TOZEN Corporation

| Site map |

Language

株式会社TOZEN(トーゼン)

 

Technical data

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
TOUGHBOY
TOUGHLEX
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
(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
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