Anti-Cavitation And Shock Valve - Danfoss MP1 Service Manual

Service Manual
MP1 Motor
Part Options

Anti-Cavitation and Shock Valve

14 | © Danfoss | November 2020
The MP1M fixed motors are available with an anti-cavitation valve option. The key application for this
option is open circuit fan drives.
The anti cavitation valve function as a check valve within the same cavity which is integrated into the
endcap. The check valve function provides protection against cavitation that can occur upon
introduction of an overrunning load or due to loss of input flow. In such case, the system delta pressure
becomes negative and the check valve opens connecting the motor inlet and outlet, effectively short-
circuiting the motor. The shock valve function is intended to be used for system overpressure protection
events of limited duration only. It is not intended for continuous system pressure limitation.
The shock valve is available with 280 bar [4061 psi] or 345 bar [5004 psi] setting.
For this option the high pressure port needs to be defined upfront to get the correct motor rotation.
Reversing the motor is not possible with this option.
Flow direction
Motor shaft rotation (as Port A
seen from shat side)
Clockwise (CW) Out
Counterclockwise (CCW) In
*
See Master Model Code
Anti cavitation and shock valve, Port B High Pressure, Clockwise rotation
A
B
Shock valve Anti-cavitation valve
Port B
In
Out
L2 N
L1
P400636
Anti-cavitation
and shock valve
System Port type, Loop
Flushing & Anti-
*
cavitation
MD1/MD2/SD1/SD2
MC1/MC2/SC1/SC2
P400658
AX323657269473en-000104