The SLZ end suction, long-coupled, single-stage centrifugal chemical process pump is expertly standardized to EN 22858 / ISO 2858, making it a versatile powerhouse suitable for diverse applications in both industrial and marine sectors. Engineered to perfection, it adeptly handles low-viscosity clean or slightly contaminated fluids, even in the absence of solid or fibrous particles. This robust pump thrives on common fluids like fresh water, sea water, and fuels including diesel, petrol, and kerosene. Its applications are manifold, encompassing fuel transfer, chemical processing, energy plants, mining operations, firefighting, irrigation systems, water supply and treatment, pressurization tasks, grey water management, dewatering, and marine uses.
This is a formidable, heavy-duty centrifugal chemical process pump engineered for high flow and high-pressure operations, ensuring robust performance even under demanding conditions.
The long-coupled centrifugal chemical process pump design is a marvel of engineering, offering numerous advantages that enhance efficiency and reliability.
The long-coupled configuration simplifies maintenance significantly, allowing easy access to the pump head without the need to detach the motor, streamlining the upkeep process.
This process pump is a paragon of strength and durability, designed for continuous operation. It features additional bearings installed in the pump head, effectively reducing motor strain and enhancing longevity.
The innovative back pull-out design permits the motor's removal while keeping the pump connected to the pipework, offering substantial time savings during service and maintenance.
Our centrifugal chemical process pump and motor boast independent shafts, meaning only the pump shaft requires replacement if damaged. Unlike less robust models, which risk entire motor replacement if the shaft is compromised, our design represents a cost-effective, resilient solution.
The long-coupled design ensures ample space between pump and motor, safeguarding the motor against fluid ingress in the event of a seal failure, preserving its integrity.
Product Summary
• Capable of pumping a vast array of clean low-viscosity or slightly contaminated fluids with utmost precision.
• Available in both closed and semi-open impeller configurations to suit various operational needs.
• Back pull-out design guarantees swift and effortless maintenance, minimizing downtime.
• Handles maximum fluid temperatures of up to 175°C, ensuring high-temperature operations are managed efficiently.
• Heavy-duty shaft designed to remain fluid-free, enhancing its durability and reliability.
• External seal cooling system available for optimal thermal management and performance.
• Independent pump and motor shafts safeguard against complete motor replacement, boosting cost-efficiency.
• Crafted from a selection of premium materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, with custom materials available 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, ensuring compliance and versatility.
• Offers gland packing or single, double, and cartridge mechanical seal options, catering to a wide range of sealing needs.
• Powered by three-phase 50hz / 60hz motors, with IP55 as standard for reliable performance.
• ATEX version available upon request, meeting stringent safety standards for hazardous environments.
• Independent certification available upon request, ensuring compliance with industry standards.
• Manufactured in strict adherence to EN 22858 / ISO 2858 standards, exemplifying quality and reliability.
• Low NPSH feature to minimize cavitation and ensure efficient operation.
• Assembly without the need for alignment, simplifying installation and reducing setup time.
• All impellers are precision-balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long-coupled with baseplate for enhanced stability and operational efficiency.
• An API Seal is available for installation, conforming to API682 standards, for those requiring extra sealing integrity.
• Equipped with oil-lubricated ball bearings, ensuring 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 centrifugal and chemical pumps are expertly crafted using renowned brand bearings to ensure robust performance and durability. Even in the most challenging of environments, our pumps promise an extended service life, making them a reliable choice for demanding applications.
To ingeniously manage axial thrust, our pumps are equipped with wear rings strategically placed at both the fore and aft of most impellers. Additionally, a balance hole is positioned on the impeller's back shroud. For pumps where axial thrust is minimal, the design is streamlined by omitting the rear wear ring and balance hole.
Leveraging high-precision casting techniques, our impellers guarantee superior performance across materials such as cast iron, stainless steel, and bronze. This meticulous attention to detail ensures reliability and excellence in every use case.
Our systems are categorized into two principal groups:
1) "Flush" - In this method, a clean, cool liquid is meticulously introduced into the seal chamber, optimizing the operational conditions. A secondary, smaller port is typically positioned downward, functioning as a vital leakage observation or vent opening.
2) "Barrier or Buffer" used with dual seals - This system introduces a secondary fluid to the inter-seal space, crucially preventing ambient air from mingling with the pumped fluid. It enhances seal cooling and bolsters safety, ensuring seamless operation.
It's important to highlight that many mechanical seals do not necessitate specialized external flush arrangements, underscoring their versatile and adaptable design.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, are designed to accommodate slight movements such as vibrations and thermal expansion without sustaining damage. Ideal for scenarios where unavoidable misalignment between drive and pump shafts occurs, they excel in absorbing vibrations, thereby diminishing excessive operational noise. Though this complex design may be costlier, the protection they offer against shaft and bearing damage significantly reduces long-term maintenance costs.
Semhai's API standard chemical pumps incorporate the sophisticated API 671 Standard Disc Couplings, exemplifying excellence in design and functionality.
These advanced couplings feature lower reaction loads and superior balancing quality compared to standard couplings, significantly enhancing the pump's overall power transmission efficiency and effectiveness.
| 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. has forged enduring partnerships with a multitude of prestigious pump-testing institutions across the nation. These collaborations underpin our commitment to excellence and reliability.
Among our esteemed partners is the National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City. This premier institution ensures our Stainless Steel Horizontal Pumps adhere to the highest standards of quality and performance.
In Zhenjiang City, we collaborate with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, a cornerstone in validating the efficiency and resilience of our pumping solutions.
At the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, our products undergo rigorous testing, reflecting our dedication to serving critical sectors with unmatched precision.
The Shanghai Mechanical and Electrical Products Quality Inspection Center, right in our home city, further exemplifies our unwavering commitment to delivering flawless, high-performing pump systems.
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