Introducing the SLZ end-suction, long-coupled, single-stage centrifugal chemical process pump, masterfully engineered to adhere to EN 22858 / ISO 2858 standards. Versatile and reliable, this pump is impeccably designed for an array of applications across industrial and marine markets. It seamlessly handles low-viscosity clean or slightly contaminated fluids, effortlessly managing fresh water, seawater, and fuels such as diesel, petrol, and kerosene. Its adaptability shines in diverse settings, from fuel transfer and chemical processing to energy plants, mining operations, firefighting, irrigation, water supply, water treatment, pressurization systems, grey water management, dewatering, and marine applications.
This formidable centrifugal chemical process pump is crafted for demanding environments, offering high flow and high pressure capabilities. Its heavy-duty design ensures optimal performance and durability, even under the most challenging conditions.
The long-coupled centrifugal chemical process pump design boasts numerous advantages, offering superior performance and ease of maintenance.
Experience effortless maintenance with the long-coupled configuration, which allows direct access to the pump head without the hassle of removing the motor, enhancing operational efficiency.
This robust process pump is engineered for continuous use, featuring additional bearings strategically placed in the pump head. These bearings alleviate significant strain on the motor during operation, ensuring longevity and reliability.
The innovative back pull-out design enables the motor to be removed while the pump remains connected to the pipework, significantly reducing downtime during servicing or maintenance.
This centrifugal chemical process pump and motor feature independent shafts, meaning that only the pump shaft requires replacement in the event of breakage. Unlike less robust alternatives, which necessitate full motor replacement, this design offers a more economical solution.
The strategic long-coupled design creates ample space between the pump and motor, safeguarding the motor from fluid ingress in case of a seal failure, thus enhancing the durability and reliability of the system.
Product Summary
• Capable of efficiently pumping a broad spectrum of clean, low-viscosity or slightly contaminated fluids.
• Comes with the option of closed or semi-open impeller designs, tailored to meet your specific needs.
• Featuring an innovative back pull-out design, ensuring maintenance is both quick and straightforward.
• Handles fluid temperatures up to a maximum of 175°C, showcasing remarkable thermal resilience.
• Heavy-duty shaft construction prevents direct fluid contact, enhancing durability.
• Optional external seal cooling system available, tailored for enhanced operational efficiency.
• Independent pump and motor shafts ensure durability and ease of maintenance.
• Available in a variety of materials, including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more, upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers gland packing or single, double, and cartridge mechanical seal options for versatile application.
• Equipped with three-phase 50Hz/60Hz motors, IP55 as standard, ensuring robust performance.
• ATEX version available upon request, catering to specific needs for explosive atmospheres.
• Independent certification available upon request, offering assurance of quality and compliance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring exceptional quality.
• Features low NPSH, minimizing cavitation and enhancing efficiency.
• Assembly is straightforward, requiring no alignment for quicker installation.
• All impellers are balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long coupled with baseplate for robust structural support.
• API Seal installation available, compliant with API682 standards for superior sealing solutions.
• Oil-lubricated ball bearings, designed for smooth and reliable 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 |
Renowned Brand Bearings are expertly integrated into our centrifugal and chemical pumps, ensuring exceptional durability and reliability even in the most challenging environments. Experience longevity with our pumps that consistently deliver outstanding performance.
To precisely balance axial thrust, our design incorporates both front and rear wear rings on the majority of impellers, complemented by a strategically placed balance hole on the impeller's back shroud. In pumps where axial thrust remains minimal, we ingeniously eliminate the need for both rear wear rings and balance holes, optimizing efficiency.
Our precision-crafted, high-quality casting impellers are designed to deliver optimal performance, available in robust materials such as cast iron, stainless steel, and bronze to meet diverse application needs.
We categorize into two primary groups:
1) "Flush" - This technique involves injecting a clean, cool liquid into the seal chamber, significantly enhancing the operating environment. A secondary, smaller port, typically oriented downward, serves as an observation point for potential leakage or as a vent opening, ensuring comprehensive monitoring.
2) "Barrier or Buffer" designed for dual seals - In this method, a secondary fluid is meticulously supplied to the space between two mechanical seals. This prevents ambient air from interfacing with the pumped fluid, dramatically improves seal cooling, and enhances overall safety measures.
Notably, it's important to recognize that not all mechanical seals demand specialized external flush arrangements.
Versatile Flexible Couplings
In contrast to rigid couplings, flexible couplings offer remarkable versatility by accommodating movements such as vibrations and thermal expansion without incurring damage. This makes them indispensable for scenarios involving unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations not only reduces operating noise but also provides substantial maintenance savings by safeguarding shafts and bearings from premature wear, despite the initially more intricate and costly design.
Semhai's innovative API standard chemical pumps are equipped with API 671 Standard Disc Couplings.
Our couplings boast lower reaction loads and superior balancing quality compared to standard couplings, thereby enhancing both the efficiency and effectiveness of comprehensive pump power transmission.
| 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. boasts a robust and enduring collaboration with some of the most esteemed pump-testing institutions across the nation, ensuring top-notch precision and reliability for our products. Our partnerships include:
The National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City, which is renowned for its comprehensive testing capabilities and adherence to stringent quality standards.
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial based in Zhenjiang City, offering specialized evaluations and insights into irrigation machinery, cementing our pump's excellence.
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, providing rigorous assessments to meet the agricultural sector's demanding performance requirements.
The Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, a leading authority in mechanical and electrical product testing, ensuring our pumps meet the highest industry standards and innovation benchmarks.
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