520L0635 • Rev EH • June 2009
28
Series 40 Axial Piston Pumps
Technical Information
Features and options
CHECK / HIGH PRESSURE
RELIEF VALVE
Charge check and high pressure relief valves maintain circuit pressure in the proper
range. The check valves allow charge ow to replenish the low pressure side of the
working loop. The high pressure relief valves provide pressure protection to the high
pressure side of the working loop. There are two cartridge style valves to handle each
side of the working loop with ow in either direction.
High pressure relief valves are available in a range of settings. You may specify individual
port pressure settings . If high pressure relief valves are not desired, pumps may be
equipped with charge circuit check valves only.
C Caution
High pressure relief valves are intended for transient overpressure protection and are not
intended for continuous pressure control. Flow over relief valves for extended periods
of time may result in severe heat build up. High ows over relief valves may result in
pressure levels exceed ing the nominal valve setting and potential damage to system
compo nents.
Type Cartridge-style poppet valve
Setting 140-345 bar (2030-5000 psi)
Option Check only - no relief valve
M25 PV
M35 & M44PV
M46 PV
Bypass valve
High pressure/check valve
High pressure
relief valve
P100 590E
Check/high relief valve specs
High pressure relief valve locations
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