Service life
Service life of rubber flexible joints
The service life of rubber flexible joints in typical air conditioning hygiene piping lines (excluding hot water supply lines) from installation
is calculated as per the following formula.
Note that the standard service life is 10 years, and the various coefficients are chosen from the following table based on the individual factors.
Service life = standard service life (10 years) x coefficient 1~coefficient 9
| Coefficient No. | Factor | Coefficient value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Coefficient1 | Coefficient related to the distinctive structure, materials, and shape etc. of products |
Product name | SILENT CONNECTOR |
PT CONNECTOR(S) TOZENFLEX OFLEX |
ELBOFLEX | LINERFLEX | PURE JOINT | BF-CONNECTOR TOUGHBOYTOUGHLEX |
KINGFLEX 20 20 |
L Series | DOLENEX FLEXIDRAIN HOUSEDRAIN SESMICJOINT |
|
| Vibration isolation | 1.5 | 1.1 | 1.0 | 1.0 | 1.1 | 1.5 | 1.5 | 1.2or1.5※1 | ||||
| Flexibility | 1.0 | 1.0 | 1.0 | 1.2 | 1.1 | 1.0 | 1.0 | 1.2or1.5※1 | 1.0 | |||
| Coefficient2 | Coefficient related to fluid maximum working pressure |
1.0MPaor less | 1.0 | |||||||||
| Greater than 1.0MPa | 1.0 | |||||||||||
| Greater than 1.37MPa 1.6MPa or less |
0.9 | |||||||||||
| Greater than 1.6MPa 2.0MPa or less |
0.8 | |||||||||||
| Greater than 2.0MPa | 0.7 | |||||||||||
| Coefficient3 | Coefficient related to fluid maximum working temperature; for hot or cold water, use the average value of the coefficient at the temperature concerned |
40℃ or less | 1.0 | |||||||||
| 50℃ or less | 0.9 | |||||||||||
| 60℃ or less | 0.8 | |||||||||||
| 70℃ or less | 0.7 | 0.7 | 0.7 | |||||||||
| 80℃ or less | 0.5 | 0.5 | 0.5※2 | |||||||||
| Coefficient 4 | Coefficient related to operating time (annual total calculated as a daily amount) |
Less than 10 hours per day |
1.0 | |||||||||
| 10 hours or more per day |
0.9 | |||||||||||
| 15 hours or more per day |
0.7 | |||||||||||
| 20 hours or more per day |
0.6 | |||||||||||
| Coefficient 5 | Coefficient related to repeated displacement |
Does not occur | 1.0 | |||||||||
| Occurs | 0.8 | |||||||||||
| Coefficient6 | Coefficient related to pump start/stop frequency |
1Less than 10 times per day |
1.0 | |||||||||
| 10 times or more per day |
0.8 | 0.9 | 0.8 | |||||||||
| Coefficient 7 | Coefficient related to pressure fluctuations (maximum pressure/ static pressure) |
Less than 1.5 times | 1.0 | |||||||||
| 1.5 times or more | 0.8 | |||||||||||
| Coefficient8 | Coefficient related to exposure to the elements |
Other than exposure to the elements |
1.0 | |||||||||
| Exposure to the elements |
0.9 | |||||||||||
| Coefficient 9 | Coefficient related to displacement rate (working displacement amount/tolerance) |
50% or less | 1.0 | |||||||||
| Greater than 50% | 0.8 | |||||||||||
*1 The L Series coefficient 1 is 1.2 for standard types, and 1.5 when the reinforcing cord is aramid fiber
*2 The L Series maximum working temperature is no more than 70°C for standard types, and no more than 80°C when the reinforcing cord is aramid fiber.
Service life of Facolex
When installed in typical air conditioning piping lines, the service life of Facolex is calculated as per the following formula. Note that the standard service life is 10 years, and the various coefficients are chosen from the following table based on the individual factors.
