Detegasa Waste Treatment
Spare Parts Supplier
Engine-room supply for Detegasa oily water separators, sewage treatment plants and marine incinerators — OWSAN · DELTA OWSA · STPN · PRBN · MBR · IRA · IRLA
Detegasa plants found in engine rooms and machinery spaces
Detegasa is a Spanish maker from Galicia, founded in 1985 and based near Ferrol; its technical specifications print the name as the acronym of Desarrollos Tecnicas Industriales de Galicia, S.A. It designs and builds its whole range at its facilities in Spain and groups its shipboard equipment as waste treatment: oily water separators, sewage treatment plants and incinerators, alongside food waste equipment. It works for navy, offshore and commercial marine customers, and its older specifications present the equipment as DELTA type rather than under the Detegasa name.
OWSAN-0.5 · OWSAN-1 · OWSAN-2.5 · OWSAN-5 · OWSAN-7.5 · OWSAN-10
The two-stage bilge separator in Detegasa's current brochure: a coalescent filter in the first stage separates free oil by gravity, and an adsorption filter in the second stage breaks emulsions, with a suction-type pump feeding the unit. Adsorption cartridges, the coalescent filter element, suction pump wear parts and monitor items are the recurring lines; the figure after OWSAN is the size and belongs in the request.
OWSAN-P
The newer OWSAN model, whose control panel integrates the oil monitor and the operator interface. On a -P unit the monitor items are quoted against the panel rather than as a separate bilge alarm, alongside the same cartridge and filter lines as the OWSAN.
DELTA OWSA
A DELTA-type two-stage design built to IMO MEPC.107(49): a gravity static separator followed by an adsorption stage. Adsorption cartridges, pneumatic valve items for oil discharge, overboard, recirculation and adsorption bypass, the flushing solenoid valve and the 15 ppm bilge alarm monitor parts are the recurring lines.
DELTA OWS
The older separator built to IMO MEPC.60(33), with a tank and internals, a pump, pneumatic valves and electrode-controlled oil discharge. The oil content monitor was an option on this build, so confirm whether one is fitted before monitor parts are listed.
STPN · DELTA STPN
Aerobic biological sewage plant for black and grey water, offered in modular or containerised versions and suited to vacuum or gravity collection. Air blower items, the effluent discharge pump, dosing equipment where chemical disinfection is fitted, and level and control items are the usual lines; send the plant figure from the plate as written.
PRBN · DELTA PRBN
Biological plant for black water only, built for a reduced footprint. Blower and discharge pump items are the recurring lines, with dosing items where fitted; state PRBN rather than STPN, since the two treat different waste streams.
MBR
Membrane bioreactor plant for large crews: collecting, aerobic and membrane tanks, with submerged membranes that Detegasa names as Mitsubishi Rayon and automatic backflushing, and no chemicals needed for disinfection. Membrane modules, the recirculation pump and aeration items are the recurring lines.
IRA
Marine incinerator designed to burn solid waste only. Diesel-oil burner items, exhaust gas fan and damper items, exhaust-gas thermocouples, refractory blocks and door and sluice seals are the recurring lines; the size follows the letters, as in IRA-10.
IRLA
Incinerator designed to burn solid waste and sludge, simultaneously where required. Next to the burner, fan, damper and refractory items it may carry Detegasa's optional sludge tank, whose heating, sludge circulation pump, level switches and safety valves form their own group of lines. Sizes are written as in IRLA-50.
DELTA IR-10
A DELTA solid-waste incinerator type from an older Detegasa specification: incinerator, diesel-oil burner and control panel on a baseplate, with the exhaust gas fan, regulating damper and exhaust-gas thermocouple supplied loose. The specification lists those loose items separately, so name them as separate lines.
Where a Detegasa plant usually comes back to the parts list
Each of the three plants wears in its own way, and naming which of these points is in front of you shortens the request considerably.
