Introducing the SLZ end suction, long coupled, single-stage centrifugal chemical process pump, meticulously engineered to meet EN 22858 / ISO 2858 standards. This versatile pump is your solution for diverse applications spanning industrial and marine sectors. Expertly crafted to handle low viscosity, clean, or slightly contaminated fluids devoid of solid or fibrous materials, it excels in pumping fresh water, sea water, and various fuels such as diesel, petrol, and kerosene. The SLZ pump is perfect for fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply and treatment, pressurisation, grey water management, dewatering, and marine activities.
Experience unparalleled performance with this robust centrifugal chemical process pump, designed to handle high flow rates and pressures, making it the ideal solution for demanding industrial applications.
The long coupled centrifugal chemical process pump design delivers multiple advantages, ensuring reliability and performance.
With its long coupled configuration, maintenance becomes a breeze, allowing easy access to the pump head without dismantling the motor, ensuring seamless operation.
Built for endurance, this pump is engineered for continuous operation, featuring additional bearings in the pump head to alleviate motor strain, enhancing durability and reliability.
The innovative back pull out design facilitates motor removal while keeping the pump connected to the pipework, drastically reducing downtime during servicing or maintenance.
Featuring independent pump and motor shafts, only the pump shaft requires replacement if damaged, unlike other models where motor shaft damage necessitates full motor replacement, ensuring cost-effective upkeep.
The long coupled design creates a protective gap between the pump and motor, safeguarding the motor from fluid ingress in the event of seal failure, enhancing longevity.
Product Summary
• Capable of efficiently pumping a broad spectrum of clean, low-viscosity, or slightly contaminated fluids.
• Choose between closed or semi-open impeller options to suit your specific needs.
• Back pull out design guarantees quick and hassle-free maintenance, minimizing downtime.
• Can handle maximum fluid temperatures of up to 175°C, expanding its application range.
• Heavy duty shaft remains isolated from fluid contact, ensuring long-lasting performance.
• Optional external seal cooling systems are available to enhance operational efficiency.
• Independent pump and motor shafts offer an added layer of robustness and reliability.
• Constructed in various materials including cast iron, 316 stainless steel, duplex stainless steel, and bronze, with other options upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Versatile sealing options include gland packing or single, double, and cartridge mechanical seals.
• Available with three-phase 50hz / 60hz motors, featuring IP55 as standard for optimal performance.
• ATEX compliant versions are available upon request for specialized environments.
• Obtain independent certification on request, assuring quality and compliance.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, ensuring global compatibility.
• Low NPSH design minimizes cavitation risk and enhances pump efficiency.
• Assembly is streamlined and requires no alignment, simplifying installation.
• All impellers are precision balanced to ISO 1940 class 6.3, ensuring smooth operation.
• Features a long coupled design with a robust baseplate for stability and strength.
• API seals can be installed in accordance with API682 standards, offering advanced sealing solutions.
• Oil lubricated ball bearings ensure smooth operation and extend the lifespan of the pump.
| 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 feature renowned brand bearings, ensuring remarkable durability even in the most demanding environments. Expect extended performance and longevity from our products where reliability is paramount.
To skillfully manage axial thrust, our engineering includes wear rings strategically positioned at the front and rear of most impeller designs, complemented by a balance hole on the impeller's back shroud. In scenarios where axial thrust is minimal, these features may be omitted, maintaining efficiency without compromise.
Crafted with precision, our high-grade casting impellers assure exceptional performance, available in materials such as robust cast iron, enduring stainless steel, and premium bronze.
Our product offerings are categorized into two principal segments:
1) 'Flush' System - Designed to enhance the seal chamber's environment by injecting clean, cool liquid. A secondary port, typically positioned downward, serves as a leakage observer or vent, ensuring optimal functionality.
2) 'Barrier or Buffer' System with Dual Seals - This innovative approach introduces a secondary fluid between two mechanical seals, effectively blocking ambient air from reaching the pumped fluid. This not only boosts seal cooling but also heightens safety.
It's important to note that not all mechanical seal systems necessitate specialized external flush configurations.
Dynamic and Adaptable Couplings
In contrast to rigid couplings, flexible couplings are designed to handle movements such as vibrations and thermal expansion without incurring damage. Their adaptability makes them ideal for situations with inevitable misalignment between drive and pump shafts. With superior vibration absorption, they significantly reduce operational noise. Despite their intricate and costlier design, these couplings safeguard shafts and bearings, leading to reduced maintenance costs over time.
Our Semhai API standard chemical pumps incorporate state-of-the-art API 671 Standard Disc Couplings, setting a benchmark in reliability.
Featuring lower reaction loads and superior balancing quality, these couplings enhance the entire pump system's efficiency and performance, delivering exceptional power transmission.
| 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 fostered enduring collaborative partnerships with esteemed domestic pump-testing institutions of considerable repute, including:
The National Quality Supervision and Inspection Center of Industrial Pumps located in the heart of Tiexi District, Shenyang City,
The distinguished Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, nestled in Zhenjiang City,
The reputable Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, situated in the vibrant city of Chongqing,
And the renowned Shanghai Mechanical and Electrical Products Quality Inspection Center, set in the bustling metropolis of Shanghai.
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