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Proportional pressure relief valve
Proportional pressure relief valve

PERFORMANCE SPECIFICATIONS EXECUTION L9 (MEASURED AT 40 °C)
Oil viscosity u = 30 mm /s
2
p = f (Q) Pressure volume flow characteristics p = f (n) Pressure volume flow characteristics
red
red
Maximal adjustable pressure Minimum adjustable pressure
p [bar] p [bar]
400 K0227 40 K0228
P N = 280 bar P N = 160/220/
300 P N = 220 bar 30 280 bar
P N = 20/50/
200 P N = 160 bar 20 80 bar
100 P N = 80 bar 10
P N = 50 bar
0 P N = 20 bar 0
0 25 50 75 100 Q [l/min] 0 25 50 75 100 Q [l/min]

p = f (n) Pressure adjustment characteristics Δp = f (Q) Leakage volume flow characteristics
red
Measured at Q = 1 l/min Q [cm /min]
3
p [%] 250 K0223
100 K0226_1 200
80 150
60 100
40 50
20 0
0 0 50 100 150 200 250 300 350 p [bar]
0 20 40 60 80 100 I [%]

PERFORMANCE SPECIFICATIONS EXECUTION L15 / L17 (MEASURED AT 50 °C)
Oil viscosity u = 30 mm /s
2
p = f (Q) Pressure volume flow characteristics p = f (n) Pressure volume flow characteristics
red red
Maximal adjustable pressure Minimal adjustable pressure
p [bar] p [bar]
400 K0224 40 K0225
P N = 350 bar
P N = 275 bar P N = 200/275/
300 30 350 bar
P N = 200 bar P N = 20/63/
200 20 100 bar
P N = 100 bar
100 10
P N = 63 bar
0 P N = 20 bar 0
0 25 50 75 100 Q [l/min] 0 25 50 75 100 Q [l/min]

p = f (n) Pressure adjustment characteristics Δp = f (Q) Leakage volume flow characteristics
red
Measured at Q = 1 l/min Q [cm /min]
3
p [%] 250 K0223
100 K0226 200
80 150
60 100
40 50
20 0
0 0 50 100 150 200 250 300 350 p [bar]
0 20 40 60 80 100 I [%]

www.wandfluh.com Illustrations are not binding Data subject to change 3/4 Edition: 21 21 2.3-536 E
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