Seawater Cooling of Subsea Oil Rig Winch - Long Coupled Centrifugal Pumps

Enquiry

A subsea oil and gas company contacted us with an enquiry for five sea water cooling pumps for use on their oil and gas rig, to cool the winches that are continuously used. They needed these pumps on a quicker than the usual 6-8 week lead time that most bespoke manufactured pumps run at.

Equipment supplied

5 x Azcue AN long coupled end suction centrifugal pumps

• Type: AN 40/250
• Long coupled
• Fluid: Sea water
• 18m³/hr at 25m head
• Bronze casing and impeller
• S/discharge Ø: 65/40
• 1750RPM, 3.5Kw
• 440V/3Ph/60Hz

Solution

The natural choice of pump when pumping water is a centrifugal pump. We supplied these centrifugal pumps in bronze, ensuring all wetted parts that come into contact with the seawater are non-ferrous and will not corrode overtime. The long coupled design of the AN model separates the pump from the motor allowing easier maintenance and also reducies the risk of any fluid entering the motor in the event of a mechanical seal failure. We specified these sea water pumps to be fitted with 4 pole motors running at 1750RPM - the slower motor speed reduces the wear on the pump in the long term making them perfect for 24/7 applications such as this.

As we offer a fast production on selected Azcue pumps, we were able to get these five sea water pumps manufactured and delivered to the customer in just over 4 weeks.