Burkert Type 2036 - Manual (Page 20)

20
TechnicalData
Type 2036
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: Dynamic leak-tightness:
Fig. 14: Static and dynamic leak-tightness
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.
Pilot pressure [bar]
Medium pressure [bar]
0 1 2 3 4 5 6 7
0
1
2
3
4
5
6
7
8
RV50/RV110
static
RV50/RV110
dynamic RV70
dynamic RV70
static
Range for valves with control unit
Fig. 15: Pilot pressure depending on the medium pressure
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