Discover the unmatched versatility of the SLZ end suction, long coupled, single-stage centrifugal chemical process pump. Standardized to EN 22858 / ISO 2858, it seamlessly serves a plethora of applications across industrial and marine markets. Expertly engineered, this pump handles low viscosity, clean, or slightly contaminated fluids, steering clear of solid or fibrous particulates. Its repertoire includes the efficient pumping of fresh water, sea water, and various fuels—diesel, petrol, and kerosene. Its utility shines in fuel transfer, chemical processes, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations. Designed to perform with precision and reliability, the SLZ pump is your trusted partner in fluid management.
Behold the robust and mighty centrifugal chemical process pump, designed for high flow and pressure capabilities—ideal for heavy-duty operations that demand excellence.
Unlock the multitude of advantages that come with the long coupled centrifugal chemical process pump design, crafted for superior performance and ease of use.
The thoughtfully designed long coupled configuration ensures effortless maintenance. Access the pump head with ease, sans the need to detach the motor, ensuring minimal downtime and maximum efficiency.
Built for relentless operation, this process pump boasts a robust design equipped with additional bearings in the pump head. These bearings significantly reduce strain on the motor during operation, ensuring durability and continuous use.
Experience the advantage of the back pull out design, enabling seamless motor removal while the pump remains connected to the pipework, thereby facilitating substantial time savings during service or maintenance routines.
Our centrifugal chemical process pump and motor feature independent shafts, ensuring greater reliability. Should the pump shaft need replacement, it stands alone without necessitating a full motor replacement—unlike less robust market alternatives.
The intelligent long coupled design creates ample space between the pump and motor, safeguarding the motor from fluid ingress in case of seal failure, thus enhancing durability and operational safety.
Product Summary
• Expertly pumps a diverse selection of clean, low viscosity, or slightly contaminated fluids with unrivaled efficiency.
• Available with your choice of closed or semi-open impeller, tailored to meet specific operational needs.
• Back pull out design ensures maintenance is swift and user-friendly, reducing downtime.
• Capable of handling fluids up to a remarkable 175°C, showcasing its high-temperature tolerance.
• Sturdy heavy-duty shaft ensures no direct contact with the fluid, enhancing longevity.
• Option for an external seal cooling system available to optimize performance under demanding conditions.
• Distinctly engineered with independent pump and motor shafts to enhance reliability and serviceability.
• Crafted in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, offering tailored solutions.
• Suction and discharge flanges are in strict conformance with EN 1092-2 / PN 16, with options for steel and stainless steel casings adhering to EN 1092-1 / PN 16.
• Versatile sealing options include gland packing or single, double, and cartridge mechanical seals to fit diverse needs.
• Equipped with robust three-phase 50hz/60hz motors, with IP55 rating as standard, ensuring resilience and reliability.
• For environments requiring additional safety, an ATEX version is available upon request.
• Independent certification available upon request, attesting to the product's superior quality and compliance.
• Manufactured to meet the stringent standards of EN 22858 / ISO 2858, ensuring quality and consistency.
• Designed with low NPSH, reducing the risk of cavitation and enhancing operational efficiency.
• Facilitates assembly without alignment, simplifying setup and reducing installation time.
• All impellers are meticulously balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Features a long coupled design with a baseplate, providing stability and robust support.
• Can accommodate an API Seal, manufactured in accordance with API682, to meet rigorous industry standards.
• Oil lubricated ball bearings are incorporated, promoting smooth operation and extended service life.
| 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 esteemed centrifugal and chemical pumps boast the inclusion of renowned brand bearings. These components significantly extend the life expectancy of our pumps, ensuring reliable performance even under the most demanding conditions.
To skillfully manage axial thrust, our pumps are innovatively designed with wear rings positioned at both the forefront and rear of the impeller. Additionally, a strategically placed balance hole on the back shroud further enhances their functioning. For certain pumps where axial thrust is minimal, the rear wear ring and balance hole are conveniently omitted.
Our high-precision casting impellers are crafted to perfection, ensuring exceptional performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers meet diverse application demands.
There are generally two main groups:
1) "Flush" - This method entails introducing a clean, cool liquid into the seal chamber, thus optimizing the operating environment. A secondary, smaller port—usually oriented downward—serves as a convenient leakage observation or vent opening.
2) "Barrier or Buffer" for dual seals - Here, a secondary fluid is introduced into the space separating two sets of mechanical seals. This prevents ambient air from coming into contact with the pumped fluid, improves seal cooling, and significantly enhances safety measures.
It is crucial to note that not all mechanical seals necessitate specialized external flush arrangements.
Flexible couplings
In contrast to rigid designs, flexible couplings adeptly accommodate movement such as vibrations and thermal expansion without sustaining damage. This flexibility makes them ideal for scenarios involving unavoidable misalignment between the drive and pump shafts. Remarkably efficient at absorbing vibrations, they also play a role in reducing excessive operational noise. While these benefits come with a more intricate and costly design, flexible couplings ultimately offer maintenance savings by safeguarding shafts and bearings from damage and premature wear.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, ensuring superior performance.
These couplings deliver lower reaction loads while providing enhanced efficiency and effectiveness in pump power transmission, thanks to their superior balancing quality compared to standard couplings.
| 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
This prestigious company, Shanghai Semhai Pump Co., Ltd., has forged enduring and robust partnerships with a host of prominent domestic pump-testing institutions. These collaborations are a testament to their commitment to excellence.
Among these esteemed partners is the National Quality Supervision and Inspection Center of Industrial Pumps, located in the bustling Tiexi District of Shengyang city. This center is renowned for its rigorous standards and meticulous attention to detail.
Another notable partner is the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in the vibrant Zhenjiang City, recognized for its cutting-edge inspection techniques and unwavering dedication to quality.
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center, situated in Chongqing city, is also a key ally, celebrated for its comprehensive testing protocols and innovative methodologies.
Additionally, the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai city adds to this prestigious list, bringing its extensive expertise and advanced technological capabilities to the table.
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