OMEL centrifugal pumps play a vital role in moving liquids across a wide range of industrial processes. Known for their robust construction, efficiency, and reliability, they are widely used in the chemical, petrochemical, pulp and paper, steel, mining, water and wastewater treatment, and other industries. Designed in accordance with international standards such as ASME B73.1 and API 610, they deliver high performance in applications ranging from moderately to highly complex.
Advantages
- Robust design and construction to international ASME and API standards;
- High hydraulic efficiency, even in demanding applications;
- A variety of models and materials for different fluids and process conditions;
- Easy maintenance: the back pull-out design lets you remove the rotating assembly without disconnecting piping or removing the electric motor;
- Low vibration levels and quiet operation;
- Compatible with single or double mechanical seals and API seal systems;
- Available with closed, semi-open, or open impellers, depending on the application;
- High abrasion and corrosion resistance (ferrous, stainless steel, and special alloys);
- Suitable for a broad range of flow rates and total dynamic heads.
Why Choose OMEL Centrifugal Pumps?
- Efficiency and Reliability: Manufactured using advanced technology, OMEL pumps deliver superior performance and long service life.
- Application Versatility: Designed for everything from simple processes to critical applications involving aggressive, abrasive, or high-temperature fluids.
- Easy Maintenance: An intelligent disassembly design reduces downtime and maintenance costs.
- Specialized Technical Support: OMEL offers comprehensive support, from equipment selection to after-sales service, for maximum system efficiency.
Comparing Open, Semi-Open, and Closed Impellers
| Feature | Open / semi-open impeller | Closed impeller |
| Main advantage | Better passage of solids, fibers, and particle-laden liquids | Higher hydraulic efficiency |
| Main disadvantage | Lower efficiency and greater sensitivity to wear and clearance | Higher risk of clogging with solids |
| Liquids containing solids | Highly recommended | Less suitable |
| Clean liquids | Can be used, but is not ideal | Ideal |
| Maintenance | Easier to clean and inspect | More labor-intensive |
| Wear | Clearance may increase rapidly, reducing performance | Generally maintains performance better |
| Manufacturing complexity | Generally simpler | More complex |
UND Series
UND/III
Process pumps designed to meet the requirements of ASME B73.1. They feature a volute casing, semi-open impeller, and enlarged seal chamber. Optional features include hydrodynamic sealing, heating jackets, and more. Standard back pull-out design.
With its thicker volute casing, this pump is an ideal choice for process fluids, particularly in the fertilizer industry, sugar and ethanol plants, the pulp and paper industry, and the chemical industry in general.
Capacity: up to 1,700 m³/h
Total dynamic head: up to 210 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C (special configurations up to 350°C)
Pressure: up to 26 bar
UND/III-AE
Self-priming process pumps with a volute casing, semi-open impeller, air-separation chamber, and full priming capability. They do not require a check valve on the suction line. A mechanical seal is provided as standard. Standard back pull-out design.
Capacity: up to 350 m³/h
Total dynamic head: up to 120 m
Total effective suction lift: up to 6 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C (special configurations up to 350°C)
Pressure: up to 26 bar
UND/III-VR
Process pumps with a volute casing and vortex impeller (recessed impeller). They operate on the torque-flow principle. Standard back pull-out design.
Thanks to their recessed impeller design and robust construction, these pumps are ideal for wastewater treatment plants and for pumping sugarcane mill juice containing fine bagasse particles.
Capacity: up to 1,200 m³/h
Total dynamic head: up to 75 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C (special configurations up to 350°C)
Pressure: up to 26 bar
UND/II-IL
Process pumps with a volute casing and semi-open impeller, designed and manufactured to meet ASME B73.2 requirements. Suction and discharge are arranged on the same horizontal line, with independent bearing support. They eliminate the need for costly baseplates and foundations and avoid motor-to-pump alignment problems. Optional features include heating jackets.
These pumps are used where space is a major consideration, such as in certain chemical plants and offshore oil production platforms (please request further information if needed).
Capacity: up to 350 m³/h
Total dynamic head: up to 210 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C
Pressure: up to 25.5 bar
UND/II-VT
Process pumps with a volute casing and semi-open impeller, available with shaft lengths of up to 6 m. Optional configurations are available for heating and pumping molten salts, sulfur, and low-melting-point products. These vertical pumps normally use the hydraulic design of UND/III pumps, but can also be configured with the vortex hydraulics of the UND/III-VR models.
These pumps are highly versatile and can be used to drain effluent sumps in the chemical and petrochemical industries.
Capacity: up to 1,000 m³/h
Total dynamic head: up to 110 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C
UND/II-MAG
Process pumps with a volute casing and semi-open impeller, designed to meet ASME B73.3. The magnetic drive eliminates the need for shaft sealing systems, preventing associated seal failures and leaks. They use the same hydraulic design as UND/III pumps.
Where shaft sealing presents a challenge, these pumps may, depending on the application, be used to handle toxic fluids or fluids hazardous to human health or the environment.
