Introducing the SLZ end suction, long-coupled, single-stage centrifugal chemical process pump! Crafted to meet the stringent standards of EN 22858 / ISO 2858, this marvel caters to a diverse array of applications across industrial and marine markets. This pump is engineered to handle low viscosity clean or slightly contaminated fluids, devoid of solid or fibrous content. It effortlessly manages common liquids like fresh and sea water, as well as fuels such as diesel, petrol, and kerosene. The SLZ pump shines in applications like fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, treatment, pressurization, grey water treatment, dewatering, and marine uses.
Standing as a titan in its class, this centrifugal chemical process pump is a robust, heavy-duty powerhouse, boasting high flow and pressure capabilities that make it second to none.
The strategic long-coupled design of this centrifugal chemical process pump brings numerous advantages that elevate performance and reliability.
Ease of maintenance is a hallmark of the long-coupled configuration, allowing seamless access to the pump head without necessitating motor removal.
Engineered for endurance, this process pump is fortified for continuous operation. Additional bearings in the pump head effectively diminish motor strain during function.
Thanks to its back pull-out design, servicing is a breeze as the motor can be detached while the pump remains connected to the pipework, significantly conserving time.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement should it fail, unlike lesser models where a motor shaft failure mandates total motor replacement.
The long-coupled design introduces ample space between pump and motor, shielding the motor from fluid ingress in the event of seal failure.
Product summary
• Capable of pumping a vast range of clean, low viscosity, or slightly contaminated fluids with ease.
• Choose between closed or semi-open impeller options tailored to your needs.
• Back pull-out design ensures maintenance is both swift and straightforward.
• Handles maximum fluid temperatures up to a scorching 175°C.
• A robust shaft that never contacts the fluid, ensuring longevity and reliability.
• Optional external seal cooling system available for optimal temperature control.
• Distinctive independent pump and motor shafts for minimized maintenance woes.
• Available in materials like cast iron, 316 stainless steel, duplex stainless steel, and bronze, with custom options upon request.
• 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.
• Choose from gland packing, single, double, and cartridge mechanical seal options to suit your needs.
• Three-phase motors available in 50hz / 60hz, with IP55 as the standard configuration.
• ATEX-certified versions available on request for specialized environments.
• Request independent certification for added assurance in quality and performance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring peak performance.
• Features low NPSH to optimize pump efficiency and reliability.
• Assembly is effortless and requires no alignment, enhancing user convenience.
• All impellers are precision-balanced to ISO 1940 class 6.3 standards, ensuring smooth operation.
• Long-coupled design complete with a sturdy baseplate for secure installation.
• Option to install an API Seal, compliant with API682 standards for enhanced sealing solutions.
• Oil-lubricated ball bearings are incorporated for extended durability and reduced maintenance.
| 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 renowned for incorporating premium brand bearings, ensuring exceptional durability and reliability even in the most challenging environments. Expect a prolonged service life from our pumps, meticulously crafted to withstand tough conditions.
To expertly balance axial thrust, our pumps feature meticulously designed wear rings both at the front and back of most impellers. The balance hole, strategically positioned on the back shroud, plays a crucial role. In pumps where axial thrust is minimal, these components are ingeniously omitted to enhance efficiency.
The high-precision casting of our impellers guarantees superior performance. Crafted from materials like cast iron, stainless steel, and bronze, each impeller is engineered to meet the highest standards of quality and resilience.
There are generally two main groups:
1) "Flush" - A technique where clean, cool liquid is skillfully introduced into the seal chamber to optimize the operating conditions. An additional smaller port, typically downward-facing, serves dual purposes: leakage monitoring and venting.
2) "Barrier or Buffer" for dual seals - This involves supplying a secondary fluid to the inter-seal space, effectively preventing ambient air intrusion into the pumped fluid. This not only enhances cooling but also significantly boosts safety.
It's noteworthy that not all mechanical seals necessitate special external flush arrangements, offering flexibility and efficiency in various applications.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, are designed to gracefully accommodate movements such as vibrations and thermal expansion. Ideal for scenarios with inevitable misalignment, these couplings absorb vibrations effectively, reducing operational noise. Despite a more intricate and costly design, they offer long-term savings by preventing damage and premature wear to shafts and bearings.
Semhai's chemical pumps adhere to API standards, utilizing the advanced API 671 Standard Disc Couplings for superior performance.
These couplings stand out with lower reaction loads and superior balancing quality compared to standard couplings, significantly boosting the efficiency and effectiveness of the entire pump power transmission system.
| 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 skillfully fostered enduring partnerships with a multitude of prestigious domestic pump-testing institutions, enhancing their industry reputation and ensuring the highest quality standards. These collaborations include:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, is a testament to our commitment to excellence.
Our alliance with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City further solidifies our dedication to quality assurance in the industry.
In collaboration with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, we continue to uphold our promise of reliability.
Partnering with the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, among others, highlights our commitment to maintaining top-tier quality across our product range.
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