Introducing the remarkable SLZ end-suction, long coupled, single-stage centrifugal chemical process pump. Exquisitely standardized to EN 22858 / ISO 2858, this pump transcends utility across a spectrum of industrial and marine applications. Elegantly crafted to manage low-viscosity, clean, or slightly contaminated fluids, it excludes fibrous solids and excels with fresh water, sea water, and an array of fuels such as diesel, petrol, and kerosene. Its versatile application range encompasses fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, treatment, pressurization, greywater management, dewatering, and marine services.
Experience the awe-inducing power of our robust centrifugal chemical process pump, tailored for heavy-duty applications boasting impressive high flow and high pressure capabilities.
Delve into the myriad benefits presented by the ingenious design of our long coupled centrifugal chemical process pump.
Enjoy effortless maintenance with our long coupled configuration, granting easy access to the pump head without the need to detach the motor.
This pump exemplifies durability and is engineered for continuous operation. Additional bearings in the pump head relieve motor strain, ensuring enduring performance.
Embrace efficiency with the back pull-out design, allowing the motor to be removed seamlessly while the pump remains connected, significantly reducing maintenance downtime.
With independent shafts for the pump and motor, only the pump shaft needs replacement if damaged, contrasting with less durable models that require full motor replacement.
The expansive gap between pump and motor in our long coupled design shields the motor from fluid ingress in case of seal failure, ensuring enduring reliability.
Product Summary
• Efficiently handles an extensive array of clean, low viscosity or slightly contaminated fluids
• Choose between a closed or semi-open impeller to suit your specific needs
• Designed with a back pull-out system for swift and hassle-free maintenance
• Capable of handling fluid temperatures up to an impressive 175°C
• Features a robust shaft that remains untouched by the fluid, enhancing longevity
• Option for external seal cooling system to ensure optimal performance
• Distinct pump and motor shafts for specialized operational efficiency
• Available in a variety of materials such as cast iron, 316 stainless steel, duplex stainless steel, and bronze, with customization options upon request
• Adheres to EN 1092-2 / PN 16 flange standards for suction and discharge; EN 1092-1 / PN 16 for steel and stainless steel casings
• Offers versatile sealing options including gland packing or single, double, and cartridge mechanical seals
• Equipped with three-phase 50hz / 60hz motors, with IP55 protection as standard
• ATEX-compliant version available on request for hazardous environments
• Independent certification options available upon request for stringent compliance needs
• Proudly manufactured in compliance with EN 22858 / ISO 2858 standards
• Designed to operate efficiently with low NPSH, optimizing system performance
• Simplified assembly without the need for alignment, facilitating quick installation
• All impellers are meticulously balanced according to ISO 1940 class 6.3 ensuring smooth operation
• Features a long coupled design complete with a sturdy baseplate
• Capable of accommodating an API Seal, compliant with API682, for enhanced sealing solutions
• Utilizes oil-lubricated ball bearings, offering superior reliability and reduced maintenance
| 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 proudly incorporate world-renowned brand bearings, ensuring exceptional longevity even amidst the most challenging operational environments. Expect our pumps to perform tirelessly, delivering reliability and durability you can rely on.
To expertly counteract axial thrust, most impellers are equipped with strategically placed wear rings at both the front and rear, complemented by a balance hole on the back shroud. For those pumps where axial thrust is minimal, the design is streamlined, eliminating the need for a rear wear ring and balance hole, optimizing efficiency.
Crafted with precision, our high-precision casting impellers are designed to ensure optimal performance, available in materials such as cast iron, stainless steel, and bronze, tailored to meet diverse industrial needs.
Our design philosophy encompasses two primary groups:
1) "Flush" - This innovative approach involves injecting a clean, cool liquid into the seal chamber, enhancing the working environment. A secondary, smaller port, typically oriented downward, serves dual roles as a leakage monitor and vent, ensuring seamless operation.
2) "Barrier or Buffer" for dual seals - This method introduces a secondary fluid between dual mechanical seals, effectively preventing ambient air from contaminating the pumped fluid. This not only boosts seal cooling but significantly elevates safety measures.
It is noteworthy that not every mechanical seal necessitates specialized external flush systems, offering flexibility in implementation.
Flexible couplings
In contrast to rigid couplings, flexible couplings are adept at accommodating movement, such as vibrations and thermal expansions, without incurring damage. Perfect for scenarios where misalignment is inevitable between drive and pump shafts, these couplings absorb vibrations, mitigating operational noise. Although their design is more intricate and costly, the long-term savings on maintenance due to protection against shaft and bearing damage make them a wise investment.
Semhai's API standard chemical pumps proudly feature API 671 Standard Disc Couplings, epitomizing industry excellence.
Delivering lower reaction loads and superior balancing quality, these couplings enhance the overall efficiency and effectiveness of the entire pump power transmission system, setting a new benchmark for performance.
| 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 premier domestic pump-testing institutions, ensuring our products meet the highest industry standards. Our commitment to quality is reflected in our collaborations with:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City, where cutting-edge testing methodologies are employed to uphold excellence,
The esteemed Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, known for rigorous testing and evaluation,
The renowned Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, offering critical insights into agricultural pump efficiency,
The reputable Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, providing thorough assessments that ensure our products' reliability and performance.
Audited Supplier 
){kind=link}