 HYDROX 21
 Overview | More Information
Request Health & Safety Data | Principles of Hydrox | Cost savings
The Solution to Outboard Oil Leakage
HYDROX 21 is a high quality sterntube oil which reduces oil leakage and pollution when the sterntube seals are damaged. It also protects against water ingress in the same way as other HYDROX grades.
Compatibility with other oils
HYDROX 21 is compatible with most conventional lubricants used for sterntube lubrication. It can therefore be added gradually by a process of topping up. As the proportion of HYDROX 21 in the system increases, leakage can be expected to reduce progressively.
HYDROX BIO 220
A biodegradable, non toxic version of HYDROX 21 is also available.
Case Study
Leakage rate is normally reduced by at least 70%, even where leakage is due to severely damaged seals.
Case Study 2
| Vessel |
Year 1 |
| Reefer 9979 dwt Built 1982 |
July: 3.6% water content – HYDROX 21 used as standard sterntube oil |
| Sterngear |
Year 3 |
Total oil
capacity – approx. 2300 litres
Shaft diameter = 522mm
Shaft length = 5845mm
White Metal Bearings
Forward = 550mm
Aft = 1064mm
Plus skid bearing
Seal – Rubber lip seal – multi ring design |
May: 8.6% water content
Dec: 3.6% water content plus slight bacterial infection |
| Year 4 |
April: 26.7% water
content
Aug: 10.9% water content plus slight bacterial infection |
| Original
|
Year
5 |
| SAE 30 Engine Oil -
Changed to cylinder oil (260cSt@40°c) to combat leakage before introduction
of HYDROX 21 |
Sept: 25.5% water content
Nov: 11.9% water content
Nov: Metal Analysis results obtained - Metal ppm, Copper 1, Iron 1,
Lead 7, Nickel 0, Tin 2 |
| April Year 1 |
Year 6 |
| Vessel has been dry
docked. Normal sterntube oil consumption not recorded but high consumption
began to occur ranging from 230 litres – 400 litres per day though
variable. Cylinder oil and then HYDROX 21 added by top up procedure.
Diver inspection showed no obvious fault with the seal. |
April: Vessel
dry docked. Shaft and bearings inspected and found to be in excellent
condition and with no work required. |
| June Year1 |
Reported Sterntube oil
consumption for complete trip reduced to 600 litres compared to 2000
litres for previous similar voyage.
Oil sample taken = 3.3% water content |
Performance acknowledged by classification societies
HYDROX 21 is certified under Lloyds Product Verification Scheme
HYDROX 21 is certified under the ABS Type Approval Scheme. HYDROX 21 is certified under the Bureau Veritas Type Approval Scheme.
DNV normally allow vessels to operate with up to 15% water in the HYDROX 21 emulsion.
 Go back
|
