Bilge Water Separator (OWS 15ppm)
critical
IMO Required
MARPOL-mandatory oily water separator; max 15 ppm oil in discharge
2000h
Service Interval
5 yr
Class Survey
15 yr
Typical Lifetime
Typical Manufacturers
RWO
Alfa Laval
DVZ
Compass
Known Models (4)
Alfa Laval PureBilge 5.0
5.0 m3/h
· 2.2 kW
· Bilge water (oily)
Common Failures:
- • Membrane fouling
- • Oil content monitor failure
- • Auto-stop solenoid malfunction
Service: Membrane-based system; backflush membranes per schedule.
Spares: Alfa Laval: O-Ring-Satz und Betriebswasserventil an Bord vorhalten. Lead time: 2-6 Wochen je nach Hersteller.
Compass CPS-B 5.0
5.0 m3/h
· 1.5 kW
· Bilge water (oily)
Common Failures:
- • Filter element blocking
- • Oil content alarm
- • Discharge valve leak
Service: Compact unit; change filter elements when differential pressure high.
Spares: Compass: O-Ring-Satz und Betriebswasserventil an Bord vorhalten. Lead time: 2-6 Wochen je nach Hersteller.
DVZ OWS-COM 5
5.0 m3/h
· 1.5 kW
· Bilge water (oily)
Common Failures:
- • Coalescer media saturation
- • Oil monitor sensor contamination
- • Solenoid valve stuck
Service: Gravity-coalescer type; drain collected oil regularly.
Spares: DVZ: O-Ring-Satz und Betriebswasserventil an Bord vorhalten. Lead time: 2-6 Wochen je nach Hersteller.
RWO SKIT/S-DEB 5.0
5.0 m3/h
· 1.5 kW
· Bilge water (oily)
· Centrifugal Separator
Common Failures:
- • 15 ppm monitor drift/failure
- • Coalescer element fouling
- • 3-way valve malfunction
- • Emulsified oil bypass
Service: Replace coalescer element annually; calibrate 15ppm monitor per MEPC guidelines.
Spares: RWO: O-Ring-Satz und Betriebswasserventil an Bord vorhalten. Lead time: 2-6 Wochen je nach Hersteller.
✔ Pros
- • High efficiency in oil separation
- • Compact design for space-saving installation
- • Compliance with international maritime regulations for bilge water discharge
- • Annual maintenance is relatively straightforward with the replacement of the coalescer element
- • Calibration of the 15 ppm monitor is guided by MEPC guidelines for consistency
⚠ Cons
- • 15 ppm monitor drift or failure can lead to non-compliance
- • Coalescer element fouling can reduce efficiency and require more frequent replacement
- • 3-way valve malfunction can disrupt the separation process
- • Emulsified oil can bypass the separator, affecting its overall performance
Typical Vessels:
TankerContainerBulk CarrierGeneral Cargo
Certifications:
IMO D-2
Decision Guide: Choose if you need a reliable and compact bilge water separator that meets international standards. Avoid if your vessel frequently encounters emulsified oil or if you lack regular maintenance schedules for the coalescer element and monitor calibration.
Use Cases: Typically deployed on various types of vessels that require efficient bilge water treatment to comply with maritime regulations, especially in areas with strict environmental protection laws.