The SLZ end suction, long coupled, single stage centrifugal chemical process pump is engineered to perfection, strictly conforming to EN 22858 / ISO 2858 standards. This versatile powerhouse is ideal for an extensive array of industrial and marine market applications. Specially crafted to handle low viscosity fluids, whether clean or mildly contaminated, it efficiently manages without any solid or fibrous obstructions. Perfect for pumping fresh water, sea water, and various fuels like diesel, petrol, and kerosene, this pump excels in diverse scenarios including fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, system pressurisation, grey water management, dewatering, and marine operations.
Behold a large and robust centrifugal chemical process pump, designed for demanding environments with its formidable high flow and high pressure capabilities.
The long coupled centrifugal chemical process pump design offers a multitude of advantages.
With its long coupled configuration, maintenance becomes a breeze, as accessing the pump head is possible without removing the motor.
Engineered for durability, this process pump is built for continuous operation. Additional bearings in the pump head significantly reduce the strain on the motor, ensuring a robust performance over time.
The innovative back pull-out design allows for the removal of the motor while the pump remains connected to the pipework, greatly enhancing efficiency during servicing and maintenance.
Featuring independent shafts for the pump and motor, this design ensures that only the pump shaft needs replacement in case of breakage, unlike less durable market alternatives that require a complete motor replacement.
The exceptional long coupled design provides ample space between the pump and motor, safeguarding the motor from potential fluid ingress in the unlikely event of a seal failure.
Product Summary
• Capable of pumping an extensive range of clean, low viscosity, or slightly contaminated fluids.
• Offers the flexibility of a closed or semi-open impeller.
• Innovative back pull-out design ensures maintenance is quick and hassle-free.
• Handles maximum fluid temperatures up to an impressive 175°C.
• Features a heavy-duty shaft, ingeniously designed to avoid contact with fluids.
• Equipped with an optional external seal cooling system.
• Boasts independent pump and motor shafts for superior reliability.
• Available in materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with EN 1092-1 / PN 16 options for steel and stainless steel casings.
• Offers gland packing or single, double, and cartridge mechanical seal options.
• Supports three-phase 50hz / 60hz motors, with IP55 as standard.
• ATEX version available upon request for specialized needs.
• Independent certification can be provided on request to meet specific requirements.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards.
• Designed with a low NPSH for optimal performance.
• Enables assembly without the need for alignment, enhancing ease of setup.
• All impellers are meticulously balanced according to ISO 1940 class 6.3 standards.
• Features a long coupled design with a sturdy baseplate.
• Compatible with API Seal, conforming to API682 standards for additional reliability.
• 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 |
Discover the Excellence: Our renowned brand bearings are meticulously integrated into our centrifugal and chemical pump series, promising an exceptional extension of service life even when faced with the most extreme working environments.
Ingenious Design for Optimal Balance: To harmonize axial thrust, our designs feature wear rings strategically placed both at the front and rear of most impellers, complemented by a balance hole on the impeller's back shroud. In scenarios where axial thrust is minimal, the need for a rear wear ring and balance hole is elegantly negated.
Precision at its Finest: Our high-precision casting impellers guarantee top-tier performance, available in robust materials such as cast iron, stainless steel, and bronze.
A Comprehensive Overview: There are generally two main groups:
1) "Flush" - This technique introduces pristine, cool liquid into the seal chamber, enhancing the operational conditions. A secondary, smaller port, typically oriented downward, is provided for leakage observation or venting.
2) "Barrier or Buffer" for dual seals - A secondary fluid is delivered to the space between dual mechanical seals, acting as a barrier to prevent ambient air from contacting the pumped fluid, improving seal cooling, and bolstering safety.
Essential Insight: It's important to note that not all mechanical seals demand special external flush arrangements.
Dynamic Solutions: Flexible Couplings
Flexible couplings, unlike their rigid counterparts, are designed to accommodate movement such as vibrations and thermal expansion without sustaining damage. This makes them indispensable for applications with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations not only reduces operating noise but also extends component life, offering long-term maintenance savings despite their more intricate and costly design.
Uncompromised Standards: Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, embodying excellence and reliability.
Enhanced Performance: This coupling design yields lower reaction loads while achieving superior balancing quality compared to conventional 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: Partnering with industry-leading agencies to ensure excellence and precision at every step of our journey.
At Shanghai Semhai Pump Co., Ltd., we have fostered robust and enduring collaborations with a multitude of prestigious domestic pump-testing institutions. These partnerships are a testament to our commitment to quality and innovation, including:
National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shenyang City - a beacon of excellence in industrial pump testing and quality assurance.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City - where precision meets ingenuity in irrigation machinery quality inspection.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City - ensuring agricultural water pump superiority through rigorous testing and evaluation.
Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City - at the forefront of mechanical and electrical product quality inspection, driving innovation and excellence.
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