Ebara Cryogenic Pump
Spare Parts Supplier
Parts for Ebara Cryodynamics submerged-motor pumps in the cargo and fuel tanks of gas carriers — cargo, spray and stripping, fuel gas and emergency units — matched to the model designation and serial number before anything is quoted.
Ebara Cryodynamics pumps found on gas carriers and LNG-fuelled ships
Ebara's cryogenic pumps reach ships through the Cryodynamics product line. Curve sheets can carry the name Ebara International Corp., Cryodynamics Division; the 2019 marine brochure is issued by Elliott Group, a wholly owned subsidiary of Ebara Corporation, and the maker's current site uses the name Ebara Elliott Energy. The maker lists shipboard units for main cargo unloading, spray and stripping, fuel gas supply and emergency duty, together with pumps for FSRU regasification and LNG bunkering vessels. Every one of them runs with its motor submerged in the liquid it pumps, so a parts request reads more like a motor overhaul than a seal-and-impeller job.
12EC-24 · 16EC-24 · 16EC-24H
Main cargo unloading pumps fixed in the cargo tank and bracketed to the pump tower; the maker notes that a tank on a liquefied gas carrier typically has two of them. 16EC-24H is listed as a high-flow cargo pump alongside 16EC-24, so a request that drops the final letter describes a different pump.
2EC-12
A fixed in-tank pump that sprays LNG onto the inside top of the cargo tank to keep it cold and reduce boil-off, and takes the tank down to its minimum liquid level; the maker adds that spray pumps are often used for product recirculation. Its very low suction-head requirement rests on the inducer, so inducer condition is worth describing whenever one of these pumps is opened.
1EC-063 · 1.25EC-082 · 1.25EC-083 · 1.5EC-092
Low-flow, high-head pumps that feed LNG to the engines. The maker says it developed the first dedicated LNG fuel gas pump for LNG carriers more than three decades ago, and it now offers fuel gas pumps for fuel gas supply systems and LNG fuel tanks on LNG-fuelled ships. 1.25EC-082 and 1.25EC-083 share a size figure but are listed as two-stage and three-stage versions, so the last digits are not optional.
8ECR-12
A retractable back-up pump, lowered down a column and seated on the foot valve to empty a tank if both of its cargo pumps fail. The maker lists its accessories as a set of their own: foot valve, cable support system, headplate, deck junction boxes and storage containers.
8EC-12
Smaller-capacity cargo pumps for LNG bunkering vessels and barges, fixed in membrane or C-type tanks. The maker's bunkering sample curve is drawn for an 8EC-12 run from a low-voltage AC drive, which lets the speed be reduced to take the tank down to a low level. The drive is paired with the motor to give the pump curve, so the drive model belongs on the request as well.
1.25ECC-085
An ECC pump sits inside its own suction vessel, built to the applicable pressure vessel code, which serves as the outer pump casing. The maker uses this arrangement for high-pressure send-out on FSRUs, and its brochure shows the variable-speed CRYO-Fuel fuel gas pump as 1.25ECC-085. On floating units vessel-mounted pumps get additional lateral supports; those belong to the installation rather than to the pump.
What wears inside a pump that lives in its own cargo
In the Cryodynamics design the induction motor and the pump sit on one shaft inside the liquid, with no rotating seal. The pumped liquid cools the motor and lubricates the bearings, and the maker's patented Thrust Equalizing Mechanism (TEM) balances axial load hydraulically so that the bearings carry no steady thrust. That removes the familiar pump failures — seal leaks, coupling wear, oil contamination — and leaves a short, specific list of things that do wear.
Lubricated by the cargo, not by oil
The pumped liquid is the only lubricant and coolant the bearings have, and there is no oil system to sample. Running hours and the recent duty of the pump, including stripping runs at low tank level, are therefore the main evidence to send with a bearing request.
TEM wear rings and stationary plate
Part of the flow passes the back wear ring of the highest-pressure impeller into the TEM, and the gap between a stationary plate and the impeller's throttling ring adjusts until the forces balance. Because this is what keeps axial load off the bearings, a bearing request is best read together with the TEM ring and plate condition recorded at the last overhaul.
The stage that sees the lowest suction head
A high-solidity helical inducer forms the first hydraulic stage and lets these pumps run at very low suction head without cavitating. The maker offers built-in internal filtration for cargo prone to particulate contamination, such as LPG, so whether a filter is fitted belongs with any inducer or impeller request.
Stator, rotor bars and insulation
The maker's repair process includes electrical tests on the stator and motor armature, cryogenic checks on the shaft assembly and a growler test for discontinuity in the motor bars, and repaired units are purged with nitrogen so that moisture stays out in transit. Insulation readings taken on board, and how a removed pump was stored, belong in the evidence.
Foot valve seal, springs and cables
On an ECR pump the foot valve at the bottom of the column is closed by coil springs and by the head of liquid in the tank, and sealed by a dual pressure-sensitive seal, so the column can be inerted with nitrogen and the pump lifted out with liquid still in the tank. The valve seal, its springs, the lifting cables and the cable support system are what that lift depends on.
Ebara Cryodynamics components that appear on RFQ lines
The groups follow the pump from the inlet upwards: inducer and hydraulics, thrust balance, motor, then the cable, valve and monitoring hardware that ties the pump to the tank top. Put the drawing or parts-list item number beside each line where the pump manual gives one.
