The SLZ end suction, long coupled, single stage centrifugal chemical process pump is meticulously standardized to EN 22858 / ISO 2858, ensuring exceptional quality and reliability. This versatile marvel is suitable for a vast array of industrial and marine applications. Designed to efficiently manage low viscosity clean or slightly contaminated fluids, it excels in scenarios devoid of solid or fibrous contaminants. Ideal for handling fresh water, sea water, and various fuels like diesel, petrol, and kerosene, its robust design supports essential functions like fuel transfer, chemical processing, energy plants operations, mining tasks, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine use.
Introducing a powerhouse in fluid transfer - a large, heavy duty centrifugal chemical process pump designed to deliver high flow and pressure capabilities, making it perfect for demanding industrial scenarios.
The long coupled centrifugal chemical process pump design offers a myriad of benefits, ensuring seamless operations and maintenance.
Thanks to its innovative long coupled configuration, maintenance is a breeze as you can effortlessly access the pump head without the need to remove the motor.
Engineered for endurance, this process pump is exceptionally robust and built for continuous operation, equipped with additional bearings in the pump head to significantly reduce motor strain during use.
The back pull out design is a game-changer, allowing for the motor to be easily removed while the pump remains attached to the pipework, thereby optimizing time efficiency during servicing and maintenance.
Featuring independent shafts for the centrifugal chemical process pump and motor, this ensures that in the unfortunate event of pump shaft breakage, only the pump shaft requires replacement, unlike less durable alternatives that necessitate complete motor replacement when the motor shaft fails.
The long coupled design advantageously positions a significant gap between the pump and motor, safeguarding the motor from potential damage due to fluid ingress in seal failure scenarios.
Product Summary
• Capable of efficiently pumping a diverse range of clean, low viscosity, or slightly contaminated fluids, this pump is highly versatile.
• Available with the choice of closed or semi-open impeller, catering to various operational needs.
• The back pull out design ensures maintenance is quick, easy, and hassle-free.
• Capable of withstanding a maximum fluid temperature of 175°C, suitable for high-temperature applications.
• The heavy duty shaft design ensures it remains unaffected by fluid contact, enhancing longevity and reliability.
• Comes with an external seal cooling system option to maintain optimal operating conditions.
• Independent pump and motor shafts provide operational resilience and ease of maintenance.
• Constructed from a selection of robust materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with additional materials available upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with options for steel and stainless steel casings meeting EN 1092-1 / PN 16.
• Offers gland packing or a range of mechanical seal options including single, double, and cartridge variants.
• Equipped with three phase 50hz / 60hz motors, featuring IP55 as standard, suitable for various industry requirements.
• ATEX compliant version available upon request, ensuring safety in explosive atmospheres.
• Independent certification is available upon request, assuring you of its quality and performance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, guaranteeing superior quality and reliability.
• Low NPSH design ensures efficient operation by minimizing cavitation risks.
• Designed for assembly without alignment, simplifying installation processes.
• All impellers are meticulously balanced according to ISO 1940 class 6.3, ensuring smooth and efficient pump operation.
• Long coupled with a sturdy baseplate, ensuring stability and enduring performance.
• Option to install an API Seal in accordance with API682, catering to specific industry requirements.
• Equipped with oil-lubricated ball bearings, enhancing durability and reducing maintenance needs.
| 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 feature renowned brand bearings, ensuring exceptional durability and longevity even under the most demanding conditions. Experience unparalleled service life with our meticulously crafted pumps.
To effectively balance axial thrust, most impellers are equipped with both front and rear wear rings, complemented by a balance hole on the back shroud. In cases where the axial thrust is minimal, the impeller design omits the rear wear ring and balance hole, ensuring optimal efficiency without compromise.
Our impellers, crafted with high-precision casting, guarantee superior performance. Available in materials such as cast iron, stainless steel, and bronze, these impellers are designed to meet the highest standards of quality and durability.
There are generally two main groups for sealing solutions:
1) "Flush" - This method involves introducing a clean, cool liquid into the seal chamber, optimizing the operating environment. A secondary, typically downward-oriented port provides a convenient opening for leakage observation or venting, enhancing maintenance and safety.
2) "Barrier or Buffer" for dual seals - A secondary fluid circulates between two sets of mechanical seals, preventing ambient air from interacting with the pumped fluid. This improves seal cooling and boosts overall safety, making it a crucial choice for high-demand operations.
It's important to note that not all mechanical seals require special external flush arrangements, allowing for greater flexibility in pump operation and maintenance.
Flexible couplings
Flexible couplings, as opposed to their rigid counterparts, can handle movement such as vibrations and thermal expansion without sustaining damage. Ideal for applications with unavoidable misalignment, they effectively absorb vibrations, thus reducing operational noise. While their complex design entails higher costs, they offer long-term savings by safeguarding the shaft and bearings from wear, ensuring extended service life.
The Semhai API standard chemical pumps incorporate API 671 Standard Disc Couplings, setting a benchmark in reliability and performance.
These couplings deliver lower reaction loads and superior balancing quality compared to ordinary couplings, enhancing the overall efficiency and effectiveness of pump power transmission.
| 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 and robust collaboration with a selection of esteemed, large-scale domestic pump-testing institutions, ensuring the highest standards of quality and reliability. These include:
The National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City, renowned for its state-of-the-art testing protocols,
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, celebrated for its meticulous inspection procedures,
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, esteemed for its comprehensive quality assurance measures,
And finally, the Shanghai Mechanical and Electrical Products Quality Inspection Center situated in Shanghai City, recognized for its rigorous evaluation of mechanical and electrical products, amongst others.
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