The SLZ end suction, long coupled, single stage centrifugal chemical process pump is engineered to meet the exacting standards of EN 22858 / ISO 2858, making it an exemplary choice for diverse industrial and marine applications. It is meticulously crafted to handle low viscosity liquids, whether clean or slightly contaminated, devoid of solid or fibrous particles. This versatile pump efficiently manages a spectrum of fluids such as fresh water, sea water, and fuels including diesel, petrol, and kerosene. Its typical applications range from fuel transfer, chemical processing, energy plant operations, mining, and fire fighting, to irrigation, water supply, treatment, pressurisation, grey water management, dewatering, and marine operations.
This robust centrifugal chemical process pump is engineered for high-capacity flow and impressive pressure handling, embodying the strength and endurance needed for demanding industrial tasks.
The design of this long coupled centrifugal chemical process pump offers an array of outstanding advantages.
Designed with maintenance in mind, the long coupled configuration allows effortless access to the pump head, eliminating the need to remove the motor, thus simplifying routine upkeep.
Engineered for durability, this process pump is crafted for relentless operation, featuring additional bearings in the pump head that significantly alleviate motor stress during performance.
The innovative back pull-out design permits motor removal while keeping the pump connected to the pipework, saving valuable time during service and maintenance activities.
Equipped with independent shafts for the pump and motor, this design ensures that only the pump shaft requires replacement if damaged, unlike less robust models where a shaft break necessitates complete motor replacement.
The long coupled design strategically positions a substantial gap between the pump and motor, safeguarding the motor against potential fluid ingress in the event of a seal failure.
Product Summary
• Capable of pumping a broad spectrum of low viscosity clean or slightly contaminated fluids, offering versatility in applications
• Available with a choice of closed or semi-open impellers, catering to diverse operational needs
• Features a back pull-out design for seamless and swift maintenance procedures
• Handles maximum fluid temperatures up to a robust 175°C, ensuring reliability in demanding thermal conditions
• Heavy-duty shaft constructed to avoid contact with the fluid, enhancing durability and longevity
• Option for an external seal cooling system to maintain optimal operational temperatures
• Distinct pump and motor shafts to ensure reliability and ease of maintenance
• Available in varied materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, to meet specific application requirements
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with EN 1092-1 / PN 16 available for steel and stainless steel casings
• Offers a range of sealing options including gland packing or single, double, and cartridge mechanical seals
• Equipped with three-phase motors (50Hz / 60Hz) meeting IP55 standard, ensuring robust and reliable performance
• ATEX version available upon request, catering to environments requiring explosion-proof equipment
• Independent certification available upon request, offering assurance of quality and compliance
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring consistency and quality
• Designed with low NPSH to prevent cavitation and enhance performance
• Facilitates assembly without the need for alignment, simplifying installation
• All impellers are precisely balanced in accordance with ISO 1940 class 6.3, ensuring smooth and efficient operation
• Long coupled with baseplate for stability and enhanced operational efficiency
• Capable of accommodating an API Seal, in compliance with API682, for enhanced sealing solutions
• Features oil-lubricated ball bearings to ensure smooth operation 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 pumps are equipped with renowned brand bearings, ensuring robust performance and longevity, even in challenging environments. These bearings are a hallmark of our centrifugal and chemical pump products, promising extended service life regardless of harsh working conditions.
To effectively balance axial thrust, most of our pump impellers are designed with wear rings at both the front and rear, complemented by a balance hole on the back shroud. This design optimizes the thrust balance. However, in pumps where axial thrust is minimal, the rear wear ring and balance hole are omitted to maintain streamlined efficiency.
Our high-precision casting impellers, available in materials such as cast iron, stainless steel, and bronze, guarantee exceptional performance. This meticulous casting process is pivotal in ensuring our products deliver reliable, high-quality results.
There are generally two main groups:
1) "Flush" - This method introduces clean, cool liquid into the seal chamber, thus enhancing the operational conditions. A secondary, smaller port, typically oriented downward, functions as a leakage observation or vent opening, allowing for meticulous monitoring.
2) "Barrier or Buffer" - Utilized with dual seals, this technique introduces a secondary fluid to the space between two sets of mechanical seals. This prevents ambient air from contacting the pumped fluid, improves seal cooling, and enhances safety, ensuring optimal operational security.
It is noteworthy that not every mechanical seal demands a specialized external flush setup, making it versatile for various operational requirements.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, can endure movements such as vibrations and thermal expansion without incurring damage. This flexibility makes them perfect for setups with inherent misalignment between drive and pump shafts. Their ability to absorb vibrations also contributes to noise reduction. While their design is more complex and costly, the protection they offer to shafts and bearings results in long-term maintenance savings.
Semhai API standard chemical pumps proudly incorporate API 671 Standard Disc Couplings.
These couplings feature lower reaction loads and superior balance quality compared to standard couplings, significantly boosting the efficiency and effectiveness 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 |
Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. takes immense pride in its robust alliances with premier domestic pump-testing institutions, ensuring unparalleled quality and innovation. These long-term partnerships with esteemed organizations set us apart as a leader in the industry. Our notable collaborations include:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City.
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, situated in Zhenjiang City.
The esteemed Ministry of Agriculture's Water Pump Quality Supervision and Testing Center based in Chongqing City.
Shanghai's own Mechanical and Electrical Products Quality Inspection Center, conveniently located within the vibrant city itself, among others.
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