VERTICAL PUMPS

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CENTRIFUGAL PUMPS- VERTICAL PUMPS

A Vertical Pump is one whose shaft is in vertical position w.r.t ground; it is always an overhang and of radial-split case type design. It requires a smaller footprint and is suitable for installation where the ground surface area is limited.

Vertical pumps are a special class of pumps used in many different applications from water and utility services to process and exotic applications. They can be used in a range of operating temperatures from low to high, with varying pressures and with many liquids ranging from ordinary water services to corrosive, flammable and even difficult process liquids and chemicals. 

What is vertical inline pump?
What is an vertical in-line pump? A type of centrifugal pump that has a vertically oriented shaft, with the suction and discharge connections in the casing in line with each other, rather than requiring a change of direction like end suction pumps. Vertical inline pumps have been used in small pumping systems. They are known as overhung type 3 or OH3 pumps. OH3 pumps are single-stage overhung pumps with suction and discharge connections that have a common centerline and a bearing housing integral with the pump to absorb pump nozzle loads. The pump’s driver is usually mounted on a support integral to the pump, and the pump and its drivers are usually flexibly coupled. This type of pump is tall, so for stability and good operation, the ratio of the unit’s center of gravity height to the contact surface width is usually limited to 2.5 or 3 (height/width). Generally, stability can be achieved through a good design of the casing (low ratio) or by a permanent external stand.
 
 What is the difference between horizontal and vertical pumps? 
The primary difference between these two pumps is in the shape and position of the shaft. As the name implies, the horizontal centrifugal inline pump has a shaft that is placed horizontally. … On the other hand, the vertical inline pump has a shaft that is positioned vertically.
 
A Vertical Centrifugal Pump is also referred to as cantilever pumps. They utilize a unique shaft and bearing support configuration that allows the volute to hang in the sump while the bearings are outside the sump. This style of pump uses no stuffing box to seal the shaft but instead utilizes a “throttle bushing”.
 
Two common categories of vertical pumps are vertically suspended (VS) pumps and vertical inline pumps (overhung, OH).
PUMPWORKS PWI OH4 VERTICAL IN-LINE PUMP (API 610)

ADVANTAGES

 

– cheaper than horizontal pumps

– smaller footprint and more compact

– require low NPSH

– lighter

DISADVANTAGES

 

– require more headroom

– maintenance can be challenging

– reports of high vibration including frequent failures are common, especially for medium and large VS pumps.

 

 

** Many of Pump Projects Centrifugal Pumps are a combination of multiple Centrifugal Pump types. For example and End Suction Pump (Between Bearing) that has a Closed Impeller. **

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