Introducing the formidable SLZ end suction, long coupled, single stage centrifugal chemical process pump—a marvel standardized to EN 22858 / ISO 2858, serving an impressive array of industrial and marine applications. Engineered to perfection, this pump effortlessly handles low viscosity clean or mildly contaminated fluids, gracefully avoiding solid or fibrous materials. Whether it's fresh water, sea water, or vital fuels like diesel, petrol, and kerosene, this pump is your trusty companion. Its versatility shines in diverse applications such as fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Experience the power of this substantial and robust centrifugal chemical process pump, equipped for high flow and pressure demands.
Revel in the advantages of the long coupled centrifugal chemical process pump design, offering unparalleled benefits.
Maintenance has never been easier with the ingenious long coupled configuration, allowing pump head access without motor removal.
Deserving of its reputation for durability, this process pump is engineered for relentless operation, featuring additional bearings in the pump head that significantly relieve motor strain during use.
Thanks to the back pull out design, the motor can be effortlessly removed while the pump remains connected to the pipework, optimizing service and maintenance efficiency.
The centrifugal chemical process pump and motor boast independent shafts, so in the rare event of a shaft break, only the pump shaft needs replacement. Unlike inferior models relying solely on the motor shaft, which require entire motor replacement upon failure.
The long coupled design incorporates a generous gap between the pump and motor, safeguarding the motor from fluid infiltration in the event of a seal failure.
Product Summary
• Seamlessly pumps an extensive range of clean, low viscosity, or slightly contaminated fluids.
• Offers closed or semi-open impeller options to suit diverse needs.
• Features a back pull out design, ensuring quick and hassle-free maintenance.
• Capable of handling fluid temperatures up to a maximum of 175°C.
• Equipped with a heavy-duty shaft designed to avoid fluid contact.
• Comes with an optional external seal cooling system for enhanced performance.
• Boasts independent pump and motor shafts for superior reliability.
• Crafted from a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges in accordance with EN 1092-2 / PN 16 for steel and stainless steel casings, compatible with EN 1092-1 / PN 16.
• Offers gland packing, and single, double, or cartridge mechanical seal options.
• Features three-phase 50hz / 60hz motors, with IP55 protection as standard.
• Available in an ATEX version upon request for specialized environments.
• Independent certification can be provided upon request for assurance.
• Manufactured to the esteemed standards of EN 22858 / ISO 2858.
• Designed with a low NPSH for operational efficiency.
• Enables assembly without the need for alignment, streamlining setup.
• Precision-balanced impellers as per ISO 1940 class 6.3 for optimal performance.
• Long coupled with a sturdy baseplate for enhanced stability.
• Optional installation of an API Seal, compliant with API682, for added security.
• Features oil-lubricated ball bearings for smooth and efficient operation.
| 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 proudly integrate renowned brand bearings, ensuring unparalleled durability and reliability. Even when faced with the toughest environments, the longevity of our pumps sets a new standard in industrial reliability.
To masterfully counterbalance axial thrust, our design incorporates wear rings both at the fore and aft of most impellers, complemented by a strategically placed balance hole on the impeller's back shroud. For pumps with minimal axial thrust, a streamlined design without a rear wear ring or balance hole is employed.
Our high-precision casting impeller is the epitome of performance assurance, crafted meticulously from premium materials including cast iron, stainless steel, and bronze, setting benchmarks in quality and functionality.
There are generally two main groups:
1) "Flush" - Enhance the seal chamber's operating environment by injecting clean, cool liquid. A strategically positioned secondary port, often oriented downward, allows for easy leakage observation or venting.
2) "Barrier or Buffer" with dual seals - A secondary fluid introduced between two mechanical seals prevents ambient air intrusion, enhancing seal cooling and ensuring superior safety and performance.
It's important to note that not every mechanical seal necessitates specialized external flush setups.
Flexible couplings
Flexible couplings, distinct from their rigid counterparts, adeptly accommodate movement such as vibrations and thermal expansion, minimizing potential damage. Ideal for applications with unavoidable misalignment, they not only reduce operating noise through excellent vibration absorption but also offer long-term maintenance savings by shielding shafts and bearings from premature wear. While their intricate design may elevate costs, the protection and operational advantages they provide are invaluable.
Embrace the excellence of Semhai API standard chemical pumps, engineered with API 671 Standard Disc Couplings for superior performance.
Experience lower reaction loads and exceptional balancing quality with our advanced couplings, boosting the entire pump's power transmission efficiency and effectiveness, surpassing conventional designs.
| 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 company has proudly forged enduring partnerships with several eminent domestic pump-testing institutions, ensuring a reputation built on reliability and excellence. Noteworthy among these collaborations are:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in the dynamic Tiexi District of Shengyang City.
The highly regarded Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, situated in the bustling Zhenjiang City.
The esteemed Ministry of Agriculture’s Water Pump Quality Supervision and Testing Center, located in the industrious city of Chongqing.
The prestigious Shanghai Mechanical and Electrical Products Quality Inspection Center in the vibrant city of Shanghai, among various others.
Audited Supplier 
){kind=link}