The SLZ end suction, long-coupled, single-stage centrifugal chemical process pump exudes excellence by adhering to the stringent standards of EN 22858 / ISO 2858. Ideally suited for an expansive array of industrial and marine applications, this pump is the epitome of versatility. It masterfully handles low viscosity fluids, whether clean or slightly impaired by minor contaminants. Its prowess extends to efficiently pumping essential fluids such as fresh water, sea water, and various fuels, including diesel, petrol, and kerosene. The pump is indispensable in applications like fuel transfer, chemical processing, energy plants, mining operations, firefighting, irrigation, water supply, water treatment, pressurisation, grey water management, dewatering, and marine operations.
Introducing the robust and reliable large, heavy-duty centrifugal chemical process pump, engineered for superior performance with high flow and high-pressure capabilities.
Experience the unparalleled advantages of the long-coupled centrifugal chemical process pump design, engineered for optimal performance and efficiency.
Maintenance is a breeze with the long-coupled configuration, offering effortless access to the pump head without necessitating motor removal.
Exemplifying durability and resilience, this process pump is crafted for persistent operation. The integration of additional bearings within the pump head significantly reduces motor stress during use.
The innovative back pull-out design facilitates motor removal while keeping the pump connected to the pipework, enhancing time efficiency during service and maintenance.
With independent shafts for the pump and motor, replacing only the pump shaft is necessary in case of a breakage, contrasting with inferior chemical process pumps that require entire motor replacement.
The long-coupled design provides substantial spacing between the pump and motor, effectively shielding the motor from potential fluid ingress due to seal failure.
Product Summary
• Capable of pumping a vast array of clean, low viscosity, or slightly contaminated fluids with ease.
• Choose between closed or semi-open impeller designs, tailored to your needs.
• Back pull-out design ensures maintenance is quick and hassle-free.
• Operates efficiently with fluids at temperatures up to 175°C.
• Heavy-duty shaft crafted to remain untouched by the fluid it pumps.
• Features an optional external seal cooling system for enhanced operation.
• Independent shafts for pump and motor ensure easy replacement and durability.
• Available in a variety of materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and can be customized to meet specific requirements.
• Suction and discharge flanges are compliant with EN 1092-2 / PN 16, with EN 1092-1 / PN 16 available for steel and stainless steel casings.
• Offers gland packing or single, double, and cartridge mechanical seal options.
• Equipped with three-phase 50Hz / 60Hz motors, with IP55 protection as standard.
• ATEX-certified versions available upon request for specialized applications.
• Independent certification provided upon request, ensuring quality and compliance.
• Manufactured with precision in accordance with the EN 22858 / ISO 2858 standards.
• Designed for low Net Positive Suction Head (NPSH), enhancing operational efficiency.
• Facilitates assembly without the need for alignment, streamlining installation.
• Impellers are meticulously balanced in line with ISO 1940 class 6.3 standards.
• Long-coupled design with baseplate for robust and stable installation.
• Capability of API Seal installation in accordance with API682, for enhanced sealing solutions.
• Utilizes oil-lubricated ball bearings, ensuring smooth and long-lasting operation.
| 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 |
Our centrifugal and chemical pumps feature renowned brand bearings, promising durability and exceptional service life even amidst the most demanding environments. These bearings are the heart of our pumps, ensuring long-lasting reliability.
To adeptly balance axial thrust, most of our impellers are equipped with wear rings both in the front and back, alongside a strategically placed balance hole on the impeller's back shroud. For pumps with minimal axial thrust, these components might not be necessary, providing design flexibility.
Our high-precision casting impellers are crafted to ensure optimal performance, available in robust materials such as cast iron, stainless steel, and bronze, catering to various operational needs with exceptional engineering.
We categorize our offerings into two significant segments:
1) "Flush" - Here, a clean, cool liquid is precisely injected into the seal chamber to optimize the operational environment. An additional, smaller port, typically positioned downward, serves as a leakage observation or vent opening, providing crucial monitoring and safety.
2) "Barrier or Buffer" with dual seals - This innovative design introduces a secondary fluid between two mechanical seals, effectively preventing ambient air from compromising the pumped fluid. This system enhances seal cooling and elevates safety standards.
It is noteworthy that not all mechanical seals necessitate specialized external flush systems, allowing for simplification where applicable.
Versatile Couplings for Dynamic Applications
Flexible couplings stand apart from rigid ones by accommodating slight movements like vibrations and thermal expansion without sustaining damage. Perfect for scenarios with inevitable misalignment between the drive and pump shafts, these couplings excel at absorbing vibrations, which diminishes operating noise. While their design is intricate and comes at a higher cost, flexible couplings provide significant maintenance savings by safeguarding shafts and bearings from premature wear.
Our Semhai API standard chemical pumps incorporate the high-performing API 671 Standard Disc Couplings.
These couplings boast reduced reaction loads and superior balancing quality compared to regular couplings, resulting in enhanced efficiency and effectiveness throughout the entire pump power transmission process.
| 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. has cultivated enduring partnerships with a distinguished network of prominent domestic pump-testing institutions. These alliances underscore our commitment to excellence and innovation, ensuring that our products meet the highest industry standards.
National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City. This esteemed institution provides rigorous testing services, ensuring our pumps meet and exceed national quality standards.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City. This center's expertise in irrigation machinery bolsters the reliability and performance of our state-of-the-art pumps.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City. Their stringent supervision guarantees the optimum quality and efficiency of our water pump products.
Shanghai Mechanical and Electrical Products Quality Inspection Center, located in Shanghai City, further fortifies our product quality assurance with comprehensive testing and inspection protocols.
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