Experience the unparalleled performance and versatility of the SLZ end suction, long coupled, single stage centrifugal chemical process pump. This exceptional piece of engineering, standardized to EN 22858 / ISO 2858, is tailor-made for a spectrum of applications across industrial and marine markets. Specially crafted to handle low viscosity clean or slightly contaminated fluids, this pump excels without encountering solid or fibrous obstacles. It is adept at managing fluids such as fresh water, sea water, and various fuels like diesel, petrol, and kerosene. Its applications are wide-ranging, encompassing fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing a powerhouse in the realm of centrifugal chemical process pumps, this large, heavy-duty unit boasts impressive high flow and high pressure capabilities, designed to tackle demanding tasks with ease.
Dive into the advantages of the long coupled centrifugal chemical process pump design, offering numerous benefits for optimal operation and maintenance.
Maintenance made effortless: The innovative long coupled configuration provides easy access to the pump head without the necessity of motor removal, streamlining upkeep procedures.
Crafted for relentless performance, this robust process pump incorporates additional bearings within the pump head, significantly reducing motor strain during continuous operation.
The ingenious back pull out design facilitates motor removal while leaving the pump connected to the pipework, enhancing efficiency and saving valuable time during service and maintenance.
Distinctive in its construction, the centrifugal chemical process pump and motor boast independent shafts. This unique feature ensures that only the pump shaft requires replacement in case of damage, sparing the motor, unlike less durable counterparts that necessitate full motor replacement.
The long coupled design creates a generous buffer between the pump and motor, safeguarding the motor from fluid ingress in the event of a seal failure, ensuring longevity and reliability.
Product summary
• Capable of handling a diverse array of clean, low viscosity, or slightly contaminated fluids with ease.
• Flexible options featuring closed or semi-open impeller configurations, catering to specific needs.
• Effortless maintenance with a back pull out design, ensuring rapid and straightforward serviceability.
• Operates effectively with fluids reaching a maximum temperature of 175°C, suited for various thermal requirements.
• Engineered with a durable, heavy-duty shaft that remains isolated from fluid contact, ensuring enhanced durability.
• Equipped with an external seal cooling system, enhancing operational efficiency and pump longevity.
• Features independent pump and motor shafts, optimizing maintenance and minimizing downtime.
• Constructed from robust materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with additional options available upon request.
• Suction and discharge flanges comply with EN 1092-2 / PN 16 standards, with options for steel and stainless steel casings as per EN 1092-1 / PN 16.
• Choose from a variety of sealing options, including gland packing or single, double, and cartridge mechanical seals.
• Available with three-phase 50hz / 60hz motors, meeting IP55 standard protocols for optimal performance.
• ATEX version can be provided upon request, ensuring compliance with explosive atmospheric conditions.
• Obtain independent certification upon request, guaranteeing adherence to quality and safety standards.
• Crafted in accordance with EN 22858 / ISO 2858 standards, ensuring reliable and standardized performance.
• Exceptional low NPSH characteristics, optimizing performance under varying operational conditions.
• Offers assembly without alignment, simplifying installation and reducing setup time.
• All impellers are meticulously balanced to comply with ISO 1940 class 6.3, ensuring smooth and stable operation.
• Designed as long coupled with baseplate, providing stability and support during use.
• Option to install an API Seal according to API682, enhancing sealing integrity and reliability.
• Features oil-lubricated ball bearings, ensuring smooth motion and reducing wear and tear over time.
| 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, incorporating renowned brand bearings, are engineered for longevity, even in the most demanding environments. Expect exceptional durability and performance, thanks to the high-quality bearings that ensure a longer service life, making our pumps a reliable choice for challenging conditions.
To meticulously balance axial thrust, our pumps feature strategically placed wear rings at both the front and back of the impeller, alongside a balance hole on the impeller's rear shroud. For pumps where axial thrust is minimal, these components might not be necessary, underscoring our commitment to tailored precision and efficiency in design.
Our pumps are equipped with high-precision casting impellers, guaranteeing outstanding performance. Available in materials such as cast iron, stainless steel, and bronze, these impellers promise durability and reliability, ensuring that your operational needs are met with excellence.
There are generally two main groups:
1) "Flush" – In this method, pristine, cool liquid is directed into the seal chamber, enhancing the operational environment significantly. A secondary, smaller port—typically oriented downward—facilitates leakage observation or serves as a vent opening, ensuring optimal performance and monitoring.
2) "Barrier or Buffer" for dual seals – This innovative technique involves introducing a secondary fluid into the space between two mechanical seals. This not only prevents ambient air from interacting with the pumped fluid but also improves seal cooling and augments safety, setting a new benchmark for reliability.
It's important to note that not all mechanical seals necessitate unique external flush arrangements, offering flexibility in installation and maintenance.
Flexible couplings
Flexible couplings stand apart from their rigid counterparts by accommodating movements like vibrations and thermal expansion. Perfect for applications with slight misalignments between drive and pump shafts, they absorb vibrations effectively, helping to mitigate excessive noise. While they feature a more intricate and costly design, their ability to protect shafts and bearings from premature damage and wear offers significant maintenance savings over time, making them an intelligent investment.
The Semhai API standard chemical pumps proudly utilize the API 671 Standard Disc Couplings, reflecting our dedication to superior quality and reliability.
Engineered for excellence, these couplings boast lower reaction loads and superior balancing quality compared to typical couplings. This results in enhanced efficiency and effectiveness across the entire pump power transmission, ensuring peak performance and operational success.
| 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 |
Prestigious Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. has fostered enduring partnerships with several eminent large-scale domestic pump-testing institutions, ensuring the highest standards in quality and reliability:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, situated in Zhenjiang City,
The authoritative Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City,
And the distinguished Shanghai Mechanical and Electrical Products Quality Inspection Center, right in the heart of Shanghai City, among others.
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