Introducing the SLZ end suction, long-coupled, single-stage centrifugal chemical process pump! This remarkable piece of engineering adheres to EN 22858 / ISO 2858 standards, poised to meet a vast array of demands across industrial and marine markets. Designed for precision and efficiency, it adeptly handles low-viscosity fluids, whether clean or slightly contaminated, free from fibrous and solid impurities. Ideal for transferring fresh or seawater, as well as fuels like diesel, petrol, and kerosene, its impressive versatility extends to applications such as fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, and marine operations.
This is a formidable, heavy-duty centrifugal chemical process pump engineered to deliver high flow rates and withstand high pressures, making it an indispensable asset for demanding applications.
Experience unparalleled benefits with our long-coupled centrifugal chemical process pump design, crafted for optimal functionality and ease of use.
The long-coupled configuration ensures unparalleled ease of maintenance, allowing effortless access to the pump head without necessitating motor removal.
Built for resilience and continuous use, this robust process pump features additional bearings within the pump head, significantly reducing motor strain and enhancing durability during operation.
Our back pull-out design facilitates the removal of the motor while keeping the pump securely connected to the pipework, paving the way for time-efficient servicing and maintenance.
An independent shaft system defines our centrifugal chemical process pump, necessitating only pump shaft replacement in case of breakage—a stark contrast to less robust market alternatives that require entire motor replacement upon similar issues.
The long-coupled layout strategically places ample space between pump and motor, safeguarding the motor against fluid ingress during seal failures, thus enhancing longevity and reliability.
Product Summary
• Capable of pumping an extensive range of clean low-viscosity or mildly contaminated fluids.
• Offers flexibility with closed or semi-open impeller options to suit diverse needs.
• Features a back pull-out design for swift, hassle-free maintenance.
• Withstands maximum fluid temperatures up to an impressive 175°C.
• Heavy-duty shaft design ensures no fluid contact, preserving structural integrity.
• Equipped with an external seal cooling system for optimal performance.
• Independent pump and motor shafts for enhanced maintenance ease.
• Available in robust materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and customizable upon request.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with options for steel and stainless steel casings according to EN 1092-1 / PN 16.
• Offers versatility with gland packing or single, double, and cartridge mechanical seal options.
• Supports three-phase 50hz / 60hz motors, with IP55 as the standard protection level.
• ATEX-certified versions available upon request for specialized applications.
• Third-party certification available upon request, ensuring compliance and quality assurance.
• Rigorously manufactured in line with EN 22858 / ISO 2858 standards for guaranteed reliability.
• Low NPSH enhances efficiency and minimizes cavitation risk.
• Streamlined assembly process negates the need for alignment, simplifying installation.
• All impellers are meticulously balanced as per ISO 1940 class 6.3 standards for smooth operation.
• Long-coupled design integrated with a sturdy baseplate for stability and durability.
• Option to install an API Seal as per API682, ensuring superior sealing performance.
• Oil-lubricated ball bearings enhance operational smoothness and longevity.
| 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 |
Renowned Brand Bearings: Our centrifugal and chemical pumps feature the acclaimed bearings known for their robustness and longevity. These components promise an extended service life, even under the most rigorous conditions.
Precision in Axial Thrust Balance: Our impeller design incorporates wear rings both in the front and rear, complemented by a balance hole on the back shroud. For pumps with minimal axial thrust, these features are streamlined, omitting the rear wear ring and balance hole, ensuring efficiency without compromise.
High-Precision Casting Excellence: Our impellers, crafted with high-precision casting techniques, guarantee superior performance. Available in durable materials such as cast iron, stainless steel, and bronze, these impellers stand as a testament to our commitment to quality.
Two Distinctive Seal Fluid Groups:
1) "Flush" Method: This involves injecting a clean, cool liquid into the seal chamber, optimizing the operational environment. An additional, smaller port, usually positioned downward, is provided for leakage monitoring and ventilation.
2) "Barrier or Buffer" for Dual Seals: This approach feeds a secondary fluid between two sets of mechanical seals, preventing ambient air interaction with the pumped medium. This not only enhances seal cooling but also bolsters safety and reliability.
Notably, many mechanical seals function efficiently without the necessity for specialized external flush systems.
Sophisticated Flexible Couplings
Versatile and Durable: Flexible couplings offer the advantage of accommodating slight movements like vibrations and thermal expansion, making them ideal for scenarios with unavoidable misalignment between drive and pump shafts. Their vibration absorption capability also reduces operational noise. Though their design is intricate and costlier than rigid couplings, the long-term savings in maintenance, by safeguarding shafts and bearings, justify the investment.
Standardized Excellence: Our Semhai API standard chemical pumps integrate API 671 Standard Disc Couplings, ensuring stellar performance.
Enhanced Operation: Featuring lower reaction loads and superior balancing quality compared to conventional couplings, our design amplifies pump 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 forged enduring partnerships with an array of prestigious domestic pump-testing institutions, ensuring unparalleled quality and performance assurance. Our esteemed collaborators include:
The National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City,
The Irrigation Machinery Products Quality Inspection Center of the Machinery Industry, based in Zhenjiang City,
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center situated in Chongqing City,
The Shanghai Mechanical and Electrical Products Quality Inspection Center, a prominent entity in Shanghai City, among others.
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