Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, a marvel of engineering excellence standardized to meet EN 22858 / ISO 2858. Tailored for versatility, this pump excels in a broad array of industrial and marine applications. It effortlessly handles low viscosity clean or slightly contaminated fluids, making it ideal for common fluids like fresh water, sea water, and various fuels such as diesel, petrol, and kerosene. Its versatility extends to numerous applications, including fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization tasks, grey water management, dewatering, and marine operations.
Experience the power of our extensive, robust centrifugal chemical process pump. Designed for heavy-duty tasks, it offers exceptional high flow and high pressure capabilities, ensuring peak performance in demanding environments.
Discover the advantages of our long coupled centrifugal chemical process pump design, delivering outstanding performance and reliability.
Maintenance made simple: The long coupled configuration offers easy access to the pump head without the need to remove the motor, streamlining the maintenance process.
Built for durability and continuous use, this process pump incorporates additional bearings in the pump head, significantly reducing the strain on the motor during operation and enhancing longevity.
Efficiency is key with our back pull out design, allowing for the motor to be conveniently removed while keeping the pump connected to the pipework. This feature saves valuable time during servicing and maintenance.
Benefit from the independence of the centrifugal chemical process pump and motor shafts. In the event of a shaft break, only the pump shaft requires replacement, unlike less robust alternatives that necessitate entire motor replacement.
Our long coupled design offers ample space between the pump and motor, safeguarding the motor from fluid ingress in the event of a seal failure, thus ensuring enhanced protection and reliability.
Product Summary
• Effortlessly pumps a diverse range of clean, low viscosity, or slightly contaminated fluids.
• Available with your choice of closed or semi-open impeller to suit specific needs.
• Quick and simple maintenance assured by the back pull out design.
• Capable of handling fluids with a maximum temperature of up to 175°C.
• Features a heavy-duty shaft designed to avoid contact with the pumped fluid.
• Enhance performance with the optional external seal cooling system.
• Equipped with independent pump and motor shafts for ease of maintenance.
• Crafted in materials ranging from cast iron to 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers a selection of gland packing or single, double, and cartridge mechanical seal options.
• Compatible with three-phase 50Hz / 60Hz motors, featuring IP55 as standard.
• ATEX version available upon request for enhanced safety in explosive environments.
• Independent certification can be provided upon request, ensuring compliance and trust.
• Manufactured to rigorous standards in line with EN 22858 / ISO 2858 for guaranteed quality.
• Features low NPSH for improved performance and efficiency.
• Designed for assembly without alignment, simplifying installation.
• All impellers are precisely balanced according to ISO 1940 class 6.3, ensuring smooth operation.
• Long coupled with baseplate design for enhanced stability and reliability.
• Capable of installing an API Seal in accordance with API682 standards.
• Incorporates oil-lubricated ball bearings to ensure smooth, long-lasting performance.
| 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, including chemical pumps, integrate renowned brand bearings, promising extended durability and performance even in the most challenging environments. Experience longevity and reliability like never before.
To expertly manage and balance axial thrust, our advanced impeller designs feature wear rings at both the front and back, accompanied by a precision-engineered balance hole on the impeller's back shroud. For pumps with minimal axial thrust, these components are tailored to ensure optimal performance without the need for additional wear rings or balance holes.
Our high-precision casting impellers are designed to guarantee outstanding performance. Available in durable materials like cast iron, stainless steel, and bronze, they deliver exceptional quality and reliability.
Our sophisticated systems are categorized into two primary groups:
1) "Flush" System - Designed to inject clean, cool liquid into the seal chamber, this system significantly enhances the operating environment. It features a secondary, strategically positioned port that serves as an efficient leakage observation or vent opening.
2) "Barrier or Buffer" for Dual Seals - This system introduces a secondary fluid to the space between two mechanical seals, effectively preventing ambient air contact with the pumped fluid. It enhances seal cooling and boosts safety.
It's important to note that not all mechanical seals necessitate specialized external flush setups.
Flexible couplings
Flexible couplings surpass rigid ones by accommodating movements like vibrations and thermal expansion without damage. They are perfect for applications with unavoidable misalignments between drive and pump shafts. These couplings not only absorb vibrations effectively, reducing operational noise, but also offer long-term maintenance savings by protecting shafts and bearings from damage and premature wear, despite their more complex and costlier design.
Semhai's API standard chemical pumps incorporate API 671 Standard Disc Couplings, ensuring top-notch operational integrity.
Our couplings boast lower reaction loads and superior balancing quality compared to standard couplings, resulting in enhanced efficiency and effectiveness for 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
Our esteemed company has forged an enduring and robust partnership with numerous prestigious domestic pump-testing institutions. These alliances underscore our commitment to quality and innovation.
We proudly collaborate with the National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, a testament to our dedication to excellence.
Our association with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City exemplifies our pursuit of superior standards and precision.
The Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City is another distinguished partner, further solidifying our industry expertise.
In Shanghai, our collaboration with the Mechanical and Electrical Products Quality Inspection Center reinforces our relentless quest for quality assurance and technical prowess.
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