Introducing the SLZ end suction, long coupled, single-stage centrifugal chemical process pump, meticulously engineered to align with EN 22858 / ISO 2858 standards. This versatile powerhouse is tailored for an extensive array of applications across the industrial and marine landscapes, effortlessly handling low viscosity clean or gently contaminated fluids. Seamlessly adaptable, it tackles fresh water, seawater, and various fuels such as diesel, petrol, and kerosene. Whether it's fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, treatment, pressurization, gray water management, dewatering, or marine operations, this pump stands ready to deliver.
Engineered with precision, this robust centrifugal chemical process pump boasts high flow and high-pressure capabilities, designed specifically for heavy-duty applications.
The long coupled centrifugal chemical process pump design offers a multitude of benefits, making it a preferred choice for various operations.
Enjoy effortless maintenance with the long coupled configuration, allowing pump head access without the hassle of motor removal.
Built to withstand rigorous use, this process pump is reinforced with additional bearings in the pump head, significantly reducing motor strain during operation, ensuring durability and reliability.
Thanks to the innovative back pull-out design, the motor can be removed without detaching the pump from the pipework, streamlining the servicing process and saving precious time.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement upon breakage. This is a key advantage over less robust models that necessitate full motor replacement if the shaft fails.
The long coupled design ensures ample space between pump and motor, providing a safeguard against fluid ingress in case of seal failure, thus protecting the motor.
Product Summary
• Expertly pumps a diverse range of clean low-viscosity or mildly contaminated fluids with ease.
• Choose between closed or semi-open impeller configurations.
• Enjoy swift and simple maintenance with our back pull-out design.
• Handles fluid temperatures soaring up to 175°C without compromise.
• Heavy-duty shaft construction ensures no fluid contact, enhancing longevity.
• Benefit from an optional external seal cooling system to optimize performance.
• Features separate shafts for pump and motor, enhancing operational efficiency.
• Available in robust materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 with steel and stainless steel casings conforming to EN 1092-1 / PN 16.
• Multiple sealing options including gland packing, and single, double, and cartridge mechanical seals are available.
• Equipped with three-phase 50Hz / 60Hz motors, IP55 as standard for optimal operation.
• ATEX versions are available upon request for enhanced safety.
• Independent certification can be obtained upon request, ensuring compliance and quality assurance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, guaranteeing quality.
• Designed for low NPSH, ensuring efficient operation.
• Simplified assembly process requiring no alignment, facilitating quick installation.
• All impellers are precision-balanced in accordance with ISO 1940 class 6.3 for optimal performance.
• Long coupled with an integrated baseplate for added stability and ease of use.
• Capable of accommodating an API Seal, conforming to API682 standards for enhanced sealing solutions.
• 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 and chemical pumps proudly incorporate renowned brand bearings, promising exceptional longevity that thrives even amidst the most challenging environments.
To adeptly balance axial thrust, most impellers feature wear rings both at the front and back, complemented by a precision-engineered balance hole situated on the back shroud. In certain pumps where axial thrust remains minimal, the design omits the wear ring and balance hole at the rear, optimizing performance.
The high-precision casting of our impellers guarantees unparalleled performance, crafted meticulously in premium materials such as cast iron, stainless steel, and bronze.
A Closer Look at Two Principal Groups:
1) "Flush" - A method where clean, cool liquid is injected into the seal chamber enhances the operating conditions. An additional smaller port, strategically positioned downward, often serves as a leakage observation point or a vent outlet.
2) "Barrier or Buffer" for dual seals - This innovative system introduces a secondary fluid between two mechanical seals, preventing ambient air from contacting the pumped fluid, improving seal cooling, and significantly enhancing safety.
Notably, many mechanical seals operate efficiently without the need for specialized external flush arrangements.
Innovative Connectivity: Flexible Couplings
Unlike their rigid counterparts, flexible couplings excel at accommodating movement like vibrations and thermal expansion without sustaining damage, making them ideal for scenarios with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations also contributes to noise reduction, although their sophisticated design translates to a higher cost. Nevertheless, flexible couplings offer considerable maintenance savings by safeguarding the shaft and bearings from damage and premature wear.
Semhai's API standard chemical pumps are equipped with API 671 Standard Disc Couplings, ensuring robust performance.
This design delivers lower reaction loads and superior balancing quality than standard couplings, boosting efficiency and effectiveness across the entire power transmission of the pump.
| 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 esteemed domestic pump-testing institutions, ensuring that our products meet rigorous quality standards and conform to industry excellence. These collaborations enable us to continuously innovate and refine our offerings.
Among the prestigious entities we work with is the renowned National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang city. This facility is revered for its stringent assessments and unparalleled expertise.
Another notable partner is the Irrigation Machinery Products Quality Inspection Center in Zhenjiang City. Known for their meticulous evaluations, their contributions help us maintain our commitment to top-notch quality and reliability.
We also collaborate with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing city, which is instrumental in ensuring our pumps perform optimally in agricultural settings.
Furthermore, the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai city stands as a testament to our dedication to excellence, providing us with comprehensive testing and quality assurance services.
Audited Supplier 
){kind=link}