Burkert Type 2731 - Manual (Page 11)

6.6 Operating conditions
6.6.1 Temperature ranges
Warning!
risk of injury, chemical burns, scalding due to the device
rupturing at excessively high pressure!
▶ Do not exceed the maximum pilot and medium pressure.
▶ Observe permitted ambient and medium temperature.
▶ Observe specifications on the type label.
Follow instructions for use in the Ex area!
See chapter “3.1”
.
permitted ambient temperature actuators
actuator size actuator material environment 1)
ø 80 mm
PA, PPS -10 – +60 °C ø 100 mm
ø 125 mm
Tab. 2: Permitted ambient temperature actuators
1)
If using a pilot valve / control unit, observe its temperature
range.
permitted medium temperature for body
Plastic body: note that the permissible medium pressure is
dependent on the medium temperature (see “Fig. 6: Graph
of medium pressure / medium temperature”).
Body material medium
PVDF (PD) -10 – +120 °C
PP (PP) -10 – +80 °C
PVC (PV) -10 – +60 °C
Stainless steel body
(VA)
1.4404 (AISI 316L)
-10 – +140 °C
Cast body (VG) 1.4435 (AISI 316L)
Forged body (VS)
1.4435 BN2 (AISI 316L)
according to ASME BPE
1997
Tab. 3: Permitted medium temperature for body
permitted medium temperature for diaphragms
The indicated medium temperatures apply only to media
which do not corrode or swell the diaphragm materials.
The behavior of the medium with respect to the diaphragm
may be changed by the medium temperature.
The function properties, in particular the service life of the dia-
phragm, may deteriorate if the medium temperature increases.
11
Technicaldata
english
Type 2730 / 2731 / 2731K