<7. General Specifications>
7-44
IM 01C25W01-01EN
Flange Usage
-S ..................
for general use*
9
-P ..................
for general use (Gasket material: PTFE Teflon)*
10
-H ..................
for high temperature use (Process temperature: 250 to 315°C)*
11
*
12
Vent Plug Style
S .................
for general use (with two vent plugs) *
13
L .................
With two long vent plugs*
14
N .................
Without vent plug
--------
N ..............
Always N
Table 4e. Diaphragm material and Sealing face material
Wetted parts material
*
1
[Diaphragm material]
[Sealing face material]
SS ........................
[S] 316L SST
[S] 316L SST
HH .......................
[H] Hastelloy C-276*
8
#
[H] Hastelloy C-276*
8
#
TT ........................
[T] Tantalum
[T] Tantalum
*1:
Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of
inappropriate materials can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage
to plant facilities. It is also possible that the diaphragm itself can be damaged and that material from the broken diaphragm
and the fill fluid can contaminate the user’s process fluids.
Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium
hypochlorite, and high temperature steam (150°C [302°F] or above). Contact Yokogawa for detailed information of the
wetted parts material.
*2:
Not applicable for gauge transmitter and differential transmitter with single seal type.
*3:
In case where capillary length code 1 (1 m), the model code must be selected for C82FD. Not applicable for C81FD.
*4:
In case where Model code F81FD is selected, It must be Selected seal system location code B.
*5:
Refer to section 12 for limitation of capillary length.
*6:
Forged version of the material may be used.
*7:
Applicable for Diaphragm material code S and H.
Inside of isolating diaphragms (fill fluid side) are gold plated, effective for hydrogen permeation.
*8:
Hastelloy C-276 or N10276.
*9:
Gasket material for transmitter side is 316L SST with PTFE Teflon coating.
*10: Applicable for Diaphragm material code T.
*11: When selecting Flange usage code H (for High temperature use), Drain/vent are welded to the flange.
*12: Not applicable for Diaphragm material code T.
*13: Not applicable for Flange usage code H.
*14: Total length: 119 mm (standard: 34 mm); Total length when combining with option code K31 and K35: 130 mm.
*15: Applicable for capillary length more than 6 m.
The ‘#’marks indicate the construction materials conform to NACE material recommendations per MR0175 (2003).
Please refer to latest standards for details.
Table 4f. 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.
