Discover the SLZ end suction, long coupled, single stage centrifugal chemical process pump, meticulously engineered to meet the EN 22858 / ISO 2858 standards. This versatile marvel is adept for a multitude of applications across the industrial and marine markets. Its sophisticated design enables it to efficiently handle low viscosity clean or slightly contaminated fluids, sans fibrous solids, with aplomb. Whether it's fresh water, sea water, or fuels like diesel, petrol, and kerosene, this pump excels in fuel transfer, chemical industries, energy plants, mining sectors, fire fighting operations, irrigation, water supply, water treatment, pressurization, grey water management, dewatering processes, and marine applications. The SLZ pump is your go-to solution for robust and reliable performance.
This is an exceptionally robust centrifugal chemical process pump, crafted for high flow and pressure demands, making it an ideal choice for heavy-duty applications.
The ingenious design of the long coupled centrifugal chemical process pump offers a plethora of advantages.
One of the standout features of the long coupled configuration is its remarkable ease of maintenance. It allows seamless access to the pump head without necessitating the motor's removal.
Engineered for relentless operation, this process pump is fortified with additional bearings within the pump head. These bearings significantly alleviate the motor's strain during operation, ensuring durability and continuous use.
The innovative back pull-out design empowers you to remove the motor while keeping the pump connected to the pipework, ensuring time-efficient servicing and maintenance.
With independent shafts for the centrifugal chemical process pump and motor, only the pump shaft needs replacing if damaged. This feature contrasts with other less robust pumps that integrate the motor shaft, necessitating complete motor replacement if the shaft breaks, thus offering you peace of mind and cost efficiency.
The long coupled design provides ample space between the pump and motor, effectively shielding the motor from fluid ingress in case of a seal failure.
Product summary
• Masterfully crafted to pump a vast array of clean low viscosity or slightly contaminated fluids with confidence and precision
• Choices of closed or semi-open impeller available to suit your specific needs
• The back pull-out design ensures maintenance is a breeze, both quick and easy
• Capable of handling fluids at temperatures reaching up to 175°C
• A heavy-duty shaft that remains untouched by the fluid, ensuring longevity and reliability
• External seal cooling systems are available to enhance performance and integrity
• Pump and motor feature independent shafts for greater resilience and serviceability
• Available in diverse materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request
• Suction and discharge flanges are compliant with EN 1092-2 / PN 16, with options for EN 1092-1 / PN 16 for steel and stainless steel casings
• Offers gland packing or single, double, and cartridge mechanical seal options to meet varied sealing requirements
• Features robust three-phase 50hz / 60hz motors, with IP55 protection as standard
• ATEX-certified versions available upon request for hazardous environments
• Independent certification available upon request for quality assurance
• Manufactured with precision in accordance with EN 22858 / ISO 2858 standards
• Low NPSH for improved suction performance
• Designed for assembly without the need for alignment, simplifying installation
• All impellers are expertly balanced to ISO 1940 class 6.3 standards for optimal performance
• Designed as long coupled with a robust baseplate for stability
• Option to install an API Seal as per API682 standards for enhanced sealing solutions
• Equipped with oil-lubricated ball bearings for smooth and efficient 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 |
Renowned and prestigious brand Bearings are extensively utilized across our range of centrifugal and chemical pumps. Our promise? A longer service life meticulously engineered to endure even the toughest of working environments.
To artfully balance axial thrust, most of our impellers are equipped with meticulously designed wear rings at both the front and rear. Additionally, a precision-engineered balance hole graces the back shroud of the impeller. For certain pumps, the axial thrust is ingeniously minimized, eliminating the need for a rear wear ring and balance hole.
Our high-precision casting impeller guarantees superior performance. Choose from robust materials like cast iron, stainless steel, and bronze for exceptional durability and reliability.
We offer two distinguished main groups:
1) "Flush" - A pristine, cool liquid is expertly injected into the seal chamber, optimizing the operating environment. A secondary, diminutive port is strategically oriented downward, often serving as an insightful leakage observation or venting avenue.
2) "Barrier or Buffer" used with dual seals - A secondary fluid is precisely introduced to the interstitial space between dual mechanical seals, preventing ambient air from mingling with the pumped fluid, enhancing seal cooling, and bolstering safety.
Notably, it's important to recognize that not all mechanical seals necessitate the use of specialized external flush systems.
Adaptable and Versatile Flexible Couplings
In contrast to rigid couplings, flexible couplings gracefully accommodate movement, such as vibrations and thermal expansion, without incurring harm. Their prowess makes them ideal for scenarios where unavoidable misalignment occurs between drive and pump shafts. Their ability to absorb vibrations efficiently also curtails excessive operational noise. While they boast a more intricate and costly design, the protective benefits they offer to shafts and bearings, by averting damage and premature wear, translate into significant maintenance savings over time.
Our Semhai API standard chemical pumps proudly utilize API 671 Standard Disc Couplings.
These couplings boast reduced reaction loads and superior balancing quality compared to standard couplings, enhancing both 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. has cultivated robust and enduring partnerships with several premier domestic pump-testing institutions, ensuring the highest standards of quality and innovation. These alliances include:
The esteemed 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 prestigious Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, based in Chongqing City.
Shanghai Mechanical and Electrical Products Quality Inspection Center, right in the heart of Shanghai City, among other distinguished centers.
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