Delta TDSST User Manual
Technical Datasheet
D-Series
Flanged Seals with Extended Diaphragm
Models: S-T
L
TDS-ST-A: FEB 2014
Remote connection with:
smart and analog
pressure and differential
pressure transmitters
4 × Æ9
Dm
d1
K
D
Direct connection with:
40
d
smart and analog pressure and
differential pressure transmitters
DIN 2512 Form N standard contact face
(DN50 PN40)
DIN 2526 Form E standard contact face
(DN80 PN40, DN100 PN40)
Length of cover:
54 mm for capillary £ 3 m
84 mm for capillary > 3 m
Capillary from 1 to 3 m
(special versions up to 6 m)
34.5
34.5
T
Diaphragm seal type S-TK-P- diaphragm
seal with direct diaphragm cleaning system
Models: S-T
D-Series
www.delta-controls.com
Dimensions
Version
DN50 PN40
2’’ANSI 150
DN80 PN40
3’’ ANSI 150
DN100 PN40
4’’ANSI 150
Diaphragm
diameter
Dm
48
48
75
75
88
89
Contact face
diameter
d1
102
92
138
127
162
158
Diameter
of bolt
circle K
125
120,5
160
152,5
190
190,5
External
diameter
D
165
150
200
190
235
230
Thick-
ness
d
22
20
24
24
24
24
Diameter
of holes
L
18
20
18
20
22
20
Number
of
holes
4
4
8
4
8
8
Tube
length
T
50, 100
150, 200
50, 100
150
Application
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.
Measuring Ranges
Recommended minimum measuring range (bar)
depending on the type of the set: pressure measuring device - diaphragm seal
Pressure
measuring device
Smart
transmitters∗
PCE-28
Seal type
DN50 / 2’’ DN80 / 3’’ DN100 / 4’’
direct 0.4 0.1 0.1
remote (2 m) 6 0.5 0.25
direct 0.1 0.1 0.1
remote (2 m) 2 0.5 2.5
Diaphragm Seal Version
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
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.
Temperature range of measured medium
Remote diaphragm seal Direct diaphragm 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
Note: When operating with an ambient temperature of < -15°C, heating of capillaries filled with DC fluid is recommended.
of pressures < 0.5 bar ABS
-60...200°C
Maximum pressure for PN40 – 40 bar
Maximum pressure for ANSI 150 – 150 psi
Material of diaphragm, tube and flange 316Lss
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
Models: S-T
D-Series
www.delta-controls.com
Special versions
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