<7. General Specifications>
7-40
IM 01C25W01-01EN
Table 4b. Process temperature and Ambient temperature
Code
Process
temperature
*
16
Ambient
temperature
*
19
Working pressure
Specific
gravity
*
20
Silicone oil*
17
*
21
(general use)
A
−10 to 315°C
(14 to 599°F)
−10 to 60°C
(14 to 140°F)
2.7 kPa abs (0.38 psi abs)
to flange rating pressure
1.07
Silicone oil*
17
(general use)
B
−30 to 210°C
(−22 to 410°F)
−30 to 60°C
(−22 to 140°F)
0.94
Silicone oil
(low temperature use)
F
−70 to 100°C
(−94 to 212°F)
−30 to 60°C
(−22 to 140°F)
100 kPa abs (atmospheric pressure)
to flange pressure rating
0.88
Fluorinated oil*
18
(oil-prohibited use)
D
−20 to 120°C
(−4 to 248°F)
−10 to 60°C
(14 to 140°F)
51 kPa abs (7.4 psi abs)
to flange rating pressure
1.90 to 1.92
Ethylene glycol
(low temperature use)
E
−50 to 100°C
(−58 to 212°F)
−40 to 60°C
(−40 to 140°F)
100 kPa abs (atmospheric pressure)
to flange pressure rating
1.09
Propylene glycol
P
−10 to 120°C
(14 to 248°F)
−10 to 60°C
(14 to 140°F)
1.04
Note: The differential pressure transmitter should be installed at least 600 mm below the high pressure (HP) process connection.
However, this value (600 mm) may be affected by ambient temperature, operating pressure, fill fluid or material of the
wetted diaphragm.
Contact YOKOGAWA when the transmitter can not be installed at least 600 mm below the HP process connection.
*16: See figure 1a, 1b ‘Working Pressure and Process Temperature.’
*17: In case of diaphragm material code T (Tantalum), process temperature limit is up to 200°C (392°F).
*18: Even in case where fill fluid code D (fluorinated oil) is selected, if degrease cleansing treatment or both degrease cleansing
and dehydrating treatment for the wetted parts is required, specify option code K31 or K35.
*19: This ambient temperature is the transmitter ambient temperature.
*20: Approximate values at a temperature of 25°C (77°F)
*21: For the process where the process temperature exceeds 250°C, specify Flange usage code –H.
