2588
Driller’s Valve
Kobelt Manufacturing Co. Ltd.
Rev A
mnl_2588.docx
11 of 20
3.4
B
RAKE
S
YSTEM
P
LAN
Below is a pipin
g diagram depicting how to utilize the Kobelt 2588 Driller’s valve in a hoist braking
system. When implementing the two-channel 2588-D valve, it is recommended to plumb through a
Barksdale 9001-M-G-D diverter valve to alternate the braking between the two discs at light loads. The
diverter valve must have an open center position spool.
Failure to share the braking duty between the two discs may result in overheating a
disc and causing permanent damage to it.
Loss of braking:
Failure to use an open center diverter valve may result in a sudden loss of braking
during switching and result in an accident.
Figure 4: 2588-D Piping Diagram
