Silvercrest / SME are the worlds premier supplier of submersible motors, subsea motors and ROV motors.

 SUBMERSIBLE MOTORS,  ROV MOTORS, SUBSEA MOTORS for sale.

Silvercrest/SME specialize in the bespoke manufacturing of submersible motors, Rov motors,

and subsea motors, also pumps for use on Rovs, subsea trenchers, subsea ploughs, dredgers

and water lift pump systems. For use in the offshore Oil and Gas and Telecommunications

industries. We offer a range of submersible, subsea and Rov motors (5hp to 1500hp) for use in

the more popular classes of subsea ploughs and Rovs. All of these motors are available in

either SS316 or with a hard anodized aluminium finish. 

We can offer subsea motors with a wide range of speeds and voltages (including 3000v,

6000v and 10,000v)

We can design and build motors to suit your individual and special project requirements. 

We refurbish and service a wide range of submersible motors. 

Our product is excellent, our prices very competitive, and our delivery

schedule the best in the industry.

CONTACT US TODAY TO DISCUSS YOUR SUBSEA MOTOR REQUIREMENTS.

We recently delivered ten 260kW, 3000VAC, double ended, 2 pole, stainless steel bodied motors

to CTC Marine Projects Ltd, for use on their fleet of sub-sea trenchers. This was a bespoke order

that was completed in just six weeks from receipt of order. 

Silvercrest/SME have manufactured and supplied six 400kw ROV20-4 motors,

4-pole/3300vac/3 phase/60hz, stainless steel construction. Single ended for fitment with

Sauer  hydraulic pumps Series-90-L250. Rated for 3000m depth operations.

Also three ROV204 submersible motors (300kw/4 pole/3300vac/3 phase/60hz) with stainless steel

construction, and double ended for fitment with Sauer hydraulic pumps to SMD-Hydrovision.

Together with 7.5kw motors for Rov cursor application.

SME has also manufactured a total of seven (7)  6600V motors todate, for three different

offshore contracts. Petronas Dulang and Angsi Platforms. Star Energy KG Platform.

We manufacture and rebuild very large submersible motors for a range of other offshore and

subsea companies. These include:Global Marine, CTC, Sonsub, Star Energy, Sulzer Wood, Sulzer, Fugro, Apache, BHP Billiton, Petronas, SMD, Exxon Mobile, Chevron, Perry Slingsby, Subsea7,

Bayu Purnama, ISE Ltd, Saudi Aramco, Woodside, PXP.

260kW Silvercrest/SME Pump Motor under construction.

Silvercrest/SME will bespoke manufacture virtually any shape and size of submersible motor

required for subsea operations.

We will be very happy to discuss the details of your  subsea motor / pump requirements in order

to produce a detailed technical quote for you.

Silvercrest / SME design and build specialized subsea motors, and support packages for use on

all types of Rovs and underwater vehicles  in the offshore and subsea industry. These

submersible motors are usually made to order and vary from 1kW to 1500kW,

400 to 4160 Volts. 50 or 60 Hz, 2-Pole to 8-Pole.

There are two common methods of construction available: -

Stainless steel construction, or Marine Grade aluminium that is Black anodised to resist

corrosion. These motors are usually oil filled and pressure compensated. Common operating

voltages are between 300 volts and 3300 volts - even for small 5kW motors.

6,000vac and 11,000vac motors also available by special request.

Certain subsea motors can operate down to depths of 10,000 meters.

SME manufactures new Submersible, Subsea, and Rov motors. 

SME also rewinds, services and repairs all brands of Subsea, Submersible and Rov motors.

Including Hitachi, Pleuger, Grundfos, Mercury, Byron Jackson, Haywood Tyler, and Franklin. 

Silvercrest/SME is a leading manufacturer of high quality submersible motors and pumps,

designed specifically for subsea operations

Silvercrest/SME specialize in the bespoke manufacturing of submersible motors, pumps and

ancillary equipment for use on Rovs, subsea trenchers, subsea ploughs, dredgers and water lift

pump systems, for use in the offshore Oil and Gas and Telecommunications industries.

75HP Rov Subsea Motor.

We manufacture our own laminations, designed specifically to meet the individual requirements

of each customer. We do not buy off the shelf standard rotor sets and fit them in a housing, as

some other manufacturers will often do. As a result our motors are more efficient and generally

ightly smaller, in both diameter and length, than our nearest competitors for any given power

rating. 

Silvercrest also offer a range of ‘standard’ motors for use in well-established underwater 

installations, such as the more popular classes of Rov and subsea ploughs.

SILVERCREST / SME offer:

Repair and rewind of large high voltage (500kW. 6600V) submersible electric subsea motors.

High Temperature Submersible subsea motors in 6-inch to 20-inch frames suitable for operation in

ambient temperatures of 75 Degrees.C

High Voltage water filled submersible subsea motors (3300V, 4160V and 6600V).

Upgraded Temperature Monitoring units available with new improved user-friendly parameter

setting.

ROV and subsea submersible motors suitable for depths of 4000m.

WD Series sump-pump motors.

Subsea Electric Generators for Tidal Generation.

Induction Generators or slow speed Permanent Magnet Synchronous Generators up to 500k.

Heat Exchanger Motors.

