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North Ridge Pumps Ltd
  Date: Friday, November 01, 2019  11/1/2019 10:52:19 PM

Detailed Selling Lead Description

Subject: Vertical Immersion Pump for the Transfer of Sea Water and Fish Waste


One of the difficult processes on fish farms is the discharging of waste products, this is typically a mixture of sea water and fish offal. These are collected in tanks and pumps are installed that transfer the waste away when it reaches a certain level.

We communicated with a fish farm in Scotland as they were having a lot of issues with their current pumps. They were corroding very quickly due to the sea water and were clogging regularly causing the motors to burn out.

After investigation, it was found that the current pumps were not only the incorrect materials but also the incorrect pump type. The cause of the corrosion was due to the original pumps being constructed from cast iron. The recommended material for sea water is bronze, as this is non-ferrous. Cast iron corrodes after even short exposure to sea water.

In addition to this, the existing pumps were standard submersible pumps with semi-open impellers, they were not designed to handle the large solids from the fish offal. The incorrect impeller type was causing the pumps to clog regularly, therefore causing the motors to burn out and leading to large amounts of downtime and maintenance costs.

Due to our experience with applications such as this, we knew the ideal pump type was a vertical immersion pump fitted with a vortex impeller.

Vertical immersion pumps have huge benefits over submersible pumps; they can be constructed from bronze, they are easier to maintain as the motor is situated outside the fluid and these in no risk of fluid entering the motor due to mechanical seal failure.

We selected pumps constructed with bronze casings and impellers to ensure there was no corrosion problems due to the sea water. We also specified vortex impellers as they allow the passage of large solids without the risk of clogging. We then obtained the sump dimensions from the customer and specified a column length of 1000mm to ensure the pump reached the bottom so that the maximum amount of fluid
could be emptied from the sump.

The pumps were subsequently ordered and installed with no issues. The customer has been extremely happy with the results and their maintenance costs have lowered significantly due to the correct material and impeller type selections.

Below are the specifications of the vertical immersion pumps that were installed for this application:

2 Qty Vertical immersion centrifugal pumps
Model: PCV 150/315
Materials: Bronze
Impeller type: Vortex
Pump Connections: DN150
Column length: 1000mm
Flow rate: 350m³/hr
Head: 10m

Company Name: North Ridge Pumps Ltd
Name: Simon Hooton
Address: X-Cel House, Chrysalis Way, Langley Bridge, Eastwood, Nottinghamshire, England. United Kingdom
Telephone: +44 (0) 1773 302 660
e-mail: [email protected]
WEB page: https://www.northridgepumps.com/
Youtube: https://www.youtube.com/channel/UCh6Ma_I8DVkORV75ndS1rrw


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