Introducing the SLZ end suction, long-coupled, single-stage centrifugal chemical process pump, meticulously engineered and standardized to EN 22858 / ISO 2858. This versatile pump is your go-to solution for myriad applications across the industrial and marine sectors. Crafted to perfection, it efficiently handles low viscosity clean or slightly contaminated fluids, free from solid or fibrous matter. Its prowess extends to pumping fresh water, sea water, and fuels such as diesel, petrol, and kerosene. Perfectly suited for applications like fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, treatment, pressurization, grey water management, dewatering, and marine use.
Discover the power of our large, heavy-duty centrifugal chemical process pump, designed to deliver exceptional high flow and high pressure performance.
Explore the abundant advantages of our long-coupled centrifugal chemical process pump design.
Experience effortless maintenance with our long-coupled configuration, enabling easy access to the pump head without motor removal.
Engineered for endurance, this robust process pump is built for continuous operation, featuring additional bearings in the pump head that alleviate motor strain during use.
The innovative back pull-out design facilitates motor removal while keeping the pump connected to pipework, streamlining service and maintenance for optimum time efficiency.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement if damaged. Contrastingly, less durable market options rely on the motor shaft, risking full motor replacement upon shaft failure.
Our long-coupled design strategically positions ample space between the pump and motor, safeguarding the motor from fluid ingress even in the event of a seal failure.
Product Summary
• Capable of pumping a diverse range of clean, low viscosity, or slightly contaminated fluids with precision.
• Offered with your choice of closed or semi-open impellers to suit your specific needs.
• Features a back pull-out design to ensure swift and hassle-free maintenance.
• Handles maximum fluid temperatures reaching an impressive 175°C.
• Heavy-duty shaft engineered to remain out of contact with fluids, ensuring longevity.
• Equipped with an external seal cooling system for enhanced performance.
• Boasts independent pump and motor shafts for easy and cost-effective maintenance.
• Available in durable materials such as cast iron, 316 stainless steel, duplex stainless steel, bronze, and custom materials upon request.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with EN 1092-1 / PN 16 flanges for steel and stainless steel casings.
• Offers flexible sealing options, including gland packing as well as single, double, and cartridge mechanical seals.
• Comes with robust three-phase 50hz / 60hz motors, IP55 standard, ensuring reliable performance.
• ATEX-certified versions available upon request for operations in explosive atmospheres.
• Independent certification available to meet your specific regulatory requirements.
• Manufactured in strict compliance with EN 22858 / ISO 2858 standards, ensuring quality and reliability.
• Features low NPSH characteristics for superior pump performance.
• Designed for assembly without alignment, simplifying setup and maintenance.
• All impellers are meticulously balanced according to ISO 1940 class 6.3 standards for optimal performance.
• Long-coupled with a stable baseplate for enhanced stability and ease of installation.
• Equipped to install an API Seal, adhering to API682 standards for top-tier sealing solutions.
• Features oil-lubricated ball bearings for smooth, efficient, and durable 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 boast the use of prestigious brand bearings, ensuring a remarkably extended service life even when faced with the most demanding and harsh operational conditions.
To expertly balance axial thrust, most of our impellers feature wear rings both at the forefront and rear, along with a strategically placed balance hole on the impeller's back shroud. Some pumps, however, sport a minimal axial thrust, eliminating the need for a rear wear ring and balance hole.
Our high-precision cast impellers promise superior performance and are available in a range of robust materials including cast iron, stainless steel, and bronze.
Typically, our offerings are categorized into two principal groups:
1) "Flush" - This method involves injecting a clean, cool liquid into the seal chamber to enhance the operating environment. A secondary, smaller port is usually oriented downward and serves as a leak observation or venting outlet.
2) "Barrier or Buffer" for dual seals - A secondary fluid is introduced into the space between two mechanical seals to prevent ambient air contact with the pumped fluid, thus improving seal cooling and amplifying overall safety.
It's noteworthy that certain mechanical seals do not necessitate specialized external flush arrangements.
Flexible couplings
Distinct from rigid couplings, flexible couplings are engineered to accommodate movement such as vibrations and thermal expansion without incurring damage. This feature makes them particularly suited for scenarios involving minor misalignment between drive and pump shafts. Their ability to absorb vibrations also serves to mitigate excessive operational noise. While their design is more intricate and costly, the long-term maintenance savings they offer by safeguarding shafts and bearings from damage and early wear are significant.
Our Semhai API standard chemical pumps are equipped with the advanced API 671 Standard Disc Couplings.
These couplings exhibit lower reaction loads and superior balancing quality compared to standard couplings, significantly boosting the efficiency and efficacy 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 |
Esteemed Professional Cooperation Agencies
Our company, Shanghai Semhai Pump Co., Ltd., has forged enduring partnerships with numerous prestigious domestic pump-testing institutions. Our commitment to excellence and quality is showcased through these collaborations with highly regarded entities, such as:
The renowned National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang city, is a testament to our dedication to high standards.
We collaborate closely with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, further ensuring the superior performance of our offerings.
Partnership with the Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, situated in Chongqing city, underscores our relentless pursuit of reliability and efficiency.
Our alliance with the Shanghai Mechanical and Electrical Products Quality Inspection Center, based in Shanghai city, represents our commitment to innovation and excellence. These collaborations are pivotal to our promise of quality assurance.
Audited Supplier 
){kind=link}