Capacity: up to 300 m³/h
Total dynamic head: up to 200 m
Maximum speed: 3,600 rpm
Temperature: up to 300°C
HDR Series
HDR API 610 (OH2)
Heavy-duty centrifugal process pumps with a volute casing and closed impeller, designed to meet the requirements of the latest edition of API 610. Centerline-mounted configuration with centerline discharge and a back pull-out design. An exceptionally low L³/D⁴ ratio minimizes shaft deflection in the seal area. Also available in an in-line OH3 version (HDR/IL) and a vertical sump-pump version (API 610 VS4).
These pumps meet most fluid-transfer requirements in petroleum refineries and petrochemical facilities.
Capacity: up to 1,000 m³/h
Total dynamic head: up to 350 m
Maximum speed: 3,600 rpm
Temperature: -100°C to +400°C
Pressure: up to 80 bar
The figure below shows an assembly of two OMEL HDR pumps with thermal insulation around their volute casings to maintain the fluid at the required pumping temperature while minimizing heat transfer.
HDRP (OH2)
Centrifugal process pumps designed to meet the requirements of the latest edition of API 610, specifically for continuous operation at low flow rates and very high total dynamic heads. They are also available in an in-line OH3 version (HDRP/IL) and a vertical sump-pump version (API 610 VS4). Heating jackets can be provided upon request.
In some cases, they can replace ANSI B73.1 pumps, depending on process requirements.
Capacity: 0.25 to 25 m³/h
Total dynamic head: up to 300 m
Maximum speed: 3,600 rpm
Temperature: -100°C to +400°C
Pressure: up to 51 bar
HDRP/D (BB2)
Heavy-duty, two-stage centrifugal process pumps designed for high-pressure, high-temperature applications at extremely low flow rates. They comply with the latest edition of API 610 and feature two low-flow impellers mounted between bearings in a centerline-mounted BB2 configuration.
In some cases, they can replace ANSI B73.1 pumps, depending on process requirements.
Capacity: 1.5 m³/h to 24 m³/h
Total dynamic head: 630 mWC
Maximum speed: 3,600 rpm
Temperature: up to 400°C
Pressure: up to 70 bar
HDR/VT (VS4)
HDR/VT VS4 vertical pumps offer high efficiency, excellent performance, and a long mean time between failures (MTBF), providing reliability even under the most demanding process conditions.
Capacity: up to 1,000 m³/h
Total dynamic head: up to 150 m
Maximum speed: 3,600 rpm
Temperature: up to 260°C
Pressure: up to 80 bar
HDR/IL
Process pumps with a volute casing and closed impeller, designed and manufactured to meet API 610 requirements. Suction and discharge are arranged on the same horizontal line, with independent bearing support. They eliminate the need for costly baseplates and foundations and avoid motor-to-pump alignment problems. Optional features include heating jackets and thermal insulation. Bearing housing lubrication options include grease, oil bath, and oil mist.
BFA
BFA axial-flow pumps are specified for high-capacity, low-head applications, particularly those involving corrosive and abrasive fluids. They provide high efficiency, excellent performance, and reliable operation under the most demanding process conditions. They can be manufactured from a wide range of materials to suit diverse applications. The chart below illustrates their hydraulic operating range:
Genuine Spare Parts and Technical Service
Using genuine replacement parts helps keep industrial processes running without unexpected shutdowns. This increases productivity and profitability while ensuring that equipment remains fully functional and in good operating condition.
OMEL Technical Service: Have Your OMEL Pump Serviced by Its Manufacturer!
By choosing genuine parts and specialized factory technical service, companies benefit from assured product quality, safety, and durability.
The importance of regular preventive maintenance should be emphasized. By identifying and correcting problems early, companies can avoid more complex and costly repairs in the future, as well as secondary damage resulting from equipment failure. Corrective maintenance enables a rapid response to restore equipment to normal operation, minimizing downtime and reducing the impact on production and related operations.
Unauthorized repair shops may not take the necessary precautions when servicing OMEL pumps or blowers. Unsuitable, out-of-tolerance parts or parts with excessive clearances may be reused, reducing equipment performance. Customers often do not realize this is happening, and their processes lose efficiency, resulting in significant financial losses.
With OMEL Technical Service, your company benefits from:
- Factory warranty;
- Trained and specialized technical staff;
- Comprehensive diagnostic reports identifying parts that need replacement;
- High-quality materials manufactured using precise machining and assembly processes;
- Support from OMEL’s product engineering team;
- Product histories and datasheets linked to the serial numbers of equipment sold;
- Equipment performance checks on OMEL’s own test benches before delivery to the customer.
Investing in preventive and corrective maintenance and using genuine OMEL parts helps ensure efficient, safe, and long-lasting equipment operation, prevents unnecessary production downtime, and reduces costs in the medium and long term.
Main Components
Investing in preventive and corrective maintenance and using genuine OMEL parts helps ensure efficient, safe, and long-lasting equipment operation, prevents unnecessary production downtime, and reduces costs in the medium and long term.
HDR Series
UND/II-VT Series
UND/III Series
Need a Centrifugal Pump for Your Operation?
OMEL combines engineering expertise and experience to develop centrifugal pumps, metering pumps, vacuum pumps, blowers, rotameters, and pinch valves to meet the requirements of a wide range of industrial processes and sectors.
Contact our specialists! They are ready to help you choose the right centrifugal pump for your application.
