Page 12 - Parker - P1/PD series medium duty axial piston pumps

HY28-2665-01/P1/EN Medium Duty Axial Piston Pumps
Technical Information P1/PD Series

Torque Limiting Control “ALT” Control ( Available on P’045, separate load sense and
with Maximum Pressure Limiter P’060 Models) pressure limiter spools which
AMT, ALT, LOT results in optimal flow versus
The “ALT” combines the functions pressure characteristics, and more
These controls provide the benefit of a pressure limiter, load sense productivity for the application. The
of pressure limiting control , plus and torque limiter control . The load sense control function requires J
Pressure Compensator
Adjusting Screw
A
the ability to limit the input torque pressure limiter function limits the the signal port to be connected to Z
B
the pump will draw. These controls maximum pump outlet pressure. G the highest load pressure via a load
are beneficial when the power The load sense control function sense signal line. The control will
"V" VENT PORT
7/16-20UNF-2A SAE J514
available from the prime mover requires the vent port to be match pump output flow and
37° FLARED FITTING
for the hydraulics is limited; or the connected to the highest load pressure to the system demand,
L
application power demand has both pressure via a load sense signal thus minimizing horsepower losses.
MAX
high flow/low pressure and low flow/ line. The control will match pump The pump will operate in a load M
1.023 [1.023]
A
high pressure duty cycles. output flow and pressure to the sense mode until the torque
T
P
system demand , thus minimizing limiter setting is reached, and
“AMT” Control ( Available on P’045, horsepower losses. The pump then the pump will maintain the
P’060, P’075, P’100, P’140 Models) will operate in a load sense mode P1/PD*** with TORQUE LIMITER
input torque at the pre-selected
CW ORIENTATION
TYPICAL DISPLACEMENT vs SYSTEM PRESSURE CURVE
until the torque limiter setting is setting. If the system pressure
1800 RPM, LDS
The “AMT” combines the functions reached, and then the pump will CW Rotation P*075 SHOWN
120
Arrow reaches the pressure compensa-
of a pressure limiter and a torque maintain the input torque at the tor setting, then the pump flow will
limiter control . The pressure limiter pre-selected setting. If the system be lowered to the level needed to
100
AMT CONTROL
function can also be controlled pressure reaches the pressure maintain the maximum pressure
Displacement - %
80
remotely by connecting the vent compensator setting, then the setting.
port to an external pilot relief valve. pump flow will be lowered to the B V
60
The pump will maintain maximum level needed to maintain the .8mm
displacement until the torque limiter maximum pressure setting. 25% Torque Setting
40
setting is reached, and then the 50% Torque Setting
pump will maintain the input torque “L0T” Control ( Available on P’075,
20
at the pre-selected setting. If the P’100, P’140 Models) 75% Torque Setting
BG
system pressure reaches the 0 D3
2500
500
0
2000
3000
pressure compensator setting, The “L0T” combines the functions 1000 1500 System Pressure- psi 3500 4000 4500 D2
then the pump flow will be lowered of a pressure limiter, load sense
to the level needed to maintain and torque limiter control . This A D1
the maximum pressure setting. high performance control features Torque Limiter
AMT Shown
CCW ORIENTATION
P*075 SHOWN
P1/PD*** with TORQUE LIMITER CCW Rotation P1/PD*** with TORQUE LIMITER J
Arrow
TYPICAL DISPLACEMENT vs SYSTEM PRESSURE CURVE TYPICAL PERCENT of FULL TORQUE vs SYSTEM PRESSURE CURVE Z
1800 RPM, LDS 1800 RPM, LDS
120 TORQUE LOCKNUT
100 1.13 (inch) HEX
90 TORQUE ADJUSTING NUT
100 75% Torque Setting .94 (inch) HEX
80 75%
Displacement - % 60 P A Full Torque - % T 60 50% MAX K
70
80
H
50
40 25% Torque Setting 40 50% Torque Setting
30 25% "V" VENT PORT
50% Torque Setting 7/16-20UNF-2A SAE J514
20 37° FLARED FITTING
20 G 25% Torque Setting
75% Torque Setting 10 B
Pressure Compensator
0 0 0 A 500 1000 1500 2000 2500 3000 Adjusting Screw 4500
4000
3500
0 500 1000 1500 2000 2500 3000 3500 4000 4500
System Pressure- psi System Pressure - psi
Parker Hannifin Corporation
Hydraulic Pump Division
0 Marysville, Ohio USA
P1/PD*** with TORQUE LIMITER
TYPICAL PERCENT of FULL TORQUE vs SYSTEM PRESSURE CURVE
1800 RPM, LDS
100
90
75% Torque Setting
80 75%
70
Full Torque - % 60 50%
50
40
30 25% 50% Torque Setting
20
25% Torque Setting
10
0
0 500 1000 1500 2000 2500 3000 3500 4000 4500
System Pressure - psi