Model BB2 -Dry Mounted Electric Motor Pump

• Full string test capability
• Full string test capability
• Self-contained system customised to meet client specifications and designed to latest Class regulations, IMO, SOLAS , NFPA 20 and requirements to emission
• Skid mounted or containerized in A60/H60 enclosure for safe or hazardous design
• Specially designed control solution ensures minimized sizing of the Generator and Diesel Engine
• Start up with water filled risers for avoiding water hammer
• Water on deck in less than 15 sec
• Designed combined solution between FW duty and Essential duty
• Full API 610 design
• Vertical arrangement
• Side-side and In-line nozzle arrangements
• Robust design
• Low noise solution available
• 4 times API 610 nozzle forces
• Maintenance free sleeve bearing in NDE

The pump is normally an Eureka BB2 pump in accordance with API610 latest edition. The generator set comprises of a diesel engine mounted on vibration dampers and an alternator mounted on a common baseframe together with auxiliaries.

Cooling water for diesel engine and generator is provided from the fire water pump, fed to the genset through a Sea Water Harness loop to ensure correct pressure and flow. The seawater harness is fitted with t-strainers to protect the plate heat exchangers from water-transported contaminations.

Heat exchangers for jacket water, turbo after cooler and fuel return are installed on skid.

A Jacket Water heater and circulation pump will keep the diesel engine warm during stand still in order to give an easy start up. Further, an electric lubrication pump will operate prior to test start of the diesel engine and after all normal stop of the same in order to reduce wear and tear for the engine.

The engine start system can be either electric (24VDC), pneumatic or hydraulic and shall have a primary and backup function. The most common solution is a dual electric start system with either pneumatic or hydraulic backup.

A fuel tank will enable the genset to operate for 18/24 hr. A local control panel (LCP) will monitor and control the whole system. The LCP is complete with necessary instrumentation and control system either as an independent package or fully integrated into the SAS system. An easy-to-use touch panel is mounted in front of the LCP for local operation and monitoring.

The system can operate either in test mode or in fire mode. In test mode a number of alarms will cause the engine to stop. In fire mode only engine over speed and short circuit in generator output will cause shutdown.

The generator is water cooled, also fed from the fire water pump. An electric circulation pump will circulate the water through the generator heat exchanger in order to maintain the operating temperature within limits.

The diesel electric fire water pump system gives a flexible installation as the genset can be installed remote from the pump thus located in safe area while the motor/pump can be located in hazardous area if required. The system is designed to comply to latest edition of NFPA20 with easy access to all maintenance areas. All units will be full load tested prior to delivery at Eureka’s state of the art test center.

Diesel Engine
Diesel engines used in Eureka fire water systems are designed to operate in an offshore/marine environment. The diesel engine is skid mounted, coupled with the driven unit. For each project diesel engines are selected to meet the specified power requirements of the driven unit.

Generator
The generators used are 3-phase asynchronous type, designed for use in offshore/marine environment, in compliance with IEC60034. We deliver generators in a wide range of power outputs, decided individually per project to suit the driver and application. The generator is dependent on external cooling. This is most commonly achieved by use of seawater, either directly to a titanium cooler in the generator, or indirectly through a plate heat exchanger with a closed loop water/glycol system.

Control Panel
Control panels for the fire water package contain all components and functions necessary for self contained operation, monitoring and protection of the system. The main components typically included in the cabinet are batteries used to power the control panel in case of loss of power from the installation, battery chargers, generator[/one_half]

protection equipment, a touch panel in the door to operate and monitor the system locally, and a PLC. The make of PLC can be altered from the Eureka standard to adapt to the SAS system of the installation. Cabinets are IP55 as standard.

Transformer
To ensure the system is self-contained, transformers are in some cases required. This could be necessary to run auxiliary equipment such as coolant circulation pumps, radiators etc. needed to maintain safe operation of the equipment. Primary power will be derived from the generator set, secondary voltage is normally 690V. For every project the transformers are calculated and sized to minimize dimensions and weight, based on the required power by auxiliaries. Material, painting and enclosure will be designed to satisfy customer requirements.

Diesel Tank
Diesel day tanks are specially designed for each project, and can even be tailored for each single diesel engine system if this is required by space limitations, room or container configurations etc.

Room Cooler
To remove excess heat from the container/room, room cooler can be supplied by Eureka. For the self contained systems room coolers must be included. Room coolers typically consist of seawater cooled circuit, and electrically driven fans for air flow through the cooler. Hydraulically driven fans may be supplied as an option.

Exhaust Cooling
Where there is a requirement to maximum temperature of the exhaust gas, Eureka may supply exhaust coolers. The temperature of the exhaust gas from the diesel engine is normally 400-450degC, and the exhaust cooler typically decreases the temperature to below 200degC. The cooling circuit is normally closed loop water/glycol with an electrically driven circulation pump powered by the generator.

The exhaust cooler is Eureka’s own design and meet the offshore requirements with regards to welding, material, surface treatment and documentation. The exhaust cooler is equipped with separate connection points for differential pressure and temperature transmitters, and instruments may be ordered as an option.

Introduction

The EUREKA BB2 pump is a single stage, double suction, vertical in-line or side-side configuration in compliance with the latest edition of API 610 and are well suited for layout restricted areas. It is designed for continuous duty and is particularly suitable for offshore applications, pumping fluids over a wide range of temperatures and pressures. The rotor, motor and cover can be removed from the pump casing as a complete unit without disturbing the piping. In general the pump materials comply with the grades listed in API610 and NORSOK M630/M650. The standard materials are 25% Cr super duplex (API610 D2) for seawater applications.

Construction

Case and cover
The pump is radial split with the casing and nozzles integrally casted. The cover contains the seal chamber and is designed to carry the motor.

Shaft and Mechanical seals
The pump impeller is axially fitted to an extension of the motor shaft and it is designed to use a single mechanical seal according API682.

Flanges
Suction and discharge nozzles are furnished with 300 lbs Ansi B16.5 RF flanges as standard.

Hydraulic range
Capacity: 700-3000 m3/h
Differential pressure: 2 – 40 bar
Design pressure: 40 bar
Temperature: -46°c – 250°c

Impeller and wear rings
The impeller is double suction and axially balanced. It is designed with a large eye area to ensure low NPSH requirements, and thus reduce the possibility of cavitations. The impeller wear rings are mounted on the impeller with a slight shrink fit and pinned in position. The case wear ring and cover wear ring are inserted in the case and cover with a slight interference fit and secured with a hollow head set screw.

Bearings
The pump only includes a radial bearing on the pump NDE. This is seawater lubricated sleeve bearing.
There is no thrust bearing in the pump. The thrust bearing in the motor is carrying the pump rotor.

Electric motor
Eureka BB2 pumps are for this application delivered with a water-cooled electric motor taking water directly from the pump for cooling.