Endress+Hauser Deltabar S FMD 77 - Oxygen Applications; Ultra Pure Gas Applications; Diaphragms for Materials with Hydrogen Build-Up (Rhodium-Gold Coating); Operating Conditions (Environment)

Deltabar S
Endress+Hauser 23
Oxygen applications Oxygen and other gases can react explosively to oils, grease and plastics, such that, among other things, the
following precautions must be taken:
– All components of the system, such as measuring devices, must be cleaned in accordance with standard
requirements (BAM, DIN 19247, CGA-4.1-1996, AGA G93-96).
– Dependent on the materials used, maximum temperature and a maximum pressure must not be exceeded.
The devices suitable for oxygen applications are listed in the following table with the specifications T
max
and
p
max
.
Ultra pure gas applications Endress+Hauser also offers degreased devices for special applications, such as ultra pure gas.
No special restrictions regarding the process conditions apply to these devices.
→ See also page 53 ff, PMD 70 and PMD 75: feature 80 "Gasket material", FMD 76 and FMD 77: feature 70
"Process connection low-pressure side, material, seal".
Diaphragms for materials with
hydrogen build-up (Rhodium-
Gold coating)
When materials are used in which hydrogen build-up occurs, hydrogen atoms can diffuse through the metals
of the sensor. This can lead to corrupt measurement results.
Endress+Hauser offers diaphragms with Rhodium-Gold coating for this application.
→ See also page 56 "Ordering information PMD 75", page 62 "Ordering information FMD 77" or page 65
"Ordering information FMD 78", feature 60 "Material diaphragm".
Operating conditions (Environment)
Ambient temperature range • PMD 75, FMD 77, FMD 78: –40 to +185°F (–40 to +85°C),
devices for lower temperatures on request
• PMD 70, FMD 76: –40 to +185°F (–40 to +85°C)
For devices for use in hazardous areas, see Safety instructions (XA...), Installation or Control Drawing (ZD...).
(→ See also page 67, sections "Safety Instructions" and "Installation/Control drawings".)
The device can be used in this temperature range; however, certain specification values, such as accuracy, can
be exceeded. → See also DIN 16086.
Order code for devices cleaned for
oxygen applications
p
max
for oxygen
applications
T
max
for oxygen
applications
Restrictive component
PMD 70 – _ _ _ __ _ _ _ 2 _ _ 600 psi (40 bar) 140°F (60°C) FKM Viton V80G2 seal
PMD 75 – _ _ _ __ _ _ _ K _ _ 230 psi (160 bar)
1
1) For devices with 4 inH
2
O (10 mbar) and 12 inH
2
O (30 mbar) measuring cell: 1450 psi (100 bar)
140°F (60°C) Halocarbon 6.3
(copper ring seal)
PMD 75 – _ _ _ __ _ _ _ 2 _ _ 600 psi (40 bar)
2
2) Higher pressures on request
140°F (60°C) FKM Viton V80G2 seal
PMD 75 – _ _ _ __ _ _ _ 3 _ _ 435 psi (30 bar)
2
140°F (60°C) PTFE seal GF 25
FMD 76 – _ _ _ __ _ T _ _ _ 600 psi (40 bar) 140°F (60°C) FKM Viton V80G2 seal
FMD 77 – _ _ _ __ T _ F _ _ 600 psi (40 bar) 140°F (60°C) FKM Viton V80G2 seal
FMD 78 – _ _ _ __ _ __ 4 _ _ 1300 psi (90 bar) 140°F (60°C) Fluorolube FS-5 filling oil