The SLZ end suction, long coupled, single stage centrifugal chemical process pump stands as a paragon of precision, adhering to rigorous EN 22858 / ISO 2858 standards. This versatile workhorse is perfectly suited for a myriad of applications across industrial and marine sectors. It seamlessly handles low viscosity clean or slightly contaminated fluids, deftly excluding fibrous and solid particulates. Whether it's the transfer of fresh or sea water, fuels like diesel, petrol, and kerosene, or operational roles in fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurisation, grey water management, dewatering, and marine applications, this pump excels with aplomb.
Introducing a large, heavy-duty centrifugal chemical process pump, engineered for unparalleled high flow and pressure performance, setting new benchmarks in operational excellence.
The long coupled centrifugal chemical process pump design offers an array of significant benefits that elevate its functionality and ease of use.
Experience effortless maintenance with the long coupled configuration, designed for seamless access to the pump head without the need for motor detachment, ensuring minimal downtime and maximum convenience.
This process pump is synonymous with robustness and resilience, crafted for relentless, continuous operation. Enhanced with additional bearings in the pump head, it alleviates the motor's operational stress, promising longevity and dependable performance.
Boasting a back pull out design, this pump ensures the motor can be easily removed while the pump remains connected to the pipework, providing significant time savings during service and maintenance intervals.
With independent shafts for the pump and motor, replacement of the pump shaft (if needed) is straightforward and cost-effective. Unlike less robust alternatives, where a motor shaft break necessitates full motor replacement, this design prioritizes efficiency and sustainability.
The long coupled design introduces generous spacing between pump and motor, safeguarding the motor against potential fluid ingress in the event of a seal failure, thereby ensuring operational integrity.
Product Summary: Discover an engineering masterpiece that combines versatility, durability, and advanced features for unmatched performance.
• Masterfully pumps an extensive range of clean, low viscosity or slightly contaminated fluids with precision.
• Available with options of closed or semi-open impeller to suit various application needs.
• The back pull out design guarantees swift and straightforward maintenance, minimizing operational interruptions.
• Engineered to withstand a maximum fluid temperature of 175°C, ensuring high-temperature resilience.
• Features a heavy-duty shaft strategically designed to avoid contact with the fluid, enhancing durability.
• Equipped with an external seal cooling system, providing superior operational efficiency.
• Innovative design with independent pump and motor shafts for simplified maintenance and repair.
• Constructed in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with bespoke options available on 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.
• Offers a selection of sealing options including gland packing, as well as single, double, and cartridge mechanical seals.
• Available with three-phase 50Hz / 60Hz motors, with IP55 rating as standard for enhanced protection.
• ATEX version is offered upon request, ensuring compliance with explosive atmospheres directives.
• Independent certification accessible upon request, validating quality and performance.
• Manufactured to rigorous EN 22858 / ISO 2858 standards, ensuring superior quality and reliability.
• Low NPSH requirement for optimal operation in diverse conditions.
• Allows for assembly without alignment, simplifying installation and reducing setup time.
• All impellers are precisely balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long coupled with baseplate for enhanced stability and performance.
• Option to install an API Seal conforming to API682, enhancing safety and reliability.
• Utilizes oil-lubricated ball bearings, ensuring smooth operation and extended lifespan.
| 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 equipped with renowned brand bearings, ensuring unparalleled durability and longevity, even when faced with the most challenging working conditions.
To masterfully balance axial thrust, many of our impellers are engineered with precision wear rings at both the front and rear, complemented by a strategically placed balance hole on the back shroud. However, in cases where axial thrust is minimized, the necessity for a rear wear ring and balance hole is elegantly eliminated.
Crafted with high-precision casting, our impellers are designed to guarantee optimal performance. Available in robust materials such as cast iron, stainless steel, and bronze, they promise reliability and strength.
We categorize them into two primary groups:
1) "Flush" System - A pristine, cooling liquid is meticulously introduced into the seal chamber, enhancing the operational environment. An additional, smaller port, usually directed downward, serves as an observation or venting point for leakage.
2) "Barrier or Buffer" with Dual Seals - A secondary fluid is expertly delivered to the space between two mechanical seals, effectively preventing ambient air from interacting with the pumped fluid. This not only enhances seal cooling but also elevates safety standards.
It's noteworthy that not every mechanical seal requires specialized external flush setups.
Innovative Flexible Couplings
Flexible couplings, unlike their rigid counterparts, offer the advantage of accommodating movement such as vibrations and thermal shifts without sustaining damage. Ideal for situations where some degree of shaft misalignment is inevitable, they excel in absorbing vibrations, thereby reducing operational noise. Although they come with a more intricate and costly design, the long-term benefits of protecting shafts and bearings from damage and premature wear translate into significant maintenance savings.
Our Semhai API standard chemical pumps are enhanced with the precision of API 671 Standard Disc Couplings.
These couplings are engineered to deliver remarkably lower reaction loads, superior balancing quality, and a significant boost in overall pump power transmission efficiency and effectiveness.
| 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 proudly forged enduring partnerships with several esteemed and prominent domestic pump-testing institutions. These alliances have helped ensure that our products meet the highest standards of quality and reliability.
We collaborate with the prestigious National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang city. This esteemed center is renowned for its rigorous testing procedures and quality assurance.
Our esteemed partners include the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, which is well-known for its meticulous quality inspection services in irrigation machinery.
We work closely with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing city, a leading authority in agricultural pump quality assurance and performance evaluation.
Our collaboration extends to the Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai city, which is highly recognized for its comprehensive quality assessments and testing expertise.
Audited Supplier 
){kind=link}