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Overview
An oil mist detector that has not been serviced on schedule is not a reliable safety system — it is a liability dressed up as one. The optical measurement cells at the heart of Graviner MK6 and MK7 detectors accumulate oil contamination, dust, and crankcase deposits over time. As that contamination builds, the detector’s measurement accuracy degrades — and with it, the system’s ability to provide reliable early warning of a developing oil mist condition. A detector that reads low due to a contaminated optical cell is a detector that may not alarm when it should. Regular servicing with the correct kit is what keeps the Graviner detector’s measurement performance at the standard the system was designed and approved to deliver.
The Graviner Service Kit — Part No. D9221-027 is the OEM-specified service kit for both the Graviner MK6 and MK7 oil mist detector units. It contains the cleaning materials, replacement seals, consumable components, and tooling required to carry out a complete detector service — restoring the optical measurement cell and associated detector components to the condition necessary for accurate, reliable oil mist concentration measurement. The product image shows the complete kit contents: the Graviner-branded box, the ASC optical cleaning solution bottle, the cleaning swab, replacement O-rings, small hardware items, and the hex key tool required for detector access.
The differentiating value of this service kit over sourcing generic cleaning materials and consumables is straightforward: the D9221-027 contains exactly what Graviner specifies for MK6 and MK7 detector servicing — not approximations. The ASC optical cleaning solution is formulated to clean the detector’s optical components without leaving residues that would affect subsequent measurement accuracy. The replacement seals are dimensioned to the detector’s OEM specifications. Using the correct OEM service kit is the only way to ensure that a serviced detector meets the same measurement performance standard as a new unit — which is the standard that class society surveyors and the IMO crankcase detector performance requirements expect the installed system to maintain.
Key Features
Compatible with Both MK6 and MK7 Detector Units
The D9221-027 service kit is specified for use on both the Graviner MK6 and the current MK7 oil mist detector — covering both generations of the Graviner distributed detector platform in a single kit. For vessels operating MK6 systems, or for ship management companies with a mixed fleet of MK6 and MK7 installations, this cross-compatibility means a single service kit part number covers the detector servicing requirement across both system generations. Procurement teams do not need to manage separate kit specifications for each detector generation.
ASC Optical Cleaning Solution — Purpose-Formulated for Detector Optics
The kit includes the ASC (Anti-Static Cleaner) optical cleaning solution — the Graviner-specified cleaning agent for the MK6 and MK7 detector’s optical measurement cell. The ASC solution is formulated to remove oil contamination and crankcase deposits from optical surfaces without leaving cleaning agent residues that could affect the detector’s light scattering measurement after servicing. Using a generic optical cleaning product in place of the ASC solution introduces the risk of residue contamination that could cause the detector to read incorrectly after service — undermining the purpose of carrying out the service in the first place.
Replacement O-Rings and Seals — OEM-Dimensioned for Detector Integrity
The kit contains replacement O-rings and seals dimensioned to the Graviner OEM specification for the MK6 and MK7 detector. The seals maintain the integrity of the detector’s optical cell chamber — preventing crankcase oil mist, moisture, and contaminants from entering the measurement cell during operation. Reusing worn or compressed seals after a service is a common source of premature detector contamination in the weeks following servicing, requiring a repeat service before the next scheduled interval. The OEM-dimensioned replacement seals in this kit ensure the detector is correctly resealed after cleaning for the full service interval.
Cleaning Swab — Correct Application Tool for Optical Surface Cleaning
The kit includes a purpose-made cleaning swab for applying the ASC solution to the detector’s optical surfaces — the light source and photodetector windows that are the core of the MK6/MK7 measurement cell. Using the correct swab type and technique for optical surface cleaning is important: abrasive or fibrous cleaning materials can leave micro-scratches on optical surfaces that scatter light independently of oil mist and introduce a persistent measurement offset. The included swab is selected to clean the optical surfaces effectively without the risk of surface damage that could permanently affect the detector’s measurement accuracy.
Hex Key Tool — Detector Access Without Additional Tooling
The kit includes the hex key required to access the detector’s internal components for servicing — as visible in the product image. Having the correct-size tool included in the kit means the service can be carried out without needing to source the correct hex key separately, which matters when a service is being carried out in a port call window or at sea during a maintenance period where workshop tooling access may be limited. It is a small detail, but it is the kind of completeness that makes the difference between a service kit that enables efficient onboard maintenance and one that creates a tooling sourcing problem at the wrong moment.
Hardware Items — Small Components for Complete Detector Restoration
The kit includes the small hardware items — screws, clips, or fasteners — required to complete the detector service and reassembly to the OEM specification. These items address the reality that small hardware components are often lost, damaged, or corroded during disassembly of a detector that has been in continuous crankcase service for 12 months or more. Having replacement hardware in the service kit ensures the detector is reassembled correctly and completely — not with missing or reused damaged fasteners that compromise the integrity of the reassembled unit.
