Delta Controls D-Series TDSST - Manual (Page 2)

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D-Series
Models: S-T
Dimensions
Version Diaphragm
diameter
Dm
Contact face
diameter
d1
Diameter
of bolt
circle K External
diameter
D
Thick-
ness
d
Diameter
of holes
L
Number
of
holes
Tube
length
T
DN50 PN40
2’’ANSI 150 48
48 102
92
125
120,5
165
150 22
20 18
20 4
4
DN80 PN40
3’’ ANSI 150 75
75 138
127 160
152,5
200
190 24
24 18
20 8
4
50, 100
150, 200
DN100 PN40
4’’ANSI 150 88
89 162
158 190
190,5
235
230 24
24 22
20 8
8 50, 100
150
The diaphragm seal is a pressure transmitting, diaphragm-type device. The pressure signal is sent to the cooperating
pressure measuring device (pressure transmitter, pressure gauge) through manometric liquid filling the space between the
separating diaphragm of the seal and the pressure measuring device. The diaphragm seal task is to isolate the pressure
measuring device from damaging impacts caused by either medium or installation:
s Low or high temperature, increased viscosity, and impurities
s Tendency of crystallisation on the tank walls
s Vibrations of the installation (remote diaphragm seal)
The flanged diaphragm seal with extended diaphragm is typically applies to measure the pressure or level of the media in a
multi-walled tank, where the separating diaphragm should be placed close to the inner wall of the tank.
Application
Recommended minimum measuring range (bar)
depending on the type of the set: pressure measuring device - diaphragm seal
Pressure
measuring device
Seal type Diaphragm Seal Version
DN50 / 2’’ DN80 / 3’’ DN100 / 4’’
Smart
transmitters∗
direct 0.4 0.1 0.1
remote (2 m) 6 0.5 0.25
PCE-28
direct 0.1 0.1 0.1
remote (2 m) 2 0.5 2.5
Measuring Ranges
Additional absolute zero error resulting from ambient temperature fluctuations, depending
on the type of the set: pressure transmitter - diaphragm seal with a 100 mm of tube
Diaphragm seal type Absolute zero error per 10°C for the diaphragm seal
DN50 / 2’’ DN80 / 3’’ DN100 / 4’’
direct 2 mbar 0.6 mbar 0.4 mbar
remote (2 m capillary) 10 mbar 2 mbar 1 mbar
Temperature range of measured medium
Remote diaphragm seal Direct dia phragm seal
Manometric liquid Underpressure measurements Overpressure measurements
high-temperature (DC) -10...150°C -10...315°C -30...150°C
low-temperature (AK) not recommended for measurement
of pressures < 0.5 bar ABS
-60...200°C
Note: When operating with an ambient temperature of < -15°C, heating of capillaries filled with DC fluid is recommended.
An additional zero error, resulting from
temperature fluctuations in a medium,
depends on the temperature gradient in the
oil-based diaphragm sealing system. The error
value is, in any case, significantly smaller than
the error value shown in the table.
Maximum pressure for PN40 – 40 bar
Maximum pressure for ANSI 150 – 150 psi
Material of diaphragm, tube and flange 316Lss Special versions
Other standards DIN and ANSI
Direct diaphragm seal for medium temp. over 150°C
Others
Important:
- contact face in diaphragram seal DN50 have a milled slot for a gasket (acc. to DIN 2512 FormN). Version without any
slot available on request. (acc. to DIN 2526 FormE)
- standard outlet of capillary from flange:
direct mounted diaphragm seal - axial
remote mounted diaphragm seal - radial