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An overhung centrifugal pump, also known as an OH3 pump, is a flexibly coupled single-stage and in-line pump with an overhung impeller. This type of pump is commonly used in various industrial applications due to its efficiency and reliability. The overhung design refers to the impeller being located at the end of the pump shaft, with no bearings supporting it on the impeller side. Instead, the pump relies on a separate bearing bracket to support the shaft and impeller.
The image shown here is OH1 (Overhung) type API 610 Centrifugal pump types. This is a single-stage overhung with a foot-mounted base plate design. It is a horizontal pump with a flexible coupling. You can see in the image that the leg supports it at the opposite end of the suction. All API Pump Image Sources –
Overhung Pump vs Between Bearing Pump
One of the key differences between an overhung centrifugal pump and a between bearing pump is the location of the impeller in relation to the bearings. In an overhung pump, the impeller is located at the end of the pump shaft, while in a between bearing pump, the impeller is located between two sets of bearings. This difference in design has implications for the pump's performance, maintenance requirements, and overall efficiency.
API 610 12th Edition PDF Free Download
The American Petroleum Institute (API) 610 is a widely recognized standard for centrifugal pumps used in the oil and gas industry. The 12th edition of the API 610 standard provides guidelines for the design, construction, and operation of centrifugal pumps, including overhung centrifugal pumps. The API 610 12th edition PDF is available for free download from the API's website, making it accessible to engineers and pump manufacturers looking to comply with the industry standards.
Overhung Horizontal Centrifugal Pumps
Overhung horizontal centrifugal pumps are commonly used in applications where space is limited, and a compact pump design is required. These pumps feature a horizontal shaft with the impeller located at one end, making them suitable for inline installations. Overhung horizontal centrifugal pumps are often used in HVAC systems, water treatment plants, and industrial processes where a reliable and efficient pumping solution is needed.
Axially Split vs Radially Pump
When it comes to centrifugal pumps, there are two main types of pump casings: axially split and radially split. Axially split pumps have a casing that is split along the axis of the pump shaft, allowing for easy access to the internal components for maintenance and repair. On the other hand, radially split pumps have a casing that is split perpendicular to the pump shaft, providing a different set of advantages and limitations. The choice between axially split and radially split pumps depends on the specific application requirements and operating conditions.
Centrifugal Pump Overhung Type
The overhung type of centrifugal pump refers to the design where the impeller is located at one end of the pump shaft, without any bearings supporting it on the impeller side. This design is commonly used in applications where space is limited and a compact pump design is required. Overhung centrifugal pumps are known for their simplicity, ease of maintenance, and cost-effectiveness, making them a popular choice for various industrial applications.
Overhung Pump Diagram
A typical diagram of an overhung centrifugal pump includes the pump casing, impeller, shaft, bearings, and motor. The impeller is mounted at the end of the shaft, with the bearings supporting the shaft on the non-impeller side. The motor is directly mounted to the pump, providing a compact and efficient pumping solution. The overhung pump diagram illustrates the basic components and flow path of the pump, highlighting the key features of this type of centrifugal pump design.
API 610 Latest Edition PDF Free Download
The latest edition of the API 610 standard provides updated guidelines and requirements for centrifugal pumps used in the oil and gas industry. The API 610 latest edition PDF is available for free download from the API's website, ensuring that engineers and pump manufacturers have access to the most current industry standards and best practices. Staying up to date with the latest edition of the API 610 standard is essential for ensuring the safe and reliable operation of centrifugal pumps in critical applications.
What is an Overhung Pump
This type of pump is centerline supported. You can see that there is no leg support at the bearing end as compared to the OH1 type in the image below. It is also single stage end suction pump with single bearing housing. During
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overhung centrifugal pump|axially split vs radially pump