Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump! This impressive piece of engineering is meticulously standardized to EN 22858 / ISO 2858, making it a versatile choice for an expansive array of applications within both the industrial and marine sectors. Specially crafted to handle low viscosity clean or slightly contaminated fluids with utmost efficiency, it triumphantly excludes solid or fibrous particles. Whether you're dealing with fresh water, seawater, or fuels such as diesel, petrol, and kerosene, this pump stands ready. It's perfect for fuel transfer, chemical processes, energy plants, mining, fire fighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing our robust and mighty centrifugal chemical process pump, built to handle large volumes and withstand high pressures. It's your reliable partner in heavy-duty applications.
Experience the multitude of advantages that come with our long coupled centrifugal chemical process pump design. It's engineered for performance and longevity.
Enjoy unparalleled ease of maintenance with the long coupled configuration. Access the pump head effortlessly without the hassle of removing the motor, streamlining your operations.
Designed for durability and continuous operation, this robust process pump features additional bearings in the pump head. These bearings significantly reduce the motor's strain during operation, ensuring seamless functionality.
The innovative back pull out design allows for motor extraction while the pump remains connected to the pipework, optimizing time efficiency during service or maintenance.
Our pump and motor feature independent shafts, an innovative design ensuring that in the event of a pump shaft breakage, only the shaft needs replacing. In contrast, less robust designs require entire motor replacement, making ours a cost-effective choice.
With the long coupled design, there's ample space between pump and motor, providing essential protection against fluid ingress in cases of seal failure, safeguarding your motor's integrity.
Product Summary
• Versatility at its best: Pump a diverse range of clean, low viscosity, or slightly contaminated fluids with ease.
• Flexibility in design: Choose between closed or semi-open impellers to suit your specific needs.
• Maintenance made simple: The back pull out design ensures quick and hassle-free servicing.
• Withstand the heat: Capable of handling maximum fluid temperatures up to 175°C.
• Superior durability: The heavy-duty shaft remains untouched by fluid, enhancing longevity.
• Advanced cooling: Optional external seal cooling system available for optimal performance.
• Independent operation: Separate shafts for pump and motor ensure efficient functionality.
• Material variety: Available in cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Flange flexibility: Suction and discharge flanges compliant with EN 1092-2 / PN 16 and EN 1092-1 / PN 16 for various materials.
• Sealing solutions: Choose from gland packing or single, double, and cartridge mechanical seal options.
• Motor versatility: Compatible with three-phase 50hz / 60hz motors, IP55 standard.
• Specialized configurations: ATEX version available upon request.
• Certified excellence: Independent certification available upon request to ensure compliance and quality assurance.
• Quality manufacturing: Crafted in accordance with standard EN 22858 / ISO 2858, ensuring top-notch performance.
• Low NPSH: Efficiently designed to meet low Net Positive Suction Head requirements.
• Effortless assembly: No alignment needed for a quick and seamless setup.
• Precision engineering: All impellers are perfectly balanced according to ISO 1940 class 6.3 for optimal performance.
• Sturdy support: Long coupled with a sturdy baseplate for enhanced stability.
• API compliant: Option to install an API Seal in accordance with API682 for specialized needs.
• Smooth operation: Oil lubricated ball bearings ensure seamless performance 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 boast the integration of renowned brand bearings, promising exceptional durability and extended service life. Engineered for resilience, these pumps are designed to excel even in the most challenging environments, providing reliability and performance that you can trust.
To expertly counter axial thrust, our pumps feature strategically placed wear rings at both the front and the back of most impellers. Additionally, a balance hole is meticulously crafted on the impeller's back shroud. However, for pumps where axial thrust is minimal, the absence of a wear ring and balance hole at the rear ensures efficiency without compromise.
The precision-engineered impellers are crafted with high accuracy, ensuring optimal performance. Available in cast iron, stainless steel, and bronze, these impellers epitomize quality and durability, meeting diverse industrial needs.
Discover Two Primary Categories:
1) "Flush" - Enhance the seal chamber environment by introducing a clean, cool liquid. Equipped with a secondary, downward-oriented port, this innovative feature serves as a convenient observation or vent opening for leakage, optimizing operational efficiency.
2) "Barrier or Buffer" for dual seals - By introducing a secondary fluid between two mechanical seals, this method effectively prevents ambient air from contaminating the pumped fluid, while also boosting seal cooling and safety, ensuring superior operational integrity.
Notably, many mechanical seals function efficiently without requiring elaborate external flush arrangements, streamlining maintenance and operation.
Dynamic Flexible Couplings
Flexible couplings, unlike their rigid counterparts, are engineered to accommodate movement such as vibrations and thermal expansion, thus avoiding damage. Ideal for applications with unavoidable misalignment between drive and pump shafts, these couplings effectively absorb vibrations and reduce operational noise. While their design is more intricate and costly, the long-term benefits include significant maintenance savings due to the protection they offer to shafts and bearings, safeguarding against damage and premature wear.
Our Semhai API standard chemical pumps incorporate API 671 Standard Disc Couplings, ensuring reliability and precision.
These couplings provide superior balancing quality and reduced reaction loads compared to standard couplings, enhancing both efficiency and power transmission effectiveness across the entire pump 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 enduring and strategic partnerships with several prestigious national pump-testing authorities, ensuring our commitment to quality and innovation remains at the forefront. Our collaborations include renowned institutions such as:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, a leader in pump certification,
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial based in Zhenjiang City, known for its expertise in irrigation solutions,
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, dedicated to agricultural pump excellence,
And the esteemed Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, a hallmark of mechanical and electrical product inspection.
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