Adsorption cartridges on emulsified bilge water
On the OWSAN, Detegasa checks water quality continuously at both stages so that the adsorption filters are bypassed whenever possible, and the DELTA OWSA has its own adsorption-tank bypass valve. Cartridges are therefore consumed in step with how emulsified the bilge water is: detergents and fine emulsions bring the second stage into service and shorten cartridge life. A plant that renews cartridges far more often than its sister ship is usually reporting on its bilge, not on its separator.
Oil-level electrodes and the automatic oil discharge
On DELTA OWS and OWSA units, separated oil leaves through an automatic discharge system built on electrodes and a sensor relay. Electrodes that sit in oily water foul over time, a fouled electrode misreads the oil layer, and the plant either holds oil too long or passes water to the oil outlet.
Pneumatic valves and the flushing circuit
On the DELTA OWSA, oil discharge, overboard discharge, recirculation and the adsorption bypass are pneumatic piston-operated valves, and flushing water enters through a solenoid valve. Actuator seals and a clean control-air supply decide whether the automatic sequence runs at all; a sticking valve stops the sequence before it ever shows as a leak.
Aeration and dosing on STPN and PRBN plants
On a biological plant the treatment depends on the air blower and the aeration line, and, where chemical disinfection is fitted, on the dosing pump. Blower wear and a weak dosing pump show up first as poor effluent quality rather than as a machinery failure.
Membrane modules on an MBR plant
The membranes are the physical barrier and are kept open by automatic backflushing. Once backflushing no longer recovers them, the modules themselves become the parts question, and the module follows the plant build.
Refractory, burner and draught
Detegasa describes its incinerators as modular, with the refractory delivered as self-locking modular blocks and a bolted body, so lining damage can be described block by block rather than as a cast repair. Combustion rests on the diesel-oil burner, the exhaust gas fan, the regulating damper and the exhaust-gas thermocouple; where an IRLA has the optional sludge tank, its heating and circulation pump wear separately from the combustion side.
What a Detegasa line usually resolves to
Grouped by plant, because a separator cartridge, a sewage plant blower and an incinerator refractory block are three different kinds of request. Broader engine-room routing sits on engine room equipment.
- Adsorption cartridges for the second stage of OWSA and OWSAN separators
- Coalescent filter elements for the OWSAN first stage
- Oil-level electrodes and sensor relay items for the automatic oil discharge of DELTA OWS and OWSA units
- Actuator and seal items for the pneumatic oil discharge, overboard, recirculation and adsorption-bypass valves
- Flushing-water solenoid valves and safety valves
- Separator pump wear parts and gasket sets
- 15 ppm bilge alarm monitor items, quoted against the monitor actually fitted
- Air blower and aeration items for STPN and PRBN plants
- Dosing pump and effluent discharge pump items
- MBR membrane modules and recirculation pump items
- Incinerator diesel-oil burner items, exhaust gas fan and regulating damper items, exhaust-gas thermocouples
- Refractory modular blocks, door and sluice seals, and sludge tank heating, circulation pump and level switch items
The plate data that makes a Detegasa request quotable
Detegasa equipment appears under two names, Detegasa and DELTA, so what is written on the plate matters more than what the ship's list calls it. If the plate is painted over, the drawing list in the manual, the type approval certificate or an old order reference identifies the plant just as well; the RFQ evidence guide covers what to attach.
- The designation exactly as on the plate, DELTA included where it appears, for example DELTA OWSA, OWSAN-2.5 or IRLA-50
- Serial or works number
- Year of build
- For a separator: whether the plate reads OWS, OWSA, OWSAN or OWSAN-P
- The IMO resolution on the type approval certificate: MEPC.60(33) or MEPC.107(49) for a separator, MEPC.159(55) or MEPC.227(64) for a sewage plant, MEPC.76(40) or MEPC.244(66) for an incinerator
- The discharge standard the separator is set for, 15 ppm or the 5 ppm option
- Which bilge alarm monitor is fitted, and whether it is built into the control panel
- For a sewage plant: STPN, PRBN or MBR, and the plates of the blower and the dosing pump
- For an incinerator: IRA or IRLA, whether a sludge tank or bilge water injection is fitted, and how the sludge tank is heated
- Drawing or document numbers from the Detegasa manual, photographs of the plate and the removed part, and the port and ETA
Tools for this equipment: the shore connection flanges page for the MARPOL sewage discharge flange. For the pneumatic valves of the oily water separator, the pneumatic cylinder air calculator gives the control air a valve cylinder takes per stroke and per minute.
