Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump—an engineering marvel standardized to EN 22858 / ISO 2858. This versatile powerhouse is perfectly suited for a spectrum of industrial and marine market applications. Seamlessly designed, it is ideal for transporting low viscosity fluids—whether clean or slightly contaminated—free from solid or fibrous elements. Its robust capabilities successfully handle fluids such as fresh water, sea water, and various fuels including diesel, petrol, and kerosene. From fuel transfer to chemical processing, energy plants to mining, and fire fighting to irrigation, its potential stretches far and wide. Whether it’s water supply, treatment, pressurization tasks, grey water management, dewatering activities, or marine applications, this pump stands at the pinnacle of reliability and performance.
This exceptional centrifugal chemical process pump is engineered for heavy-duty applications, boasting impressive high flow and high pressure capabilities.
Revel in the innovative design of our long coupled centrifugal chemical process pump, offering numerous operational advantages that set it apart from the rest.
The ingenious long coupled configuration ensures effortless maintenance by allowing easy access to the pump head without necessitating motor removal.
Built for endurance, this process pump features a robust design primed for continuous operation. Additional bearings in the pump head significantly reduce motor strain, enhancing durability.
Thanks to the intuitive back pull-out design, the motor can be detached while the pump remains connected to the pipework, facilitating substantial time savings during service or maintenance activities.
Engineered with separate shafts for the centrifugal chemical process pump and the motor, this design ensures only the pump shaft requires replacement if damaged. Unlike less durable alternatives which integrate the motor shaft, necessitating full motor replacement upon shaft failure.
The strategic long-coupled design introduces a considerable gap between the pump and motor, effectively safeguarding the motor from fluid intrusion in the event of a seal failure.
Product Summary
• Capable of processing a diverse array of clean, low viscosity, or slightly contaminated fluids with ease.
• Comes with options for closed or semi-open impellers to suit varying operational needs.
• Incorporates a back pull-out design to facilitate rapid and straightforward maintenance procedures.
• Designed to withstand maximum fluid temperatures up to an impressive 175°C.
• Features a heavy-duty shaft engineered to avoid contact with the fluid, ensuring longevity.
• An external seal cooling system is available to maintain optimal operating conditions.
• Maintains independent pump and motor shafts for enhanced reliability and ease of maintenance.
• Available in materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, tailored to your specific requirements.
• 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 versatile sealing options including gland packing, single, double, and cartridge mechanical seals.
• Equipped with three-phase motors operating at 50Hz / 60Hz. IP55 standard ensures robust performance.
• Available in an ATEX version to meet specific safety requirements upon request.
• Independent certification can be arranged to meet your quality assurance needs.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards for unparalleled quality.
• Designed with low NPSH to enhance operational efficiency.
• Assembly is simplified due to the lack of need for alignment, streamlining setup processes.
• All impellers are precision-balanced in alignment with ISO 1940 class 6.3 standards for optimum performance.
• Long coupled with a robust baseplate to ensure stability and reliability.
• API Seal installation available, conforming to API682 standards for superior sealing performance.
• Features oil-lubricated ball bearings designed to maximize longevity and efficiency.
| 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 incorporation of renowned brand bearings, ensuring exceptional durability and reliability, even under the most demanding conditions. This results in an extended lifespan, providing peace of mind and efficient performance across a range of applications.
To expertly manage axial thrust, our design includes front and rear wear rings on most impellers, complemented by a balance hole on the impeller's back shroud. For pumps where axial thrust is minimal, the necessity for rear wear rings and balance holes is eliminated, optimizing simplicity and efficiency.
Our high-precision casting impellers are engineered to deliver superior performance. Available in materials such as cast iron, stainless steel, and bronze, these impellers ensure optimal functionality and durability, tailored to withstand the rigors of chemical applications.
Our products are generally categorized into two primary groups:
1) "Flush" - Enhancing seal integrity, a clean, cool fluid is injected into the seal chamber, improving the operating environment. A secondary, downward-orientated port serves as a leakage observer or vent, facilitating maintenance and operational efficiency.
2) "Barrier or Buffer" with dual seals - This innovative design introduces a secondary fluid between two mechanical seals, preventing ambient air from infiltrating the pumped fluid. This not only boosts seal cooling but also elevates safety standards, ensuring flawless operation.
It's important to note that not every mechanical seal necessitates specialized external flush setups, highlighting the versatility of our pump designs.
Flexible Couplings: Elevate your machinery's resilience with our flexible couplings, engineered to address movement such as vibrations and thermal expansion. Ideal for managing misalignment between drive and pump shafts, they also reduce operational noise while providing robust performance.
Flexible couplings stand out by accommodating movement without damage, making them perfect for scenarios with unavoidable misalignment. By effectively absorbing vibrations and reducing noise, these couplings, despite their intricate design and cost, offer long-term maintenance savings by safeguarding shafts and bearings from premature wear.
Our Semhai API standard chemical pumps feature the robust API 671 Standard Disc Couplings, ensuring superior performance and reliability for demanding chemical applications.
Designed with advanced balancing quality, our couplings reduce reaction loads and amplify the efficiency of the pump's power transmission system, delivering heightened performance and longevity compared to conventional options.
| 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 strong and enduring partnerships with a wide array of preeminent domestic pump-testing institutions, demonstrating our commitment to excellence and innovation. These alliances include:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial situated in Zhenjiang City,
The esteemed Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City,
And the distinguished Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, among others.
Audited Supplier 
){kind=link}