Available Sizes

performance and incapable of meeting expectations. During the development phases of the ‘SA’ range, Sub-Atlantic evaluated various competitors’ thruster products. We found that the actual test results and weights proved to be vastly different from the data claimed in their technical publications. Sub-Atlantic therefore introduced a policy to ensure that all our own test performance data was witnessed by a reputable third party certi cation organisation (DNV). It is this commitment and con dence in our product that will give you peace-of-mind. Remember and ask for independently witnessed test data before you purchase your system or better still, test it yourself. quick and easy removal of air during commissioning and operation. Standard range is available in four propeller sizes, SA300, SA380, SA420 & SA500, the designation represents the diameter of the propeller in millimetres. Standard motor sizes are 20, 30, 41, 61, 103 and 119 cc. Our hydraulic motors all have identical mounting interfaces to the thruster body, no matter the motor displacement. This makes them particularly suitable for interchanging with different propeller sizes to obtain higher running efficiencies. For example, in an application where limited hydraulic power and oil ow is available but maximum thrust is required, an SA-380 thruster (which normally uses a 40cc motor) can be simply tted with a 30cc motor and used instead of a SA300-30. By using the larger propeller, increased ef ciency can be achieved without the requirement for more oil ow. SA300, SA380 and SA420 units are generally used on work Rovs, SA420 and SA500 generally for cable ROVs. Options of motor displacement, propeller size, motor manufacturer and mounting style can also be supplied. In certain cases, we can produce specials to customer’s requirements.

Bearing Life

Heavy duty taper roller bearings are used to provide long a working life.

SA-300/1002-(20 or 30cc)

This is a version of the SA300 with special mountings to t Innerspace 1002 brackets. This is a particularly useful option for carrying out a quick retro t on ROV frames with permanently welded thruster brackets.

Forward/Reverse Efficiency Thruster Guards

Economical, ef cient and lightweight guards are now available in strong injection moulded plastic. Comparing input power to the output thrust, our forward and reverse thrust curves fall within a 5% band. This is important in a typical vectored configuration as the overall system performance will only be as good as the average forward/reverse thrust. For the same power input, performance exceeds other thrusters on the market.

Innovative Shaft Sealing

Thrusters incorporate our proven ceramic wear ring technology. The ceramic ring provides a durable hard surface that prevents wear to shaft and the resultant seal damage and ooding.

Engineer’s Selection Manual

Our publication, ‘Hydraulic Propulsion Selection Manual for Engineers’ provides extensive data required for the correct selection of your thruster system. It includes thruster pressure/flow curves for different current velocities, installation details, drawings, etc. Download this valuable document from our website or request a copy

Quick Change Seal Carrier

Seals are mounted in a carrier that can be changed in minutes to minimise vehicle downtime.

DNV Witnessed Test Data Propulsion Components

When selecting hydraulic propulsion thrusters for an underwater vehicle design, many highly important considerations such as efficiency, pressure and flow, weight, size and forward/reverse characteristics must be taken into account. Failure to correctly interpret these or to use inaccurate data will result in a system with inferior We also supply HPUs up to 280 kW / 375 HP, thruster control packs and a range of compensators to complete your propulsion system.

Easy Air Bleeding

Thruster bodied include ve specialially located bleed screws for
Hydraulic Thrusters (24 Oct 2007) Page 2