- Pump-motor shaft bearings
- Impeller wear rings and TEM wear rings
- TEM impellers, throttling rings and stationary plates
- Helical inducers, impellers and axial diffusers
- Shaft assemblies
- Submerged motor stators and rotors
- Power feed cables, armoured retraction cables and deck junction boxes
- Foot valve seals and coil springs
- Lifting cables, cable support systems and head plates
- Built-in internal filters, where fitted
- Vibration monitoring accelerometers, cabling, feedthroughs and junction boxes
Identifying an Ebara cryogenic pump before a part is quoted
The pump sits inside a tank and cannot be inspected in service, so identification relies on the documents held on board: the pump data or characteristic curve sheet and the last overhaul report. The maker's own parts service asks for the equipment serial number first; the items below add what a serial number alone does not tell a third party.
- Full model designation as written in the pump documents, for example 12EC-24 or 8ECR-12, including any trailing letter
- Equipment serial number of each pump
- Project number and item number from the pump characteristic curve sheet
- The Hydro Basis code, where the curve sheet shows one
- Duty on board: cargo, spray and stripping, fuel gas, emergency or regasification feed
- Installation: fixed in the tank, retractable in a column, or in a suction vessel
- Cargo the pump was specified for: LNG, LPG, ethylene, ammonia or a multi-cargo specification
- Motor electrical data from the curve sheet or motor documents, and the drive model if the pump runs at variable speed
- Issuer name on the documents: Ebara International Corp. Cryodynamics Division, Elliott Group or Ebara Elliott Energy
- Last overhaul report with recorded clearances, plus insulation and vibration readings since
How an Ebara cryogenic pump request is routed
A pump that runs inside LNG is repaired as a matched assembly: the maker's service centre balances the shaft rotor and impellers, records final clearances and, by its own statement, uses only genuine Elliott parts. That shapes what an independent supplier can sensibly offer, and the request is read with that in mind from the first line.
Serial number before part number
The maker's own parts service starts from the equipment serial number. The serial number and the curve-sheet data are matched before any item is described as suitable, and a request without them is queried back first.
Supply route written beside each line
Parts inside the tank run in cryogenic liquid with no external lubrication. The route is written beside each quoted line, and an OEM-route review can be asked for line by line; the OEM or verified alternative comparison sets out what evidence each needs.
Workshop scope stated openly
Rotor and impeller balancing, electrical testing of the motor and the recording of final clearances belong to a pump workshop, not to a parts order. Where a line on the request is really a workshop job, that is said at the quotation stage instead of being priced as a part.
Deck-side items as separate lines
Deck junction boxes, power feed hardware and vibration monitoring items sit outside the tank and are listed apart from the pump itself, so they can be checked against the ship's electrical documents without waiting for a pump to be lifted.
Class and cargo documents respected
The maker builds power feed cables and deck assemblies to the requirements of the major classification societies, and the cargoes a pump may handle are part of its original specification. Any departure from the installed specification is raised with the superintendent before it is quoted, never assumed.
Ebara cryogenic pump enquiries — what superintendents ask
Which Ebara pumps are found on liquefied gas carriers?
Ebara's Cryodynamics line covers submerged-motor pumps fitted inside the cargo tanks: main cargo pumps such as 12EC-24 and 16EC-24, spray and stripping pumps such as 2EC-12, fuel gas pumps such as 1.25EC-083, and the retractable 8ECR-12 emergency cargo pump. The same line includes smaller cargo pumps for LNG bunkering vessels and ECC pumps for high-pressure send-out on FSRUs.
What do EC, ECR and ECC mean in an Ebara pump designation?
In the maker's literature they go with the installation. EC pumps are fixed in the tank and bracketed to the pump tower, ECR pumps are retractable and lowered down a column onto a foot valve, and ECC pumps are mounted inside their own suction vessel, which serves as the outer casing. The figures matter as much: the maker lists 16EC-24 and 16EC-24H as different cargo pumps, and 1.25EC-082 and 1.25EC-083 as two-stage and three-stage versions.
Why does an Ebara cryogenic pump have no shaft seal?
The induction motor and the pump share one shaft and both sit in the oxygen-free liquid being pumped, so no shaft passes out of the liquid and there is nothing to seal. The pumped liquid cools the motor and lubricates the bearings. That is why bearings, wear rings and motor condition, rather than seal faces, dominate the parts list.
What is the TEM and why does it matter when ordering parts?
TEM is the maker's patented Thrust Equalizing Mechanism. Flow past the back wear ring of the highest-pressure impeller and the gap between a stationary plate and the impeller's throttling ring set a pressure balance that keeps axial load off the bearings. Because the bearings depend on that balance, the TEM rings and plate are best checked and quoted together with any bearing request.
Can Ebara pump parts be identified without lifting the pump?
Often a first identification is possible from records: the model designation, the serial number, the project and item numbers on the curve sheet and the last overhaul report. Parts that depend on measured clearances can only be confirmed once the pump is opened, so those lines are quoted as provisional until the measurements are in.
Is Vessel Core connected to Ebara?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Ebara, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Send the designation, serial number and the last overhaul report.
List each pump by duty and tank, with its model designation, serial number and curve-sheet item number, the parts required and the port. Lines for parts inside the tank and for deck-side items are quoted separately, so the ship can see which items wait for the pump to come out.
