Koso REXA Electraulic Xpac, Installation And Operation Manual

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REXA
Electraulic Actuators & Drives
Xpac
Installation Manual -- Version 5.1 (4/09)
H-3
BOOSTER PUMP CONFIGURATION
Introduction
Our philosophy of precise positioning, actuator mounted components,
minimum power consumption and reduced maintenance directed
product design to smaller size (1.5 horsepower) power modules. As
users became more familiar with our capabilities, a need for larger
pumping systems became evident. Although larger pumps were
available, such capacity and speed would limit our fine positioning.
To solve this dilemma, REXA developed a dual pump operation, which
utilizes a standard
Xpac
power module and a large capacity “Booster
Pump”. The power module provides fine positioning, while a volume
booster pump provides the speed. Duty cycle for the booster pump
is low because it is only needed for gross position changes. Only
the power module operates for small changes in position. This dual
pump operation allows REXA to extend its unique capabilities to very
high thrust or torque units and high-speed operation.
Two sizes of BOOSTER PUMPS are available: the P9 and the P40. The
P9 is used in combination with the ½D size power module to provide
5 times the capacity of a D size power module or 2.5 GPM. A D size
power module is used with the P40. The capacity for this system is
11 GPM equivalent to stroking 80,000 lbs. @ 1 inch per second or
rotating a 50,000 inch-lbs. drive, 90º in one second.
Model number designation is shown as: – ½D, P9 –
– D, P40 –