Spare part
Replacement components for the local control panel that supplies and protects the power unit of an electrostatic coalescer, desalter, dehydrator or prewash coalescer: the voltage controller and its setpoint control, the voltage and current indicating instruments, contactors, relays, fuses, indicator lamps, selector switches, terminal blocks and the panel door seals. The panel keeps the field energised, lets the operator set the electrode voltage and trips the supply on a fault.
Instruments that read low or drift, a controller that cannot hold its setpoint, lamps and fuses that fail repeatedly, and relays that chatter under load are the usual reasons. A panel that trips often is more likely to have a process cause than a panel fault; see the troubleshooting symptom index before ordering.
Fit and interchange
Supplied against the panel schedule or a photo of the panel interior and the nameplate of the failed component. Where an original component is obsolete, an equivalent of the same rating and function is offered, with the change recorded on the panel drawing. Hazardous area certification is matched to the classification of the panel location, and the panel is not modified without the certificate being checked.
Compliance
Information on this page is indicative. Final suitability and compatibility must be confirmed against your equipment, its serial or tag data and its operating conditions before order. Lead-time bands are indicative and are confirmed at quotation.
A crude oil degasser dehydrator is a two-vessel package: a degasser stacked above an electrostatic dehydrator on one skid. The crude flashes in the upper vessel…
An electrostatic coalescer prewash removes entrained caustic from kerosene after the caustic prewash of a kerosene sweetening unit. A high-voltage direct current (DC) field makes the…
In a refinery the crude oil desalter is the first process unit the crude meets, and everything downstream depends on it: preheat exchangers, the crude column…
A crude oil desalter and a crude oil dehydrator are the same vessel: a horizontal pressure vessel with electrode grids energised at high voltage by power…
A desalter power unit is the oil-filled transformer that energises the electrode grids of an electrostatic desalter or dehydrator. It steps the plant supply up to…
An electrostatic coalescer prewash removes entrained caustic from kerosene after the caustic prewash of a kerosene sweetening unit. A high-voltage direct current (DC) field makes the…
Performance surveillance is a daily engineering review of the signals that a dehydrator or desalter control system already records: interface level, power unit secondary voltage and…
Troubleshooting a desalter, dehydrator or hydrogen pressure swing adsorption (PSA) unit starts with the symptom, because each symptom has a short list of probable causes and…
Process and detailed design turns a requirement, often no more than a datasheet, into a complete package that a fabricator can build and an operator can…
A design review for capacity enhancement establishes what actually limits an existing crude oil treatment train or hydrogen purification unit, and which changes remove that limit…
Transformers & power units
SKU AH-EC-1006
Carries the high-voltage output of a desalter, dehydrator or prewash coalescer transformer or power unit out of the transformer tank and into the conduit…
Add to enquiry: Transformer bushing and power supply bushing
Transformers & power units
SKU AH-EC-1009
Energises the electrode grid of a crude oil desalter or dehydrator (electrostatic coalescer). The desalter power unit, also called the desalter transformer, is an…
Transformers & power units
SKU AH-EC-1011
Varies the input voltage to the DC power unit of an electrostatic coalescer prewash. A custom-made motorised auto-transformer (variac) on the primary side of…
Add to enquiry: Transformer voltage regulator (variac) for DC power unit
Transformers & power units
SKU AH-EC-1010
Energises the electrode grid of an electrostatic coalescer prewash (the electrostatic precipitator on the caustic prewash of a kerosene sweetening unit). Steps up and…
Add to enquiry: DC power unit for electrostatic coalescer prewash
Injection & mixing
SKU AH-EC-1007
Introduces a chemical or water stream into the process line ahead of an electrostatic coalescer, prewash coalescer or desalter mixing valve: demulsifier or wash…
Bushings & insulators
SKU AH-EC-1001
The desalter entrance bushing, also called the high-pressure entrance bushing, carries the high-voltage conductor from the transformer or power unit through the pressure boundary…
That is enough to start. Send what you have for a desalter, dehydrator, electrostatic coalescer or hydrogen adsorption unit, whoever built it, and we will identify the equipment and the parts it needs. Final compatibility is always confirmed against your equipment data and operating conditions.
