PTO firepump

Many workboats and dredging vessels require large hydraulic pumps for their operations, as well as fire pumps for emergency situations Many workboats and dredging vessels require large hydraulic pumps for their operations, as well as fire pumps for emergency situations

When one powertrain manufacturer designed a remote Power Take Off (PTO) solution which would allow pumps to run from the main engine - thus eliminating the need for a secondary engine - there was immediate interest. At the heart of the new design was a clutch from Warner Electric.

In the offshore, marine and oil and gas sectors many workboats and dredging vessels require large hydraulic pumps for their operations, as well as fire pumps for emergency situations. These pumps often require between 300 and 500hp to operate, meaning that they are often run from secondary engines. Not only is this an inefficient solution, there is also an inherent delay as the engine comes up to speed which could be catastrophic in an emergency situation.

According to Warner Electric the pumps have to be run in this way because of an inherent shortcoming in remote Power Take-Off (PTO) systems for diesel engines. This shortcoming was identified by a leading marine and industrial powertrain manufacturer who noted that most transmissions have one or more PTO locations, but these only allow for a fraction of the transmission’s capacity to be transferred and often offer a limited footprint for ancillary equipment. If a more efficient solution could be designed then, for many applications, the pumps could be run from the primary engine – a far more efficient solution.

The assembly is designed to be driven from the front of the crankshaft, enabling it to run general purpose hydraulic pump drives, fire pump drives and other secondary drives from the primary motor. Part of the design required a remote operated clutch with proven reliability in the harsh marine environment. The manufacturers approached Warner Electric, part of Altra Industrial Motion, for a solution. The SFC-1525 stationary field clutch was selected due its size and design, remote electrical activation and reputation for reliability offshore.

A spokesman for the manufacturer commented: “Finding a remote clutch that met our performance requirements and also fitted to the necessary footprint was key to the project. Warner Electric was one of the few manufacturers that was able to deliver on all of our requirements, and when we started looking at reliability records and service support it was obvious that they represented the best value for money.

“The remote PTO has proven to be extremely popular, especially as many boats are currently undergoing upgrades to more fuel efficient engines and our system allows them to continue to operate secondary drives from these.

“Because the PTO is driven from the crankshaft it is driven in a left hand rotation; this isn’t a problem for most pumping applications as all hydraulic pumps and most fire pumps are available in this configuration. For other applications which require right hand rotation, an integral parallel shaft gearbox is available – this is possible thanks to the small footprint of the Warner Electric SFC-1525 stationary field clutch.”

The remote PTO has now been commissioned on many different vessels operating around the world. The clutch can be engaged in about a second, giving the crew almost instant access to the secondary systems driven by the PTO.

By Jake Frith

Latest Press Releases

Damen hosts keel-laying celebration for Hanson’s Marine Aggregate Dredger

On 3rd October, Damen Shipyards Galati hosted a celebration marking the keel-laying of a Damen Marin... Read more

Close Collaboration Between Strathclyde University and Datum Electronics To Propel New Condition Monitoring Technology

We are pleased to announce a new Knowledge Transfer Partnership (KTP) with Strathclyde University, a... Read more

Albwardy Damen wins Shipyard of the Year Award at the 16th Seatrade Maritime Awards Middle East

Albwardy Damen has been presented with the Shipyard of the Year Award at a glittering ceremony that ... Read more

Damen signs with Port Authority of Jamaica for Utility Vessel 3911

On 21st August, Damen Shipyards Group signed a contract with the Port Authority of Jamaica (PAJAM) f... Read more

Damen completes maintenance work on Innovation at Damen Verolme Rotterdam

Heavy-lift jack-up vessel Innovation, one of DEME’s DP2 installation vessels, left Damen Verolme Rot... Read more

SAAM Towage contracts Damen for delivery of tug vessel

In August 2019 Damen Shipyards Group signed a contract with SAAM Towage for the delivery of an ASD T... Read more

View all