INDRON® rotary shaft seals researched and developed by Techemer
Composites contains lubricating materials, which can protect the
tail shaft of the yacht. Compared with ordinary materials, it not
only has the form of grease-free self-lubrication or
water-lubrication, has the characteristics of super shock
resistance and impact resistance, but also has a low friction
coefficient and a long service life, which is twice that of general
marine product materials.
Water Pi ck-up Point:
1. Water nozzle between the radiator and the vertical tube (as
close as possible to the radiator).
2. Water nozzle between oil cooler and radiator.
3. Water nozzle between water pump and oil cooler .
4. Drain plug behind the water pump. (make sure the pressure of the
pump is drainable) .
5. Radiator drain plugs .
6. Oil cooler drain plug (cooler bore at least 200 inches if cooler
is under pump pressure)
Material Grade| Material Grade | | Bearing(lining) | INDRON®TSTN | INDRON®HRBR | INDRON®HAWF | INDRON®UNIV | INDRON®PLAT | | Material | Synthetic Engineering Elastomers | Synthetic Engineering Elastomers | SyntheticEngineering Elastomers | Synthetic Engineering Elastomers | Synthetic Engineering Elastomers | | Recommended Workplace | Guide Bearings & Seals | Guide Bearings& Seals | Guide Bearings & Seals | Guide van, connecting rod bushing | Guide vane, connecting rod bushing | | Temperature Limit | 70℃ | 70℃ | 70℃ | 70℃ | 70℃ | | Dry Rub | Yes | low speed | low speed | Yes | Yes | | Acid Resistance | limit | limit | limit | limit | limit | | Alkaline Resistant | limit | limit | limit | limit | limit | | Hydrocarbon Suitability | Yes | Yes | Yes | Yes | Yes | | Abrasion Resistance | good | excellent | excellent | good | good | | Friction Pair(bushing) | bronze | HRC40 | HRC40 | HRC40 | HRC40 | | Stainless | recommend | recommend | recommend | recommend | | Typical Application | water, sea water | water, sea water | water, sea water | water, sea water | water, sea water | | Most fluids(pH 5-10) | Most fluids(pH5-10) | Most fluids(pH5-10) | Most fluids(pH 5-10) | Most fluids(pH5-10) | | Note | Lowest coefficient of friction,suitable for dry running
applications, good wear resistance | Use silt water under moderate grinding conditions | Use ofsilt-containing water under high grinding conditions.
Contains abrasion resistant | high load capacity | high load capacity |
Material Performances| Property List of INDRON® Elastic-plastic Alloy | TSTN | CFlon | PLAT | hRBR | | Properties | Unit | Test Method | Typical Value | | Physical Property | | Density | g/cm3 | GB/T 1033.1 /ISO 1183.1 | 1.16 | 2.05 | 1.23 | 1.1 | | Mechanical Properties | | Tensile Strength | MPa | GB/T 1040.2 /ISO 527.2 | 40.3 | 22.9 | 30 | 20.3 | | Elongation at Break | % | GB/T 1040.2/ISO 527.2 | 300 | 560 | 150 | 421 | | Shore Hardness | ° | GB/T 2411/ISO 868 | 62~66D | 68D | 67~76D | 85~95A | | Water Absorption Mass (Saturated) | % | GB/T 1690/ISO 1817 | 1.2 | 1.2 | 1 | 1.2 | | Water Absorption Volume (1080h) | % | GB/ T1690/ISO 1817 | 1.4 | 1.4 | 0.9 | 1.7 | | Charpy Impact Strength (Notched) | kJ/㎡ | GB/T 1043.1/ISO 179.1 | 110 | 100 | 120 | — | | Compressive Strength | MPa | GB/T 1041/ISO 604 | 24.6 | 28.8 | 38 | 3.8 | | Modulus Compression | MPa | GB/T 1041/ISO 604 | 423 | 828 | 600 | 60 | | Compressive Set (24h) | % | GB/T 7759/ISO 815 | 25 | — | — | 13 | | Maximum Load Capacity (Low-speed oscilating at 25% strain ) | MPa | | 26 | 25 | 38 | 5 | | Maximum Load Capacity (continuous operation at 25% strain ) | MPa | | 10 | 10 | 20 | 3 | | Maximum Operation Temperature (in water) | °C | | 70 | 100 | 70 | 70 | | Maximum Operation Temperature (Dry) | °C | | 110 | 260 | 110 | 110 | | Tribology Property | | Relative Volume Wear (by Rotating Cylinder Drum) | mm3 | GB/T 25262/ISO 23794 | 138 | 200 | 136 | 84 | | Limiting PV (Seawater Cycling, Linear Speed 5.13m/s) | MPa·m/s | GB 7948-87 | 101.3 | — | — | — | | Limiting PV (Dry Frition, Linear Speed 5.13m/s) | MPa·m/s | GB 7948-87 | 1.69 | — | 2.3 | 1 | | Coefficient of Dynamic Friction (Water) | | GB 7948-87 | 0.08-0.16 | 0.05-0.15 | 0.08-0.16 | 0.08-0.16
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What bearing materials are more suitable as the materials used for
water pump guide bearings, Babbitt alloy, rubber, ceramics or new
polymer materials? It is advisable to take account of the
lubrication requirements, use environment and maintenance cycle of
the equipmentCOMMON GUIDE BEARING MATERIALS| Bearing type | INDRON bearing | AR bearing | Ceramic bearing | Rubber bearing | Babbitt alloy bearing | | Characteristics | The performance is close thordon, which can use more equipment
assembly methods. In addition to traditional installations by
freezing and pressurizing. It can also be installed by coating
reactive thermal polymerization Dx and cold sticking. | Good wear resistance and impact resistance. The bearing hardness is
high; the shaft sleeve is easy to wear; the temperature difference
changes greatly; there will be the risk of shelling; the price is
high. | Wear-resistant, heat-resistant, corrosion-resistant, lubricated by
pump circulating water, capable of dry grinding for a short time,
high requirement on accuracy in processing and assembly, fragile
and the most expensive. | It has a long history and mature manufacturing process, featured by
wear resistance, anti-seismic, impact resistance, convenient
assembly/disassembly and low price (only 20% of ceramic bearings
price) | Wear resistance and impact resistance require a set of more
complicated sealing and lubricating devices and mechanisms. | | Lubricating requirements | Clean water can be used for lubrication or 150s dry start according
to the material grades. | Dry start more than 180S without clean water lubrication. | It can be lubricated by pumping medium without special clean water
lubrication. | Clean industrial water | Grease lubrication requires a grease supply lubrication system. | | Working temperature | ≤70ºC | ≥273ºC | The bearing itself can withstand the temperature of 1,400ºC | ≤50ºC | ≤65ºC
Short time up to 80ºC | | Application site | For pumping stations short of clean water or pumping stations
requiring short-term dry friction, hRBR grade is suitable for water
quality with moderate sediment content. | Pumping stations without clean water or pumping stations requiring
dry friction of more than 180S. | Pumping stations without clean water or pumping stations requiring
short-term dry friction. | Extensive application in any pumping stations with clean water
sources. | The liquid of the pump itself cannot be used for bearing
lubrication in the pumping station. | | Bearing type | INDRON bearing | AR bearing | Ceramic bearing | Rubber bearing | Babbitt alloy bearing |
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