Discover the SLZ end suction, long-coupled, single-stage centrifugal chemical process pump, expertly standardized to EN 22858 / ISO 2858. Engineered for ultimate versatility, it serves a broad spectrum of applications across industrial and marine markets. This state-of-the-art pump handles low viscosity, clean or subtly contaminated fluids effortlessly, absent of solid or fibrous particles. Ideal for pumping fresh water, sea water, and fuels like diesel, petrol, and kerosene, it shines in tasks such as fuel transfer, chemical processing, energy plant operations, mining, firefighting, irrigation, water supply, treatment, pressurization, greywater management, dewatering, and marine applications.
Introducing a formidable force in fluid dynamics: a substantial, heavy-duty centrifugal chemical process pump, renowned for its remarkable high flow and pressure capabilities.
The long-coupled centrifugal chemical process pump design unveils a multitude of advantages that elevate its performance.
Maintenance made simple: the long-coupled configuration allows seamless access to the pump head without the hassle of motor removal.
Built for endurance, this process pump integrates additional bearings in the pump head, significantly reducing motor strain and ensuring continuous, robust operation.
Experience the efficiency of the back pull-out design, which permits motor removal while keeping the pump connected to the pipework, slashing downtime during servicing and maintenance.
Independence in design: the centrifugal chemical process pump and motor boast separate shafts, ensuring that only the pump shaft needs replacement if compromised, unlike less robust models that would necessitate full motor replacement.
The long-coupled design strategically creates ample space between the pump and motor, safeguarding the motor from fluid ingress should a seal failure occur.
Product Summary
• Effortlessly pumps a diverse array of clean, low viscosity or slightly contaminated fluids.
• Choose between closed or semi-open impeller options for tailored performance.
• Innovative back pull-out design ensures maintenance is quick and hassle-free.
• Can withstand a maximum fluid temperature of up to 175°C.
• Features a heavy-duty shaft that remains untouched by the fluid, ensuring durability.
• Optional external seal cooling system enhances performance in demanding conditions.
• Independent pump and motor shafts offer practical benefits and extended longevity.
• Available in materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges align with EN 1092-2 / PN 16 standards, and EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers a variety of sealing options: gland packing, single, double, and cartridge mechanical seals.
• Equipped with three-phase 50Hz/60Hz motors, IP55 protection as standard.
• ATEX-compliant versions available upon request for specialized environments.
• Independent certification can be provided upon request, ensuring peace of mind.
• Meets rigorous manufacturing standards of EN 22858 / ISO 2858.
• Low NPSH design minimizes cavitation risks and enhances performance.
• Assembly is straightforward and requires no alignment, ensuring a smooth setup.
• All impellers are meticulously balanced to ISO 1940 class 6.3, ensuring optimal efficiency.
• Long-coupled with a robust baseplate for added stability.
• Option to install an API Seal according to API682 for enhanced sealing solutions.
• Oil-lubricated ball bearings for smooth operation and prolonged lifespan.
| 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 are engineered using renowned brand bearings, ensuring exceptional durability. Experience prolonged service life even in the toughest environments with our meticulously crafted centrifugal pumps.
To expertly balance axial thrust, our pumps feature wear rings positioned both in front and behind most impellers, alongside a strategically placed balance hole on the back shroud. For pumps with minimal axial thrust, these components may be omitted, ensuring optimal performance.
Precision is at the heart of our pump design. Our high-precision casting impellers guarantee unparalleled performance, available in robust materials such as cast iron, stainless steel, and bronze.
Typically, there are two principal categories:
1) "Flush" - A pure, cool liquid is directed into the seal chamber, enhancing the operational environment. An additional, smaller port usually oriented downward, serves as a leakage observation point or vent opening.
2) "Barrier or Buffer" with dual seals - A secondary fluid is introduced between the mechanical seals, safeguarding against ambient air intrusion, boosting seal cooling, and elevating safety measures.
It's noteworthy that not all mechanical seals demand specialized external flush systems.
Flexible couplings
In contrast to rigid couplings, flexible couplings adeptly handle movement such as vibrations and thermal expansion, making them perfect for scenarios with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations not only minimizes noise but also protects shafts and bearings from damage, reducing maintenance costs over time despite their intricate, costlier design.
Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings.
These couplings offer superior balancing quality and reduced reaction loads compared to typical couplings, significantly enhancing the pump's power transmission efficiency and effectiveness.
| 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 myriad of prestigious pump-testing institutions across the nation, ensuring top-tier quality and performance. Some of these esteemed collaborations include:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in the heart of Tiexi District, Shengyang City, known for its rigorous standards and unparalleled expertise.
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, a leader in innovative testing methodologies.
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, a pivotal player in agricultural technology enhancement.
The Shanghai Mechanical and Electrical Products Quality Inspection Center, an esteemed establishment in Shanghai City, renowned for its cutting-edge inspection capabilities and commitment to excellence.
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