The SLZ end suction, long coupled, single-stage centrifugal chemical process pump is meticulously standardized to EN 22858 / ISO 2858, offering unparalleled versatility across diverse applications in both industrial and marine settings. Expertly crafted to handle low viscosity, clean or slightly contaminated fluids, this pump excels without interference from solid or fibrous particles. Ideal for moving fluids like fresh water, sea water, and various fuels including diesel, petrol, and kerosene, it serves brilliantly across applications such as fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, and treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing a robust and substantial centrifugal chemical process pump, engineered for high flow and high-pressure demands, suitable for the most demanding industrial applications.
Experience the numerous advantages of the long coupled centrifugal chemical process pump design, promising efficiency and reliability.
The long coupled configuration boasts exceptional ease of maintenance, allowing convenient access to the pump head without the necessity to detach the motor.
Built for endurance, this process pump features a durable construction intended for continuous operation. The inclusion of additional bearings within the pump head significantly reduces motor strain during active use.
The ingenious back pull out design permits the motor's removal while maintaining the pump's connection to the pipework, remarkably saving time during servicing and maintenance.
With separate shafts for the centrifugal chemical process pump and motor, only the pump shaft requires replacement upon breakage, unlike less durable market alternatives that risk entire motor replacement.
The innovative long coupled design provides substantial spacing between the pump and motor, effectively shielding the motor from potential fluid ingress following seal failure.
Product Summary
• Capable of efficiently pumping a broad spectrum of clean, low viscosity, or slightly contaminated fluids.
• Available with a choice of closed or semi-open impeller options to suit varying needs.
• Features a back pull out design, ensuring rapid and straightforward maintenance processes.
• Capable of handling maximum fluid temperatures up to an impressive 175°C.
• Equipped with a robust heavy-duty shaft that remains untouched by the fluid, enhancing longevity.
• Includes an optional external seal cooling system to maintain optimal performance.
• Distinctive independent pump and motor shafts for enhanced operational efficiency.
• Constructed from a selection of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, tailored upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with flanges per EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers a selection of sealing options: gland packing, single, double, and cartridge mechanical seals.
• Available with three-phase 50hz / 60hz motors, featuring IP55 protection as standard.
• ATEX certified versions available upon request for explosive atmosphere suitability.
• Option for independent certification to meet stringent regulatory standards upon request.
• Engineered in full compliance with EN 22858 / ISO 2858 standards, ensuring quality and reliability.
• Designed with low NPSH to minimize cavitation risk and enhance performance.
• Allows assembly without the need for alignment, simplifying installation.
• All impellers are meticulously balanced to ISO 1940 class 6.3, ensuring optimal performance.
• Long coupled with baseplate configuration for enhanced stability.
• Capable of incorporating an API Seal in accordance with API682 specifications, enhancing sealing integrity.
• Oil lubricated ball bearings for reduced friction and increased durability.
| 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 feature renowned brand bearings, promising exceptional durability and longevity even amidst the toughest environments. Experience an unparalleled service life that withstands the harshest of conditions.
To effectively counteract axial thrust, most of our impellers are equipped with precision-engineered wear rings at both the front and rear, complemented by a balance hole on the impeller's back shroud. In select pump models where axial thrust is minimal, the design ingeniously foregoes a rear wear ring and balance hole, optimizing efficiency.
Engineered with meticulous precision, our casting impellers guarantee superior performance, crafted from premium materials such as cast iron, stainless steel, and bronze.
Exploring Two Essential Categories:
1) "Flush" - This method introduces a pristine, cooling liquid into the seal chamber, enhancing the operational environment. A strategically placed secondary port, often positioned downward, serves as an observation or vent opening for any leakage.
2) "Barrier or Buffer" for dual seals - By supplying a secondary fluid between two mechanical seals, this approach prevents ambient air exposure to the pumped fluid, elevates seal cooling, and boosts overall safety.
It's essential to note that not all mechanical seals demand specialized external flush configurations.
Advanced Flexible Couplings
In contrast to rigid couplings, flexible couplings adeptly manage movements like vibrations and thermal expansion without incurring damage. This makes them indispensable in scenarios with unavoidable misalignment between drive and pump shafts. Their adept vibration absorption also significantly reduces operational noise. While their sophisticated design may be pricier, the long-term benefits of shaft and bearing protection, alongside reduced maintenance costs, offer substantial savings.
Semhai's chemical pumps adhere to the rigorous API 671 standards, featuring API Standard Disc Couplings.
These couplings deliver superior balancing quality with reduced reaction loads, significantly enhancing the efficiency and effectiveness of the pump's entire 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 |
Distinguished Collaboration Partners
Our company, Shanghai Semhai Pump Co., Ltd., has proudly forged enduring partnerships with a host of premier domestic pump-testing authorities, ensuring the highest standards of quality and reliability. Among these valued collaborations are:
- 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 distinguished Ministry of Agriculture, Water Pump Quality Supervision and Testing Center based in Chongqing City,
- And the reputable Shanghai Mechanical and Electrical Products Quality Inspection Center located in Shanghai City, among others.
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