We now offer a complete range of water filled, watertight, submersible subsea motors with

integral heat exchangers in 10-inch, 12-inch, 14-inch and 16-inch size for 2 pole and 4 pole speeds.

These subsea motors offer a significantly lower temperature rise when compared with standard

submersible subsea motors. This is an advantage that can be utilized when customers want to

operate in water with a high ambient temperature, or when there will be minimal cooling water

flow available. Even with the standard applications the lower temperature rise will extend the

life of the motor significantly. There is an accepted rule of thumb for electrical insulation

that its life is shortened by one-half for every 10°C increase in operating temperature. The

winding operating temperature for a normal water filled submersible motor is about

70 degrees.C, in 25 degree.C water. However an SME Heat Exchanger Motor will be

running at about 45 degree.C. (This is 25 degrees cooler). This magnitude of difference in

temperature rise will have a significant positive impact on motor life.

The basic design principle for these subsea motors is to circulate the internal water in the motor

remove the heat from the "active" parts of the motor, and then pass it through a heat exchanger

which brings the internal water back to somewhere close to the external ambient water

temperature - before feeding it back through the "active" parts again to remove more

heat.  The heat exchanger increases the external surface area of the motor by 50% and the

water circulation allows the heat to dissipate more evenly and quickly out of the subsea motor

and into the external water. The small impeller inside the subsea motor that circulates the

water has an insignificant impact on the motor efficiency in terms of additional load, while the

subsea motor has an improved efficiency because the stator and rotor copper losses are reduced

due to the lower operating temperature.

Motor Thermal Protection Unit

All SME Heat Exchanger Motors come with four (4) PT100 temperature sensors installed in the

motor.

One PT100 is attached to the thrust bearing assembly that will detect excessive thrust loads

and overheating in the thrust bearing.

One PT100 is installed in the end winding on the non-drive end of the motor.

One is installed half way down the slot in the winding in the middle of the motor.

One is installed in the end winding on the drive end of the motor.

SME can offer one temperature protection unit (SME4TM) to monitor all four PT100'S installed

in the Heat Exchanger Motor.

Water Pump Motors.

Our water pump motors are not vertically oriented, water filled, down hole pump motors, as has

previously been the norm throughout the subsea industry. Silvercrest/SME motors are

substantial oil filled submersible motors, designed to run in the horizontal axis with a large

thrust bearing assembly to withstand water pump loads.

We can offer specially designed turbine pumps to match our motors. Again these pumps are not

the usual vertically oriented type, these are specifically designed with a twin bearing

arrangement, for use in the horizontal axis. Thus dramatically extending operational life and

improving pump reliability.

Silvercrest recently delivered ten 260kW, 3000VAC, double ended, 2 pole, stainless steel bodied

motors to CTC Marine Projects Ltd. The motors will be used by CTC on their subsea plough and

trenching vehicles worldwide. This was a bespoke order that was completed in six weeks from

receipt of order, ex-works from our manufacturing facility in Australia.

The 260kW/ 3000V / 60Hz / 2 pole pump motors (designed specifically for use in the horizontal

axis) were fitted with shafts at both ends, in order to mate with three tandem mounted

hydraulic pumps on one end and a Hayward Tyler M6 single stage water pump-set on the

opposite end. In this 260kW model, rather than using the pivot shoe arrangement, typical of

vertically oriented pump-sets, heavy duty tapered roller bearings were fitted to the rotor to

manage the water pump induced end-loads. Thus giving a calculated bearing life in excess of

11,000 hours, even when used in the horizontal axis. Depth rating on each motor is 10,000

meters, with oil filled compensation. Motor housings are 316 stainless steel, with Mylar coated

windings (the ultimate in winding coating technology) being used in each motor at the request of

CTC, giving an insulation rating of >16kV at a temperature of 140 degrees C. 

Rov and Subsea Plough and Trencher Motors.

Silvercrest  offer an established range of Rov motors ranging from 5HP to 500HP. All of these motors

are available in either SS316 or Hard Anodized Aluminium finish. We will also design and build

submersible motors to suit your individual requirements and subsea project.

Our motors are in use with most of the major operators worldwide such as Saipem, SMD Hydrovision,

Sonsub, CTC Marine Projects, Impresub, Fugro, Thales, MTQ, LD Travocean and Canyon Offshore.

100HP Aluminium Bodied ROV HPU Motor.

        75HP Plough Motor.                                                                11.kW  Submarine Thruster.

      400Kw Motor/3000vac for Subsea Trencher.

Motor-pump sets (depth rated to 3000m) for subsea trenching operations.

Silvercrest/SME has recently manufactured and supplied two 265kw motor-pump sets for

SMD-Hydrovision (England). The package comprised 265kw subsea motors, 2-pole, 3000v, 3ph, 60hz.

Together with Jetting Pumps (wet end only, operating at 2-pole, 60 hertz). The motors were a stainless

steel construction, and the pumps Zinc Free Bronze. These motor-pump sets will be installed onto one of

the world’s largest subsea trenching vehicles.

In addition, Silvercrest /SME has manufactured and delivered in just eight weeks from order, two water

turbine pumps to CTC Marine Projects based in Teeside (England). The pumps will be used by CTC, in

conjunction with Silvercrest/SME submersible 260Kw motors, on their subsea plough and trenching

vehicles worldwide.

