Introducing the SLZ end suction pump: a masterpiece crafted with precision to meet the highest standards of EN 22858 / ISO 2858. This long-coupled, single-stage centrifugal chemical process pump is a versatile solution, perfect for a myriad of applications across both industrial and marine sectors. Impeccably designed, it adeptly handles low viscosity clean or slightly contaminated fluids, steering clear of solids or fibrous materials. Commonly pumped fluids encompass fresh water, sea water, and various fuels like diesel, petrol, and kerosene. Its applications are vast and varied, from fuel transfer to chemical industry usage, energy plants, mining operations, firefighting missions, irrigation projects, water supply and treatment, pressurisation, grey water handling, dewatering, and marine enterprises.
Presenting a robust powerhouse: this is a large, heavy-duty centrifugal chemical process pump engineered for high flow and impressive pressure capabilities. It stands as a testament to durability and performance.
Revel in the advantages of the long-coupled centrifugal chemical process pump design, an epitome of efficiency and engineering finesse.
Maintenance becomes a breeze with the long-coupled configuration, allowing easy access to the pump head without the hassle of motor removal.
Built for endurance, this pump is robustly crafted for continuous usage. Additional bearings in the pump head alleviate motor strain during operation, ensuring longevity and performance.
The ingenious back pull-out design facilitates motor removal without detaching the pump from the pipework, significantly saving time during service and maintenance routines.
With separate shafts for the centrifugal chemical process pump and motor, only the pump shaft needs replacement if breakage occurs, unlike other less durable options requiring full motor replacement when the shaft breaks.
The long-coupled design offers ample space between pump and motor, safeguarding the motor from fluid ingress should a seal failure occur, thus preserving motor integrity.
Product Summary
• Skillfully pumps a diverse range of clean, low viscosity, or slightly contaminated fluids with ease.
• Choose between closed or semi-open impeller options for tailored performance.
• Back pull-out design ensures maintenance is quick and straightforward.
• Handles maximum fluid temperatures reaching up to 175°C with confidence.
• Features a heavy-duty shaft meticulously designed to remain contact-free from the fluid.
• Equipped with an external seal cooling system, ensuring optimal operational conditions.
• Offers independent pump and motor shafts for enhanced reliability.
• Available in materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request to meet diverse needs.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 in steel and stainless steel casings.
• Versatile sealing options with gland packing or single, double, and cartridge mechanical seals.
• Operates with three-phase 50Hz / 60Hz motors, embodying the IP55 standard.
• ATEX version available upon request for hazardous environments.
• Independent certification can be procured upon request, ensuring compliance and quality.
• Meticulously manufactured to conform with EN 22858 / ISO 2858 standards.
• Features low NPSH characteristics, reducing cavitation risks.
• Assembly is seamless with no alignment required for effortless setup.
• All impellers are expertly balanced to ISO 1940 class 6.3 standards, ensuring smooth operation.
• Designed with a long-coupled configuration including a baseplate for stability and ease of use.
• Capable of incorporating an API Seal as per API682 standards for enhanced sealing performance.
• Fitted with oil-lubricated ball bearings, offering exceptional durability and reduced maintenance.
| 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 renowned brand bearings, ensuring an extended service life even amidst the harshest working environments. Experience reliability and longevity like never before.
To masterfully balance axial thrust, most impellers feature wear rings at both the front and rear, complemented by a strategically placed balance hole on the back shroud. For pumps where axial thrust is minimal, these components are optimally omitted, showcasing a tailored design for every need.
The high-precision casting of our impellers guarantees optimal performance, available in robust materials such as cast iron, stainless steel, and bronze, ensuring durability and excellence.
Our offerings are categorized into two primary groups:
1) "Flush" - This approach introduces a clean, cool liquid into the seal chamber, significantly enhancing the operational environment. A secondary, often downward-oriented port is included, which serves as a leakage observation or vent, ensuring optimal maintenance and safety.
2) "Barrier or Buffer" for dual seals - A secondary fluid is ingeniously supplied between two mechanical seals, effectively preventing ambient air from mixing with the pumped fluid. This not only improves seal cooling but also heightens safety measures.
It's noteworthy that not all mechanical seals necessitate special external flush arrangements, simplifying maintenance and operation.
Adaptive and Efficient Flexible Couplings
Flexible couplings, unlike their rigid counterparts, offer remarkable resilience by accommodating movements such as vibrations and thermal expansion without sustaining damage. Ideal for setups involving slight misalignment between drive and pump shafts, they adeptly reduce operating noise through vibration absorption. While their design is more complex and costly, the long-term maintenance savings due to shaft and bearing protection are substantial.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, ensuring top-tier performance.
These couplings boast lower reaction loads and superior balancing quality, outperforming normal couplings with enhanced efficiency, optimizing the entire pump power transmission process.
| 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 Collaboration with Professional Agencies
Shanghai Semhai Pump Co., Ltd. has forged enduring partnerships with several prominent domestic pump-testing institutions. These collaborations ensure that our products meet the highest standards of quality and performance. We proudly partner with some of the industry's most respected entities, including:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City,
The distinguished Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City,
The reputable Ministry of Agriculture, Water Pump Quality Supervision and Testing Center situated in Chongqing City,
And the renowned Shanghai Mechanical and Electrical Products Quality Inspection Center, based in Shanghai City, among others.
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