Service life = standard service life (10 years) x coefficient 1~coefficient 6 /p>
| Coefficient No. | Factor | Coefficient value | |||
|---|---|---|---|---|---|
| Coefficient 1 | Coefficient related to the distinctive structure, materials, and shape etc. of products |
Product name FACOLEX |
Standard | High pressure | |
| 25A・32A | 15A・20A | 20A・25A | |||
| Vibration isolation | 1.5 | ||||
| Flexibility | 1.5 | ||||
| Coefficient2 | Coefficient related to fluid maximum working pressure |
1.0MPa or less | 1.0 | ||
| Greater than 1.0MPa | 0.8 | 0.9 | |||
| Coefficient 3 | Coefficient related to fluid maximum working temperature |
50℃ or less | 1.0 | ||
| 60℃ or less | 0.8 | ||||
| 70℃ or less | 0.7 | ||||
| 80℃ or less | 0.6 | ||||
| 90℃ or less | 0.5 | ||||
| Coefficient4 | Coefficient related to operating time (annual total calculated as a daily amount) |
Less than 10 hours per day | 1.0 | ||
| 10 hours or more per day | 1.0 | ||||
| 15 hours or more per day | 1.0 | ||||
| 20 hours or more per day | 1.0 | ||||
| Coefficient 5 | Coefficient related to repeated displacement |
Does not occur | 1.0 | ||
| Occurs | 0.8 | ||||
| Coefficient6 | Coefficient related to pressure fluctuations (maximum pressure/static pressure) |
Less than 1.5 | 1.0 | ||
| 1.5 times or more | 0.8 | ||||
- Unlike the structure of regular rubber flexible joints (compound elastic bodies comprised of rubber and reinforcing layers), Facolex combines a standalone rubber main body handling sealing functions and SUS braiding handling reinforcing functions.
- Rubber will always degrade, become brittle, and lose strength over time. However, the featured SUS braiding handling reinforcing functions helps Facolex to retain strength. Under these conditions, it is likely that SUS braiding will not degrade over time. We believe that it is thus only necessary to consider the degradation of rubber, particularly the effect of degradation dependent on temperature. However, there are no concerns about leakage incidents caused by corrosion, which tend to happen with stainless steel flexible hoses.
Service life of Fluoro carbon polymer material flexible joints.
The standard service life of fluoro carbon polymer flexible joints is 10 years, and the various coefficients are chosen from the following table based on the applicable individual factors.
Service life = standard service life (10 years) x coefficient 1~coefficient 9
| Coefficient No. | Factor | Coefficient value | ||||
|---|---|---|---|---|---|---|
| Coefficient 1 | Coefficient related to the distinctive structure, materials, and shape etc. of products |
Product name | U-FLEX | LT CONNECTOR | FLONEXa Series |
POLI-T POLI・ POLISOFT INTERFLEX |
| Vibration isolation | 1.2 | 1.0 | ||||
| Flexibility | 1.0 | 1.2 | 1.1 | 1.2 | ||
| Coefficient2 | Coefficient related to fluid maximum working pressure |
1.0MPa or less | 1.0 | |||
| Greater than 1.0MPa | 0.8 | |||||
| Coefficient3 | Coefficient related to fluid maximum working pressure |
100℃ or less | 1.0 | |||
| 130℃ or less | 1.0 | 1.0 | ||||
| Coefficient4 | Coefficient related to
operating time |
Less than 10 hours per day | 1.0 | |||
| 10 hours or more per day | 0.9 | |||||
| 15 hours or more per day | 0.7 | |||||
| 20 hours or more per day | 0.6 | |||||
| Coefficient5 | Coefficient related to repeated displacement |
Does not occur | 1.0 | |||
| Occurs | 0.8 | |||||
| Coefficient6 | Coefficient related to pump start/stop frequency |
Less than 10 times per day | 1.0 | |||
| 10 times or more per day | 0.8 | |||||
| Coefficient 7 | Coefficient related to pressure fluctuations (maximum pressure/static pressure) |
Less than 1.5 times | 1.0 | |||
| 1.5 times or more | 0.8 | |||||
| Coefficient 8 | Coefficient related to exposure to the elements |
Other than exposure to the elements |
1.0 | |||
| Exposure to the elements | 0.9 | 1.0 | ||||
| Coefficient 9 | Coefficient related to displacement rate (working displacement amount /tolerance) |
50％ or less | 1.0 | |||
| More than 50％ | 0.8 | |||||
