Introducing the SLZ end suction pump, a long coupled single-stage centrifugal chemical process marvel, meticulously standardized to EN 22858 / ISO 2858. Crafted for versatility, it finds its purpose across industrial and marine markets, adept at handling low viscosity clean or slightly contaminated fluids, devoid of fibrous or solid impurities. Whether you're dealing with fresh water, sea water, or fuels like diesel, petrol, and kerosene, this pump excels in applications such as fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Behold a robust and mighty centrifugal chemical process pump, designed for heavy-duty performance with exceptional high flow and pressure capabilities.
The long coupled centrifugal chemical process pump design offers a plethora of advantages that enhance efficiency and reliability.
With its long coupled configuration, maintenance becomes a breeze, allowing easy access to the pump head without the need to remove the motor.
Engineered for resilience, this process pump boasts continuous operation prowess, thanks to additional bearings embedded in the pump head, effectively alleviating motor strain during operation.
Featuring a back pull out design, the pump allows the motor to be detached while remaining connected to the pipework, significantly reducing service and maintenance time.
Engineered with independent centrifugal chemical process pump and motor shafts, only the pump shaft requires replacement in case of failure, a marked upgrade over less robust models that necessitate complete motor replacement if the shaft breaks.
The innovative long coupled design places a generous space between the pump and motor, safeguarding the motor from fluid intrusion should a seal fail.
Product Summary
• Capable of handling a diverse array of clean low viscosity or slightly contaminated fluids with ease.
• Equipped with the option of closed or semi-open impellers for optimal performance.
• Back pull out design ensures maintenance is swift and hassle-free.
• Enduring maximum fluid temperatures of up to 175°C with aplomb.
• Heavy-duty shaft design prevents fluid contact, ensuring long-term durability.
• Optional external seal cooling system available for enhanced thermal management.
• Distinct separation of pump and motor shafts enhances reliability and serviceability.
• Available in materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and customizable 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.
• Gland packing or single, double, and cartridge mechanical seal options available for diverse sealing solutions.
• Offers motors in three-phase 50hz / 60hz configurations with IP55 as the standard.
• ATEX certified version available upon request for environments requiring explosion protection.
• Independent certification can be provided upon request, ensuring compliance and peace of mind.
• Proudly manufactured in accordance with EN 22858 / ISO 2858 standards, guaranteeing quality and precision.
• Designed with a low NPSH requirement, enhancing its application versatility.
• Simplified assembly process without alignment, ensuring quick setup.
• All impellers are meticulously balanced to ISO 1940 class 6.3, ensuring smooth operation.
• Features a long coupled design complete with baseplate for robust installation.
• Ready for an API Seal installation, compliant with API682 standard for enhanced sealing performance.
• Incorporates oil-lubricated ball bearings, ensuring efficient and long-lasting 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 |
Our centrifugal pumps and chemical pumps proudly incorporate renowned brand bearings, ensuring supreme reliability and extended service life, even under the most challenging conditions.
To expertly manage axial thrust, our pumps feature strategically placed wear rings both at the front and rear of the impeller, complemented by a balance hole on the back shroud. For pumps with minimal axial thrust, these additional components may be absent, ensuring efficient performance.
Crafted with precision, our casting impellers are available in robust materials such as cast iron, stainless steel, and bronze, guaranteeing optimal performance.
There are generally two main groups:
1) "Flush" - A pure, cool liquid is introduced into the seal chamber to enhance the operating environment. A secondary, smaller port, usually positioned downward, is often used for observing leakage or as a vent.
2) "Barrier or Buffer" for dual seals - Secondary fluid is introduced into the space between two mechanical seal sets, preventing ambient air from interacting with the pumped fluid, optimizing seal cooling, and boosting safety.
It's important to note that not all mechanical seals necessitate specific external flush arrangements.
Flexible Couplings
Flexible couplings offer superior adaptability to slight movements such as vibrations and thermal expansion, unlike rigid couplings. Ideal for situations with inevitable misalignment between the drive and pump shafts, they effectively absorb vibrations, reducing operational noise. While their design is more intricate and costly, they provide long-term maintenance savings by safeguarding the shaft and bearings from damage and premature wear.
Semhai's API standard chemical pumps are equipped with API 671 Standard Disc Couplings.
These couplings deliver lower reaction loads and superior balancing quality compared to standard couplings, significantly boosting the entire pump's power transmission efficiency and effectiveness.
| 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 forged enduring partnerships with premier pump-testing institutions across the nation, ensuring our products meet and exceed rigorous quality standards. Collaborations include renowned organizations such as:
The distinguished National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City,
The prestigious Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City,
The highly esteemed Ministry of Agriculture, Water Pump Quality Supervision and Testing Center nestled in Chongqing City,
And the eminent Shanghai Mechanical and Electrical Products Quality Inspection Center situated in Shanghai City, among others.
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