Ramsey Winch H930 Dow-Lok W/Counterbalance Valve, Less Brake - Manual (Page 6)

4
HYDRAULIC SYSTEMS
Refer to the performance charts, below, to properly match your hydraulic system to the H930 Series Winch perform-
ance. The charts consist of: (1) Line speed, first layer (F.P.M.) vs. gallons per minute (G.P.M.) and (2) Line pull
(lbs.) first layer vs. working pressure (P.S.I). STATIC (solid line) refers to hoisting a suspended load from rest; DY-
NAMIC (dotted line) refers to maintaining the motion of a moving load.
Performance based on a motor displacement of 24 cubic inches with 35 GPM maximum flow rate. See page 14 for
motor port size.
H930 Performance
30,000 Lb. Duty Rating
41:1 Gear Ratio
CONTROL VALVE
3 POSITION, 4 WAY VALVE
(MOTOR OR CYLINDER SPOOL)
HIGH PRESSURE LINE
DUAL-A & B PORT CONTROL
B
MOTOR A
TYPICAL LAYOUT
LOW PRESSURE LINE
PUMP
GALLONS PER MINUTE
20
LINE
PULL, LBS., FIRST
LAYER
5,000
0
0
20,000
15,000
10,000
30,000
25,000
LINE SPEE
D, FPM, FIRST LAYER
3,000
WORKING PRESSURE, P.S.I.
2,000 1,000 0
0
10
D
YN
AM
IC
ST
AT
IC
5
10
15
30 35