The two Silvercrest SH-M6R submersible pumps with a 231mm OD impeller and a nominal operating

speed of 3600rpm will be used as an alternative to the Hayward Tyler model M6-1 stage CI/BR/SS

submersible pump.

The Silvercrest pump although matching the performance of the Hayward Tyler unit, is specifically

designed for horizontal operation providing a greatly increased reliability for use in horizontal and

downward angled operation.
 
Construction materials:
Pump Castings                              - AS1830/T260 Grey Cast Iron.
Impeller Casting                            - PB1 Zinc Free Bronze.
Pump Shaft                                   - SAF2205 Grade Stainless Steel
Shaft Bearings                              - PB1 zinc free bronze casing. Splined natural rubber.
Upthrust Bearing                           - PB1 Zinc Free Bronze.
Maximum Pump Thrust               - 1470kg at Shut-Off.

Silvercrest will bespoke manufacture virtually any shape and size of submersible motor and

submersible pump required for subsea operations.

SPECIFICATIONS FOR SME SUBSEA ELECTRIC MOTORS.

SUBSEA MOTORS and ROV MOTORS.
SME are designing and building specialized motors for use SUBSEA for the offshore industry. These motors are usually made to order and vary from 1kW to 600kW, from 400 to 4160 Volts, 50 or 60 Hz, 2-Pole or 4- Pole. There are two common methods of construction - stainless steel construction or Marine Grade aluminium that is Black anodized to resist corrosion. These motors are usually oil filled and pressure compensated and the common operating voltages are between 2300 volts and 3300 volts - even for small 5kW motors. Some of these motors operate at depths down to 4000 meters.

SILVERCREST / SME MOTORS FOR OUR SUBSEA CLIENTS.

ROV submersible motors

We are pleased to be able to offer a replacement motor to meet your specific requirements.

Volts                                  3000VAC

Poles                                  2

Speed                                3450 RPM

Full Load Torque            769Nm

Start Torque                     1187Nm           

Depth     Rating                   3000 Mts

Compensation                  Oil filled - external compensator (not included)

Housing                            316 Stainless Steel

Mounting                          Vertical

Shaft                                  Spec to be advised

KW                                   290kW @60 Hz

HP                                     390HP @ 60Hz

Weight                               404kG max

Length                                1000mm max

SME 36-inch, 550kW -540HP, 4 Pole, 10000/3/50, Super Duplex Construction.
Submersible Motor.

 SME 36-inch, 1100kW-1475HP, 4 Pole, 10000/3/50, Super Duplex Construction
Submersible Motor.

SME 36inch, 2200kW, 6 Pole, 6600/3/60Hz submersible motors

SME 36 inch, 1800kW, 4 Pole, 6600/3/60Hz Submersible Motor

SME 36 inch, 1000kW, 8 Pole, 6600/3/60Hz, Submersible Motor

55HP hydraulic power pack motors.

ROV 14-55HP, 3000V, 60Hz, 4 Pole Motor (with pump attached).

Final dimensions and shaft arrangement to be confirmed by customer, foot mountings are adjustable and can be manufactured to

suit customer requirement.

Volts                                  3300VAC / 60hz / Three Phase 

Poles                                  4

Speed                                1750 RPM

Depth Rating                     3000 Meters nominal

Compensation                   Oil filled - external compensator

Housing                              316 SS or Hard Anodized Aluminium.

Mounting                          Horizontal

Shaft                                 TBC

KW                                   41kW @ 60 Hz

Insulation Rating             >16kV @ 140 deg C (Mylar)

Shaft Seals                        Bergman mechanical seals. 

300 kW PUMP MOTORS.

We can offer you submersible motors with the following specification: - 

Volts                                  3300VAC / 60hz / Three Phase 

Poles                                  2

Speed                                3500 RPM

Depth     Rating                 3000 Mts nominal

Compensation                   Oil filled - external cooler/compensator included

Housing                             316 SS

Mounting                          Vertical (As per details to be supplied)

Shaft                                 See above  (As per details to be supplied)

KW                                   300kW @ 60 Hz

Insulation Rating             >16kV @ 140 deg C (Mylar)

Shaft Seals                        Bergman mechanical seals. 

Single pump motor to replace a Hayward Tyler Sumo 260kW motor.

We can offer the ROV14 motor with shafts at both ends; to mate with 3 x tandem mounted hydraulic pumps on one end, and a

2-stage Plueger MI16 water pumpset on the opposite end. The female spline can be manufactured to mate with the supplied

pumpset.

Our purpose built pump motors are designed specifically for use in the horizontal axis.  Unlike a down hole pump motor such as

the HT Sumo, our motors do not use pivot shoe thrust assemblies.  As a result our motors are compensated for depth pressure

using oil rather than distilled water as in the case of down hole pump motors.

Unlike most motor manufacturers, we manufacture our own core laminations on site, affording maximum flexibility in design. 

We can bespoke manufacture virtually any shape of motor you may require.

In this 260kW model, rather than use the pivot shoe arrangement, we fit heavy-duty tapered roller bearings to the rotor to

manage the water pump induced end loads.  Thus increasing the reliability and service life of the motor by a factor of 10 or more

when used in the horizontal axis.

