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T4-contribution from shaft seal-safety margin

Russian translation: см.

08:18 Jan 22, 2020
English to Russian translations [PRO]
Tech/Engineering - Engineering (general)
English term or phrase: T4-contribution from shaft seal-safety margin
Прошу помочь перевести фразу из описания насоса:

Maximum liquid temperature
In normal pump operation, the highest temperatures
are to be expected at the surface of the pump casing
and at the shaft seal. The surface temperature will
normally follow the temperature of the liquid.
You can calculate the permissible liquid temperature
by finding the maximum permissible temperature at
the surface of the pump during operation in the table
shown in section 8.3.1 Temperature class, and
reduce it with the temperature contribution from shaft
seals, see table in section 8.3.2 Shaft seal
temperature.
...

Calculation example
Based on temperature contribution from a HQQX
shaft seal, media class 1, shaft diameter ∅22 and
pressure 2.5 Mpa.
Temperature class (T4) = 135 °C, see section
8.3.1 Temperature class.
Temperature contribution from HQQX shaft seal = 24
°C, see section 8.3.2 Shaft seal temperature.
Safety margin for Group II = 5 °C according to the
ATEX standard.
Result
Maximum permissible liquid temperature:
T4-contribution from shaft seal-safety margin = 135 -
24 - 5 = 106 °C.
Maximum permissible liquid temperature:
T4-contribution from shaft seal-safety margin = 135 -
24 - 5 = 106 °C.

Спасибо.
Nadezhda Wenzel
Russian translation:см.
Explanation:
значение температуры для группы воспламеняемости T4 - (минус) составляющая температуры уплотнения вала - (минус) запас надежности

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Note added at 25 мин (2020-01-22 08:44:34 GMT)
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Temperature Classes

The ignition temperature of a flammable gas/liquid is the lowest temperature of a hot surface at which ignition of the gas/air or vapour/air mixture takes place. The maximum surface temperature of the equipment must therefore be lower than the ignition temperature of the ambient atmosphere.
Temperature classes T1 to T6 have been introduced for electrical equipment within a Group II hazardous area.

Class
Hazards which will not ignite at temperature below:
T1
450°C
T2
300°C
T3
200°C
T4
135°C
T5
100°C
T6
85°C

https://www.sensorland.com/HowPage109.html
Selected response from:

Mikhail Zavidin
Local time: 11:17
Grading comment
Благодарю.
4 KudoZ points were awarded for this answer



Summary of answers provided
3см.
Mikhail Zavidin
3Температурный класс T4 - влияние уплотнения вала - запас надежности
Soboleva Kateryna


  

Answers


22 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5
t4-contribution from shaft seal-safety margin
см.


Explanation:
значение температуры для группы воспламеняемости T4 - (минус) составляющая температуры уплотнения вала - (минус) запас надежности

--------------------------------------------------
Note added at 25 мин (2020-01-22 08:44:34 GMT)
--------------------------------------------------

Temperature Classes

The ignition temperature of a flammable gas/liquid is the lowest temperature of a hot surface at which ignition of the gas/air or vapour/air mixture takes place. The maximum surface temperature of the equipment must therefore be lower than the ignition temperature of the ambient atmosphere.
Temperature classes T1 to T6 have been introduced for electrical equipment within a Group II hazardous area.

Class
Hazards which will not ignite at temperature below:
T1
450°C
T2
300°C
T3
200°C
T4
135°C
T5
100°C
T6
85°C

https://www.sensorland.com/HowPage109.html

Mikhail Zavidin
Local time: 11:17
Works in field
Native speaker of: Native in RussianRussian
PRO pts in category: 547
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37 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5
Температурный класс T4 - влияние уплотнения вала - запас надежности


Explanation:
Ловите, там все уже описано. Страница 7, по-моему. Откорректируйте и переводите на здоровье :)
file:///C:/Users/HP/Desktop/Programmi/Grundfosliterature-3417.pdf

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Note added at 41 mins (2020-01-22 08:59:50 GMT)
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Простите, сбросила ссылку на свой ПК (бывает). Попробуйте вставить текст и по нему ищите документ
На основании температурного влияния уплотнения вала HQQX, класса среды 1, диаметра вала ∅22 и давления 2,5 MПa. Класс температур (T4) = 135 ...

Soboleva Kateryna
Italy
Local time: 10:17
Works in field
Native speaker of: Native in UkrainianUkrainian, Native in RussianRussian
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