Burkert 2036 Manuel D'utilisation page 20

remarks
Static leak-tightness:
Valve is closed (diaphragm is in contact with the body seat). One
side of the body seat is under pressure. At the given pressure no
leakage takes place via the body seat.
Dynamic leak-tightness:
Valve is open and the medium is flowing through it. The downstream
flow is only slightly throttled by components placed downstream.
Both sides of the body seat are under pressure. The valve is closed
(CFA, NC via spring force; CFB, NO via pilot pressure). At the
given pressure the valve closes onto the body seat and the seal is
complete.
Static leak-tightness:
Fig. 14: Static and dynamic leak-tightness
20
Dynamic leak-tightness:
english
Type 2036
TechnicalData
pilot pressure and operation pressure for cfB, nO
The following graphs illustrate the required minimum pilot pressure
depending on the medium pressure for control function B.
Permitted pilot pressure range: 2 – 7 bar.
The pilot pressure should be selected to be as low as pos-
sible to reduce wear on the diaphragm.
8
7
6
5
4
3
2
1
0
0 1 2
Range for valves with control unit
Fig. 15: Pilot pressure depending on the medium pressure
RV50/RV110
static
RV70
RV50/RV110
RV70
static dynamic
dynamic
3 4 5 6
Pilot pressure [bar]
7