Three plants, three kinds of review
A Detegasa line is placed under its plant before anything else, because a separator cartridge, a sewage plant blower and an incinerator block are approved, worn and supplied in different ways. Vessel Core marks the proposed route against each line, OEM-route or verified alternative, rather than against the Detegasa name as a whole.
Separator consumables against the certificate
Adsorption cartridges, coalescent filters and monitor items bear on the approved discharge performance, so the type approval certificate reference and the 15 or 5 ppm setting come first. An OEM-route item or a verified alternative is reviewed against that certificate, not against the OWSAN name alone.
Valves, pumps and seals on plate evidence
Valve actuator seals, solenoid valve items, pump wear parts and gaskets are mechanical items once the designation and serial are settled, and they are where a verified alternative is most often worth reviewing.
Biological plant or MBR
Detegasa's specification for the DELTA PR plant names the blower by make and type, so the blower and dosing pump plates are often a better reference than the plant designation. Membrane modules follow the plant build and the membrane source Detegasa specifies, so the module reference is read from the manual.
Incinerator combustion and lining
Burner, fan, damper and thermocouple items are read against the IRA or IRLA size and the control panel; refractory goes by block position in the modular lining; sludge tank items travel as their own lines and are read against the tank and its heating medium.
Detegasa equipment — questions buyers ask
The plate says DELTA, not Detegasa. Is it the same maker?
Very likely, when the letters after DELTA are OWS, OWSA, STPN, PRBN, PR or IR. Detegasa's own specifications present its equipment as DELTA type, as in DELTA OWS, DELTA OWSA, DELTA STPN, DELTA PRBN and DELTA IR, its incinerators are still sold as the DELTA Marine Incinerator, and those specifications print the company name as the acronym of Desarrollos Tecnicas Industriales de Galicia, S.A. Send the designation exactly as written, DELTA included, with the serial number; the type letters after DELTA identify the plant.
Does it matter whether my separator is an OWS, an OWSA or an OWSAN?
Yes, because the three are different builds. The DELTA OWS was built to MEPC.60(33) with the oil monitor as an option; the DELTA OWSA adds an adsorption stage and a 15 ppm bilge alarm monitor under MEPC.107(49); the OWSAN pairs a coalescent filter with an adsorption filter, and the OWSAN-P carries the oil monitor in its control panel. Cartridges, valves and monitor items differ between them.
What should a Detegasa sewage plant request state?
Whether the plant is STPN for black and grey water, PRBN for black water only, or MBR, the membrane bioreactor; the designation and serial from the plate; and the plates of the blower and the dosing pump if those are the items needed. On an MBR plant, list the membrane modules as their own line.
IRA or IRLA: what changes in the parts list?
IRA incinerators burn solid waste only; IRLA incinerators burn solid waste and sludge. An IRLA may therefore carry Detegasa's optional sludge tank, with its heating, sludge circulation pump, level switches and safety valves, which an IRA does not need. Send the series and size as written, for example IRLA-50, and say which refractory blocks are damaged, since Detegasa delivers the refractory as modular blocks.
Can an alternative be reviewed instead of the Detegasa part?
For some lines. All three plant types are type-approved: separators under MEPC.107(49) or the older MEPC.60(33), sewage plants under MEPC.227(64), incinerators under MEPC.76(40) and MEPC.244(66). Cartridges, filters, monitor items, membranes and combustion controls are therefore reviewed against the certificate reference, while gaskets, valve seals and pump wear parts can be reviewed as verified alternatives on plate evidence.
Is Vessel Core connected to Detegasa?
No, and there is no agreement of any kind. Vessel Core holds no distribution, representation or partnership agreement with Detegasa, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Send the plate, DELTA included.
Send your Detegasa request with the designation as written on the plate, the serial number and the type approval certificate reference. Vessel Core reviews the supply route and prepares a structured supply quotation.
