Introducing the versatile and reliable SLZ end suction, long coupled, single stage centrifugal chemical process pump, crafted to meet the rigorous standards of EN 22858 / ISO 2858. This powerhouse is your go-to solution for a vast array of industrial and marine market applications. Engineered to effortlessly handle low viscosity clean or slightly contaminated fluids without the intrusion of fibrous or solid particles, it's perfect for transporting fresh water, sea water, and various fuels like diesel, petrol, and kerosene. The SLZ pump is indispensable in operations like fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, and treatment, as well as in pressurization, grey water management, dewatering, and marine environments.
This robust centrifugal chemical process pump is designed for high-demand situations, boasting impressive flow and pressure capabilities for large-scale operations.
Explore the myriad benefits of the long coupled centrifugal chemical process pump design, which offers enhanced efficiency and reliability.
Maintenance is a breeze with the long coupled configuration, allowing easy access to the pump head without the need to detach the motor, ensuring reduced downtime.
Built for endurance, this process pump features a robust design with additional bearings in the pump head, minimizing motor strain significantly during continued operation.
The innovative back pull out design allows the motor to be seamlessly removed while keeping the pump connected to the piping, thus saving valuable maintenance time.
Our centrifugal chemical process pump and motor feature independent shafts, so if the pump shaft breaks, only the shaft needs replacement, unlike less durable alternatives where motor replacement is necessary.
The strategic long coupled design creates ample space between the pump and motor, safeguarding the motor from fluid intrusion should a seal failure occur, enhancing protection.
Product Summary
• Capable of handling a diverse range of clean, low viscosity, or slightly contaminated fluids with ease.
• Choose between a closed or semi-open impeller to suit your specific needs.
• Innovative back pull out design for swift and uncomplicated maintenance.
• Handles fluids with temperatures reaching a maximum of 175°C with competence.
• Durable heavy-duty shaft designed to stay out of contact with the fluid, ensuring longevity.
• Optional external seal cooling system to enhance performance.
• Independent pump and motor shafts for targeted maintenance and reliability.
• Available in a variety of materials: cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges adhering to EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless casings.
• Multiple sealing options: gland packing or single, double, and cartridge mechanical seals available.
• Standard three-phase 50hz / 60hz motors with IP55 rating, adaptable to your specific needs.
• ATEX-certified versions available upon request for explosive environments.
• Independent certification can be provided upon request to meet regulatory requirements.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring quality and reliability.
• Engineered for Low NPSH, optimizing performance across applications.
• Features assembly without alignment, simplifying setup and operation.
• All impellers undergo precise balancing in accordance with ISO 1940 class 6.3 standards.
• Long coupled with a sturdy baseplate for enhanced stability and installation ease.
• An API Seal can be seamlessly integrated, meeting API682 standards for additional assurance.
• Equipped with oil-lubricated ball bearings, enhancing the longevity of the equipment.
| 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 pumps/chemical pumps are expertly crafted with top-tier, renowned brand Bearings that promise an extended service life, even under the most challenging working conditions. Experience the reliability and endurance of our products designed for harsh environments.
To expertly manage axial thrust, our design incorporates wear rings both at the front and rear of the impeller, complemented by a strategically placed balance hole on the back shroud of the impeller. For pumps where axial thrust is minimal, the design is efficiently streamlined without a rear wear ring and balance hole.
Our high-precision casting impeller, available in cast iron, stainless steel, and bronze, assures superior performance and reliability. Trust our expert craftsmanship for unmatched quality.
There are generally two main groups:
1) "Flush" - A method where a clean, cool liquid is meticulously injected into the seal chamber, optimizing the operational environment. A secondary, smaller port, usually oriented downward, serves as a crucial leakage observation or vent opening.
2) "Barrier or Buffer" with dual seals - This technique involves feeding a secondary fluid into the space between two mechanical seals, aimed at preventing ambient air from contacting the pumped fluid, thus enhancing seal cooling and bolstering safety.
Remarkably, not all mechanical seals necessitate specialized external flush arrangements, offering flexibility in application.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, adeptly accommodate movements such as vibrations and thermal expansions without sustaining damage. Ideal for scenarios with some unavoidable misalignment between drive and pump shafts, they also effectively reduce excessive operational noise. Although they feature a more complex and costly design, the long-term maintenance savings from protecting the shaft and bearings from damage and premature wear make them a worthy investment.
Shanghai Semhai Pump Co., Ltd. proudly incorporates API 671 Standard Disc Couplings in its API standard chemical pumps, ensuring top-notch performance and reliability.
Our couplings are engineered with lower reaction loads and superior balancing quality, significantly enhancing the efficiency and effectiveness of the whole pump power transmission system.
| 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 |
Expert Partnerships and Professional Collaboration
Shanghai Semhai Pump Co., Ltd. has cultivated enduring and dynamic partnerships with premier national pump-testing institutions, ensuring excellence and reliability in our products. Our trusted alliances include:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps in Tiexi District, Shengyang city,
The prestigious Irrigation Machinery Products Quality Inspection Center of Machinery Industrial located in Zhenjiang City,
The authoritative Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing city,
And the renowned Shanghai Mechanical and Electrical Products Quality Inspection Center, right here in vibrant Shanghai city, among others.
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