced performance and reliability.
2) "Barrier or Buffer" used with dual seals - This innovative approach involves infusing a secondary fluid into the space between dual mechanical seals. It acts as a formidable barrier, preventing ambient air from contacting the pumped fluid. This not only amplifies seal cooling but also significantly boosts safety, embodying our commitment to superior engineering solutions.
It is noteworthy that not all mechanical seals necessitate these advanced external flush arrangements, providing flexibility and customization based on specific operational requirements.
Flexible couplings
In contrast to rigid couplings, flexible couplings are engineered to accommodate and absorb movements such as vibrations and thermal expansion, without sustaining damage. Ideal for applications with unavoidable misalignment between drive and pump shafts, these couplings excel at reducing excessive operating noise. Although their design is more complex and costly, the maintenance savings accrued over time, due to protection against shaft and bearing damage, make them a wise investment.
Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, ensuring compliance with industry-leading standards for peak performance and reliability.
These couplings boast lower reaction loads and superior balancing quality compared to standard couplings. This advancement translates to enhanced efficiency and effectiveness, optimizing the entire pump power transmission for robust performance.
| 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
Shanghai Semhai Pump Co., Ltd. takes pride in fostering enduring collaborations with a host of eminent domestic pump-testing powerhouses, ensuring premium quality and reliability for our Efficient Pull-Back Pump with External Cooling for Flood Situations. We have forged these strategic alliances with distinguished institutions, including:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City, renowned for its rigorous testing standards,
The highly respected Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, recognized for its cutting-edge evaluation methodologies,
The prestigious Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City, celebrated for its thorough assessment protocols,
And the acclaimed Shanghai Mechanical and Electrical Products Quality Inspection Center right here in Shanghai City, noted for its excellence in quality verification, amongst others.
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