The SLZ end suction, long coupled, single stage centrifugal chemical process pump is meticulously crafted to meet the EN 22858 / ISO 2858 standards, offering exceptional versatility for a broad spectrum of industrial and marine applications. Engineered to handle low viscosity clean or slightly contaminated fluids devoid of solid or fibrous debris, it stands as an ideal choice for handling fluids like fresh water, sea water, and various fuels including diesel, petrol, and kerosene. Its unparalleled versatility makes it indispensable across numerous applications such as fuel transfer, chemical processing, energy production, mining, fire fighting, and irrigation. Additionally, it plays a vital role in water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
This robust, heavy-duty centrifugal chemical process pump is designed to deliver outstanding high flow and high pressure performance, making it an essential component in demanding industrial tasks.
Experience unsurpassed advantages with our long coupled centrifugal chemical process pump design.
The long coupled configuration significantly simplifies maintenance, allowing effortless access to the pump head without necessitating the motor's removal.
Crafted for continuous operation, this process pump is fortified with additional bearings in the pump head, effectively alleviating motor strain and enhancing durability during prolonged use.
The innovative back pull out design ensures that the motor can be conveniently removed while maintaining the connection with pipework, facilitating time-efficient service and maintenance.
Featuring independent shafts for both the centrifugal chemical process pump and motor, this design ensures that in the rare event of a pump shaft breakage, only the pump shaft needs replacement. This contrasts sharply with less robust market alternatives that utilize the motor shaft, necessitating entire motor replacement if a break occurs.
The long coupled design provides ample space between the pump and motor, offering an added layer of protection to the motor against fluid ingress in case of a seal failure.
Product summary
• Expertly designed to pump a diverse range of clean low viscosity or slightly contaminated fluids.
• Choose from closed or semi-open impeller designs to suit various operational needs.
• Features a back pull out design for hassle-free, swift maintenance.
• Capable of handling fluids with temperatures up to a maximum of 175°C.
• Incorporates a heavy-duty shaft that remains untouched by the fluid, ensuring longevity.
• Comes with an optional external seal cooling system for enhanced performance.
• Composed of independent pump and motor shafts for superior reliability.
• Available in a multitude of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges are crafted in compliance with EN 1092-2 / PN 16, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Offers gland packing or versatile mechanical seal options: single, double, and cartridge.
• Compatible with three-phase 50Hz / 60Hz motors. IP55 rated as the standard.
• ATEX version is available upon request for hazardous environments.
• Independent certification can be provided upon request to ensure quality assurance.
• Meticulously manufactured in line with the standard EN 22858 / ISO 2858.
• Designed for low NPSH, enhancing pump efficiency.
• Facilitates assembly without the need for alignment, streamlining the setup process.
• All impellers undergo balancing to meet ISO 1940 class 6.3 standards, ensuring smooth operations.
• Long coupled configuration comes with a sturdy baseplate for stable installation.
• Option to install an API Seal compliant with API682 for rigorous sealing requirements.
• Equipped with oil-lubricated ball bearings for reduced friction and increased lifespan.
| 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, which are acclaimed for their widespread usage. They promise to extend the lifespan of our pumps significantly, even when faced with the most challenging environments.
To expertly counterbalance axial thrust, dual wear rings are strategically positioned at the front and rear of most impellers, complemented by a balance hole on the back shroud. For pumps with minimal axial thrust, the rear wear ring and balance hole may be omitted, attesting to the pump's efficient design.
The high-precision casting of our impellers guarantees superior performance, crafted meticulously from durable materials such as cast iron, stainless steel, and bronze.
Our products fall into two distinct categories:
1) "Flush" System - Clean, cool liquid is ingeniously introduced into the seal chamber to optimize the operating conditions. A secondary, smaller port is typically directed downward, serving as a window for leakage monitoring or a vent.
2) "Barrier or Buffer" for Dual Seals - This system feeds a secondary fluid into the space between two mechanical seals, preventing ambient air from contacting the pumped fluid, enhancing cooling, and augmenting safety measures.
It is noteworthy that not every mechanical seal necessitates special external flush configurations.
Innovative Flexible Couplings
In contrast to rigid couplings, flexible couplings are engineered to accommodate certain movements, such as vibrations and thermal expansion, without sustaining damage. This makes them perfectly suited for applications where some alignment discrepancies between the drive and pump shafts are inevitable. Their ability to absorb vibrations efficiently also contributes to a reduction in excessive operational noise. Although these benefits come with a more intricate and costly design, the long-term savings in maintenance, due to the protection they offer to the shaft and bearings from damage and premature wear, are considerable.
Semhai's API standard chemical pumps proudly incorporate the advanced API 671 Standard Disc Couplings.
Our couplings are characterized by lower reaction loads and superior balancing quality compared to standard couplings, enhancing the overall efficiency and effectiveness of the pump's 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
Shanghai Semhai Pump Co., Ltd. has proudly forged enduring alliances with several prestigious, large-scale domestic pump-testing institutions, accentuating our commitment to excellence. Among them are:
The renowned National Quality Supervision and Inspection Center for Industrial Pumps located in Tiexi District, Shengyang City,
The distinguished Irrigation Machinery Products Quality Inspection Center of Machinery Industrial based in Zhenjiang City,
The esteemed Ministry of Agriculture, Water Pump Quality Supervision and Testing Center situated in Chongqing City,
And the highly regarded Shanghai Mechanical and Electrical Products Quality Inspection Center located in the vibrant city of Shanghai.
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