20
© 11.2023
*) if possible not greater than 450 mbar
**) If the control device is set up for simultaneous monitoring of upper and lower response pressures, the difference
between the setpoints for the upper and lower response pressures (p
dso
and p
dsu
) should be at least 10% greater
than the total of values given for Δp
wo
and Δp
wu
.
***) The upper response pressure is rounded up to full tens, for example 251 mbar-> 260 mbar
Determining the upper response pressure
Outlet pressure P
d
(mbar)
Upper response pressure W
dso
***
≤200 P
d
+100 mbar
>200 - ≤800 P
d
x 1.5
>800 - ≤1600 P
d
x 1.3
>1600 P
d
+500 mbar
RS 250: DN 150 - 200 / RS 251: DN 100
large ball lock
ND MD
to
W
ds o
200mbar to W
ds o
300mbar
Spring data
Lower response
pressure
Upper response
pressure
Lower response
pressure
Upper response
pressure
Feder Nr.
Farbe
[RAL]
W
ds u
[mbar]
Δp
wu
[mbar]
W
ds o
[mbar]
Δp
wo
[mbar]
W
ds u
[mbar]
Δp
wu
[mbar]
W
ds o
[mbar]
Δp
wo
[mbar]
FM 400 1028 2 - 25 20 10 - 40* 20
FM 402 6010 35 - 115 20
FM 404 9005 60 - 245 20
FL 411 2002 28 - 76 20
FL 412 6010 48 - 114 20 40 - 180 20
FL 413 5015 93 - 200 20 70 - 300 20
FL 415 9010
FL 417 4010
RS 250: DN 150 - 200 / RS 251: DN 100
large ball lock
MD-R HD
bis
W
ds o
3500mbar bis W
ds o
8000mbar
Spring data
Lower response
pressure
Upper response
pressure
Lower response
pressure
Upper response
pressure
Feder Nr.
Farbe
[RAL]
W
ds u
[mbar]
Δp
wu
[mbar]
W
ds o
[mbar]
Δp
wo
[mbar]
W
ds u
[mbar]
Δp
wu
[mbar]
W
ds o
[mbar]
Δp
wo
[mbar]
FM 400 1028 20 - 180* 50 0 - 250 500
FM 402 6010 155 - 380 50 150 - 1000* 500
FM 404 9005 200 - 950 50 650 - 2050 500
FL 411 2002
FL 412 6010 145 - 670 50 380 - 1400 300
FL 413 5015 270 - 1230 50 800 - 2800 300
FL 415 9010 1200 - 3500 50 3200 - 5500 300
FL 417 4010 4500 - 8000 300