Page 287 - Softbound_Edition_19_en

BK4x4
Spool valve

PERFORMANCE SPECIFICATIONS
Oil viscosity u = 30 mm /s
2
p = f (Q) Performance limits Q = f (Q) Leakage volume flow characteristics
L
per control edge
p [bar] Z43/D43 (1) Z41/D41 (1+2) Q [cm /min]
3
350 K0100 Z42/D42 (1+2) 50 K0126
Z43/D43 (2)
300 Z44/D44 (2) 40
250 Z45/D45 (1+2)
200 J40 (1) Z44/D44 (1) Z40 (1+2) 30
150 20
100 10
50 J40 (2)
0 0
0 5 10 15 20 Q [l/min] 0 50 100 150 200 250 300 350 p [bar]
J40/Z40/D41/D42/D44/D45

Δp = f (Q) Pressure drop volume flow characteristics Volume flow direction
p [bar] Symbol P - A P - B P - T A - T B - T
30 K0101 6 Z40 / J40 5 5 - 2 2
25 5 4 D41 / Z41 5 5 - 2 2
20 3
15 2 1 D42 / Z42 5 5 - 1 1
10 D43 / Z43 4 4 6 2 2
5 D44 / Z44 4 4 3 2 2
0 D45 / Z45 4 4 - 2 2
0 5 10 15 20 Q [l/min]

DIMENSIONS
4/3-way valve (spring centred) 4/2-way valve (spring reset)
4/2-way valve (impulse)
9.5
G1/8" 5.2 MD=5.5Nm
6

35 35 38
32

40 10 50 20 30
10 MD=2.8Nm MD=2.8Nm
38 54 10
110
146

HYDRAULIC CONNECTION PARTS LIST
Position Article Description
28 10 254.2000 Pneumatic actuation BK II
14
20 057.4202 Cover
P 30 246.1113 Socket head screw M4 x 12 DIN 912
A B 40 246.1146 Socket head screw M4 x 45 DIN 912
14 27
T T0 50 160.2052 O-ring ID 5,28 x 1,78 (NBR)

Wandfluh AG Postfach CH-3714 Frutigen
Tel. +41 33 672 72 72 Fax +41 33 672 72 12 sales@wandfluh.com

www.wandfluh.com Illustrations are not binding Data subject to change 3/3 Edition: 16 29 1.6-20 E
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