Our superior Mylar coated windings are the ultimate in winding coating technology.  Mylar coated windings have an insulation

rating of >16kV at a temperature of 140 degs C.  No other winding coating even comes close to this standard.

We can offer you submersible motors with the following specification:-

Volts                                  3000VAC / 60hz / Three Phase

Poles                                  2

Speed                                3500 RPM

Depth     Rating                 3000 Mts nominal

Compensation                   Oil filled - external compensator (not included)

Housing                              316 SS

Mounting                           Horizontal (Details to be confirmed)

Shaft                                  See above  (Details to be confirmed)

KW                                    260kW @ 60 Hz

Insulation Rating               >16kV @ 140 deg C

Shaft Seals                         Bergman mechanical seals.  (Tandem seals available)

The final specification will need to be agreed upon placement of an order.  Insulation rating using Mylar windings.   

 ROV 14 260kW Pump Motor under construction

250kw/ 3300V / 50Hz / 4 Pole motors for Hydraulic Power Packs.

New submersible motors, for your hydraulic power pack project The requirement being for 250kw, double ended drive,

3300V / 50Hz, 4 pole, motors with subsea connector to be defined.

ROV20-4 motors, 250kw/4 pole/3300vac/3 phase/50hz, with stainless steel construction. Double Ended for fitment with hydraulic

pumps, with Subsea Connectors for Power and Sensors. In addition we can supply if requested cooler/heat exchangers

(at additional cost), for each of the motors purchased.

Our purpose built pump motors are designed specifically for use in the horizontal axis. Unlike a down-hole pump motor such as

the HT Sumo, our motors do not use pivot shoe thrust assemblies. As a result our motors are compensated for depth pressure

using oil rather than distilled water as in the case of down-hole pump motors. Our superior Mylar coated windings are the ultimate

winding coating technology.  Mylar coated windings have an insulation rating of >16kV at a temperature of 140 degrees C. No other

winding coating even comes close to this standard.

SME ROV20-4 submersible motor.

Volts                                  3300Vac / 50hz / Three Phase / 4 Pole.             

Speed                                1470 RPM @ 50 Hz

Depth     Rating                  3000m nominal

Housing                              316 SS

Mounting                            Horizontal

Shaft                                    See above 

KW                                      250kw @ 50 Hz

Insulation Rating                 >16kv @ 140 deg C

Shaft Seals                           Bergman mechanical seals.  (Tandem seals available)

Instrumentation                  Motor fitted 1 x RTD water detector, and temperature probe.

Connectors                         Power and Sensors (To be agreed).

Eff 92.4%

Power Factor .85

Weight 565kg

SME ROV10-2, 75HP, 2-Pole, 3000/3/60, SS316 construction.

Subsea Motor fitted with SMP 9WH-4 Stage NAB Construction

Pump to provide 4000L/M at 5Bar or 1060GPM at 170ft Head.  Motor is oil filled and externally compensated with oil.

Tube connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring.

SME ROV22-14, 120HP, 14-Pole, 3000/3/60, SS316 construction.

Subsea Motor fitted with Jetech 15055-UW-H Subsea

Quintuplex High Pressure Pump to provide 50L/M at 850Bar.  Motor is oil filled and externally compensated with oil.

Tube connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring. This

unit is operating at the lower end of its range and can have an increased output if necessary.

SME ROV22-12, 120HP, 12-Pole, 3000/3/60, SS316 construction.

Subsea Motor fitted with Jetech 100J3-UW-H Subsea Triplex

High Pressure Pump to provide 46L/M at 850Bar.  Motor is oil filled and externally compensated with oil. Tube

connection for Power and Subconn or equivalent connector for Water Detector and Temperature Monitoring.

SME 400kw 4-Pole 1500rpm 3300/3/50 Submersible Motor.

SME 400kw 4-Pole 1500rpm 6600/3/50 Submersible Motor.

SME 145kw 8-Pole 1500rpm 3300/3/50 Submersible Motor.

SME 145kw 8-Pole 1500rpm 6600/3/50 Submersible Motor.

SME ROV102, 40kw, 2-pole, 380/3/50(or 60hz), 40Kw submersible electric motor, oil filled, with SS316 Construction.

Speed 3000 rev/min. Starting Direct. Service continuous. Electric connection Seacon (connector fixed + flying to be

moulded to umbilical). Installation Horizontal.

SME ROV14-2 200HP 150kW 2-pole 3000/3/60.

Anodised Aluminium Construction Motor to suit operation with Water Jetting Pump. The exact Flange and Shaft

requirements to be advised by the client.

SME ROV14-4 200HP 4-Pole 3000/3/60 SS316 Construction Subsea Motor to fit Close Coupled Hydraulic Pump. 

Rexroth Hydraulic Pump A11VLO260DRS-11RNSD21-N00 with Variable Displace and Max flow of 260L/M at 180 Bar.

SME ROV14, 200kW, 268HP, 4-Pole, 3000/3/50, 1490rpm Stainless Steel Construction Subsea Motor.

Designed to close couple to Rexroth A11VLO190DRS-11-LN-12N00 Hydraulic Pump. The motor will cool itself in the

ambient seawater. Sensors and electrical connector.

