Discover the unparalleled versatility of the SLZ end suction, long-coupled, single-stage centrifugal chemical process pump. Meticulously standardized to EN 22858 / ISO 2858, this marvel is crafted for a multitude of applications, thriving in both industrial and marine environments. Designed with precision, it effortlessly handles low viscosity clean or slightly contaminated fluids, adeptly managing without fibrous or solid particles. From fresh water, sea water to various fuels like diesel, petrol, and kerosene, our pump masters it all. Key applications span across fuel transfer, chemical industries, energy plants, mining, firefighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, and marine endeavors.
Introducing a powerhouse: the large, heavy-duty centrifugal chemical process pump, engineered to deliver exceptional high flow and high pressure capabilities. This robust solution is your go-to for demanding applications.
Experience the remarkable advantages of our long-coupled centrifugal chemical process pump design, meticulously engineered for optimal performance and efficiency.
Embrace effortless maintenance with our long-coupled configuration, allowing convenient access to the pump head without detaching the motor, simplifying service procedures.
Designed with durability in mind, this process pump is built for continuous operation. Additional bearings in the pump head effectively alleviate motor strain, ensuring robust performance.
Our innovative back pull-out design allows seamless motor removal while maintaining pipework connection, significantly reducing downtime during servicing and maintenance.
Engineered with independent shafts for the pump and motor, our centrifugal chemical process pump ensures only the pump shaft requires replacement upon breakage, unlike inferior options that demand entire motor replacement.
The ingenious long-coupled design provides ample spacing between the pump and motor, safeguarding the motor from fluid ingress due to seal failures, thus enhancing longevity and reliability.
Product Summary
• Capable of pumping a diverse range of clean, low viscosity, or slightly contaminated fluids efficiently.
• Choose from closed or semi-open impeller options for tailored application needs.
• Featuring a back pull-out design for quick and hassle-free maintenance access.
• Handles maximum fluid temperatures reaching up to 175°C with ease.
• Equipped with a heavy-duty shaft that remains untouched by the fluid, ensuring integrity.
• Optional external seal cooling system available for enhanced performance.
• Designed with independent pump and motor shafts for efficient operation.
• Constructed from materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, and customizable materials upon request.
• Suction and discharge flanges built to EN 1092-2 / PN 16 standards, with alternatives for steel and stainless steel conforming to EN 1092-1 / PN 16.
• Offers gland packing or single, double, and cartridge mechanical seal options for various applications.
• Available with three-phase 50Hz / 60Hz motors, featuring IP55 protection as standard.
• ATEX-compliant versions available upon request, ensuring safety in explosive environments.
• Independent certification available upon request for added assurance and compliance.
• Manufactured to rigorous standards, aligning with EN 22858 / ISO 2858 specifications.
• Designed to ensure low NPSH, minimizing cavitation risk and optimizing efficiency.
• Facilitates assembly without alignment, simplifying installation and setup processes.
• All impellers are precisely balanced to ISO 1940 class 6.3 standards for optimal performance.
• Featuring a long-coupled design complete with baseplate for stability and support.
• Optionally equipped with an API Seal, compliant with API682 standards for superior sealing.
• Incorporates oil-lubricated ball bearings for extended durability and smooth 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 |
Renowned for exceptional quality, our centrifugal pumps and chemical pumps proudly integrate only the highest caliber of famous brand bearings. These bearings ensure our pumps boast an extended service life, even when faced with the most severe and demanding working environments.
For superior balance of axial thrust, our innovative design incorporates wear rings both at the front and back of the majority of impellers, complemented by a strategically placed balance hole on the back shroud. In pumps where axial thrust is minimal, we have expertly optimized the design by omitting the rear wear ring and balance hole, providing efficient performance without unnecessary complexity.
Our high-precision casting impellers are engineered to perfection, guaranteeing optimal performance with materials crafted from cast iron, stainless steel, and bronze for exceptional durability and reliability.
Our solutions are categorized into two main groups:
1) "Flush" - This sophisticated approach introduces clean, cool liquid into the seal chamber, drastically enhancing the operating environment. A secondary, typically downward-oriented port facilitates leakage observation or serves as a vent opening, ensuring operational excellence.
2) "Barrier or Buffer" system for dual seals - A cutting-edge method where a secondary fluid circulates between two mechanical seal sets, preventing ambient air contact with the pumped fluid, greatly improving seal cooling, and substantially enhancing overall safety.
Remarkably, not every mechanical seal necessitates a special external flush arrangement, showcasing the versatility of our design.
Flexible couplings
In contrast to rigid couplings, our flexible couplings adeptly accommodate motions such as vibrations and thermal expansion without incurring damage. This flexibility makes them perfect for situations with inevitable misalignment between drive and pump shafts. They excel at absorbing vibrations, significantly reducing operational noise. Despite the more intricate and costly design, their ability to protect shafts and bearings from damage and premature wear translates into considerable maintenance savings over time.
Our Semhai API standard chemical pumps utilize the prestigious API 671 Standard Disc Couplings.
These couplings offer reduced reaction loads and superior balancing quality compared to conventional couplings, enhancing both the efficiency and effectiveness of the entire 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 |
Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. has forged enduring partnerships with some of the most prominent domestic pump-testing institutions, ensuring top-notch quality and reliability, such as:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City,
The highly respected Irrigation Machinery Products Quality Inspection Center of Machinery Industrial 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 in Shanghai City, among others.
Audited Supplier 
){kind=link}