Introducing the SLZ End Suction, Long Coupled, Single Stage Centrifugal Chemical Process Pump, the epitome of industrial excellence! Engineered to meet the rigorous EN 22858 / ISO 2858 standards, this versatile pump is the perfect solution for a myriad of applications across the industrial and marine sectors. Designed to deliver optimal performance, it efficiently handles low viscosity clean or slightly contaminated fluids, ensuring they remain free from solid or fibrous contaminants. Whether it's fresh water, sea water, diesel, petrol, or kerosene, this pump excels in fluid transfer, making it an ideal choice for fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, treatment and pressurization, as well as for grey water management, dewatering, and marine applications.
This powerhouse of a centrifugal chemical process pump is built for large-scale operations, offering high flow and high-pressure capabilities. Its heavy-duty design ensures it can handle the most demanding tasks with ease.
The innovative long coupled centrifugal chemical process pump design offers numerous advantages that set it apart from the competition.
With its long coupled configuration, maintenance becomes a breeze, allowing easy access to the pump head without the need to remove the motor, ensuring minimal downtime and maximum productivity.
Designed for endurance and reliability, this robust process pump is equipped with additional bearings in the pump head, significantly reducing strain on the motor during operation, making it perfect for continuous use.
Featuring a back pull out design, the motor can be effortlessly removed while keeping the pump connected to the pipework, optimizing maintenance time and boosting efficiency.
The centrifugal chemical process pump boasts independent shafts for the pump and motor, meaning only the pump shaft requires replacement if damaged. This stands in stark contrast to less durable models where a broken shaft necessitates full motor replacement.
The thoughtfully engineered long coupled design creates ample space between the pump and motor, safeguarding the motor from potential fluid ingress should a seal failure occur, thus enhancing durability and longevity.
Product Summary
• Masterfully pumps a diverse array of clean, low viscosity, or slightly contaminated fluids, ensuring clarity and performance.
• Choose between a closed or semi-open impeller to suit your specific needs.
• The back pull out design guarantees swift and easy maintenance, minimizing disruption.
• Operates efficiently with a maximum fluid temperature of up to 175°C, catering to high-temperature applications.
• Durable, heavy-duty shaft designed to remain free from fluid contact, ensuring extended lifespan.
• Optional external seal cooling system available to enhance performance under demanding conditions.
• Independent pump and motor shafts for easy and cost-effective maintenance.
• Available in a multitude of 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 EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers a variety of sealing options including gland packing, and single, double, and cartridge mechanical seals to suit diverse operational needs.
• Equipped with three-phase motors in both 50Hz and 60Hz, featuring IP55 protection as standard for reliable performance.
• ATEX-compliant versions available upon request for hazardous environments.
• Independent certification can be obtained upon request, assuring quality and compliance.
• Expertly manufactured to meet the stringent EN 22858 / ISO 2858 standards, ensuring unparalleled quality.
• Low NPSH guarantees efficient operation even under challenging conditions.
• Assembly without alignment facilitates quick setup and seamless integration.
• All impellers are meticulously balanced according to ISO 1940 class 6.3, ensuring smooth and efficient operation.
• Long coupled with a robust baseplate, providing stability and durability in demanding applications.
• Option to install an API Seal in accordance with API682, offering enhanced sealing performance.
• Features oil-lubricated ball bearings for superior reliability and longevity.
| 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 proudly incorporate world-renowned brand bearings, ensuring unparalleled durability and extending pump life, even under the most challenging conditions.
To expertly manage axial thrust, most impellers feature wear rings at both the front and back, complemented by a balance hole on the back shroud. For pumps where axial thrust is minimal, the rear wear ring and balance hole become unnecessary, optimizing design.
Our high-precision cast impellers guarantee peak performance, available in robust materials such as cast iron, stainless steel, and bronze, tailored to meet diverse operational demands.
There are generally two main groups:
1) "Flush" - This method introduces clean, cool liquid into the seal chamber, enhancing the operational environment. A secondary, typically downward-facing port often functions as a leakage monitor or vent, ensuring reliability.
2) "Barrier or Buffer" for dual seals - A secondary fluid is introduced between two mechanical seals to prevent air contact with the pump fluid, bolster seal cooling, and heighten safety.
Importantly, not every mechanical seal necessitates specialized external flush arrangements, simplifying system requirements.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, accommodate movement such as vibrations and thermal expansion. This flexibility makes them perfect for scenarios with unavoidable misalignment between drive and pump shafts. They excel in absorbing vibrations, thereby reducing noise and offering longevity by protecting shafts and bearings, despite their complex and costly design. Long-term maintenance savings are a significant advantage.
Semhai's API standard chemical pumps feature top-tier API 671 Standard Disc Couplings, epitomizing reliability.
These couplings deliver reduced reaction loads while offering superior balancing quality, enhancing 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 forged enduring partnerships with prominent domestic pump-testing authorities, exemplifying a commitment to excellence and reliability. Our collaborative efforts with renowned institutions include:
The National Quality Supervision and Inspection Center for Industrial Pumps situated in Tiexi District, Shenyang City,
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial located in Zhenjiang City,
The Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City,
And the esteemed Shanghai Mechanical and Electrical Products Quality Inspection Center, found in Shanghai City, among others.
Audited Supplier 
){kind=link}