Walvoil SD5 - Page 47

BP valve pressure drop
0
10
20
30
40
0 20 40 60
Flow
Pressure
(l/min)
(bar)
(psi)
450
300
150
0
10
20
30
40
0 20 40 60
BPS valve pressure drop
Flow
Pressure
(l/min)
(bar)
(psi)
450
300
150
BP direct type
BPS with pre--opening
1 mounted on port A.
2 mounted on port B.
3 mounted on ports A and B.
BP3 configuration
Example of pressure on port A and port B to tank
BP1 configuration
Example of pressure on port A and port B to tank
A B
P T
BP, BPS pilot check valves
Service valves
Performance data
BPS 1 -- SAE
BP1 BP2 BP3
A B
Cast iron block with pilot check valves.
A B A B
Example of pressure on port B and port A to tank
A B
A B
Example of pressure on port B and port A to tank
BPS1 BPS2 BPS3
PT
P T
BA
PT
Type
Pilot ratio
With
pre--opening
Main
BP
BPS 1 : 16
1 : 5.3
1 : 3.2
Wrench 19
42 Nm / 31 lbft
Wrench 27
42 Nm / 31 lbft
Wrench 27
42 Nm / 31 lbft
/
5 10 15
(US gpm)
5 10 15
(US gpm)
SD5
47DAT003A