Deltabar S
62
Hauser
Ambient temperature range
The operating temperature range of a diaphragm seal system depends on Fill fluid, "Capillary length and
internal diameter, Process temperature and Diaphragm seal oil volume.
The range of application can be extended by using a fill fluid with a smaller expansion coefficient and a shorter
capillary. The permitted operating temperature ranges in relation to the capillary length can be calculated
online at "Applicator Sizing Diaphragm Seal":
http://www.endress.com/applicator -> Applicator Sizing Diaphragm Seal -> Horncurve
P01-xxxxxxxx-20-xx-xx-en-001
Note!
• Hauser recommends you use a low temperature oil for applications that require short response
times or are close to the lower temperature limit (see "diaphragm seal fill fluid").
• Please contact your Hauser sales office for further information, comprehensive diaphragm seal
system designs and measuring technology solutions that are close to the application limits.
Response time
The viscosity of the filling oil, the capillary length and the capillary internal diameter influence the frictional
resistance. The greater the frictional resistance, the longer the response time.
Furthermore, the volume change of the measuring cell influences the response time. The lower the
volume change of the measuring cell is, the less filling oil has to be shifted in the diaphragm seal system.
The following diagram shows typical response times (T90) for the various filling oils dependent on the
measuring cell and the capillary internal diameter. The values given are in seconds per metre of capillary length
and must be multiplied by the actual length of the capillary. The response time of the transmitter must also be
taken into consideration.
Characteristic
type
Version
Diaphragm seal
8
SB
Pipe seal diaphragm Tri-Clamp, ISO 2852 DN 25 (1"), AISI 316L/1.4435
9
WH
Sanitary tank spud, AISI 316L/1.4435, Extensions 2"
10
TC
Tri-Clamp, ISO 2852 DN 38 (1 – 1 1/2"), DIN 32676 DN 40, AISI 316L/1.4435
11
TB
Tri-Clamp, ISO 2852 DN 25 (1"). DIN 32676 DN 25, AISI 316L/1.4435