New Condition — OEM Kit, Sealed and Shelf-Stable for Onboard Spares
The D9221-027 service kit is supplied new and sealed — appropriate for holding as an onboard spare in the vessel’s planned maintenance system inventory alongside the MK6 or MK7 detector service schedule. Holding a service kit onboard means detector servicing can be carried out at the scheduled interval without waiting for kit procurement from a shore-based supplier — a practical consideration for vessels on long voyages or operating on routes where port procurement turnaround is measured in days rather than hours.
Technical Specifications
Part Number: D9221-027
Manufacturer: Graviner (Kidde / UTC Fire & Security)
Compatible Detectors: Graviner MK6 and MK7 oil mist detector units
Kit Contents: ASC optical cleaning solution; cleaning swab; replacement O-rings and seals; small hardware items; hex key tool
Application: Scheduled detector optical cell cleaning and seal replacement
Category: Oil Mist Detector Maintenance
Condition: New
Benefits
Maintains detector measurement accuracy at the performance standard required for class survey compliance. IMO Resolution A.1050(27) and classification society rules require crankcase oil mist detectors to be maintained in a condition that meets the system’s approved performance standard. A detector with a contaminated optical cell that has drifted in measurement accuracy is not meeting that standard — regardless of whether it is generating fault alarms. Regular servicing with the D9221-027 kit ensures the detector’s optical measurement performance remains within the manufacturer’s specification and the class-approved system performance envelope.
Prevents premature detector failure between service intervals. A contaminated detector that is not cleaned on schedule accumulates deposits progressively — eventually reaching a point where the optical cell is sufficiently obscured to trigger an optical fault alarm, taking the detector offline entirely. Regular scheduled cleaning with the OEM service kit prevents that progressive contamination from reaching the fault threshold, extending the useful service interval of each detector and avoiding unplanned system downtime caused by a contamination-driven optical fault.
Correct OEM kit eliminates post-service measurement errors caused by incompatible cleaning materials. A detector serviced with non-specified cleaning agents or incorrect seal materials may actually perform worse after service than before — with optical surface residues causing measurement offsets or incorrect seals failing to prevent re-contamination within weeks of the service. The D9221-027 kit contains exactly what Graviner specifies: the ASC solution formulated for detector optics and the OEM-dimensioned seals that maintain the detector’s environmental integrity for the full service interval.
Single kit part number covers both MK6 and MK7 detector servicing. For ship management companies and vessel operators with both MK6 and MK7 systems in their fleet — whether as mixed system installations or as an MK6 fleet transitioning toward MK7 — the D9221-027’s compatibility with both detector generations simplifies spare parts inventory management. One kit, one part number, two detector generations covered.
Onboard kit availability enables servicing at sea or during port call without procurement delays. Holding a D9221-027 service kit as an onboard spare means the maintenance engineer can carry out a scheduled or unscheduled detector service at the planned maintenance interval — or in response to an early optical fault indication — without waiting for kit delivery from a shore supplier. On a vessel operating on a tight port call schedule or a long ocean passage, that onboard availability is the difference between a service carried out on time and a service deferred to the next convenient port.
Who It’s For
The Chief Engineer or Second Engineer Managing MK6 or MK7 Detector Maintenance
Your vessel’s planned maintenance system has the MK7 detector service scheduled for the next port call. You need the D9221-027 service kit to carry out the service — the ASC cleaning solution, replacement seals, and the correct tooling. You could attempt to source a generic optical cleaning kit from a general marine supplier, but you know from experience that using a non-specified product on a safety system detector creates uncertainty about whether the detector will pass its post-service accuracy check — and you’d rather not find out the hard way during a class survey. You want the OEM kit with the correct part number so the service is carried out to the manufacturer’s specification without question.
The Technical Superintendent or Fleet Manager Building Onboard Spare Parts Inventories
You manage a fleet of vessels with Graviner MK6 and MK7 oil mist detection systems, and detector servicing is a routine planned maintenance requirement across the fleet. You’re building out the onboard spare parts inventory standard for the fleet’s oil mist detection systems, and the service kit is an obvious inclusion — one D9221-027 per vessel covers both MK6 and MK7 detector servicing needs regardless of which system variant is installed. Standardising on the OEM kit across the fleet means every vessel’s detector service is carried out to the same specification, and your fleet maintenance records reflect consistent OEM-standard maintenance across all oil mist detection systems.
