The SLZ end suction, long coupled, single stage centrifugal chemical process pump is a paragon of engineering excellence, standardized to EN 22858 / ISO 2858. This versatile pump is a powerhouse for a multitude of applications across industrial and marine sectors. Specifically crafted to handle low viscosity clean or slightly tainted liquids without fibrous or solid contaminants, it adeptly manages fluids like fresh water, sea water, and various fuels such as diesel, petrol, and kerosene. The SLZ pump is the ideal choice for functions including fuel transfer, chemical processing, energy plant operations, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing a large-scale, robust centrifugal chemical process pump designed for exceptional high flow and pressure capabilities, ensuring powerful and reliable operation.
Discover the numerous advantages of our long coupled centrifugal chemical process pump design, enhancing performance and ease of use.
Experience unparalleled convenience with our long coupled configuration, allowing effortless maintenance. Access the pump head seamlessly without the need to detach the motor, simplifying your maintenance routine.
This process pump stands as a testament to durability, engineered for relentless use. Enhanced with additional bearings in the pump head, it significantly reduces operational stress on the motor, ensuring longevity and consistent performance.
Thanks to the innovative back pull-out design, the motor can be detached with ease while the pump remains connected to the pipework, providing significant time savings during service and maintenance operations.
Our centrifugal chemical process pump features independently operated shafts for both the pump and motor, offering a significant advantage. In the event of a shaft break, only the pump shaft requires replacement, unlike less robust models that necessitate replacing the entire motor.
The long coupled design strategically creates a protective distance between the pump and motor, guarding the motor against fluid ingress in the event of seal failure, thus enhancing equipment protection.
Product summary
• Efficiently pumps a diverse range of clean, low viscosity, or slightly contaminated fluids.
• Options for closed or semi-open impeller to suit varying operational needs.
• Back pull-out design streamlines maintenance, ensuring quick and hassle-free servicing.
• Handles maximum fluid temperatures of up to 175°C without compromising performance.
• Heavy duty shaft designed to avoid contact with fluid, ensuring durability.
• Optional external seal cooling system available for enhanced operational efficiency.
• Independent pump and motor shafts for straightforward and cost-effective maintenance.
• Constructed from high-quality materials; available in cast iron, 316 stainless steel, duplex stainless steel, bronze, and other materials upon request.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards. Flanges conform to EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers gland packing or single, double, and cartridge mechanical seal options to suit diverse sealing requirements.
• Powered by three-phase 50hz / 60hz motors, with IP55 protection as a standard feature.
• ATEX-certified version available upon request for enhanced safety in explosive environments.
• Independent certification available upon request, offering assurance of quality and compliance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring reliability and consistency.
• Designed with low NPSH to minimize cavitation risks and optimize pump efficiency.
• Facilitates assembly without alignment, simplifying installation and operational setup.
• All impellers are meticulously balanced to ISO 1940 class 6.3 standards, ensuring smooth and efficient operation.
• Long coupled with a sturdy baseplate for enhanced stability and support.
• Capable of accommodating an API seal, compliant with API682 standards for secure sealing solutions.
• Equipped with oil-lubricated ball bearings to ensure smooth and reliable operation over extended periods.
| 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 pump products proudly incorporate the renowned bearings from famous brands, ensuring significantly longer service life, even when faced with the most challenging environments.
In order to expertly manage axial thrust, most impellers are equipped with wear rings both front and back, complemented by a strategically placed balance hole on the rear shroud. In pumps where axial thrust is minimal, the absence of a rear wear ring and balance hole is a testament to their precise engineering.
The impeller, crafted through high-precision casting, boasts superior performance with options available in cast iron, stainless steel, and bronze, ensuring reliability and versatility.
Generally, two primary groups can be identified:
1) "Flush" - In this method, a stream of clean, cool liquid is introduced into the seal chamber, enhancing the operating conditions. A secondary, smaller port, typically oriented downward, serves as a leakage observation or vent, providing critical operational insights.
2) "Barrier or Buffer" used with dual seals - This system introduces a secondary fluid to the interspace between dual mechanical seals, effectively preventing ambient air from interfacing with the pumped fluid, thus improving seal cooling and elevating safety standards.
It's important to note that not all mechanical seals require specialized external flush arrangements.
Adaptable and Resilient Couplings
Flexible couplings, distinct from their rigid counterparts, adeptly accommodate movements such as vibrations and thermal expansion, rendering them perfect for settings with unavoidable misalignment between the drive and pump shafts. Their ability to absorb vibrations effectively contributes to reduced noise levels, offering a quieter operation. While their intricate design presents a higher initial cost, these couplings provide long-term savings by safeguarding shafts and bearings from potential damage and premature wear, thus minimizing maintenance requirements.
Semhai's chemical pumps adhere to API standards by integrating API 671 Standard Disc Couplings, ensuring top-tier performance.
Featuring lower reaction loads and superior balancing quality than conventional couplings, our solution significantly enhances efficiency and effectiveness throughout the entire pump power transmission process.
| 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: Strategic Alliances for Enhanced Performance
With a commitment to excellence, our company has forged long-term strategic partnerships with a prestigious array of leading domestic pump-testing institutions, including:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps located in the industrious Tiexi District of Shengyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, proudly situated in Zhenjiang City,
The distinguished Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, positioned in the vibrant city of Chongqing,
And the prestigious Shanghai Mechanical and Electrical Products Quality Inspection Center, located in the dynamic Shanghai City, among others.
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