SME 50 HP/ 3300V / 60Hz / 4 Pole HPU Motor. ROV and trencher HPU motors. 

RO144-150HP / 4 Pole / 3300VAC / 60Hz)

The motor in the photograph is a 150HP ROV HPU motor as delivered to Fugro Ltd for use on the FCV ROV. With

modifications to the pump mount and shaft and foot mounts arrangements, to suit the Linde HPR160 hydraulic pump unit.

This motor is available in either hard anodized marine grade Aluminium or in SS316 stainless steel construction.

150 HP HPU MOTOR.

Volts                                  3300VAC / 60hz / Three Phase 

Poles                                 4

Speed                                1750 RPM

Depth     Rating                 3000 Mts nominal

Housing                            Hard Anodized Aluminium (SS316 optional)

Length                               671 mm

Diameter                           350 mm

Height                               390 mm

Mounting                          Horizontal

Shaft                                  TBA

HP                                     150 HP @ 60 Hz

Insulation Rating               >16kV @ 140 deg

Shaft Seals                         Bergman mechanical seals. 

Cable Entry                       TBC

Sensors                              Water ingress x 2  /  Temperature x 2 – TBC

400kW/ 3300V / 60Hz / 4 Pole motors for Hydraulic Pumps.

These motors being used to power Sauer Series-90-L250 hydraulic pumps. The requirement being for 400kw, single

ended drive, 3300V / 60Hz, 4-pole, with subsea connector to be defined. The motors being required for an underwater

vehicle.

ROV20-4 motors, 400kw/4 pole/3300vac/3 phase/60hz, with stainless steel construction.

Single ended for fitment with Sauer hydraulic pumps Series-90-L250, with subsea connectors for power and sensors. Our

purpose built submersible pump motors are designed specifically for use in the horizontal axis. SME motors are

compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior

Mylar coated windings are the ultimate in winding coating technology.  Mylar coated windings have an insulation rating

of >16kV at a temperature of 140 degrees C.

SME ROV20-4 submersible motor specification

Volts                                  3300Vac / 60hz / Three Phase / 4 Pole.             

Speed                                1750 RPM

Depth     Rating                 3000m nominal

Housing                             316 SS

Mounting                          Horizontal

Shaft                                  Splined shaft as below

KW                                    400kw @ 60 Hz

Insulation Rating               >16kv @ 140 deg C

Water detector                  As per drawing

Connectors                        Power Oily tube connection. Sensors 

Shaft-spline                        Pitch diameter = 41.275 [1.625]

                                          Pressure angle = 30¢ª

                                          Number of teeth = 13

                                          Pitch = 8/16

                                          ANSI B92.1-1970, class 5, fillet root side fit

                                          Spline length 42.5mm

Full Factory Rewind and service of  260kw motors.

Our standard refurbishment programme includes the following:

• Strip down and through inspection of the complete motor.

• Cleaning and anti-corrosion treatment as required.

• Shaft seal replacement.

• Drive end-bearing replacement if required.

• Motor Insulation and Dynomometer testing.

• Motor rewind.

• Rebuild of the complete motor, test and despatch by sea to UK.

• Burton power connector to be disconnected.

• 53mm Burgman seal upgrade

• All ports will be opened from 3/8 to ½ BSP as requested.

• Spot facing as requested.

Any further work deemed necessary as a result of the factory inspection will be quoted separately, and a decision given

by the customer as to the course of action required on an item-to-item basis.

132Kw/ 1100v/2 pole/50hz/Foot Mount Motor.

A replacement 132kw Brook motor for use in a salt mine. We are pleased to be able to offer you our direct replacement

SME 132kW/2P/1100V/50Hz/RC315S/M Foot Mount Motor. This unit will be very similar to the Brooke mine motor

(Type: W-DF315SN. Serial number: B033586), and have the same voltage and feet spacing as the Brook motor.

Volts                                  1100VAC / 50hz / Three Phase 

Poles                                  2

Speed                                2975 RPM

Amps:                                 81A

Shaft                                  TBC

Please note this is a standard air-cooled motor with the terminal box on top. It has no mining approvals or flameproof

approvals. The Brook motor is fitted in a 315S-frame (508 and 406mm foot dimensions). The SME motor will be fitted in

a frame with the same foot dimensions.

SME ROV104-65HP-3000V- 50HZ submersible motor.

Deepwater subsea motors for your 4500m ROV system. The motors to be used in the HPU (Hydraulic Power Units) of a

0hp ROV at a depth of 4500m without a TMS. The pumps for the HPU, will be Rexroth axial piston pumps, 

type AA10VSO71DRG/31R-PPA12N00. These are pilot controlled constant pressure pumps, with a displacement of 71cc/r,

maximum output pressure 240bar, and shaft speed 1500rpm.

Our SME ROV104-65HP-3000V-50HZ Submersible Motor.

Construction  in aluminium alloy. This motor will be manufactured to your exact requirements. Sensors:  We have quoted a

Subsea Connector to allow Pin Outs for 1 x RTD for Temperature, and 1 x Water Detector.

Power:  We have quoted to supply 3m length of Oily Tube with Bulkhead Connectors to be mounted on the Main Junction

Box.