Possible Applications
- Scheduled MK6 and MK7 detector optical cell cleaning — Routine planned maintenance service of individual Graviner MK6 and MK7 detector heads at the manufacturer’s recommended service interval, maintaining optical measurement accuracy and seal integrity
- Pre-survey detector servicing for class machinery survey preparation — Detector cleaning and seal replacement immediately before a scheduled class survey to ensure all MK6/MK7 detectors present in fully serviced condition and meet the surveyor’s operational verification expectations
- Unscheduled servicing in response to early optical contamination indicators — Detector service carried out ahead of the planned schedule in response to a rising optical fault indication or unexplained measurement drift, restoring detector performance before an optical fault takes the detector offline
- Post-installation commissioning service on new MK6 or MK7 detector installations — Initial detector cleaning and seal verification following system installation or recommissioning after a period of system inactivity
- Drydock planned maintenance period detector overhaul — Systematic service of all MK6 and MK7 detectors during drydock maintenance periods as part of a comprehensive oil mist detection system overhaul programme
- Fleet onboard spare parts standard — long voyage provisioning — Kit held onboard as a spare on vessels operating on deep-sea routes where port procurement turnaround is impractical and detector service must be carried out at sea or with minimal port stop time
- Marine engineering service company service kit supply — Kit procurement for contractors carrying out Graviner MK6 and MK7 detector service work on behalf of vessel owners under planned maintenance contracts
Trust and Certifications
Graviner OEM Service Kit — Specified for MK6 and MK7 Detector Maintenance
The D9221-027 is Graviner’s own OEM-specified service kit for the MK6 and MK7 detector platform — not a third-party maintenance kit approximating the manufacturer’s specification. Using the OEM service kit provides the assurance that the cleaning materials and replacement components used in the service are exactly what the manufacturer designed and tested for this detector family. For a safety-critical detector whose measurement accuracy directly determines the system’s ability to provide early warning of a crankcase oil mist condition, that OEM specification assurance is not a premium — it is the minimum acceptable standard for a safety system service.
IMO Resolution A.1050(27) — Maintenance of Crankcase Oil Mist Detector Performance
IMO Resolution A.1050(27) requires crankcase oil mist detectors to be maintained in accordance with the manufacturer’s maintenance instructions to preserve the system’s approved detection performance. The D9221-027 service kit, as the manufacturer-specified maintenance kit for the MK6 and MK7 detector, is the correct servicing tool for maintaining IMO A.1050(27) compliance — providing the documented manufacturer-specified maintenance that the resolution’s maintenance requirements encompass.
Classification Society Planned Maintenance System Requirements
Classification societies require that safety-critical equipment — including crankcase oil mist detectors — is maintained under a documented planned maintenance system (PMS) that follows the manufacturer’s recommended maintenance intervals and procedures. Using the OEM service kit for MK6 and MK7 detector servicing provides the audit trail that class surveyors expect when reviewing the vessel’s PMS maintenance records for oil mist detection systems: manufacturer-specified kit, correct part number, serviced to OEM procedure.
New Condition — Sealed OEM Kit with Full Shelf Life
The D9221-027 service kit is supplied new and sealed — with the full remaining shelf life of the ASC optical cleaning solution and the replacement seals intact. For kits held onboard as planned maintenance spares, new sealed condition ensures the kit contents retain their specified effectiveness until the service is carried out, without the degradation risk of an opened or previously used kit stored for an extended period.
Supplied by Alright Engineering Solutions
The Graviner D9221-027 Service Kit is supplied through Alright Engineering Solutions Pte. Ltd., a specialist distributor of marine safety equipment and oil mist detection system components based in Singapore. Alright Engineering Solutions provides OEM spare parts and service kit sourcing for Graviner MK6, MK7, and MK-5 oil mist detection systems across the Singapore and regional marine market.
Accessories and Variants
Graviner MK7 Detector — Black Label (Current Production)
When a MK7 detector has exceeded its serviceable life or sustained damage that makes servicing impractical, replacement with a new black label MK7 detector is the appropriate maintenance action. Available new from Alright Engineering Solutions.
Graviner MK7 53836-K271 Touch Screen Remote Display Unit
The MK7 Remote Display Unit provides centralised touchscreen monitoring of MK7 system oil mist levels from the engine control room — the system-level component that complements detector-level maintenance for complete MK7 system upkeep.
Graviner MK-5 System Spare Components
For vessels maintaining Graviner MK-5 pipe-based oil mist detection systems, Alright Engineering Solutions stocks refurbished MK-5 spare components — main PCB assemblies, pressure switch assemblies, and complete MK-5 control bulk units.
Related Marine Engine Room Safety Products
Graviner MK7 Complete Oil Mist Detection System — Full MK7 system for new installations, multi-engine coverage up to 100 crankcase spaces
GTYQ-DX 102 Fixed Combustible Gas Detector — Fixed gas detection for engine room hydrocarbon monitoring
GX-8000 Sample Draw Multi Gas Monitor — Portable marine multi-gas monitor for confined space entry and engine room gas surveys
Get in Touch
If you need to source the Graviner D9221-027 Service Kit for MK6 and MK7 detector servicing — whether for an immediate maintenance requirement, a pre-survey service programme, or fleet-wide onboard spare parts provisioning — contact Alright Engineering Solutions to confirm availability and request a quotation.
Our team can also assist with sourcing the full range of Graviner MK6, MK7, and MK-5 oil mist detection system components and service kits for your vessel or fleet maintenance programme.
📍 3791 Jalan Bukit Merah #06-01, E-Centre @ Redhill, Singapore 159471
