Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, meticulously standardized to EN 22858 / ISO 2858. This engineering marvel is versatile, designed to cater to a vast spectrum of applications across industrial and marine markets. It is adept at handling low viscosity clean or slightly contaminated fluids, ensuring the absence of solid or fibrous impurities. Whether it's fresh water, sea water, or fuels like diesel, petrol, and kerosene, this pump delivers unmatched performance. Its widespread applications encompass fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurisation, grey water management, dewatering, and marine operations, making it an indispensable tool for modern industry.
Welcome to the world of robust solutions with this large, heavy-duty centrifugal chemical process pump. Engineered for high flow and high pressure capabilities, it is your go-to choice for power and reliability.
Discover the myriad benefits of our long coupled centrifugal chemical process pump design. It combines functionality with durability, ensuring optimal performance and ease of maintenance.
The long coupled configuration is a boon for maintenance, allowing easy access to the pump head without the cumbersome task of removing the motor. This ensures uninterrupted operations and convenience.
Built for endurance, this process pump is robustly designed for continuous use. Additional bearings in the pump head alleviate motor strain during operation, enhancing longevity and reliability.
Efficient time management is key with our back pull out design, allowing the motor to be detached while the pump remains connected to the pipework. This results in substantial time savings during service and maintenance.
Our centrifugal chemical process pump boasts independent shafts for the pump and motor. In an event of shaft malfunction, only the pump shaft requires replacement. This contrasts markedly with less robust models that necessitate full motor replacement in case of shaft failure.
The long coupled design advantageously creates a vast space between the pump and motor, safeguarding the motor from fluid ingress during a seal failure, thus extending its service life.
Product Summary
• Expertly pumps a diverse range of clean, low viscosity or slightly contaminated fluids, adapting to various industrial needs.
• Choose between closed or semi-open impeller designs, tailored to your operational requirements.
• The back pull out design ensures swift and hassle-free maintenance, minimizing downtime.
• Capable of handling fluids at a maximum temperature of 175°C, designed for high-performance tasks.
• Features a heavy-duty shaft that remains untouched by fluid, ensuring longevity and reliability.
• An optional external seal cooling system enhances durability and operational efficiency.
• Boasts independent pump and motor shafts to simplify maintenance and extend equipment lifespan.
• Available in a range of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and custom materials upon request, catering to diverse environmental demands.
• 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 ensuring compatibility and reliability.
• Offers flexible sealing options, including gland packing or single, double, and cartridge mechanical seals.
• Equipped with three-phase 50hz / 60hz motors and IP55 standard, designed to meet industrial power needs.
• ATEX version available upon request, tailored for environments requiring explosion-proof solutions.
• Independent certification can be provided upon request, assuring quality and compliance with industry standards.
• Manufactured in alignment with EN 22858 / ISO 2858 standards, ensuring global compatibility and trust.
• Low NPSH feature minimizes cavitation risk, optimizing pump performance and lifespan.
• Designed for assembly without alignment, simplifying installation and reducing setup time.
• Impellers are meticulously balanced to ISO 1940 class 6.3 standards, guaranteeing stable and efficient operation.
• Long coupled with a robust baseplate, providing stability and durability in demanding applications.
• An API Seal can be integrated according to API682, ensuring industry-standard sealing solutions.
• Oil lubricated ball bearings ensure smooth operation and extended service intervals, enhancing reliability and 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 and chemical pumps are equipped with renowned brand bearings, ensuring superior quality and performance. These bearings are meticulously selected for their durability, promising a prolonged service life even under the most demanding conditions.
To expertly manage axial thrust, our design includes dual wear rings located both at the front and rear of the impeller. Furthermore, a precision-engineered balance hole is positioned on the impeller's back shroud. In certain models, where axial thrust is naturally minimized, the design is simplified by omitting the rear wear ring and balance hole.
The impeller, crafted with high-precision casting techniques, is a keystone of our performance assurance. Available in materials such as cast iron, stainless steel, and bronze, it guarantees robustness and reliability.
Our systems are categorized into two essential groups:
1) "Flush" - A meticulously controlled stream of clean, cool liquid is introduced into the seal chamber, optimizing the operational environment. An auxiliary port, strategically placed downwards, serves dual purposes as an observation point for leakage and as a vent.
2) "Barrier or Buffer" for dual seals - This method involves introducing a secondary fluid into the interspace between two mechanical seals. This prevents ambient air from interacting with the fluid being pumped, enhances seal cooling, and significantly elevates safety measures.
It's important to highlight that not every mechanical seal necessitates specialized external flush systems.
Flexible couplings
In contrast to rigid counterparts, flexible couplings are adept at accommodating movement such as vibrations and thermal expansion. This adaptability is crucial in scenarios with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations also contributes to noise reduction, albeit in a more sophisticated and costly design. Despite the upfront investment, flexible couplings yield savings by preventing shaft and bearing damage, thus extending maintenance intervals.
Semhai's API-standard chemical pumps feature API 671 Standard Disc Couplings.
These couplings deliver reduced reaction loads while offering superior balancing quality compared to conventional couplings, thus enhancing the overall efficiency and effectiveness of pump power transmission systems.
| 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, Shanghai Semhai Pump Co., Ltd., has proudly forged enduring partnerships with several prestigious and large-scale domestic pump-testing institutions. These collaborations are a testament to our commitment to excellence and quality.
National Quality Supervision and Inspection Center of Industrial Pumps, located in the bustling Tiexi District of Shengyang City. Here, rigorous testing ensures that our products meet the highest industry standards.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, nestled in the vibrant Zhenjiang City. This facility meticulously examines our pumps, ensuring they perform flawlessly in industrial applications.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center situated in the dynamic Chongqing City. They play a crucial role in verifying the superior quality of our pumps for agricultural use.
Shanghai Mechanical and Electrical Products Quality Inspection Center, based in the thriving metropolis of Shanghai City. This center further validates our commitment to delivering exceptional pump quality and performance.
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