Bornemann Twin-Screw Pump
Spare Parts Supplier
Twin-screw pumps from Bornemann of Obernkirchen, Germany, now part of ITT, read from the full type code and serial number on the plate, so screws, seals, gears and bearings are quoted for the pump that is actually on the skid.
Bornemann pumps that reach a parts request
Joh. Heinr. Bornemann GmbH of Obernkirchen, Germany, dates from 1853. In 2012 ITT agreed to buy it, naming its twin-screw technology and multiphase experience as the reason. Its own list of twin-screw series includes W/V and HC, and both turn up by their full codes in independent listings of used pumps. Bornemann names marine among the fields its pumps serve, and marine suppliers list its parts; the site's lube oil guide lists Bornemann next to Kral and Leistritz among lube oil circulation pumps. Any other Bornemann type is read from its plate as it comes.
W/V
Bornemann lists W/V among its twin-screw series. Used-pump listings give codes that start with W, then a size number and further letters and digits, and show such pumps ashore on fuel oil and heavy oil. Every character of the code is copied, because the letters after the size belong to the pump, and screws and seals follow the code and the serial together.
HC
A second Bornemann twin-screw series, written HC with two groups of digits after the letters in the full code. An HC pump is never quoted from a W/V parts list of a similar size: its screws, seals and bearings come from its own code and serial.
Multiphase boosting systems
Bornemann's main oil and gas business is multiphase pumping: twin-screw pump systems for oil and gas production. Such a unit is read like any other Bornemann pump, by type code and serial, with the package plate where the pump sits on a skid.
SLH
Bornemann also builds the SLH hygienic twin-screw pumps for food and pharmaceutical plants. They are a separate series from the oil-service pumps above, and their parts are not taken from a W/V or HC list.
Bornemann · ITT Bornemann
The company traded as Joh. Heinr. Bornemann GmbH before ITT agreed to buy it in 2012, and today appears as ITT Bornemann GmbH. Either name on a plate or in a manual means the same maker.
KRAL W · Leistritz L
KRAL also has a W series of screw pumps, so the letter W alone does not say whose pump it is: the maker name on the plate decides. A KRAL pump is read on the KRAL page and a Leistritz L-range pump on the Leistritz page.
What puts a Bornemann pump on a parts list
Screw pump complaints fall into a few kinds, and each one points at a different part of the pump.
Delivery falling off
When a screw pump delivers less at the same speed, the clearances between the screws and the bore have often opened up, through wear or dirt in the medium. Say what the pump moves and when its suction strainer was last cleaned, so screws and liner or casing are judged together.
Leak at the shaft
Oil or fuel at the shaft points to the mechanical seal or the packing. The seal is a line of its own, read from its own code or measured, and a seal leak alone does not call for new screws.
Noise from the drive end
On a twin-screw pump with timing gears, the gears keep the screws from touching, so a new knock or rising noise points at the gears and bearings. Note whether the bearing oil looked dark or carried metal, and send the bearing markings.
Run dry or on the wrong liquid
A screw pump relies on the liquid it moves to keep its screws from rubbing. A pump that has run dry, or on a thinner liquid than it was built for, can score its screws; say what happened before the noise or the loss of flow began.
Bornemann pump items on RFQ lines
Listed by part of the pump: screws, sealing, the gear end and the casing are separate lines, and each one names the pump code and serial it belongs to.
- Screw sets: driving and driven screw, matched to the pump type and serial
- Liners and casing inserts, where the pump is built with them
- Mechanical seals, single or double, with their seats and springs
- Stuffing box packing where the pump has no mechanical seal
- Timing gears, matched as a pair to the screw set
- Rolling bearings at the drive and gear ends, with bearing cover seals
- Casing joints and O-rings for covers and seal housings
- Couplings and coupling elements between pump and motor
Reading a Bornemann pump before a line is quoted
A screw pump is quoted from its plate. These details make the request quotable without anyone guessing at screws:
- Complete type code as stamped, with every letter and digit after the series letters, such as W or HC
- Serial number from the plate; screws, gears and seals are matched to it
- Maker name on the plate: Bornemann, ITT Bornemann or another maker
- Medium and duty: lube oil, fuel or heavy oil, or another liquid, with its viscosity grade; the oil viscosity grade converter sets ISO VG and SAE side by side
- Shaft sealing seen on the pump, with the seal's own code or measured sizes; the mechanical seal size finder reads EN 12756 sizes
- Bearing markings, read with the bearing designation reader
- Driver: electric motor with its own plate, or another drive
- Photographs of the plate square-on and of the pump in place, showing ports and seal housing
How a Bornemann pump request is worked
Every line is handled as a genuine part or a checked alternative, confirmed before the quote. For a screw pump the review starts at the plate, because screws, gears and seals are matched by pump type and serial, not by the duty the pump does.
Code and serial, both
The type code names the series and size; the serial ties screws, liner and gears to the pump that was built. A line is opened with both, and a code without its suffix goes back to the ship with a question.
Screws as a set
Driving and driven screws are made to run together, so they are quoted as the pump's set. A single screw is offered only where the maker's data allow it, and the line says so.
The seal by its own code
A mechanical seal is quoted from its own code or measurements, which the seal material code page helps to read. Face materials are copied, not changed, unless the owner asks for a checked alternative.
Duty does not name the pump
The lube oil guide lists Bornemann, Leistritz and KRAL among lube oil circulation pumps, so the duty alone does not say whose pump it is. The plate decides which maker and which parts list apply, never the system the pump serves.
Bornemann twin-screw pump parts — questions from the ship
Is ITT Bornemann the same maker as Bornemann?
Yes. ITT agreed to buy Joh. Heinr. Bornemann GmbH of Obernkirchen in 2012, and the company now trades as ITT Bornemann. Either name on the plate or in the manual means the same maker; send it as it reads.
Can screws be quoted from the W code alone?
No. The code gives the series and size; the serial number decides which screws, liner and gears belong to that pump. Send both, with the medium the pump moves.
Can the mechanical seal be ordered on its own?
Yes. Send the seal's own code or its measured sizes with the pump code and serial; the mechanical seal size finder covers EN 12756 sizes. The seal is renewed with the same face materials unless a checked alternative is agreed.
Are Bornemann multiphase pumps handled too?
Yes, on the same evidence: the pump type code and serial, the package plate where the pump sits on a skid, and the medium. A multiphase unit is read on its own data and is not matched to a twin-screw oil pump of similar size.
Our lube oil pump has no readable plate. What then?
Send photographs of the pump from all sides, any cast marks on the casing, the motor plate and the system it serves. The maker is confirmed first; until then nothing is quoted against the Bornemann name.
Is Vessel Core connected to Bornemann?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Bornemann, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Start with the plate on the pump.
Send the full type code and serial number, the medium and its viscosity grade, the shaft seal you can see and a photograph of the plate. Every line is tied to its own pump before a part number goes against it.
