The SLZ end suction, long coupled, single stage centrifugal chemical process pump is standardized to EN 22858 / ISO 2858, ensuring reliability and consistency across various industrial and marine applications. Designed with precision to handle low viscosity clean or slightly contaminated fluids without fibrous solids, this pump efficiently manages a variety of liquids, including fresh water, sea water, and fuels such as diesel, petrol, and kerosene. Its versatility extends to a wide range of applications, including fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
This robust centrifugal chemical process pump boasts high flow and high pressure capabilities, tailored for demanding industrial requirements.
The long coupled centrifugal chemical process pump design offers a multitude of advantages, enhancing operational efficiency.
Its long coupled configuration simplifies maintenance, enabling easy access to the pump head without the need to detach the motor, thereby reducing downtime.
Engineered for durability, this process pump is built for continuous operation, featuring additional bearings in the pump head to alleviate motor strain during intense use.
The innovative back pull out design allows for motor removal while keeping the pump connected to the pipework, significantly saving time during maintenance and servicing.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement in case of damage, unlike less robust alternatives where a broken shaft necessitates a full motor replacement.
The long coupled design provides ample space between the pump and motor, minimizing the risk of motor damage from fluid ingress due to seal failure.
Product summary
• Capable of pumping a diverse range of clean low viscosity or slightly contaminated fluids
• Offered with closed or semi-open impellers for various applications
• Back pull out design facilitates rapid and straightforward maintenance
• Handles fluid temperatures up to a maximum of 175°C
• Equipped with a heavy-duty shaft that remains unaffected by fluid contact
• Optional external seal cooling system available for enhanced performance
• Features independent pump and motor shafts for easier maintenance
• Available in materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards; options for flanges conforming to EN 1092-1 / PN 16 for steel and stainless steel casings
• Offers gland packing or single, double, and cartridge mechanical seal options
• Three-phase motors available in 50Hz / 60Hz, with IP55 as standard
• ATEX version available upon request for explosive environments
• Independent certification available to meet specific requirements
• Manufactured in compliance with EN 22858 / ISO 2858 standards, ensuring quality and reliability
• Designed with low NPSH to minimize cavitation
• Easy assembly process without alignment for quick installation
• All impellers meticulously balanced according to ISO 1940 class 6.3, ensuring smooth operation
• Long coupled design complete with baseplate for robust installation
• API Seal installation available according to API682 standards
• Equipped with oil-lubricated ball bearings for smooth and efficient 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 |
Our centrifugal and chemical pumps are powered by prestigious brand bearings, ensuring unrivaled durability and performance. Anticipate significantly extended service life even when the conditions are at their most challenging, elevating reliability to new heights.
To masterfully manage axial thrust, our pump designs incorporate front and rear wear rings on most impellers, complemented by a balance hole located on the back shroud. For pumps where axial thrust is minimal, the rear wear ring and balance hole are ingeniously omitted, optimizing efficiency without compromise.
Harnessing the power of high-precision casting, our impellers deliver unmatched performance. Choose from robust materials including cast iron, stainless steel, and bronze, ensuring excellence in every application.
Our innovative sealing solutions are distinguished by two primary systems:
1) "Flush" - This system introduces a clean, cooling liquid into the seal chamber, refining the operational setting. A strategically placed secondary port often serves as a leakage monitor or vent, maintaining performance integrity.
2) "Barrier or Buffer" for dual seals - By supplying a secondary fluid between the mechanical seals, we prevent ambient air intrusion, enhance cooling efficiency, and prioritize safety, making it an essential feature for high-demand applications.
It's important to note that not all mechanical seals require these specialized external flush systems, showcasing versatility and adaptability in our designs.
Flexible Couplings
Flexible couplings surpass rigid alternatives by accommodating movement, such as vibrations and thermal expansion, safeguarding against damage. Ideal for applications with inevitable misalignments, they excel in vibration absorption, reducing noise. Though more complex and costly, they offer significant maintenance savings by shielding shafts and bearings from premature wear.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, epitomizing precision and reliability.
These couplings deliver lower reaction loads and superior balancing quality, boosting the entire pump power transmission system with unmatched efficiency and efficacy.
| 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
At Shanghai Semhai Pump Co., Ltd., we have forged strong, enduring partnerships with an array of premier domestic pump-testing institutions. Our collaborations enhance the reliability and excellence of our Horizontal End-Suction Pump for Reliable Chemical Process Applications, ensuring our products meet and exceed industry standards.
Our prestigious partners include the National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City, known for its rigorous testing and quality assurance protocols.
We also collaborate with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, where advanced inspection techniques guarantee the performance and safety of our products.
Our partnership with the Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City further underscores our commitment to delivering pumps of unmatched quality and reliability.
Additionally, we work closely with the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, ensuring our products are at the forefront of innovation and compliance in the industry.
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