The final specification and manufacturing drawings to be agreed.   

6600V / 60Hz / 4 Pole motors / double end drive for Hydraulic Power Pack.

New submersible motors. These motors being used to power Sauer Danfoss Series-90-250 hydraulic pumps. The requirement

being for either 400kw or 500kw motors, double ended drive, 6600V, 60Hz, 4-pole, with subsea connector to be defined. Our

ROV20-4 type motors, 4-pole/6600vac/3 phase/60hz, with stainless steel construction. Double Ended for fitment with Sauer

hydraulic pumps Series-90, with Subsea Connectors for Power and Sensors. We can offer the ROV20 motor with shafts at both

ends, to mate with the Sauer Series 90 pumps that you intend using.

400kW/ 3300V / 60Hz / 4 Pole motors for Hydraulic Pumps.

New submersible motors. These motors being used to power Sauer Series-90-L250 hydraulic pumps. The requirement being for

400kw, single ended drive, 3300V / 60Hz, 4-pole, with subsea connector to be defined. The motors being required for an

underwater vehicle.

Our ROV20-4 motors, 400kw/4 pole/3300vac/3 phase/60hz, with stainless steel construction. Single ended for fitment with Sauer

hydraulic pumps Series-90-L250, with subsea connectors for power and sensors.

Our purpose built submersible pump motors are designed specifically for use in the horizontal axis. SME motors are

compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior

Mylar coated windings are the ultimate in winding coating technology.  Mylar coated windings have an insulation rating

of >16kV at a temperature of 140 degrees C.

SME ROV20-4 submersible motor specification

Volts                                  3300Vac / 60hz / Three Phase / 4 Pole.             

Speed                                1750 RPM

Depth     Rating                 3000m nominal

Housing                            316 SS

Mounting                          Horizontal

Shaft                                  Splined shaft as below

KW                                   400kw @ 60 Hz

Insulation Rating             >16kv @ 140 deg C

Water detector                 As per drawing attached.

Connectors                       Power Oily tube connection. Sensors.

Interface                           Single ended to suit a Sauer series 90 L250 Hydraulic pump, splined shaft option F1.

Shaft-spline                      Pitch diameter = 41.275 [1.625]

                                          Pressure angle = 30¢ª

                                          Number of teeth = 13

                                          Pitch = 8/16

                                          ANSI B92.1-1970, class 5, fillet root side fit

                                          Spline length 42.5mm

300kW/ 3300V / 60Hz / 4 Pole motors for Hydraulic Power Pack.

New submersible motors (with option for one additional motor to fulfil your spares commitment). These motors being

used to power Sauer Series-90 hydraulic pumps. The requirement being for 300kW, double ended drive, 3300V / 60Hz,

4 pole, with subsea connector to be defined.

ROV20-4 motors, 300kw/4 pole/3300vac/3 phase/60hz, with stainless steel construction.

Double Ended for fitment with Sauer hydraulic pumps Series-90, with Subsea Connectors for Power and Sensors. We can

offer the ROV20 motor (as per the attached drawing) with shafts at both ends, to mate with the Sauer Series 90 pumps that

you intend using. Our purpose built pump motors are designed specifically for use in the horizontal axis. Unlike a down-hole

pump motor such as the HT Sumo, our motors do not use pivot shoe thrust assemblies. As a result our motors are

compensated for depth pressure using oil rather than distilled water as in the case of down-hole pump motors. Our superior

Mylar coated windings are the ultimate in winding coating technology.  Mylar coated windings have an insulation rating

of >16kV at a temperature of 140 degrees C. No other winding coating even comes close to this standard.

100 HP ROV Submersible Motor – Immediately Available.

Silvercrest-SME has placed a 100Hp submersible Rov motor (as illustrated below) on standby. For emergency

availability to all Rov operators.

The motor has the following specification and is a direct drop in replacement for the Curvetech 100HP unit. The motor

is presently set up to receive a Rexroth A10VSO140 pump, but can be modified to accept other pump models if required.

The motor is brand new, direct from our factory and has been constructed specifically for this purpose.

ROV124-100HP, 4-pole, 3000v, 60Hz. 

Mil Spec hard-anodised T6 hardened 6061 grade Aluminium construction, with all 316 hardware.  Rotor dynamically

balanced.  Oil filled externally compensated.  Fully performance tested on Dynamometer at rated voltage and frequency. 

bsea connectors for power and instrumentation.  Designed for maximum electrical efficiencies to reduce full load currents. 

Motor designed for low operating temperatures to extend reliable lifespan.  Specialised winding insulation system to ensure

ng operating life even under the most arduous of  duties.  On Deck operation generally allowable.

Power                                             100 HP

Volts                                               3000V

Frequency                                       60 Hz

Poles                                               4

RPM                                               1770 RPM

Shaft                                               Woodruff keyed (see attached drawing for detail)

Construction                                   Hard Anodized Aluminium 6061-T6

Compensation                                 Oil filled – external-not supplied

Power Connector                            Burton 5757-1236-002
Sensor Connector                           SubConn BH-4-M

SILVERCREST/SME.

