Introducing the SLZ end suction, long coupled, single-stage centrifugal chemical process pump, a gold standard in pumping solutions crafted to EN 22858 / ISO 2858 specifications. Ideal for an array of industrial and marine applications, this pump excels in moving low viscosity clean or slightly contaminated fluids, effectively handling fresh water, sea water, and fuels such as diesel, petrol, and kerosene. Perfectly suited for tasks involving fuel transfer, chemical processing, energy plants, mining operations, firefighting, irrigation, water supply and treatment, pressurization systems, grey water management, dewatering, and marine applications.
Discover unparalleled power with this robust, heavy-duty centrifugal chemical process pump. Designed for high flow and high pressure scenarios, it sets a new benchmark in efficiency and reliability.
The intelligently engineered long coupled centrifugal chemical process pump design offers a multitude of advantages, ensuring seamless operation and maintenance.
Experience unmatched ease of maintenance with the long coupled configuration, which allows straightforward access to the pump head without the need to detach the motor.
Built for endurance, this process pump boasts a sturdy construction, designed for relentless operation. Additional bearings in the pump head significantly reduce motor strain, enhancing longevity.
The innovative back pull out design enables motor removal while the pump remains connected to the pipework, maximizing efficiency and minimizing downtime during servicing and maintenance.
Featuring independent shafts for pump and motor, this pump ensures cost-effective repairs. In the unlikely event of a shaft failure, only the pump shaft needs replacement, unlike other designs that necessitate entire motor replacement.
The long coupled design smartly positions a generous space between the pump and motor, shielding the motor from fluid ingress during seal failures, thus enhancing operational safety.
Product Summary
• Efficiently pumps a vast range of clean, low viscosity or slightly contaminated fluids with precision and reliability.
• Offers flexibility with closed or semi-open impeller options to suit diverse operational needs.
• Features a back pull out design for swift, hassle-free maintenance to minimize downtime.
• Engineered to handle fluids at temperatures up to 175°C, catering to challenging environments.
• Heavy-duty shaft designed to remain untouched by the fluid, ensuring durability and performance.
• Comes with an external seal cooling system for enhanced operational efficiency.
• Independent pump and motor shafts offer robust performance and easy maintenance.
• Available in durable materials like cast iron, 316 stainless steel, duplex stainless steel, and bronze, with additional materials available upon request for tailored solutions.
• Suction and discharge flanges built to EN 1092-2 / PN 16 standards, with steel and stainless steel casings conforming to EN 1092-1 / PN 16.
• Offers a variety of sealing options, including gland packing or single, double, and cartridge mechanical seals, to meet diverse application requirements.
• Equipped with three-phase 50hz / 60hz motors, standardly rated at IP55, for reliable, high-performance operation.
• ATEX version available upon request, ensuring safety in potentially explosive atmospheres.
• Independent certification available upon request, guaranteeing adherence to stringent quality standards.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring global compatibility and reliability.
• Features a low NPSH design for improved suction performance and reduced cavitation risk.
• Simplified assembly without alignment requirements, streamlining installation processes.
• All impellers meticulously balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long coupled with a robust baseplate for enhanced stability and performance during operation.
• Capable of accommodating an API Seal, fully compliant with API 682 standards, for superior sealing performance.
• Incorporates oil-lubricated ball bearings for reduced friction 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 |
Renowned brand bearings are an integral component of our centrifugal and chemical pump series, ensuring a prolonged lifespan even amidst challenging operational conditions.
To achieve optimal axial thrust balance, our design incorporates wear rings positioned at the forefront and rear of most impellers, complemented by a balance hole on the impeller's back shroud. For pumps with minimal axial thrust, the need for a rear wear ring and balance hole is eliminated, streamlining design without compromising efficiency.
Our high-precision casting impellers guarantee unparalleled performance, crafted from premium materials like cast iron, stainless steel, and bronze.
We categorize our solutions into two primary segments:
1) "Flush" - This method involves the introduction of a clean, cooling liquid into the seal chamber, optimizing the operating environment. An additional, smaller port is strategically oriented downward, often utilized for leakage monitoring or as a venting point.
2) "Barrier or Buffer" with dual seals - This technique employs a secondary fluid circulated in the interspace between dual mechanical seals. Its purpose is to avert ambient air from mingling with the pumped fluid, enhance seal cooling, and elevate safety standards.
It's noteworthy that numerous mechanical seals function seamlessly without necessitating specific external flush systems.
Adaptable Couplings
In contrast to rigid couplings, flexible couplings are engineered to tolerate slight movements, such as vibrations and thermal expansions, without incurring damage. They are particularly advantageous in applications where some degree of misalignment between drive and pump shafts is unavoidable. Their vibration absorption capabilities also contribute to noise reduction during operations. Despite their intricate and costly design, flexible couplings offer substantial maintenance savings over time by safeguarding shafts and bearings from potential damage and early wear.
Semhai's API standard chemical pumps are equipped with API 671 Standard Disc Couplings.
This design showcases reduced reaction loads alongside superior balancing quality compared to conventional couplings, thereby enhancing the overall efficiency and effectiveness of the pump's 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 cultivated robust and enduring partnerships with numerous prestigious domestic pump-testing institutions and agencies. These collaborations ensure that our products meet the highest standards of quality and performance.
Among these esteemed partners is the National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City—an authority in pump quality assurance.
We also partner with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, renowned for its rigorous quality checks and industry expertise.
Further strengthening our credentials, we work with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center, based in Chongqing City, a leading body in agricultural pump evaluation.
Our network extends to the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, among others, demonstrating our commitment to excellence and reliability in product quality.
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