SME is a 100% owned and operated Australian company. Where the core business is to manufacture, supply and service

submersible electric motors. Thirty service orientated staff members have the ability to service and technically support

all makes and models of submersible electric motors at their Perth facility. The sales department, with a total of 75 years

experience in the submersible and electric motor business, are happy to assist with any enquiries on the purchase of

submersible motor engineering products ranging from 3.7kw to 1500kw, in various voltages and frequencies.

In the 1200 ft workshop facility, purpose built for the manufacture and service of submersible electric motors, SME

offers the following in house services:

• New Submersible Motors (6” to 20”, 5HP to 550HP, 2-pole and 4-pole).

• All Voltages and Frequencies.

• Full Machine Shop capacity.

• Voltage Testing through 10,000 volts.

• ISO9001 quality assured workshop.

• An Overhead crane (10ton swl).

• Water Pressure Test facility with full international certification.

• Full Load / Dyno testing to 250kw – with detailed test

• Balancing facility available to 250 kg.

• High POT and Surge Testing.

SME are a fully integrated manufacturing facility. In addition to a standard range of motor products we also produce the

following:

• Special Motors for specialist applications.

• 4-Pole, 6-Pole and 8-Pole motors.

• All Stainless Steel or more exotic material construction.

• Special Thrust ratings.

• Special Lead manufacturing.

• NEMA and other couplings in a variety of materials.

• Replacement parts of obsolete products.

• Trouble Shooting.

• Technical assistance during Commissioning.

• Repairs to all motor makes (oil and water filled).

• Rewinds of all voltages (200 volt to 6.6kv) with 1 Year Warranty.

• Dynamic testing.

• Non-Destructive testing.

• Welding and Machining.

• On site or Factory Based cable splicing.

• Retro fitting of Condition Monitoring Equipment.

• Modification of existing motors for upgrade to higher specifications.

• Refurbishment of ROV motors using more technically advanced materials.

SUBSEA and SUBMERSIBLE THRUSTER SYSTEMS.

Silvercrest in conjunction with SME are able to offer a complete range of submersible motor systems to meet the

demanding requirements of the Rov, sub-sea trenching, and manned submarine industries. Manufactured to exacting

standards, our motors are more competitively priced than any comparable motors on the market today.

ROV MOTORS  / TRENCHING REPLACEMENT MOTORS.

We offer a standard range of direct replacement motors, designed as a direct replacement to fit into many of the more

popular ROVs and trenching systems in use today (for example, the Perry, Hydrovision and Slingsby underwater systems).

Silvercrest can offer bespoke manufacturing of motors to meet your specific requirements. We recently completed the

design of a 290HP / 300VAC trenching motor for use in subsea trenching operations. Also available upon request are

matched High Voltage Transformer Units (HVTUs) and electronic soft starts for each standard replacement motor.

HVTUs are custom built to your specification.

High Voltage Transformer Unit.

Our standard ROV / Trenching Replacement Motor Range include:

• 75HP Sunn Star replacement.

• 100HP Sunn Star replacement.

• 125HP Sunn Star replacement.

• 75HP Fowler replacement.

• 100HP Fowler replacement.

• 100HP Curvetech replacement.

100HP Curvetech replacement motor.

MANNED WET and DRY SUBMARINE PROPULSION SYSTEMS.

Historically, over the last fifteen years electrical submarine thruster systems have been problematic. Notably AC motor

controllers and DC brush motor powered thrusters have been the cause of many a company’s downfall. Other problems

such as 120VDC battery buss voltages have compounded the overall problem.

Since the early tourist submarines first came into use during the mid 80’s, motor controller technology has steadily

developed. Certain manufacturers have produced systems which have proven to be more capable and more importantly,

reliable than their early counterparts. Unfortunately, this leaves quite a few of the older tourist and research

submersibles struggling with the older unreliable systems that are still in use.

A little known fact is that motor drive systems have a finite operating life, indeed they have a ‘shelf life’. This is due to

the deterioration of the large capacitors used in the drive controllers. This occurs even when the drive is not in use. If a

drive is more than five years old, then it’s capacitors are already approaching the end of their useful life. As a result these

drives are now becoming tired and often prone to failure. Usually with accompanying pyrotechnics.

Silvercrest has developed a new ‘replacement’ propulsion system for both new build and existing manned submarines. We

tailor the installation to solve your propulsion requirements. Plus we will visit you on-site to assess your installation and

determine the best route forward to solve your problems.

Once the problems have been identified and assessed, where needed, we will re-design your battery buss arrangement to

produce a working voltage suitable to run a reliable and powerful thruster system. We will then design the motors

specifically to meet your requirements. The pressure compensation system is added and the final stage of the design

process is matching the correct drive with your new motors.

Recently Silvercrest completed the installation of our 69kW (6 x 11.5kW) AC propulsion and ballast system into one of the

Odyssey class tourist submarines in Southeast Asia. The system utilizes a state of the art, purpose built, 11.5kW thruster /

ballast pump motor. A custom built submersible, 3 phase, AC, squirrel cage induction motor encased in a 316 Stainless Steel

compensated housing. The motor was designed specifically to match the available buss voltage and it’s dedicated motor

invertor controller. The Silvercrest motor is smooth, quiet and powerful.

Motor control is supplied through a CT Commander SE invertor controller drive. Manufactured by one of the leading

drive manufacturers in the world today. Each drive utilizes digital control using an onboard processor with EEPROM

data storage. This allows the drive to store operating parameters and it’s own operating history for maintenance and

fault diagnosis purposes.

A twin Burgmann tandem mechanical shaft seal arrangement, fitted on each motor shaft, provides protection from water

ingress. This works in conjunction with a custom built 33 Lt capacity oil-filled central motor compensation system.

Great attention has been applied to designing our motor systems for reliability and a long working life. All components

are rated to at least 150% of required working capacity. This over rating of individual components ensures that no

single part of the system can ever be overloaded during correct use.

Specific motor functions and operational profiles can be catered for and programmed into the CT controller. For example

the Odyssey system has a ‘Turbo’ function, whereby the motors run normally with a 7.5kW max output. At the flick of a

switch on the pilot’s console, the motor can be enabled to output it’s maximum 11.5kW (for 1½ minutes) for use in

maneuvering emergencies.

Motors and drives of various ratings are available from Silvercrest, utilizing many of the same frame parts. For example our

15kW motor utilizes the exact same parts as the 11.5kW unit, but with more motor laminations and therefore a slightly longer

body. This reduces your spares requirement even when mixing and matching the motor sizes. Military spec versions of the

motors are also available on request.

New lateral thruster (Tourist submarine refit).

Silvercrest offer a return to dealer, two-year warranty on all parts, subject to correct usage and subject to our standard

terms & conditions.

Silvercrest 11.5kW / 240VAC Thruster Units for Large Tourist Submarine.

Depth Rating 3000 Mts
Power Rating: 3kW -20kW
Poles 2,4,6 or 8
Voltage (Nominal) 340-480VAC
Phase 3
Max Amps 1A @ 0.25kW @ 340VAC
130A @ 20kW @ 340VAC
30.6A @ 11.5kW @ 340VAC *
Max RPM 2600 / 2 pole @ 50Hz
1300 / 4 pole @ 50 Hz
970 / 6 pole @ 50 Hz **
650 / 8 pole @ 50 Hz
Housing 316 Stainless Steel
Compensation Oil Filled – external compensator, ambient or over pressure.
Seals Twin, Tandem Mechanical Shaft Seals.
Weight 160kgs (11.5 kW) ***
Fixtures To Order

Drives:

Type
Rating 0.25kW – 37kW
Voltage 470-600VDC in
340-480VAC out
Current Up to 130A continuous
Protection Over current, Undervolts, Thermal
Cooling Forced Air-conditioned air (watercooled optional)
Weight 11kgs
Warranty 2 Years

Compensator:

Type Expanded bellows
Rating 33Lts ambient to 100PSI max
Material Anodised Aluminium or 316 Stainless Steel.
Ports 7 – Optional extras as required
Fill # 4 JIC thru ¼” turn valve
Bleed ¼” Taymar 20PSI relief valve
Fixtures 316 Stainless Steel

* Actual dynamometer measured
** Actual dynamometer measured
*** Actual measurement

Motor controllers for a manned submarine.

SUBSEA TIDAL GENERATORS. Subsea Electric Generators.

Subsea Generators can be air filled for optimum efficiency and are suitable for depths down to 30 metres.

Induction Generators can be supplied for 2P, 4P, 6P, 8P, and 10P operation usually close coupled to a gear box. (The efficiency and PF are poor for Induction Generators with more than 10 Poles).

Permanent Magnet Synchronous Generators can be supplied with very low speeds and 40 poles or 60 poles for nominal 20 RPM operation, which negates the need for a gearbox. These generators can have high efficiency up to 95% and they have unity Power Factor. Because of the number of poles these generators tend to be quite large in Diameter - typically more than 1 metre.

If Subsea Generators are to be used at depths below 30 metres it is recommended that they are oil filled and compensated - but the mechanical losses will be about 3% due to the extra friction from the oil.

500KW (670Hp), 1000V, SUBMERSIBLE MOTOR with HEAT EXCHANGER.

WD Sump Pump / Slurry Pump Submersible Motors.

SME "Wet and Dry" motors are designed for use with "sump pumps" for

continuous submergence to a depth of 10 meters in water, slurries, sludge,

effluent, sewerage, and other liquids. These motors can offer a robust alternative

to other units that suffer from shorter operating lives with no changes to the

existing wet end performance.

The motor winding compartment is air "filled", with an oil chamber for the

mechanical seal/oil seal chamber. These IP68 motors are designed for vertical

shaft down operation driving pumps. SME can provide this range of motors with a

variety of flange and shaft options. These motors can be provided with mounting

facilities to suit the bulk of OEM products available today and also with the option

of standard IEC or NEMA shaft and flange dimensions. SME can offer different

mechanical seal/oil seal, and thrust bearing arrangements to suit different

customer preferences and requirements.

SME motors are generously rated by design so they can tolerate overloads, lack of cooling, and

general abuse. They can run under full load for 15 minutes not submerged with no external

cooling - hence the name "Wet AND Dry". The motors are fitted with moisture detectors and

thermal protection. Provided these are properly connected and set up to give advance warning

of problems, these motors should give many years of reliable service, provided regular

maintenance is undertaken by suitably qualified service technicians.